Patent Publication Number: US-2023146114-A1

Title: Electronic device

Description:
This application is a National Stage of International Patent Application No. PCT/CN2021/073626, filed on Jan. 25, 2021, which claims priority to Chinese Patent Application No. 202010132991.4, filed on Feb. 29, 2020, both of which are hereby incorporated by reference in their entireties. 
    
    
     TECHNICAL FIELD 
     This application relates to the field of antenna technologies, and in particular, to an electronic device. 
     BACKGROUND 
     For electronic devices, especially mobile phone products, with rapid development of key technologies such as curved displays and flexible displays, lightness and thinness and an ultimate screen-to-body ratio of the electronic devices have become a trend. This design greatly reduces antenna arrangement space. In such an environment in which antennas are tightly arranged, it is difficult for a conventional antenna to meet a performance requirement of a plurality of communication frequency bands. Therefore, how to implement an antenna covering a plurality of frequency bands on a mobile phone becomes an urgent task. 
     SUMMARY 
     This application provides an electronic device. An antenna of the electronic device may cover a large quantity of frequency bands. 
     According to a first aspect, this application provides an electronic device. The electronic device includes a circuit board and an antenna structure. The antenna structure includes a first metal segment, a second metal segment, a first conductive segment, a second conductive segment, a first feed circuit, and a second feed circuit. A first gap is formed between the first metal segment and a side surface of the circuit board. A second gap is formed between the second metal segment and a side surface of the circuit board. The second gap is connected to the first gap. 
     In a first direction, the first metal segment includes a first portion, a first ground portion, and a second portion that are successively connected. The second metal segment includes a third portion, a second ground portion, and a fourth portion that are successively connected. A third gap is formed between the second portion and the third portion. The third gap is connected to the first gap and the second gap. An end portion that is of the first portion and that is opposite to the first ground portion is an open end that is not grounded. An end portion that is of the fourth portion and that is opposite to the second ground portion is an open end that is not grounded. 
     A negative electrode of the first feed circuit is grounded. A positive electrode of the first feed circuit is connected to the second portion of the first metal segment, and is connected to the third portion of the second metal segment. 
     The first conductive segment includes a first end and a second end. The first end is grounded. The second end is connected to the first portion of the first metal segment. The second conductive segment includes a third end and a fourth end. The third end is grounded. The fourth end is connected to the fourth portion of the second metal segment. A negative electrode of the second feed circuit is electrically connected between the first end and the second end. A positive electrode of the second feed circuit is electrically connected between the third end and the fourth end. 
     In this embodiment, the antenna structure may be excited to generate a plurality of resonance modes, so that an antenna may cover a plurality of frequency bands. 
     In an embodiment, the antenna structure further includes a first insulation segment and a second insulation segment. In the first direction, the first insulation segment is connected to the open end of the first portion. The second insulation segment is connected to the open end of the fourth portion. 
     In an embodiment, the electronic device includes a bezel, and the circuit board, the first feed circuit, and the second feed circuit are all located in a region enclosed by the bezel. The first metal segment, the second metal segment, the first insulation segment, and the second insulation segment are each a portion of the bezel. The bezel further includes a third insulation segment filled in the third gap. 
     In this embodiment, a radiator of the antenna structure is formed through the bezel, so that antenna design space may be saved. 
     In an embodiment, the antenna structure is configured to generate five resonance modes, to expand a frequency band in which the antenna structure radiates or receives a signal. 
     In an embodiment, the antenna structure further includes a bridge structure. One end of the bridge structure is connected to the second portion of the first metal segment. The other end of the bridge structure is connected to the third portion of the second metal segment. The positive electrode of the first feed circuit is connected to a middle portion of the bridge structure. 
     In this embodiment, the bridge structure has a simple structure, is easy to process, and is easy to implement. 
     In an embodiment, the antenna structure further includes a third conductive segment, a fourth conductive segment, a first matching circuit, and a second matching circuit. The second end of the first conductive segment is successively connected to the first matching circuit, the third conductive segment, and the first portion. The fourth end of the second conductive segment is successively connected to the second matching circuit, the fourth conductive segment, and the fourth portion. 
     In an embodiment, the first conductive segment and the second conductive segment are two symmetrical parallel conducting wires extending from a ground plane in the circuit board. 
     In an embodiment, a width direction of the electronic device is an X direction. A length direction of the electronic device is a Y direction. A thickness direction of the electronic device is a Z direction. In the Z direction, there is a height difference between the first conductive segment and the third conductive segment, and between the second conductive segment and the fourth conductive segment. 
     According to a second aspect, this application provides an electronic device. The electronic device includes a first metal segment, a second metal segment, a circuit board, a first-type antenna, and a second-type antenna. In a first direction, the first metal segment includes a first portion, a first ground portion, and a second portion that are successively connected. The second metal segment includes a third portion, a second ground portion, and a fourth portion that are successively connected. A third gap is formed between the second portion and the third portion, and an end portion that is of the first portion and that is opposite to the first ground portion is an open end that is not grounded. An end portion that is of the fourth portion and that is opposite to the second ground portion is an open end that is not grounded. 
     The first-type antenna includes a first gap and a first feed circuit. The first gap is connected to the third gap. The first gap is provided between the first metal segment and the circuit board, and between the second metal segment and the circuit board. The first gap includes a first side edge and a second side edge. The first side edge is formed by a side edge of the circuit board. The second side edge is formed by the first ground portion, the second portion, the third portion, and the second ground portion. A negative electrode of the first feed circuit is grounded. A positive electrode of the first feed circuit is connected to the second portion of the first metal segment, and is connected to the third portion of the second metal segment. 
     The second-type antenna includes the first portion, the first ground portion, the second ground portion, the fourth portion, a first conductive segment, a second conductive segment, and a second feed circuit. The first conductive segment includes a first end and a second end. The first end is grounded. The second end is connected to the first portion of the first metal segment. The second conductive segment includes a third end and a fourth end. The third end is grounded. The fourth end is connected to the fourth portion of the second metal segment. A negative electrode of the second feed circuit is electrically connected between the first end and the second end. A positive electrode of the second feed circuit is electrically connected between the third end and the fourth end. 
     In this embodiment, the antenna structure may be excited to generate a plurality of resonance modes, so that an antenna may cover a plurality of frequency bands. 
     In an embodiment, the antenna structure further includes a first insulation segment and a second insulation segment. In the first direction, the first insulation segment is connected to the open end of the first portion. The second insulation segment is connected to the open end of the fourth portion. 
     In an embodiment, the electronic device includes a bezel. The circuit board, the first feed circuit, and the second feed circuit are all located in a region enclosed by the bezel. The first metal segment and the second metal segment are each a portion of the bezel. The bezel further includes a third insulation segment filled in the third gap. 
     In this embodiment, a radiator of the antenna structure is formed through the bezel, so that antenna design space may be saved. 
     In an embodiment, the antenna structure is configured to generate five resonance modes, to expand a frequency band in which the antenna structure radiates or receives a signal. 
     In an embodiment, the antenna structure further includes a bridge structure. One end of the bridge structure is connected to the second portion of the first metal segment. The other end of the bridge structure is connected to the third portion of the second metal segment. The positive electrode of the first feed circuit is connected to a middle portion of the bridge structure. 
     In this embodiment, the bridge structure has a simple structure, is easy to process, and is easy to implement. 
     In an embodiment, the antenna structure further includes a third conductive segment, a fourth conductive segment, a first matching circuit, and a second matching circuit. The second end of the first conductive segment is successively connected to the first matching circuit, the third conductive segment, and the first portion. The fourth end of the second conductive segment is successively connected to the second matching circuit, the fourth conductive segment, and the fourth portion. 
     In an embodiment, the first conductive segment and the second conductive segment are two symmetrical parallel conducting wires extending from a ground plane in the circuit board. 
     In an embodiment, a width direction of the electronic device is an X direction. A length direction of the electronic device is a Y direction. A thickness direction of the electronic device is a Z direction. In the Z direction, there is a height difference between the first conductive segment and the third conductive segment, and between the second conductive segment and the fourth conductive segment. 
     According to a third aspect, this application provides an electronic device. The electronic device includes a circuit board and an antenna structure. The antenna structure includes a first metal segment, a second metal segment, a third metal segment, a first conductive segment, a second conductive segment, a first feed circuit, and a second feed circuit. A first gap is formed between the first metal segment and a side surface of the circuit board. A second gap is formed between the second metal segment and a side surface of the circuit board. A third gap is formed between the third metal segment and a side surface of the circuit board, and the first gap, the second gap, and the third gap are connected to each other. 
     In a first direction, the second metal segment includes a first portion, a first ground portion, and a second portion that are successively connected. A fourth gap is formed between one end of the first metal segment and the first portion, and the other end of the first metal segment is grounded. A fifth gap is formed between one end of the third metal segment and the second portion, and the other end of the third metal segment is grounded. The fourth gap and the fifth gap are connected to the first gap, the second gap, and the third gap. 
     A negative electrode of the first feed circuit is grounded, and a positive electrode of the first feed circuit is connected to the first portion and the second portion of the second metal segment. 
     The first conductive segment includes a first end and a second end. The first end is grounded, and the second end is connected to the first metal segment. The second conductive segment includes a third end and a fourth end. The third end is grounded. The fourth end is connected to the third metal segment. A negative electrode of the second feed circuit is electrically connected between the first end and the second end. A positive electrode of the second feed circuit is electrically connected between the third end and the fourth end. 
     In an embodiment, the antenna structure is configured to generate six resonance modes, to expand a frequency band in which the antenna structure radiates or receives a signal. 
     In an embodiment, the electronic device includes a bezel. The circuit board, the first feed circuit, and the second feed circuit are all located in a region enclosed by the bezel. The first metal segment, the second metal segment, and the third metal segment are each a portion of the bezel. The bezel further includes a first insulation segment filled in the fourth gap and a second insulation segment filled in the fifth gap. 
     In an embodiment, the antenna structure further includes a bridge structure. One end of the bridge structure is connected to the first portion of the second metal segment. The other end of the bridge structure is connected to the second portion of the second metal segment. The positive electrode of the first feed circuit is connected to a middle portion of the bridge structure. 
     In an embodiment, the antenna structure further includes a third conductive segment, a fourth conductive segment, a first matching circuit, and a second matching circuit. The second end of the first conductive segment is successively connected to the first matching circuit, the third conductive segment, and the first metal segment. The fourth end of the second conductive segment is successively connected to the second matching circuit, the fourth conductive segment, and the third metal segment. 
     In an embodiment, the first conductive segment and the second conductive segment are two symmetrical parallel conducting wires extending from a ground plane in the circuit board. 
     In an embodiment, a width direction of the electronic device is an X direction. A length direction of the electronic device is a Y direction. A thickness direction of the electronic device is a Z direction. In the Z direction, there is a height difference between the first conductive segment and the third conductive segment, and between the second conductive segment and the fourth conductive segment. 
     According to a fourth aspect, this application provides an electronic device. The electronic device includes a circuit board and an antenna structure. The antenna structure includes a first metal segment, a second metal segment, a third metal segment, a fourth metal segment, a first conductive segment, a second conductive segment, a first feed circuit, and a second feed circuit. A first gap is formed between the first metal segment and a side surface of the circuit board. A second gap is formed between the second metal segment and a side surface of the circuit board. A third gap is formed between the third metal segment and a side surface of the circuit board. A fourth gap is formed between the fourth metal segment and a side surface of the circuit board. The first gap, the second gap, the third gap, and the fourth gap are connected to each other. 
     In a first direction, a fifth gap is formed between the second metal segment and the first metal segment. A sixth gap is formed between the second metal segment and the third metal segment. A seventh gap is formed between the third metal segment and the fourth metal segment. The fifth gap, the sixth gap, and the seventh gap are connected to the first gap, the second gap, the third gap, and the fourth gap. An end portion that is of the first metal segment and that is opposite to the fifth gap is grounded. An end portion that is of the second metal segment and that faces the fifth gap is grounded. An end portion that is of the third metal segment and that faces the seventh gap is grounded. An end portion that is of the fourth metal segment and that is opposite to the seventh gap is grounded. 
     A negative electrode of the first feed circuit is grounded. A positive electrode of the first feed circuit is connected to the second metal segment and the third metal segment. 
     The first conductive segment includes a first end and a second end. The first end is grounded. The second end is connected to the first metal segment. The second conductive segment includes a third end and a fourth end. The third end is grounded. The fourth end is connected to the fourth metal segment. A negative electrode of the second feed circuit is electrically connected between the first end and the second end. A positive electrode of the second feed circuit is electrically connected between the third end and the fourth end. 
     In this embodiment, the antenna structure may be excited to generate a plurality of resonance modes, so that an antenna may cover a plurality of frequency bands. 
     In an embodiment, the electronic device includes a bezel. The circuit board, the first feed circuit, and the second feed circuit are all located in a region enclosed by the bezel. The first metal segment, the second metal segment, the third metal segment, and the fourth metal segment are each a portion of the bezel. The bezel further includes a first insulation segment filled in the fifth gap, a second insulation segment filled in the sixth gap, and a third insulation segment filled in the seventh gap. 
     In this embodiment, a radiator of the antenna structure is formed through the bezel, so that antenna design space may be saved. 
     In an embodiment, the antenna structure further includes a bridge structure. One end of the bridge structure is connected to the first portion of the second metal segment. The other end of the bridge structure is connected to the second portion of the second metal segment. The positive electrode of the first feed circuit is connected to a middle portion of the bridge structure. 
     In this embodiment, the bridge structure has a simple structure, is easy to process, and is easy to implement. 
     In an embodiment, the antenna structure further includes a third conductive segment, a fourth conductive segment, a first matching circuit, and a second matching circuit. The second end of the first conductive segment is successively connected to the first matching circuit, the third conductive segment, and the first metal segment. The fourth end of the second conductive segment is successively connected to the second matching circuit, the fourth conductive segment, and the third metal segment. 
     In this embodiment, the first matching circuit is configured to match an antenna impedance. In this case, the first matching circuit may be configured to reduce a size of the first conductive segment and a size of the third conductive segment. The second matching circuit is also configured to match an antenna impedance. In this case, the second matching circuit may be configured to reduce a size of the second conductive segment and a size of the fourth conductive segment. 
     In an embodiment, the first conductive segment and the second conductive segment are two symmetrical parallel conducting wires extending from a ground plane in the circuit board. 
     In an embodiment, a width direction of the electronic device is an X direction. A length direction of the electronic device is a Y direction, and a thickness direction of the electronic device is a Z direction. In the Z direction, there is a height difference between the first conductive segment and the third conductive segment, and between the second conductive segment and the fourth conductive segment. 
     According to a fifth aspect, this application provides an electronic device. The electronic device includes a circuit board and an antenna structure. The antenna structure includes a first metal segment, a second metal segment, a third metal segment, a first conductive segment, a second conductive segment, a first feed circuit, and a second feed circuit. A first gap is formed between the first metal segment and a side surface of the circuit board. A second gap is formed between the second metal segment and a side surface of the circuit board. A third gap is formed between the third metal segment and a side surface of the circuit board. The first gap, the second gap, and the third gap are connected to each other. 
     In a first direction, the second metal segment includes a first portion, a first ground portion, and a second portion that are successively connected. A fourth gap is formed between the first metal segment and the first portion. A fifth gap is formed between the third metal segment and the second portion. The fourth gap and the fifth gap are connected to the first gap, the second gap, and the third gap. An end portion that is of the first metal segment and that faces the second metal segment is grounded. An end portion that is of the fourth metal segment and that faces the second metal segment is grounded. 
     A negative electrode of the first feed circuit is grounded. A positive electrode of the first feed circuit is connected to the first portion and the second portion of the second metal segment. 
     The first conductive segment includes a first end and a second end. The first end is grounded. The second end is connected to the first metal segment. The second conductive segment includes a third end and a fourth end. The third end is grounded. The fourth end is connected to the third metal segment. A negative electrode of the second feed circuit is electrically connected between the first end and the second end. A positive electrode of the second feed circuit is electrically connected between the third end and the fourth end. 
     In this embodiment, the antenna structure may be excited to generate a plurality of resonance modes, so that an antenna may cover a plurality of frequency bands. 
     In an embodiment, the electronic device includes a bezel. The circuit board, the first feed circuit, and the second feed circuit are all located in a region enclosed by the bezel. The first metal segment, the second metal segment, and the third metal segment are each a portion of the bezel. The bezel further includes a first insulation segment filled in the fourth gap and a second insulation segment filled in the fifth gap. 
     In this embodiment, a radiator of the antenna structure is formed through the bezel, so that antenna design space may be saved. 
     In an embodiment, the antenna structure further includes a bridge structure. One end of the bridge structure is connected to the first portion of the second metal segment. The other end of the bridge structure is connected to the second portion of the second metal segment. The positive electrode of the first feed circuit is connected to a middle portion of the bridge structure. 
     In this embodiment, the bridge structure has a simple structure, is easy to process, and is easy to implement. 
     In an embodiment, the antenna structure further includes a third conductive segment, a fourth conductive segment, a first matching circuit, and a second matching circuit. The second end of the first conductive segment is successively connected to the first matching circuit, the third conductive segment, and the first metal segment. The fourth end of the second conductive segment is successively connected to the second matching circuit, the fourth conductive segment, and the third metal segment. 
     In this embodiment, the first matching circuit is configured to match an antenna impedance. In this case, the first matching circuit may be configured to reduce a size of the first conductive segment and a size of the third conductive segment. The second matching circuit is also configured to match an antenna impedance. In this case, the second matching circuit may be configured to reduce a size of the second conductive segment and a size of the fourth conductive segment. 
     In an embodiment, the first conductive segment and the second conductive segment are two symmetrical parallel conducting wires extending from a ground plane in the circuit board. 
     In an embodiment, a width direction of the electronic device is an X direction. A length direction of the electronic device is a Y direction. A thickness direction of the electronic device is a Z direction. In the Z direction, there is a height difference between the first conductive segment and the third conductive segment, and between the second conductive segment and the fourth conductive segment. 
     According to a sixth aspect, this application provides an electronic device. The electronic device includes a circuit board and an antenna structure. The antenna structure includes a first metal segment, a second metal segment, a third metal segment, a first conductive segment, a second conductive segment, a first feed circuit, and a second feed circuit. A first gap is formed between the first metal segment and a side surface of the circuit board. A second gap is formed between the second metal segment and a side surface of the circuit board. A third gap is formed between the third metal segment and a side surface of the circuit board. The first gap, the second gap, and the third gap are connected to each other. 
     In a first direction, a fourth gap is formed between one end of the first metal segment and the second metal segment, and the other end of the first metal segment is grounded. A fifth gap is formed between one end of the third metal segment and the second metal segment, and the other end of the fifth gap is grounded. The fourth gap and the fifth gap are connected to the first gap, the second gap, and the third gap. An end portion that is of the second metal segment and that faces the fourth gap is grounded, and an end portion that is of the second metal segment and that faces the fifth gap is grounded. 
     A negative electrode of the first feed circuit is grounded, and a positive electrode of the first feed circuit is connected to the second metal segment. 
     The first conductive segment includes a first end and a second end. The first end is grounded, and the second end is connected to the first metal segment. The second conductive segment includes a third end and a fourth end. The third end is grounded. The fourth end is connected to the third metal segment. A negative electrode of the second feed circuit is electrically connected between the first end and the second end. A positive electrode of the second feed circuit is electrically connected between the third end and the fourth end. 
     In this embodiment, the antenna structure may be excited to generate a plurality of resonance modes, so that an antenna may cover a plurality of frequency bands. 
     In an embodiment, the electronic device includes a bezel. The circuit board, the first feed circuit, and the second feed circuit are all located in a region enclosed by the bezel. The first metal segment, the second metal segment, and the third metal segment are each a portion of the bezel. The bezel further includes a first insulation segment filled in the fourth gap and a second insulation segment filled in the fifth gap. 
     In this embodiment, a radiator of the antenna structure is formed through the bezel, so that antenna design space may be saved. 
     In an embodiment, the antenna structure further includes a third conductive segment, a fourth conductive segment, a first matching circuit, and a second matching circuit. The second end of the first conductive segment is successively connected to the first matching circuit, the third conductive segment, and the first metal segment. The fourth end of the second conductive segment is successively connected to the second matching circuit, the fourth conductive segment, and the third metal segment. 
     In this embodiment, the first matching circuit is configured to match an antenna impedance. In this case, the first matching circuit may be configured to reduce a size of the first conductive segment and a size of the third conductive segment. The second matching circuit is also configured to match an antenna impedance. In this case, the second matching circuit may be configured to reduce a size of the second conductive segment and a size of the fourth conductive segment. 
     In an embodiment, the first conductive segment and the second conductive segment are two symmetrical parallel conducting wires extending from a ground plane in the circuit board. 
     In an embodiment, a width direction of the electronic device is an X direction. A length direction of the electronic device is a Y direction. A thickness direction of the electronic device is a Z direction. In the Z direction, there is a height difference between the first conductive segment and the third conductive segment, and between the second conductive segment and the fourth conductive segment. 
    
    
     
       BRIEF DESCRIPTION OF DRAWINGS 
         FIG.  1    is a schematic diagram of a structure of an embodiment of an electronic device according to an embodiment of this application; 
         FIG.  2    is a schematic exploded view of the electronic device shown in  FIG.  1   ; 
         FIG.  3 A  is a schematic diagram of a common mode slot antenna according to an embodiment this application; 
         FIG.  3 B  is a schematic diagram of distribution of a current, an electric field, and a magnetic current in a common mode slot antenna mode; 
         FIG.  4 A  is a schematic diagram of a differential mode slot antenna according to an embodiment this application; 
         FIG.  4 B  is a schematic diagram of distribution of a current, an electric field, and a magnetic current in a differential mode slot antenna mode; 
         FIG.  5 A  shows a common mode wire antenna according to an embodiment this application; 
         FIG.  5 B  shows a schematic diagram of distribution of a current and an electric field in a common mode wire antenna mode according to an embodiment this application; 
         FIG.  6 A  shows a differential mode wire antenna according to an embodiment this application; 
         FIG.  6 B  shows distribution of a current and an electric field in a differential mode wire antenna mode according to an embodiment this application; 
         FIG.  7    is an A-A schematic sectional view of the electronic device shown in  FIG.  1   ; 
         FIG.  8    is an enlarged schematic diagram of an embodiment at B of the electronic device shown in  FIG.  7   ; 
         FIG.  9    is a schematic diagram of an embodiment of an antenna structure of the electronic device shown in  FIG.  8   ; 
         FIG.  10    is a curve graph of a reflection coefficient of the antenna structure shown in  FIG.  9   ; 
         FIG.  11    is an efficiency curve graph of the antenna structure shown in  FIG.  9   ; 
         FIG.  12    is an isolation curve graph of the antenna structure shown in  FIG.  9   ; 
         FIG.  13   a    is a schematic diagram of flow directions of a current and an electric field of the antenna structure shown in  FIG.  9    under a signal with a frequency of 1.84 GHz; 
         FIG.  13   b    is a schematic diagram of flow directions of another current and electric field of the antenna structure shown in  FIG.  9    under a signal with a frequency of 2.07 GHz; 
         FIG.  13   c    is a schematic diagram of flow directions of still another current and electric field of the antenna structure shown in  FIG.  9    under a signal with a frequency of 2.49 GHz; 
         FIG.  13   d    is a schematic diagram of flow directions of yet another current and electric field of the antenna structure shown in  FIG.  9    under a signal with a frequency of 2.04 GHz; 
         FIG.  13   e    is a schematic diagram of flow directions of still yet another current and electric field of the antenna structure shown in  FIG.  9    under a signal with a frequency of 2.21 GHz; 
         FIG.  13   f    is a schematic diagram of a radiation direction of the antenna structure shown in  FIG.  9    under a signal with a frequency of 1.84 GHz; 
         FIG.  13   g    is a schematic diagram of another radiation direction of the antenna structure shown in  FIG.  9    under a signal with a frequency of 2.07 GHz; 
         FIG.  13   h    is a schematic diagram of still another radiation direction of the antenna structure shown in  FIG.  9    under a signal with a frequency of 2.49 GHz; 
         FIG.  13   i    is a schematic diagram of yet another radiation direction of the antenna structure shown in  FIG.  9    under a signal with a frequency of 2.04 GHz; 
         FIG.  13   j    is a schematic diagram of still yet another radiation direction of the antenna structure shown in  FIG.  9    under a signal with a frequency of 2.21 GHz; 
         FIG.  14    is a schematic diagram of another embodiment of an antenna structure of the electronic device shown in  FIG.  8   ; 
         FIG.  15    is a schematic diagram of still another embodiment of an antenna structure of the electronic device shown in  FIG.  8   ; 
         FIG.  16    is an enlarged schematic diagram of another embodiment at B of the electronic device shown in  FIG.  7   ; 
         FIG.  17    is a schematic diagram of an embodiment of an antenna structure of the electronic device shown in  FIG.  16   ; 
         FIG.  18    is a curve graph of a reflection coefficient of the antenna structure shown in 
         FIG.  17   ; 
         FIG.  19    is an efficiency curve graph of the antenna structure shown in  FIG.  17   ; 
         FIG.  20    is an isolation curve graph of the antenna structure shown in  FIG.  17   ; 
         FIG.  21   a    is a schematic diagram of flow directions of a current and an electric field of the antenna structure shown in  FIG.  17    under a signal with a frequency of 1.75 GHz; 
         FIG.  21   b    is a schematic diagram of flow directions of another current and electric field of the antenna structure shown in  FIG.  17    under a signal with a frequency of 2.36 GHz; 
         FIG.  21   c    is a schematic diagram of flow directions of further another current and electric field of the antenna structure shown in  FIG.  17    under a signal with a frequency of 2.79 GHz; 
         FIG.  21   d    is a schematic diagram of flow directions of still another current and electric field of the antenna structure shown in  FIG.  17    under a signal with a frequency of 1.87 GHz; 
         FIG.  21   e    is a schematic diagram of flow directions of further still another current and electric field of the antenna structure shown in  FIG.  17    under a signal with a frequency of 2.36 GHz; 
         FIG.  21   f    is a schematic diagram of flow directions of further still another current and electric field of the antenna structure shown in  FIG.  17    under a signal with a frequency of 2.87 GHz; 
         FIG.  21   g    is a schematic diagram of a radiation direction of the antenna structure shown in  FIG.  17    under a signal with a frequency of 1.75 GHz; 
         FIG.  21   h    is a schematic diagram of another radiation direction of the antenna structure shown in  FIG.  17    under a signal with a frequency of 2.36 GHz; 
         FIG.  21   i    is a schematic diagram of still another radiation direction of the antenna structure shown in  FIG.  17    under a signal with a frequency of 2.79 GHz; 
         FIG.  21   j    is a schematic diagram of yet another radiation direction of the antenna structure shown in  FIG.  17    under a signal with a frequency of 1.87 GHz; 
         FIG.  21   k    is a schematic diagram of still yet another radiation direction of the antenna structure shown in  FIG.  17    under a signal with a frequency of 2.36 GHz; 
         FIG.  21   l    is a schematic diagram of a further still another radiation direction of the antenna structure shown in  FIG.  17    under a signal with a frequency of 2.87 GHz; 
         FIG.  22    is a schematic diagram of another embodiment of an antenna structure of the electronic device shown in  FIG.  16   ; 
         FIG.  23   a    is an enlarged schematic diagram of another embodiment at B of the electronic device shown in  FIG.  7   ; 
         FIG.  23   b    is a schematic diagram of an antenna structure of the electronic device shown in  FIG.  23     a;    
         FIG.  24   a    is an enlarged schematic diagram of further another embodiment at B of the electronic device shown in  FIG.  7   ; 
         FIG.  24   b    is a schematic diagram of an antenna structure of the electronic device shown in  FIG.  24     a;    
         FIG.  25   a    is an enlarged schematic diagram of still another embodiment at B of the electronic device shown in  FIG.  7   ; and 
         FIG.  25   b    is a schematic diagram of an antenna structure of the electronic device shown in  FIG.  25     a.    
     
    
    
     DESCRIPTION OF EMBODIMENTS 
     The following describes embodiments of this application with reference to the accompanying drawings in embodiments of this application. 
       FIG.  1    is a schematic diagram of a structure of an embodiment of an electronic device according to an embodiment of this application. The electronic device  100  may be a mobile phone, a tablet personal computer, a laptop computer, a personal digital assistant (PDA), a camera, a personal computer, a notebook computer, an in-vehicle device, a wearable device, augmented reality (AR) glasses, an AR helmet, virtual reality (VR) glasses, or a VR helmet. In the embodiment shown in  FIG.  1   , descriptions are provided by using an example in which the electronic device  100  is a mobile phone. For ease of description, as shown in  FIG.  1   , a width direction of the electronic device  100  is defined as an X axis. A length direction of the electronic device  100  is a Y axis. A thickness direction of the electronic device  100  is a Z axis. 
     Refer to  FIG.  2   , with reference to  FIG.  1   ,  FIG.  2    is an exploded schematic diagram of the electronic device shown in  FIG.  1   . The electronic device  100  includes a housing  10 , a screen  20 , and a circuit board  30 . 
     The housing  10  may be configured to support the screen  20  and a related component in the electronic device  100 . 
     In an embodiment, the housing  10  includes a rear cover  11  and a bezel  12 . The rear cover  11  is disposed opposite to the screen  20 . The rear cover  11  and the screen  20  are mounted on two opposite sides of the bezel  12 . In this case, the rear cover  11 , the bezel  12 , and the screen  20  jointly enclose an accommodating space  13 . The accommodating space  13  may be used to accommodate a component of the electronic device  100 , for example, a battery, a loudspeaker, a microphone, or an earpiece.  FIG.  1    shows a structure that is roughly cuboid and that is enclosed by the rear cover  11 , the bezel  12 , and the screen  20 . 
     In an embodiment, the rear cover  11  may be fixedly connected to the bezel  12  by using adhesive. In another embodiment, the rear cover  11  and the bezel  12  may alternatively form an integrated structure, that is, the rear cover  11  and the bezel  12  are integrally formed. 
     The rear cover  11  may be made of a metal material, or an insulation material, for example, glass or plastic. In addition, the bezel  12  may be made of a metal material, or an insulation material, for example, plastic or glass. 
     The screen  20  is mounted on the housing  10 . The screen  20  may be configured to display an image, a text, and the like. 
     In an embodiment, the screen  20  includes a protection cover  21  and a display  22 . The protection cover  21  is stacked on the display  22 . The protection cover  21  may be disposed against the display  22 , and may be mainly configured to protect the display  22  against dust. A material of the protection cover  21  may be but is not limited to glass. The display  22  may be an organic light-emitting diode (OLED) display, an active matrix organic light-emitting diode or active-matrix organic light-emitting diode (acAMOLED) display, a mini light-emitting diode display, or a micro light-emitting diode display, micro organic light-emitting diode display, quantum dot light-emitting diode (QLED) display. 
     The circuit board  30  may be configured to mount an electronic component of the electronic device  100 . For example, the electronic component may include a central processing unit (CPU), a battery management unit, and a baseband processing unit. The circuit board  30  is located between the screen  20  and the rear cover  11 , that is, the circuit board  30  is located in the accommodating space  13 . A position of the circuit board  30  in the electronic device  100  is not limited to a position shown by a dashed line in  FIG.  1   . 
     In addition, the circuit board  30  may be a rigid circuit board, or may be a flexible circuit board, or may be a combination of a rigid circuit board and a flexible circuit board. In addition, the circuit board  30  may be an FR-4 dielectric board, or may be a Rogers dielectric board, or may be a hybrid dielectric board of Rogers and FR-4, or the like. Herein, FR-4 is a grade designation for a flame-resistant material, and the Rogers dielectric board is a high frequency board. 
     In addition, the electronic device  100  includes a plurality of antennas. In this application, “plurality” means at least two. The antenna is configured to transmit and receive an electromagnetic wave signal. Each antenna in the electronic device  100  may be configured to cover one or more communication frequency bands. Different antennas may be further reused to improve utilization of the antennas. 
     The electronic device  100  may communicate with a network or another device through an antenna or by using one or more of the following communication technologies. The communication technology includes a Bluetooth (BT) communication technology, a global positioning system (GPS) communication technology, a wireless fidelity (Wi-Fi) communication technology, a global system for mobile communication (GSM) communication technology, a wideband code division multiple access (WCDMA) communication technology, a long term evolution (LTE) communication technology, a 5G communication technology, a SUB-6G communication technology, another future communication technology, and the like. 
     In addition, the antenna includes a ground plane. The ground plane may be used to ground a radiator of the antenna. The ground plane may be the circuit board  30  of the electronic device  100 , or may be a portion of the housing  10  of the electronic device  100 . Certainly, the ground plane may alternatively be integrated into another component of the electronic device  100 , for example, the screen  20 . In this application, an example in which the ground plane is the circuit board  30  is used for description. 
     It may be understood that, for example,  FIG.  1    and  FIG.  2    merely show some components included in the electronic device  100 . Actual shapes, actual sizes, and actual structures of these components are not limited by  FIG.  1    and  FIG.  2   . 
     In addition, to bring a more comfortable visual experience to a user, the electronic device  100  may use a bezel-less screen industrial design (ID). The bezel-less screen means a large screen-to-body ratio (usually over 90%). A width of the bezel  12  of the bezel-less screen is greatly reduced, and internal components of the electronic device  100 , such as a front-facing camera, a phone receiver, a fingerprint sensor, and an antenna, need to be rearranged. Especially for the antenna design, the clearance region is reduced and the antenna space is further reduced. However, the size, bandwidth, and efficiency of the antenna are correlated and affect each other. If the antenna size (space) is reduced, the efficiency-bandwidth product of the antenna is definitely reduced. 
     In a conventional antenna design, when antenna design space is further reduced, on a mobile phone with a common ID such as a metal bezel or a glass rear cover, a plurality of different radiators are usually disposed around the entire mobile phone to implement a multi-input multi-output (MIMO) antenna. However, the plurality of different radiators need to meet a high requirement in terms of an antenna form, grounding, feed, and the like, so as to implement high antenna isolation and a low envelope correlation coefficient (ECC). 
     An antenna design solution provided in this application may be applied to a MIMO antenna. A high-isolation and low-ECC feature of the MIMO antenna may be implemented by setting an antenna structure and using two feed manners: a symmetric feed manner and an anti-symmetric feed manner. In addition, the antenna structure can further implement an antenna covering a large quantity of frequency bands, so that the electronic device  100  having limited space can also transmit or receive electromagnetic wave signals of the large quantity of frequency bands. 
     First, four antenna modes in this application are described. 
     1. Common Mode (CM) Slot Antenna Mode 
       FIG.  3 A  is a schematic diagram of a common mode slot antenna according to this application. The slot antenna  101  may include a gap  103 , a feed point  107 , and a feed point  109 . The gap  103  may be opened on a ground plane of the PCB  17 . An opening  105  is disposed on a side of the gap  103 , and the opening  105  may be specifically disposed in a middle position of the side. The feed point  107  and the feed point  109  may be respectively disposed on two sides of the opening  105 . The feed point  107  and the feed point  109  may be respectively configured to connect to a positive electrode and a negative electrode of a feed source of the slot antenna  101 . For example, a coaxial transmission line is used to feed the slot antenna  101 . A central conductor (transmission line center conductor) of the coaxial transmission line may be connected to the feed point  107  through a transmission line, and an outer conductor (transmission line outer conductor) of the coaxial transmission line may be connected to the feed point  109  through a transmission line. The outer conductor of the coaxial transmission line is grounded. 
     In other words, the slot antenna  101  may feed at the opening  105 , and the opening  105  may also be referred to as a feed position. A positive electrode of a feed source may be connected to one side of the opening  105 , and a negative electrode of the feed source may be connected to the other side of the opening  105 . 
       FIG.  3 B  is a schematic diagram of distribution of a current, an electric field, and a magnetic current in a common mode slot antenna mode. The current is codirectionally distributed on two sides of the middle position of the slot antenna  101 , but the electric field and the magnetic current are reversely distributed on two sides of the middle position of the slot antenna  101 . The feed structure shown in  FIG.  3 A  may be referred to as an anti-symmetric feed structure. This slot antenna mode shown in  FIG.  3 B  may be referred to as a CM slot antenna mode. The electric field, the current, and the magnetic current shown in  FIG.  3 B  may be respectively referred to as an electric field, a current, and a magnetic current in the CM slot antenna mode. 
     The current and the electric field in the CM slot antenna mode are generated when slots on both sides of the middle position of the slot antenna  101  respectively work in a ¼ wavelength mode: The current is weak at the middle position of the slot antenna  101 , and is strong at both ends of the slot antenna  101 . The electric field is strong at the middle position of the slot antenna  101  and weak at both ends of the slot antenna  101 . 
     2. Differential Mode (DM) Slot Antenna Mode 
       FIG.  4 A  is a schematic diagram of a differential mode slot antenna according to this application. The slot antenna  110  may include a gap  113 , a feed point  117 , and a feed point  115 . The gap  113  may be opened on a ground plane of the PCB  17 . The feed point  117  and the feed point  115  may be respectively disposed on a middle position on two side edges of the gap  113 . The feed point  117  and the feed point  115  may be respectively configured to connect to a positive electrode and a negative electrode of a feed source of the slot antenna  110 . For example, a coaxial transmission line is used to feed the slot antenna  110 . A central conductor of the coaxial transmission line may be connected to the feed point  117  by using the transmission line, and an outer conductor of the coaxial transmission line may be connected to the feed point  115  by using the transmission line. The outer conductor of the coaxial transmission line is grounded. 
     In other words, a middle position  112  of the slot antenna  110  is connected to a feed source, and the middle position  112  may also be referred to as a feed position. A positive electrode of the feed source may be connected to one side edge of the gap  113 , and a negative electrode of the feed source may be connected to the other side edge of the gap  113 . 
       FIG.  4 B  is a schematic diagram of distribution of a current, an electric field, and a magnetic current in a differential mode slot antenna mode. The current is reversely distributed on two sides of the middle position  112  of the slot antenna  110 , but the electric field and the magnetic current are codirectionally distributed on two sides of the middle position  112  of the slot antenna  110 . The feed structure shown in  FIG.  4 A  may be referred to as a symmetric feed structure. This slot antenna mode shown in  FIG.  4 B  may be referred to as a DM slot antenna mode. The electric field, the current, and the magnetic current shown in  FIG.  4 B  may be distributed as an electric field, a current, and a magnetic current in the DM slot antenna mode. 
     The current and the electric field of the DM slot antenna mode are generated when the entire gap  113  works in a ½ wavelength mode. The current is weak at the middle position of the slot antenna  110 , and is strong at both ends of the slot antenna  110 . The electric field is strong at the middle position of the slot antenna  110  and weak at both ends of the slot antenna  110 . 
     3. Common Mode (CM) Wire Antenna Mode 
       FIG.  5 A  shows a common mode wire antenna according to this application. The wire antenna  101  is connected to a feed source at a middle position  103 . A positive electrode of the feed source is connected to the middle position  103  of the wire antenna  101 , and a negative electrode of the feed source is connected to the ground (for example, a ground plane). 
       FIG.  5 B  shows a schematic diagram of distribution of a current and an electric field in a common mode wire antenna mode according to this application. The current is reverse in direction on both sides of the middle position  103 , and is symmetrically distributed. The electric field is distributed on two sides of the middle position  103 , and is codirectionally distributed. As shown in  FIG.  5 B , the current at a feed  102  is codirectionally distributed. Based on codirectional current distribution at the feed  102 , this feed structure shown in  FIG.  5 A  may be referred to as a symmetric feed structure. The wire antenna mode shown in  FIG.  5 B  may be referred to as a CM wire antenna mode. The current and the electric field shown in  FIG.  5 B  may be respectively referred to as a current and an electric field in the CM wire antenna mode. 
     The current and the electric field in the CM wire antenna mode are generated by two horizontal stubs that are on two sides of the middle position  103  and that are of the wire antenna  101  as a ¼ wavelength antenna. The current is strong at the middle position  103  of the wire antenna  101  and weak at both ends of the wire antenna  101 . The electric field is weak at the middle position  103  of the wire antenna  101  and strong at both ends of the wire antenna  101 . 
     4. Differential Mode (DM) Wire Antenna Mode 
       FIG.  6 A  shows a differential mode wire antenna according to this application. The wire antenna  104  is connected to a feed source at a middle position  106 . A positive electrode of the feed source is connected to one side of the middle position  106 , and a negative electrode of the feed source is connected to the other side of the middle position  106 . 
       FIG.  6 B  shows distribution of a current and an electric field in a differential mode wire antenna mode according to this application. The current is codirectional on both sides of the middle position  106 , and is distributed in an anti-symmetric manner. The electric field is distributed reversely on both sides of the middle position  106 . As shown in  FIG.  6 B , the current at a feed  105  is reversely distributed. Based on reverse current distribution at the feed  105 , this feed structure shown in  FIG.  6 A  may be referred to as an anti-symmetric feed structure. The wire antenna mode shown in  FIG.  6 B  may be referred to as a DM wire antenna mode. The current and the electric field shown in  FIG.  6 B  may be respectively referred to as a current and an electric field in the DM wire antenna mode. 
     The current and the electric field in the DM wire antenna mode are generated by the entire wire antenna  104  as a ½ wavelength antenna. The current is strong at the middle position  106  of the wire antenna  104  and weak at both ends of the wire antenna  104 . The electric field is weak at the middle position  106  of the wire antenna  104  and strong at both ends of the wire antenna  104 . 
     In a first embodiment, an antenna structure including a slot antenna and a wire antenna is disposed, and two feed manners are used, so that the antenna structure is excited to generate four antenna modes: a common mode slot antenna, a differential mode slot antenna, a common mode wire antenna, and a differential mode wire antenna. In this way, in this embodiment, two feed manners may be used, so that the antenna structure including the slot antenna and the wire antenna is excited to generate a plurality of resonance modes. This implements that an antenna may cover a plurality of frequency bands. 
       FIG.  7    is an A-A partial schematic sectional view of the electronic device shown in  FIG.  1   . The bezel  12  includes a first long bezel  121  and a second long bezel  122  that are disposed opposite to each other, and a first short bezel  123  and a second short bezel  124  that are disposed opposite to each other. The first short bezel  123  and the second short bezel  124  are connected between the first long bezel  121  and the second long bezel  122 . In this case, the bezel  12  is rectangular or roughly rectangular. The circuit board  30  is located in a region enclosed by the first long bezel  121 , the second long bezel  122 , the first short bezel  123 , and the second short bezel  124 . In this embodiment, an example in which a radiator of the antenna structure is a portion of the first short bezel  123  is used for description. In another embodiment, a radiator of the antenna structure may alternatively be a portion of the first long bezel  121 , a portion of the second long bezel  122 , or a portion of the second short bezel  124 . Certainly, in another embodiment, two or more of a portion of the first long bezel  121 , a portion of the second long bezel  122 , a portion of the first short bezel  123 , and a portion of the second short bezel  124  may be used as radiators of the antenna structure. 
       FIG.  8    is an enlarged schematic diagram of an embodiment at B of the electronic device shown in  FIG.  7   . 
     First, a structure of a radiator of a slot antenna and a structure of a radiator of a wire antenna are described in detail with reference to related accompanying drawings. 
     In a first direction ( FIG.  8    shows that the first direction is an X direction, and in another embodiment, the first direction may also be a Y direction), the first short bezel  123  includes a first metal segment  1231 , a first insulation segment  1232 , and a second metal segment  1233  that are successively connected, that is, the first insulation segment  1232  is connected between the first metal segment  1231  and the second metal segment  1233 . In this case, the first insulation segment  1232  electrically isolates the first metal segment  1231  from the second metal segment  1233 . It may be understood that a third gap is formed between the first metal segment  1231  and the second metal segment  1233 . The first insulation segment  1232  may be formed by filling the third gap with an insulation material. For example, the insulation material may be a material such as polymer, glass, or ceramic, or a combination of these materials. In another embodiment, the third gap may be filled with air, that is, the third gap is not filled with any insulation material. 
     In another embodiment, at least one suspended metal segment may also be disposed in the third gap. In this case, the third gap is divided into a plurality of portions by the suspended metal segment. 
     In another embodiment, locations of the first metal segment  1231  and the second metal segment  1233  may be exchanged. In this case, the first metal segment  1231  is located on a right side of the first insulation segment  1232 . The second metal segment  1233  is located on a left side of the first insulation segment  1232 . 
     The first metal segment  1231  includes a first portion  1 , a first ground portion  2 , and a second portion  3  that are successively connected. In other words, the first ground portion  2  is connected between the first portion  1  and the second portion  3 . The first ground portion  2  is a grounded portion in the first metal segment  1231 . A size and a shape of the first ground portion  2  are not limited to those shown in  FIG.  8   . 
     It may be understood that the first ground portion  2  may be grounded in a plurality of manners. In an embodiment, the bezel  12  includes a connection stub  125 . The connection stub  125  is made of a conductive material, for example, a metal material. In this case, the first ground portion  2  is electrically connected to the ground plane of the circuit board  30  through the connection stub  125 . The connection stub  125  and the first metal segment  1231  may be an integrated structure. Certainly, the connection stub  125  may also be fastened to the first metal segment  1231  through soldering or bonding. In another embodiment, the electronic device  100  may also include a dome. The first ground portion  2  is electrically connected to the ground plane of the circuit board  30  through the dome. 
     In addition, a first gap  31  is disposed between the first metal segment  1231  and the circuit board  30 . The first gap  31  connects the first metal segment  1231  and the second metal segment  1233 , to form a third gap. In an embodiment, the first gap  31  may be filled with an insulation material. For example, the first gap  31  may be filled with a material such as polymer, glass, or ceramic, or a combination of these materials. In another embodiment, the first gap  31  may be filled with air, that is, the first gap  31  is not filled with any insulation material. 
     In addition, the second metal segment  1233  includes a third portion  4 , a second ground portion  5 , and a third portion  6 . It may be understood that the second ground portion  5  is a grounded portion of the second metal segment  1233 . Specifically, the second ground portion  5  is electrically connected to the ground plane of the circuit board  30 . For an electrical connection manner between the second ground portion  5  and the ground plane of the circuit board  30 , refer to an electrical connection manner between the first ground portion  2  and the ground plane of the circuit board  30 . 
     In addition, a second gap  32  is disposed between the second metal segment  1233  and the circuit board  30 . The second gap  32  is connected to the first gap  31 . In addition, the second gap  32  connects the first metal segment  1231  and the second metal segment  1233 , to form a third gap. For a disposition manner of the second gap  32 , refer to the disposition manner of the first gap  31 , and details are not described herein again. 
     Refer to  FIG.  9   , with reference to  FIG.  8   ,  FIG.  9    is a schematic diagram of an embodiment of an antenna structure of the electronic device shown in  FIG.  8   . The first portion  1  and the first ground portion  2  form a first radiator  101 . The second portion  3  and the first ground portion  2  form the second radiator  102 . In this case, the first ground portion  2  is a ground end of the first radiator  101  and the second radiator  102 . An end portion that is of the first radiator  101  and that is away from the first ground portion  2  is an open end that is not grounded. An end portion that is of the second radiator  102  and that is away from the first ground portion  2  is an open end that is not grounded. 
     In addition, the third portion  4  and the second ground portion  5  form a third radiator  103 . The fourth portion  6  and the second ground portion  5  form the fourth radiator  104 . In this case, the second ground portion  5  is a ground end of the third radiator  103  and the fourth radiator  104 , and an end portion that is of the third radiator  103  and that is away from the second ground portion  5  is an open end that is not grounded. An end portion that is of the fourth radiator  104  and that is away from the second ground portion  5  is an open end that is not grounded. 
     In this way, the second radiator  102  and the third radiator  103  form a radiator of a slot antenna  40 . The first radiator  101  and the fourth radiator  104  form a radiator of a wire antenna  50 . 
     In this embodiment, a length of the second radiator  102  is equal to a length of the third radiator  103 , and both the length of the second radiator  102  and the length of the third radiator  103  are ¼ wavelength. The wavelength may be obtained through calculation based on operating frequencies f1 of the second radiator  102  and the third radiator  103 . Specifically, wavelength of a radiation signal in the air may be calculated as follows: Wavelength=Speed of light/f1. The wavelength of the radiation signal in a medium may be calculated as follows: Wavelength=(Speed of light/√ε/f1, where ε is a relative dielectric constant of the medium. In this case, the radiator of the slot antenna  40  has good symmetry. It may be understood that, in an actual application, the length of the second radiator  102  is difficult to be totally equal to the length of the third radiator  103 , and this structural imbalance may be compensated for by adjusting a matching circuit or the like. 
     A length of the first radiator  101  is equal to a length of the fourth radiator  104 , and the length of the first radiator  101  and the length of the fourth radiator  104  are ¼ wavelength. The wavelength may be obtained through calculation based on operating frequencies f1 of the first radiator  101  and the fourth radiator  104 . Specifically, wavelength of a radiation signal in the air may be calculated as follows: Wavelength=Speed of light/f1. The wavelength of the radiation signal in a medium may be calculated as follows: Wavelength=(Speed of light/√ε)/f1, where E is a relative dielectric constant of the medium. In this case, a radiator of the wire antenna  50  is better. It may be understood that, in an actual application, the length of the first radiator  101  is difficult to be totally equal to the length of the fourth radiator  104 , and this structural imbalance may be compensated for by adjusting a matching circuit or the like. 
     In another embodiment, the length of the second radiator  102  may be alternatively unequal to the length of the third radiator  103 . The length of the first radiator  101  may also be unequal to the length of the fourth radiator  104 . 
     Refer to  FIG.  8    again. The first short bezel  123  may further include a second insulation segment  1237  and a third insulation segment  1239 . The second insulation segment  1237  is connected to the first portion  1 . The third insulation segment  1239  is connected to the fourth portion  6 . The second insulation segment  1237  is configured to electrically isolate the first metal segment  1231  from another metal segment of the bezel  12 . The third insulation segment  1239  is configured to electrically isolate the second metal segment  1233  from another metal segment of the bezel  12 . 
     Second, the following specifically describes a symmetric feed manner with reference to related accompanying drawings. 
     Refer to  FIG.  8    and  FIG.  9    again. The slot antenna  40  includes a bridge structure  41 . The bridge structure  41  is made of a conductive material, for example, a metal material. The bridge structure  41  is located within the bezel  12 . 
     In this embodiment, the bridge structure  41  is disposed on the circuit board  30 , and the bridge structure  41  is insulated from the ground plane of the circuit board  30 . In an embodiment, a surface that is of the circuit board  30  and that faces the screen  20  is a ground plane. In this case, the bridge structure  41  is disposed on a surface that is of the circuit board  30  and that is away from the screen  20 . In this way, the bridge structure  41  may be insulated from the ground plane of the circuit board  30 . A structural form of the bridge structure  41  may be a flexible circuit board, a laser direct structuring (LDS) metal, an in-mold injection molding metal, or a printed circuit board cabling. In still another embodiment, a support is disposed on a surface that is of the circuit board  30  and that faces the screen  20 . The support is made of an insulation material, such as plastic. In this case, the support is insulated from the ground plane of the circuit board  30 . Then, the bridge structure  41  is disposed on the support. In this way, the bridge structure  41  may also be insulated from the ground plane of the circuit board  30 . 
     In this embodiment, the bridge structure  41  is a symmetric pattern. For example, the bridge structure  41  is in a shape of “IT”. In this case, symmetry of the bridge structure  41  is good, that is, symmetry of the slot antenna  40  is good. The bridge structure  41  has a simple structure and is easy to prepare. In another embodiment, the bridge structure  41  may alternatively be in an arc shape. In addition, the bridge structure  41  may also alternatively be in an asymmetric pattern shape. 
     In addition, an end of the bridge structure  41  is connected to the second radiator  102 . In an embodiment, one end of the bridge structure  41  is connected to the second radiator  102  through a dome. The other end of the bridge structure  41  is connected to the third radiator  103 . In an embodiment, the other end of the bridge structure  41  is connected to the third radiator  103  through a dome. In this case, a position at which the second radiator  102  is connected to the bridge structure  41  is a first feed point of the slot antenna  40 . A position at which the third radiator  103  is connected to the bridge structure  41  is a second feed point of the slot antenna  40 . 
     Refer to  FIG.  8    and  FIG.  9    again. The slot antenna  40  further includes a first feed circuit  42 . A negative electrode of the first feed circuit  42  is grounded, that is, the negative electrode of the first feed circuit  42  is electrically connected to the ground plane of the circuit board  30 . A positive electrode of the first feed circuit  42  is electrically connected to a middle portion of the bridge structure  41 .  FIG.  8    simply shows directions of the positive electrode and the negative electrode of the first feed circuit  42  by using arrows. An arrow direction is from the negative electrode to the positive electrode. It may be understood that this feed manner is a symmetric feed manner. 
     In an embodiment, the first feed circuit  42  includes a feed source and a capacitor. A negative electrode of the feed source is electrically connected to the ground plane of the circuit board  30 . A positive electrode of the feed source is electrically connected to one side of the capacitor. The other side of the capacitor is electrically connected to the middle portion of the bridge structure  41 . In other words, the capacitor is electrically connected to the positive electrode of the feed source and the middle portion of the bridge structure  41 . 
     Second, the following specifically describes an anti-symmetric feed manner with reference to related accompanying drawings. 
     Refer to  FIG.  8    and  FIG.  9    again. The wire antenna  50  includes a first conductive segment  51 , a third conductive segment  52 , and a first matching circuit  56 . The first conductive segment  51  and the third conductive segment  52  are both made of a conductive material, for example, a metal material. The first conductive segment  51 , the third conductive segment  52 , and the first matching circuit  56  are located within the bezel  12 . 
     In addition, the first conductive segment  51  includes a first end  511  and a second end  512  disposed away from the first end  511 . The first end  511  of the first conductive segment  51  is electrically connected to the ground plane of the circuit board  30 , that is, the first end  511  is grounded. It may be understood that, for a manner in which the first end  511  is electrically connected to the ground plane of the circuit board  30 , refer to the manner in which the first metal segment  1231  is electrically connected to the ground plane of the circuit board  30 . Details are not described herein. 
     In addition, the second end  512  of the first conductive segment  51  is electrically connected to the third conductive segment  52  through the first matching circuit  56 . It may be understood that the first matching circuit  56  is configured to match an antenna impedance. The first matching circuit  56  may include at least one circuit component. For example, the first matching circuit  56  may include at least one of a resistor, an inductor, or a capacitor that is used as a lumped element. For example, the first matching circuit  56  may include at least one of an inductor or a capacitor that is used as a distributed element. In another embodiment, the second end  512  may alternatively be directly electrically connected to the third conductive segment  52 . 
     In addition, an end portion that is of the third conductive segment  52  and that is away from the first matching circuit  56  is connected to the first radiator  101 . In an embodiment, an end portion that is of the third conductive segment  52  and that is away from the first matching circuit  56  is connected to the first radiator  101  through a dome. In this case, a position at which the first radiator  101  is connected to the third conductive segment  52  is the first feed point. 
     In this embodiment, the first conductive segment  51 , the third conductive segment  52 , and the first matching circuit  56  are disposed on the ground plane of the circuit board  30 , and the first conductive segment  51 , the third conductive segment  52 , and the first matching circuit  56  are all insulated from the ground plane of the circuit board  30 . 
     In an embodiment, a ground plane is disposed on a surface that is of the circuit board  30  and that faces the screen  20 . In this case, a support is disposed on a surface that is of the circuit board  30  and that faces the screen  20 . The support is made of an insulation material, such as plastic. Then, the first conductive segment  51  is disposed on the support. In addition, the third conductive segment  52  is disposed on a surface that is of the circuit board  30  and that is away from the screen  20 . Further, a hollow region is disposed on the circuit board  30 , and the first matching circuit  56  is disposed in the hollow region. It may be understood that, because the first conductive segment  51  and the third conductive segment  52  are located on two opposite surfaces of the circuit board  30  (that is, there is a height difference between the first conductive segment  51  and the third conductive segment  52  in a Z direction),  FIG.  8    simply shows the third conductive segment  52  by using a solid line, the first conductive segment  51  is simply illustrated by using a dashed line. In this way, the first conductive segment  51 , the third conductive segment  52 , and the first matching circuit  56  may also be insulated from the ground plane of the circuit board  30 . In addition, structural forms of the first conductive segment  51  and the third conductive segment  52  may be a flexible circuit board, a laser direct structuring metal, an in-mold injection molding metal, or a printed circuit board cabling. 
     In another embodiment, the first conductive segment  51 , the third conductive segment  52 , and the first matching circuit  56  are disposed on a surface that is of the circuit board  30  and that is away from the screen  20 . A hollow region is disposed on the circuit board  30 , so that the first end  511  of the first conductive segment  51  can be electrically connected to the ground plane of the circuit board  30  through the hollow region. In this way, the first conductive segment  51 , the third conductive segment  52 , and the first matching circuit  56  may all be insulated from the ground plane of the circuit board  30 . In addition, structural forms of the first conductive segment  51  and the third conductive segment  52  may be a flexible circuit board, a laser direct structuring metal, an in-mold injection molding metal, or a printed circuit board cabling. 
     Refer to  FIG.  4    and  FIG.  5    again. The wire antenna  50  further includes a second conductive segment  53 , a fourth conductive segment  54 , and a second matching circuit  57 . The second conductive segment  53  and the fourth conductive segment  54  are both made of a conductive material, for example, a metal material. The second conductive segment  53 , the fourth conductive segment  54 , and the second matching circuit  57  are located within the bezel  12 , that is, in an accommodating space  13 . In addition, for a disposition manner of the second conductive segment  53 , the fourth conductive segment  54 , and the second matching circuit  57 , refer to a disposition manner of the first conductive segment  51 , the third conductive segment  52 , and the first matching circuit  56 . Details are not described herein. In this case, there is a height difference between the second conductive segment  53  and the fourth conductive segment  54  in the Z direction. 
     In addition, the second conductive segment  53  includes a third end  531  and a fourth end  532  disposed away from the third end  531 . The third end  531  of the second conductive segment  53  is electrically connected to the ground plane of the circuit board  30 , that is, the first end  511  is grounded. It may be understood that, for a manner in which the third end  531  is electrically connected to the ground plane of the circuit board  30 , refer to the manner in which the first metal segment  1231  is electrically connected to the ground plane of the circuit board  30 . Details are not described herein. 
     In addition, the fourth end  532  of the second conductive segment  53  is electrically connected to the fourth conductive segment  54  through the second matching circuit  57 . It may be understood that the second matching circuit  57  is configured to match an antenna impedance. The second matching circuit  57  may include at least one circuit component. For example, the second matching circuit  57  may include at least one of a resistor, an inductor, or a capacitor that is used as a lumped element. For example, the second matching circuit  57  may include at least one of an inductor or a capacitor that is used as a distributed element. In another embodiment, the fourth end  532  may alternatively be directly electrically connected to the fourth conductive segment  54 . 
     In addition, an end that is of the fourth conductive segment  54  and that is away from the second conductive segment  53  is connected to the fourth radiator  104 . In an embodiment, an end that is of the fourth conductive segment  54  and that is away from the second conductive segment  53  is connected to the fourth radiator  104  through a dome. In this case, a position at which the fourth radiator  104  is connected to the fourth conductive segment  54  is a second feed point. 
     In this embodiment, the first conductive segment  51  and the second conductive segment  53  are two symmetrical parallel conducting wires. In an embodiment, the first conductive segment  51  is in a “|” shape. The second conductive segment  53  is also in a “|” shape. In this case, the first conductive segment  51  and the second conductive segment  53  have good symmetry, that is, the wire antenna  50  has good structural symmetry. The first conductive segment  51  and the second conductive segment  53  are simple in structure and are easy to prepare. In another embodiment, the first conductive segment  51  may alternatively be in an arc shape. The second conductive segment  53  may also be in an arc shape. The first conductive segment  51  and the second conductive segment  53  may also be in an asymmetric pattern shape. 
     In this embodiment, the third conductive segment  52  and the fourth conductive segment  54  are in a symmetrical pattern shape. In an embodiment, the third conductive segment  52  is in a “┌” shape. The fourth conductive segment  54  is in a “┐” shape. In this case, the third conductive segment  52  and the fourth conductive segment  54  have good symmetry, that is, the wire antenna  50  has good structural symmetry. The third conductive segment  52  and the fourth conductive segment  54  are simple in structure and are easy to prepare. In another embodiment, the third conductive segment  52  may also be in an arc shape. The fourth conductive segment  54  may also be in an arc shape. The third conductive segment  52  and the fourth conductive segment  54  may also be in an asymmetric pattern shape. 
     In addition, the wire antenna  50  further includes a second feed circuit  55 . A negative electrode of the second feed circuit  55  is electrically connected between the first end  511  and the second end  512  of the first conductive segment  51 . A positive electrode of the second feed circuit  55  is electrically connected between the third end  531  and the fourth end  532  of the second conductive segment  53 . In this embodiment, the negative electrode of the second feed circuit  55  is electrically connected to a middle position between the first end  511  and the second end  512 . The positive electrode of the second feed circuit  55  is electrically connected to a middle position between the third end  531  and the fourth end  532 . In this case, the structure of the wire antenna  50  has good symmetry. In another embodiment, the negative electrode of the second feed circuit  55  may alternatively deviate from the middle position between the first end  511  and the second end  512 . The positive electrode of the second feed circuit  55  may alternatively deviate from the middle position between the third end  531  and the fourth end  532 . In addition,  FIG.  8    simply shows directions of the positive electrode and the negative electrode of the second feed circuit  55  by using arrows. An arrow direction is from the negative electrode to the positive electrode, that is, from left to right. It may be understood that this feed manner is an anti-symmetric feed manner. In addition, in another embodiment, when locations of the first metal segment  1231  and the second metal segment  1233  are exchanged, the positive electrode and the negative electrode of the second feed circuit  55  face from right to left. 
     It may be understood that, with reference to the foregoing and related accompanying drawings, this embodiment specifically describes the antenna structure including the slot antenna  40  and the wire antenna  50 , and two feed manners of the antenna structure: a symmetric feed manner and an anti-symmetric feed manner. The following describes antenna performance of such an antenna structure in detail with reference to related accompanying drawings. 
     The following specifically describes specific parameters of some related components of the electronic device  100 . Specifically, a thickness of the bezel  12  of the electronic device  100  is approximately 4 millimeters, and a width of the bezel  12  of the electronic device  100  is approximately 3 millimeters. A width of a clearance region between the bezel  12  of the electronic device  100  and the ground plane of the circuit board  30  is approximately 1 millimeter, that is, widths of the first gap  31  and the second gap  32  are both approximately 1 millimeter. A width of the first insulation segment  1232  is approximately 2 millimeters. A dielectric constant of an insulation material used by the first insulation segment  1232 , the second insulation segment  1237 , and the third insulation segment  1239  is 3.0, and a loss angle is 0.01. In addition, a dielectric constant of an insulation material filled in the first gap  31  and the second gap  32  is also 3.0, and a loss angle is also 0.01. 
       FIG.  10    is a curve graph of a reflection coefficient of the antenna structure shown in  FIG.  9   . In  FIG.  10   , a solid line represents a curve of a reflection coefficient of the antenna structure in an anti-symmetrical feed manner. A dashed line in  FIG.  10    represents a curve of a reflection coefficient of the antenna structure in a symmetric feed manner. In  FIG.  10   , a horizontal coordinate represents a frequency (unit: GHz), and a vertical coordinate represents a reflection coefficient (unit: dB). 
     It can be seen from the solid line in  FIG.  10    that the antenna structure may generate three resonance modes in the anti-symmetric feed manner, and resonance frequencies of the three resonance modes are separately near 1.84 GHz (a position indicated by a solid line arrow  1 ), near 2.07 GHz (a position indicated by a solid line arrow  2 ), and near 2.49 GHz (a position indicated by a solid line arrow  3 ). In addition, it can be learned from dashed lines in  FIG.  10    that the antenna structure may generate two resonance modes in the symmetric feed manner. Resonance frequencies of the two resonance modes are respectively near 2.04 GHz (a position indicated by a dashed arrow  1 ) and near 2.21 GHz (a position indicated by a dashed arrow  2 ). It may be understood that a frequency band 0 GHz to 3 GHz is used as an example for description in this embodiment. Certainly, in another embodiment, a related parameter (for example, a length of the second radiator  102  of the slot antenna  40 , a length of the third radiator  103  of the slot antenna  40 , a length of the first radiator  101  of the wire antenna  50 , or a length of the fourth radiator  104  of the wire antenna  50 ) is adjusted, therefore, in another frequency band (for example, 3 GHz to 6 GHz, 6 GHz to 8 GHz, or 8 GHz to 11 GHz), the antenna structure may alternatively generate five resonance modes, that is, generate five resonance frequencies. 
     It may be understood that, an antenna structure including the slot antenna  40  and the wire antenna  50  is disposed, and two feed manners are used, so that the antenna structure may be excited to generate five resonance modes. This implements that an antenna covers a plurality of frequency bands. 
     In addition,  FIG.  11    is an efficiency curve graph of the antenna structure shown in  FIG.  9   . In  FIG.  11   , a solid line  1  (a curve indicated by a solid line arrow  1 ) represents a system efficiency curve of the antenna structure in an anti-symmetric feed manner. In  FIG.  11   , a solid line  2  (a curve indicated by a solid line arrow  2 ) represents a system efficiency curve of the antenna structure in a symmetric feed manner. In  FIG.  11   , a dashed line  1  (a curve indicated by a dashed arrow  1 ) represents a radiation efficiency curve of the antenna structure in the anti-symmetric feed manner. In  FIG.  11   , a dashed line  2  (a curve indicated by a dashed arrow  2 ) represents a radiation efficiency curve of the antenna structure in the symmetric feed manner. In  FIG.  11   , a horizontal coordinate represents a frequency (unit: GHz), and a vertical coordinate represents efficiency (unit: dB). It can be learned from  FIG.  11    that, an excitation resonance signal generated by the antenna structure in the anti-symmetric feed manner expands the bandwidth of the antenna structure. In addition, an excitation resonance signal generated by the antenna structure in the symmetric feed manner expands the bandwidth of the antenna structure. Therefore, antenna performance of the antenna structure is good. 
       FIG.  12    is an isolation curve graph of the antenna structure shown in  FIG.  9   . In  FIG.  12   , a horizontal coordinate represents a frequency (unit: GHz), and a vertical coordinate represents efficiency (unit: dB). It can be learned from  FIG.  12    that, isolation between an excitation resonance signal generated by the antenna structure in an anti-symmetric feed manner and an excitation resonance signal generated by the antenna structure in a symmetric feed manner may reach more than 16 dB (a position indicated by an arrow). Therefore, antenna performance of the antenna structure is good. 
     With reference to  FIG.  13   a    to  FIG.  13   e   , the following specifically describes schematic diagrams of flow directions of a current and an electric field of an antenna structure at five resonance frequencies.  FIG.  13   a    is a schematic diagram of flow directions of a current and an electric field of the antenna structure shown in  FIG.  9    under a signal with a frequency of 1.84 GHz.  FIG.  13   b    is a schematic diagram of flow directions of another current and electric field of the antenna structure shown in  FIG.  9    under a signal with a frequency of 2.07 GHz.  FIG.  13   c    is a schematic diagram of flow directions of still another current and electric field of the antenna structure shown in  FIG.  9    under a signal with a frequency of 2.49 GHz.  FIG.  13   d    is a schematic diagram of flow directions of yet another current and electric field of the antenna structure shown in  FIG.  9    under a signal with a frequency of 2.04 GHz.  FIG.  13   e    is a schematic diagram of flow directions of still yet another current and electric field of the antenna structure shown in  FIG.  9    under a signal with a frequency of 2.21 GHz. 
     Refer to  FIG.  13   a   . A first-type current is generated in the antenna structure. A current flow direction of the first-type current has two portions: One portion is a current that is transmitted from the ground end of the third radiator  103  to the open end of the third radiator  103 , and the other portion is a current that is transmitted from the open end of the second radiator  102  to the ground end of the second radiator  102 . In addition, directions of electric fields on respective sides of the second radiator  102  and the third radiator  103  are different. 
     Refer to  FIG.  13   b   . A second-type current is generated in the antenna structure. A flow direction of the second-type current includes two portions: One portion is a current that flows along the first conductive segment  51 , the third conductive segment  52 , the ground end of the first radiator  101 , and the second radiator  102 , and the other portion is a current that flows along the third radiator  103 , the fourth radiator  104 , the fourth conductive segment  54 , and the second conductive segment  53 . The flow direction of the second-type current is roughly in a ring shape. In addition, directions of electric fields on respective sides of the second radiator  102  and the third radiator  103  are different. In addition, directions of electric fields on two sides of the first conductive segment  51  and the third conductive segment  52  are also opposite. Directions of electric fields on two sides of the fourth conductive segment  54  and the second conductive segment  53  are also opposite. 
     Refer to  FIG.  13   c   . A third-type current is generated in the antenna structure. The flow direction of the third-type current has two portions: One portion is a current that flows along the open end of the fourth radiator  104 , the ground end of the third radiator  103 , and the open end of the third radiator  103 , and the other portion is a current that flows along the open end of the second radiator  102 , the ground end of the second radiator  102 , and the open end of the first radiator  101 . In addition, directions of electric fields on a side of the first radiator  101 , a side of the second radiator  102 , a side of the third radiator  103  and a side of the fourth radiator  104  are the same. In addition, directions of electric fields on respective sides of the first radiator  101 , the second radiator  102 , the third radiator  103 , and the fourth radiator  104  are different. 
     Refer to  FIG.  13   d   . A fourth-type current is generated in the antenna structure. A specific flow direction of the fourth-type current includes two portions. One portion is a current that flows along the open end of the fourth radiator  104 , the ground end of the third radiator  103 , and the open end of the third radiator  103 , and the other portion is a current that flows along the open end of the first radiator  101 , the ground end of the first radiator  101 , and the open end of the second radiator  102 . In addition, directions of electric fields on respective sides of the first radiator  101 , the second radiator  102 , the third radiator  103 , and the fourth radiator  104  are the same. 
     Refer to  FIG.  13   e   . A fifth-type current is generated in the antenna structure. A specific flow direction of the fifth-type current includes four portions. A first portion is a current that flows from the feed end of the bridge structure  41  to the second radiator  102 , and a second portion is a current that flows from the ground end of the second radiator  102  to the open end of the second radiator  102 . A third portion is a current that flows from the feed end of the bridge structure  41  to the third radiator  103 . A fourth portion is a current that flows from the open end of the third radiator  103  to the ground end of the third radiator  103 . In addition, directions of electric fields on respective sides of the second radiator  102  and the third radiator  103  are the same. 
     The following specifically describes schematic diagrams of radiation directions of an antenna structure at five resonance frequencies with reference to  FIG.  13   f    to  FIG.  13   j   .  FIG.  13   f    is a schematic diagram of a radiation direction of the antenna structure shown in  FIG.  9    under a signal with a frequency of 1.84 GHz.  FIG.  13   g    is a schematic diagram of another radiation direction of the antenna structure shown in  FIG.  9    under a signal with a frequency of 2.07 GHz.  FIG.  13   h    is a schematic diagram of still another radiation direction of the antenna structure shown in  FIG.  9    under a signal with a frequency of 2.49 GHz.  FIG.  13   i    is a schematic diagram of yet another radiation direction of the antenna structure shown in  FIG.  9    under a signal with a frequency of 2.04 GHz.  FIG.  13   j    is a schematic diagram of still yet another radiation direction of the antenna structure shown in  FIG.  9    under a signal with a frequency of 2.21 GHz. 
     Refer to  FIG.  13   f    to  FIG.  13   h   . An antenna signal generated by the antenna structure in  FIG.  13   f    to  FIG.  13   h    in an anti-symmetric feed manner has strong radiation intensity in a radiation direction as a Y-axis direction, and has weak radiation intensity in a radiation direction as an X-axis direction. To be specific, a common mode slot antenna with a frequency of 1.84 GHz has strong radiation in the Y-axis direction, a common mode slot antenna with a frequency of 2.07 GHz has strong radiation in the Y-axis direction, and a differential mode wire antenna with a frequency of 2.49 GHz has strong radiation in the Y-axis direction. 
     Refer to  FIG.  13   i    to  FIG.  13   j   . An antenna signal generated by the antenna structure in  FIG.  13   i    to  FIG.  13   j    in a symmetric feed manner has strong radiation intensity in a radiation direction as a Y-axis direction, and has weak radiation intensity in a radiation direction as an X-axis direction. To be specific, a common mode wire antenna with a frequency of 2.04 GHz has strong radiation in the X-axis direction, and a differential mode slot antenna with a frequency of 2.21 GHz has strong radiation in the X-axis direction. 
     In addition, it can be learned from  FIG.  13   f    to  FIG.  13   j    that in a same frequency band (for example, 0 GHz to 3 GHz in this embodiment), an excitation resonance signal generated by the antenna structure in the anti-symmetric feed manner differs greatly from an excitation resonance signal generated by the antenna structure in the symmetric feed manner in terms of directions. In this case, a radiation range of the antenna structure is wide. 
     In addition, it can be calculated, based on radiation patterns of two antennas in  FIG.  13   f    to  FIG.  13   j   , that ECCs of antenna signals generated in the anti-symmetric feed manner and antenna signals generated in the symmetric feed manner are both less than 0.1. In other words, the ECC of the antenna structure in this embodiment is small. 
     In this embodiment, an antenna structure including the slot antenna  40  and the wire antenna  50  is disposed, and two feed manners are used, so that the antenna structure may be excited to generate four antenna resonance modes. A differential mode wire antenna has two resonance modes. This implements that an antenna covers a plurality of frequency bands. 
     In addition, isolation between an excitation resonance signal generated by the antenna structure in the anti-symmetric feed manner and an excitation resonance signal generated by the antenna structure in the symmetric feed manner may reach more than 16 dB, so that antenna performance of the antenna structure is good 
     In Extended Embodiment 1, technical content that is the same as that in the first embodiment is not described again.  FIG.  14    is a schematic diagram of another embodiment of an antenna structure of the electronic device shown in  FIG.  8   . The slot antenna  40  further includes a first tuning circuit  44  and a second tuning circuit  45 . A portion of the first tuning circuit  44  is electrically connected to an end portion that is of the first metal segment  1231  and that faces the second metal segment  1233 , and a portion of the first tuning circuit  44  is grounded. In other words, the open end of the second radiator  102  is grounded through the first tuning circuit  44 . The first tuning circuit  44  is configured to adjust an electrical length of the second radiator  102 . A portion of the second tuning circuit  45  is electrically connected to an end portion that is of the second metal segment  1233  and that faces the first metal segment  1231 , and a portion of the second tuning circuit  45  is grounded. In other words, the open end of the third radiator  103  is grounded through the second tuning circuit  45 . The second tuning circuit  45  is configured to adjust an electrical length of the third radiator  103 . In an embodiment, the first tuning circuit  44  is a capacitor. In this case, the electrical length of the second radiator  102  may be effectively adjusted by setting an operating parameter of the capacitor, so that when the electrical length of the second radiator  102  is reduced, and the slot antenna  40  may be miniaturized. In addition, the second tuning circuit  45  may also be a capacitor. 
     In Extended Embodiment 2, technical content that is the same as that in the first embodiment is not described again.  FIG.  15    is a schematic diagram of still another embodiment of an antenna structure of the electronic device shown in  FIG.  8   . The wire antenna  50  further includes a third tuning circuit  58 . The third tuning circuit  58  is electrically connected between an end portion that is away from the first metal segment  1231  and that is of the third conductive segment  52  and an end portion that is of the fourth conductive segment  54  and that is away from the second metal segment  1233 . The third tuning circuit  58  is configured to adjust an electrical length of the first radiator  101  and an electrical length of the fourth radiator  104 . For example, the third tuning circuit  58  is a capacitor. The capacitor is electrically connected between the third conductive segment  52  and the fourth conductive segment  54 . In this case, the electrical length of the first radiator  101  and the electrical length of the fourth radiator  104  may be reduced by adjusting a parameter of the capacitor, so that when the electrical length of the first radiator  101  and the electrical length of the fourth radiator  104  are reduced, and the wire antenna  50  may be miniaturized. 
     It may be understood that, the antenna structure in this embodiment may also include the first tuning circuit  44  and the second tuning circuit  45  of the antenna structure in Extended Embodiment 1. For details, refer to Extended Embodiment 1. 
     In Extended Embodiment 3, technical content that is the same as that in the first embodiment is not described again: The bezel  12  is made of an insulation material. In this case, the first short bezel  123  is also made of an insulation material. In this case, the first metal segment  1231 , the first insulation segment  1232 , and the second metal segment  1233  are successively formed on an inner side of the first short bezel  123 . Structural forms of the first metal segment  1231  and the second metal segment  1233  may be a flexible circuit board, a laser direct structuring (LDS) metal, an in-mold injection molding metal, or a printed circuit board cabling. In addition, the first insulation segment  1232  may be formed by filling a gap between the first metal segment  1231  and the second metal segment  1233  with an insulation material. For example, the insulation material is a material such as polymer, glass, or ceramic, or a combination of these materials. In another embodiment, the first insulation segment  1232  may alternatively be a gap, that is, the gap is not filled with an insulation material. 
     In a second embodiment, technical content that is the same as that in the first embodiment is not described again. Another antenna structure including a slot antenna and a wire antenna is disposed, and two feed manners are used, so that the antenna structure is excited to generate four antenna modes: a common mode slot antenna, a differential mode slot antenna, a common mode wire antenna, and a differential mode wire antenna. The common mode wire antenna has two resonance modes. The common mode slot antenna also has two resonance modes. In this way, in this embodiment, an antenna structure including the slot antenna  40  and the wire antenna  50  may be excited to generate a plurality of resonance modes, so that the antenna may cover a plurality of frequency bands. 
     This embodiment is described by using an example in which a radiator of an antenna structure including a slot antenna and a wire antenna is a portion of the first short bezel  123 . In another embodiment, a radiator of an antenna structure including a slot antenna and a wire antenna may alternatively be a portion of the first long bezel  121 , a portion of the second long bezel  122 , or a portion of the second short bezel  124 . 
     First, a structure of a radiator of a slot antenna and a structure of a radiator of a wire antenna are described in detail with reference to related accompanying drawings. 
       FIG.  16    is an enlarged schematic diagram of another embodiment at B of the electronic device shown in  FIG.  7   . 
     The first short bezel  123  includes a first metal segment  1231 , a first insulation segment  1232 , a second metal segment  1233 , a second insulation segment  1234 , and a third metal segment  1235  that are successively connected. In other words, the first insulation segment  1232  is located between the first metal segment  1231  and the second metal segment  1233 . The second insulation segment  1234  is located between the second metal segment  1233  and the third metal segment  1235 . 
     In addition, the second metal segment  1233  includes a first portion  1 , a first ground portion  2 , and a second portion  3 . The first portion  1  is connected to the first insulation segment  1232 . The second portion  3  is connected to the second insulation segment  1234 . It may be understood that a fourth gap is formed between the first metal segment  1231  and the first portion  1 . The first insulation segment  1232  may be formed by filling the fourth gap with an insulation material. For example, the insulation material may be a material such as polymer, glass, or ceramic, or a combination of these materials. In another embodiment, the fourth gap may be filled with air, that is, the fourth gap is not filled with any insulation material. In addition, a fifth gap is formed between the second portion  3  and the third metal segment  1235 . The second insulation segment  1234  may be formed by filling the fifth gap with an insulation material. For example, the insulation material may be a material such as polymer, glass, or ceramic, or a combination of these materials. 
     In addition, for a grounding manner of the first ground portion  2  in this embodiment, refer to the grounding manner of the first ground portion  2  in the first embodiment, and details are not described herein again. In addition, an end portion that is of the first metal segment  1231  and that is away from the first insulation segment  1232  is grounded. An end portion that is of the third metal segment  1235  and that is away from the second insulation segment  1234  is grounded. For a grounding manner of the first metal segment  1231  and a grounding manner of the third metal segment  1235 , refer to the grounding manner of the first ground portion  2  in the first embodiment, and details are not described herein again. 
     In addition, a first gap  31  is disposed between the first metal segment  1231  and the ground plane of the circuit board  30 . The first gap  31  connects the first metal segment  1231  and the first portion  1  to form a fourth gap, and the second portion  3  and the third metal segment  1235  to form a fifth gap. In an embodiment, the first gap  31  may be filled with an insulation material. For example, the first gap  31  may be filled with a material such as polymer, glass, or ceramic, or a combination of these materials. In another embodiment, the first gap  31  may be filled with air, that is, the first gap  31  is not filled with any insulation material. 
     In addition, a second gap  32  is disposed between the second metal segment  1233  and the ground plane of the circuit board  30 . The second gap  32  is connected to the first gap  31 . The second gap  32  connects the first metal segment  1231  and the first portion  1  to form a fourth gap, and the second portion  3  and the third metal segment  1235  to form a fifth gap. For a disposition manner of the second gap  32 , refer to the disposition manner of the first gap  31 . Details are not described herein. 
     In addition, a third gap  33  is disposed between the third metal segment  1235  and the ground plane of the circuit board  30 . The third gap  33  is connected to the first gap  31  and the second gap  32 . The third gap  33  is connected to the first gap  31 . The second gap  32  connects the first metal segment  1231  and the first portion  1  to form a fourth gap, and the second portion  3  and the third metal segment  1235  to form a fifth gap. For a disposition manner of the third gap  33 , refer to the disposition manner of the first gap  31 . Details are not described herein. 
     Refer to  FIG.  17   , with reference to  FIG.  16   ,  FIG.  17    is a schematic diagram of an embodiment of an antenna structure of the electronic device shown in  FIG.  16   . The first portion  1  and the first ground portion  2  form the second radiator  102 . The second portion  3  and the first ground portion  2  form the third radiator  103 . The second radiator  102  and the third radiator  103  form a radiator of the wire antenna  50 . 
     In addition, the first metal segment  1231  forms the first radiator  101 . The third metal segment  1235  forms the fourth radiator  104 . The first radiator  101  and the fourth radiator  104  form a radiator of the slot antenna  40 . 
     Second, for a feed manner of the wire antenna  50  in this embodiment, refer to the feed manner of the slot antenna  40  in the first embodiment. Details are not described herein. 
     In addition, for a feed manner of the slot antenna  40  in this embodiment, refer to the feed manner of the wire antenna  50  in the first embodiment. Details are not described herein. 
     In this embodiment, a length of the second radiator  102  is equal to a length of the third radiator  103 , and both the length of the second radiator  102  and the length of the third radiator  103  are ¼ wavelength. Wavelength  1  may be obtained through calculation based on operating frequencies f1 of the second radiator  102  and the third radiator  103 . Specifically, the wavelength  1  of a radiation signal in the air may be calculated as follows: Wavelength=Speed of light/f1. The wavelength  1  of the radiation signal in a medium may be calculated as follows: Wavelength=(Speed of light/√ε)/f1, where ε is a relative dielectric constant of the medium. 
     A length of the first radiator  101  is equal to a length of the fourth radiator  104 , and the length of the first radiator  101  and the length of the fourth radiator  104  are ¼ wavelength. The wavelength  1  may be obtained through calculation based on operating frequencies f1 of the first radiator  101  and the fourth radiator  104 . Specifically, the wavelength  1  of a radiation signal in the air may be calculated as follows: Wavelength=Speed of light/f1. The wavelength  1  of the radiation signal in a medium may be calculated as follows: Wavelength=(Speed of light/√ε)/f1, where ε is a relative dielectric constant of the medium. 
     In another embodiment, the length of the second radiator  102  may be alternatively unequal to the length of the third radiator  103 . The length of the first radiator  101  may also be unequal to the length of the fourth radiator  104 . 
     The foregoing specifically describes an antenna structure including the wire antenna  50  and the slot antenna  40 , and two feed manners of the antenna structure: a symmetric feed manner and an anti-symmetric feed manner. The following describes antenna performance of such an antenna structure in detail with reference to related accompanying drawings. 
     In addition, the following specifically describes specific parameters of some related components of the electronic device  100 . A thickness of the bezel  12  of the electronic device  100  is approximately 4 millimeters, and a width of the bezel  12  of the electronic device  100  is approximately 3 millimeters. A width of a clearance region between the bezel  12  of the electronic device  100  and the ground plane of the circuit board  30  is approximately 1 millimeter, that is, widths of the first gap  31 , the second gap  32 , and the third gap  33  are all approximately 1 millimeter. A width of the first insulation segment  1232  and a width of the second insulation segment  1234  are approximately 2 millimeters. A dielectric constant of an insulation material used by the first insulation segment  1232  and the second insulation segment  1234  is 3.0, and a loss angle is 0.01. In addition, a dielectric constant of an insulation material filled in the first gap  31 , the second gap  32 , and the third gap  33  is also 3.0, and a loss angle is also 0.01. 
       FIG.  18    is a curve graph of a reflection coefficient of the antenna structure shown in  FIG.  17   . In  FIG.  18   , a curve indicated by a curve arrow  1  represents a curve of a reflection coefficient of the antenna structure in an anti-symmetrical feed manner. A curve indicated by a curve arrow  2  in  FIG.  18    is a reflection coefficient of the antenna structure in a symmetric feed manner. In  FIG.  18   , a horizontal coordinate represents a frequency (unit: GHz), and a vertical coordinate represents a reflection coefficient (unit: dB). 
     It can be learned from a curve indicated by the curve arrow  1  in  FIG.  18    that the antenna structure may generate three resonance modes in the anti-symmetric feed manner, and resonance frequencies of the three resonance modes are separately near 1.75 GHz (a position indicated by a solid line arrow  1 ), near 2.36 GHz (a position indicated by a solid line arrow  2 ), and near 2.79 GHz (a position indicated by a solid line arrow  3 ). In addition, it can be learned from the curve indicated by the curve arrow  2  in  FIG.  18    that the antenna structure may generate three resonance modes in the symmetric feed manner. Resonance frequencies of the three resonance modes are respectively near 1.87 GHz (a position indicated by a dashed arrow  1 ), near 2.36 GHz (a position indicated by a dashed arrow  2 ), and near 2.87 GHz (a position indicated by a dashed arrow  3 ). It may be understood that a frequency band 0 GHz to 3 GHz is used as an example for description in this embodiment. Certainly, in another embodiment, a related parameter (for example, a length of the second radiator  102  of the wire antenna  50 , a length of the third radiator  103  of the wire antenna  50 , a length of the first radiator  101  of the slot antenna  40 , or a length of the fourth radiator  104  of the wire antenna  50 ) is adjusted, therefore, in another frequency band (for example, 3 GHz to 6 GHz, 6 GHz to 8 GHz, or 8 GHz to 11 GHz), the antenna structure may alternatively generate six resonance modes, that is, generate six resonance frequencies. 
     In this embodiment, an antenna structure including the slot antenna  40  and the wire antenna  50  is disposed, and two feed manners are used, so that the antenna structure is excited to generate six resonance modes. This implements that an antenna covers a plurality of frequency bands. 
       FIG.  19    is an efficiency curve graph of the antenna structure shown in  FIG.  17   . In  FIG.  19   , a solid line  1  (a curve indicated by a solid line arrow  1 ) represents a system efficiency curve of the antenna structure in an anti-symmetric feed manner. In  FIG.  19   , a solid line  2  (a curve indicated by a solid line arrow  2 ) represents a system efficiency curve of the antenna structure in a symmetric feed manner. In  FIG.  19   , a dashed line  1  (a curve indicated by a dashed arrow  1 ) represents a radiation efficiency curve of the antenna structure in the anti-symmetric feed manner. In  FIG.  19   , a dashed line  2  (a curve indicated by a dashed arrow  2 ) represents a radiation efficiency curve of the antenna structure in the symmetric feed manner. In  FIG.  19   , a horizontal coordinate represents a frequency (unit: GHz), and a vertical coordinate represents efficiency (unit: dB). It can be learned from  FIG.  19    that, an excitation resonance signal generated by the antenna structure in the anti-symmetric feed manner expands the bandwidth of the antenna structure. In addition, an excitation resonance signal generated by the antenna structure in the symmetric feed manner expands the bandwidth of the antenna structure. Therefore, antenna performance of the antenna structure is good. 
       FIG.  20    is an isolation curve graph of the antenna structure shown in  FIG.  17   . In  FIG.  20   , a horizontal coordinate represents a frequency (unit: GHz), and a vertical coordinate represents efficiency (unit: dB). It can be learned from  FIG.  20    that, isolation between an excitation resonance signal generated by the antenna structure in an anti-symmetric feed manner and an excitation resonance signal generated by the antenna structure in a symmetric feed manner may reach more than 22 dB (a position indicated by an arrow). Therefore, antenna performance of the antenna structure is good. 
     With reference to  FIG.  21   a    to  FIG.  21   f   , the following specifically describes schematic diagrams of flow directions of a current and an electric field of an antenna structure at six resonance frequencies.  FIG.  21   a    is a schematic diagram of flow directions of a current and an electric field of the antenna structure shown in  FIG.  17    under a signal with a frequency of 1.75 GHz.  FIG.  21   b    is a schematic diagram of flow directions of another current and electric field of the antenna structure shown in  FIG.  17    under a signal with a frequency of 2.36 GHz.  FIG.  21   c    is a schematic diagram of flow directions of further another current and electric field of the antenna structure shown in  FIG.  17    under a signal with a frequency of 2.79 GHz.  FIG.  21   d    is a schematic diagram of flow directions of still another current and electric field of the antenna structure shown in  FIG.  17    under a signal with a frequency of 1.87 GHz.  FIG.  21   e    is a schematic diagram of flow directions of still yet another current and electric field of the antenna structure shown in  FIG.  17    under a signal with a frequency of 2.36 GHz.  FIG.  21   f    is a schematic diagram of flow directions of further still another current and electric field of the antenna structure shown in  FIG.  17    under a signal with a frequency of 2.87 GHz. 
     Refer to  FIG.  21   a   . A first-type current is generated in the antenna structure. A current flow direction of the first-type current has two portions: One portion is a current that is transmitted from the open end of the first radiator  101  to the ground end of the first radiator  101 . The other portion is a current that is transmitted from the ground end of the fourth radiator  104  to the open end of the fourth radiator  104 . In addition, directions of electric fields on respective sides of the first radiator  101  and the fourth radiator  104  are different. 
     Refer to  FIG.  21   b   . A second-type current is generated in the antenna structure. A current flow direction of the second-type current has three portions: One portion is a current that flows along the open end of the fourth radiator  104 , the fourth conductive segment  54 , the second conductive segment  53 , the first conductive segment  51 , the third conductive segment  52 , and the open end of the first radiator  101 . The other portion is a current that flows from the ground end of the first radiator  101  to the open end of the first radiator  101 . Still another portion is a current that flows from the open end of the fourth radiator  104  to the ground end of the fourth radiator  104 . In addition, directions of electric fields on respective sides of the first radiator  101  and the fourth radiator  104  are different. In addition, directions of electric fields on two sides of the first conductive segment  51  and the third conductive segment  52  are also opposite. Directions of electric fields on two sides of the fourth conductive segment  54  and the second conductive segment  53  are also opposite. 
     Refer to  FIG.  21   c   . A third-type current is generated in the antenna structure. A current flow direction of the third-type current is a flow along the open end of the third radiator  103 , the ground end of the second radiator  102 , and the open end of the second radiator  102 . In addition, directions of electric fields on respective sides of the third radiator  103  and the second radiator  102  are different. 
     Refer to  FIG.  21   d   . A fourth-type current is generated in the antenna structure. A current flow direction of the fourth-type current has two portions: One portion is a current that is transmitted from the open end of the first radiator  101  to the ground end of the first radiator  101 . The other portion is a current that is transmitted from the open end of the fourth radiator  104  to the ground end of the fourth radiator  104 . Directions of electric fields on respective sides of the first radiator  101  and the fourth radiator  104  are the same. 
     Refer to  FIG.  21   e   . A fifth-type current is generated in the antenna structure. A current flow direction of the fifth-type current has two portions. A first portion is a current that is transmitted from the ground end of the second radiator  102  to the open end of the second radiator  102 . A second portion is a current that is transmitted from the ground end of the third radiator  103  to the open end of the third radiator  103 . In addition, directions of electric fields on respective sides of the third radiator  103  and the second radiator  102  are the same. It may be understood that, a 2.36 GHz resonance mode mainly functions through the second radiator  102  and the third radiator  103 . 
     Refer to  FIG.  21   f    A sixth-type current is generated in the antenna structure. The specific flow direction includes four portions. A first portion is a current that flows from a left portion of the feed end of the bridge structure  41  to the feed end. The second portion is a current that flows from a right portion of the feed end of the bridge structure  41  to the feed end. The third portion is a current that flows from the bridge structure  41  to the open end of the second radiator  102 . The fourth portion is a current that flows from the bridge structure  41  to the open end of the third radiator  103 . In addition, directions of electric fields on respective sides of the third radiator  103  and the second radiator  102  are the same. It may be understood that, a 2.87 GHz resonance mode further functions through the bridge structure  41  in a symmetric feed manner in addition to the second radiator  102  and the third radiator  103 . 
     The following specifically describes schematic diagrams of radiation directions of an antenna structure at five resonance frequencies with reference to  FIG.  21   g    to  FIG.  21   l   .  FIG.  21   g    is a schematic diagram of a radiation direction of the antenna structure shown in  FIG.  17    under a signal with a frequency of 1.75 GHz.  FIG.  21   h    is a schematic diagram of another radiation direction of the antenna structure shown in  FIG.  17    under a signal with a frequency of 2.36 GHz.  FIG.  21   i    is a schematic diagram of still another radiation direction of the antenna structure shown in  FIG.  17    under a signal with a frequency of 2.79 GHz.  FIG.  21   j    is a schematic diagram of yet another radiation direction of the antenna structure shown in  FIG.  17    under a signal with a frequency of 1.87 GHz.  FIG.  21   k    is a schematic diagram of still yet another radiation direction of the antenna structure shown in  FIG.  17    under a signal with a frequency of 2.36 GHz.  FIG.  21   l    is a schematic diagram of further still another radiation direction of the antenna structure shown in  FIG.  17    under a signal with a frequency of 2.87 GHz. 
     Refer to  FIG.  21   g    to  FIG.  21   i   . An antenna signal generated by the antenna structure in  FIG.  21   g    to  FIG.  21   i    in an anti-symmetric feed manner has strong radiation intensity in a radiation direction as a Y-axis direction, and has weak radiation intensity in a radiation direction as an X-axis direction. To be specific, a common mode slot antenna with a frequency of 1.75 GHz has strong radiation in the Y-axis direction, a common mode slot antenna with a frequency of 2.36 GHz has strong radiation in the Y-axis direction, and a differential mode wire antenna with a frequency of 2.79 GHz has strong radiation in the Y-axis direction. 
     Refer to  FIG.  21   j    to  FIG.  21   l   . An antenna signal generated by the antenna structure in  FIG.  21   j    to  FIG.  21   l    in an anti-symmetric feed manner has strong radiation intensity in a radiation direction as a Y-axis direction, and has weak radiation intensity in a radiation direction as an X-axis direction. To be specific, a differential mode slot antenna with a frequency of 1.87 GHz has strong radiation intensity in the X-axis direction, a common mode wire antenna with a frequency of 2.36 GHz has strong radiation intensity in the X-axis direction, and a common mode wire antenna with a frequency of 2.87 GHz has strong radiation intensity in the X-axis direction. 
     In addition, it can be learned from  FIG.  13   f    to  FIG.  13   j    that in a same frequency band (for example, 0 GHz to 3 GHz in this embodiment), an excitation resonance signal generated by the antenna structure in the anti-symmetric feed manner differs greatly from an excitation resonance signal generated by the antenna structure in the symmetric feed manner in terms of directions. In this case, a radiation range of the antenna structure is wide. 
     In addition, it can be calculated, based on radiation patterns of two antennas in  FIG.  21   g    to  FIG.  21   l   , that ECCs of antenna signals generated in the anti-symmetric feed manner and antenna signals generated in the symmetric feed manner are both less than 0.1. In other words, the ECC of the antenna structure in this embodiment is small. 
     In this embodiment, an antenna structure including the slot antenna  40  and the wire antenna  50  is disposed, and two feed manners are used, so that the antenna structure is excited to generate six resonance modes, that is, generate six resonance frequencies. This implements that an antenna covers a plurality of frequency bands. 
     In addition, isolation between an excitation resonance signal generated by the antenna structure in the anti-symmetric feed manner and an excitation resonance signal generated by the antenna structure in the symmetric feed manner may reach more than 22 dB, so that antenna performance of the antenna structure is good. 
     In Extended Embodiment 1, technical content that is the same as that in the second embodiment is not described again.  FIG.  22    is a schematic diagram of another embodiment of an antenna structure of the electronic device shown in  FIG.  16   . The slot antenna  40  further includes a first tuning circuit  44  and a second tuning circuit  45 . One portion of the first tuning circuit  44  is connected to an end portion that is of the first radiator  101  and that faces the second radiator  102 , and the other portion is grounded. In other words, the open end of the first radiator  101  is grounded through the first tuning circuit  44 . The first tuning circuit  44  is configured to adjust an electrical length of the first radiator  101 . One portion of the second tuning circuit  45  is connected to an end portion that is of the fourth radiator  104  and that faces the third radiator  103 , and the other portion is grounded. In other words, the open end of the fourth radiator  104  is grounded through the second tuning circuit  45 . For example, the first tuning circuit  44  is a capacitor. The second tuning circuit  45  is also a capacitor. In this case, the electrical length of the first radiator  101  and the electrical length of the fourth radiator  104  may be effectively adjusted by setting an operating parameter of the capacitor, so that when the electrical length of the first radiator  101  and the electrical length of the fourth radiator  104  are reduced, the slot antenna  40  may be miniaturized. 
     In Extended Embodiment 2, technical content that is the same as that in the second embodiment is not described again: The bezel  12  is made of an insulation material. In this case, the first short bezel  123  is also made of an insulation material. In this case, the first metal segment  1231 , the first insulation segment  1232 , the second metal segment  1233 , the second insulation segment  1234 , and the third metal segment  1235  that are successively connected are formed on an inner side of the first short bezel  123 . Structural forms of the first metal segment  1231 , the second metal segment  1233 , and the third metal segment  1235  may be a flexible circuit board, a laser direct structuring (LDS) metal, an in-mold injection molding metal, or a printed circuit board cabling. In addition, the first insulation segment  1232  and the second insulation segment  1234  may be formed by filling an insulation material. For example, the insulation material is a material such as polymer, glass, or ceramic, or a combination of these materials. In another embodiment, the first insulation segment  1237  and the second insulation segment  1234  may be gaps, that is, the gaps are not filled with an insulation material. 
     In a third embodiment, technical content that is the same as that in the first embodiment and the second embodiment is not described again. In this embodiment, an antenna structure formed by two slot antennas (a first slot antenna and a second slot antenna) is disposed, and two feed manners are used, so that the antenna structure is excited to generate a plurality of resonance modes. This implements that an antenna may cover a plurality of frequency bands. 
     Refer to  FIG.  23   a    and  FIG.  23   b   .  FIG.  23   a    is an enlarged schematic diagram of another embodiment at B of the electronic device shown in  FIG.  7   .  FIG.  23   b    is a schematic diagram of an antenna structure of the electronic device shown in  FIG.  23   a   .  FIG.  23   b    is a schematic diagram of the antenna structure shown in  FIG.  23   a   . This embodiment is described by using an example in which a radiator of an antenna structure including two slot antennas is a portion of the first short bezel  123 . In another embodiment, a radiator of an antenna structure including two slot antennas may alternatively be a portion of the first long bezel  121 , a portion of the second long bezel  122 , or a portion of the second short bezel  124 . 
     Specifically, the two slot antennas are a first slot antenna  61  and a second slot antenna  62 . 
     First, the first short bezel  123  is successively connected to the first metal segment  1231 , the first insulation segment  1232 , the second metal segment  1233 , the second insulation segment  1234 , the third metal segment  1235 , the third insulation segment  1236 , and the fourth metal segment  1237 . In other words, the first insulation segment  1232  is located between the first metal segment  1231  and the second metal segment  1233 . The second insulation segment  1234  is located between the second metal segment  1233  and the third metal segment  1235 . The third insulation segment  1236  is located between the third metal segment  1235  and the fourth metal segment  1237 . It may be understood that a fifth gap is formed between the first metal segment  1231  and the second metal segment  1233 . The first insulation segment  1232  may be formed by filling the fifth gap with an insulation material. For example, the insulation material may be a material such as polymer, glass, or ceramic, or a combination of these materials. In another embodiment, the fifth gap may be filled with air, that is, the fifth gap is not filled with any insulation material. For a disposition manner of the second insulation segment  1234  and the third insulation segment  1236 , refer to the disposition manner of the first insulation segment  1232 . Details are not described herein. 
     In addition, an end portion that is of the first metal segment  1231  and that is away from the first insulation segment  1232  is grounded. For a grounding manner of the first metal segment  1231  in this embodiment, refer to the grounding manner of the first ground portion  2  in the first embodiment, and details are not described herein again. An end portion that is of the second metal segment  1233  and that is close to the first insulation segment  1232  is grounded. An end portion that is of the third metal segment  1235  and that is close to the third insulation segment  1236  is grounded. An end portion that is of the fourth metal segment  1237  and that is away from the third insulation segment  1236  is grounded. For a grounding manner of the second metal segment  1233 , a grounding manner of the third metal segment  1235 , and a grounding manner of the fourth metal segment  1237  in this embodiment, refer to the grounding manner of the first ground portion  2  in the first embodiment, and details are not described herein again. 
     In addition, a first gap  31  is disposed between the first metal segment  1231  and the ground plane of the circuit board  30 . In an embodiment, the first gap  31  may be filled with an insulation material. For example, the first gap  31  may be filled with a material such as polymer, glass, or ceramic, or a combination of these materials. The insulation material is connected to the first insulation segment  1232 , the second insulation segment  1234 , and the third insulation segment  1236 . In another embodiment, the first gap  31  may be filled with air, that is, the first gap  31  is not filled with any insulation material. 
     In addition, a second gap  32  is disposed between the second metal segment  1233  and the ground plane of the circuit board  30 . The second gap  32  is connected to the first gap  31 . For a disposition manner of the second gap  32 , refer to the disposition manner of the first gap  31 . Details are not described herein. 
     In addition, a third gap  33  is disposed between the third metal segment  1235  and the ground plane of the circuit board  30 . The third gap  33  is connected to the first gap  31  and the second gap  32 . For a disposition manner of the third gap  33 , refer to the disposition manner of the first gap  31 . Details are not described herein. 
     In addition, a fourth gap  34  is disposed between the third metal segment  1235  and the ground plane of the circuit board  30 . The fourth gap  34  is connected to the first gap  31 , the second gap  32 , and the third gap  33 . For a disposition manner of the fourth gap  34 , refer to the disposition manner of the first gap  31 . Details are not described herein. 
     In this way, the first metal segment  1231  forms the first radiator  101 . The second metal segment  1233  forms the second radiator  102 . The third metal segment  1235  forms the third radiator  103 . The fourth metal segment  1237  forms the fourth radiator  104 . 
     In addition, the second radiator  102  and the third radiator  103  form a radiator of the first slot antenna  61 . 
     In addition, the first radiator  101  and the fourth radiator  104  form a radiator of the second slot antenna  62 . 
     Second, for a feed manner of the first slot antenna  61  in this embodiment, refer to the feed manner of the slot antenna  40  in the first embodiment. Details are not described herein. 
     In addition, for a feed manner of the second slot antenna  62  in this embodiment, refer to the feed manner of the wire antenna  50  in the first embodiment. Details are not described herein. 
     It may be understood that, in this embodiment, an antenna structure including two slot antennas is excited to generate a plurality of resonance modes, so that an antenna may cover a plurality of frequency bands. 
     In a fourth embodiment, technical content that is the same as that in the first embodiment and the second embodiment is not described again. An antenna structure including two wire antennas is disposed, and two feed manners are used, so that the antenna structure is excited to generate a plurality of resonance modes. This implements that an antenna may cover a plurality of frequency bands. 
     Refer to  FIG.  24   a    and  FIG.  24   b   .  FIG.  24   a    is an enlarged schematic diagram of further another embodiment at B of the electronic device shown in  FIG.  7   .  FIG.  24   b    is a schematic diagram of an antenna structure of the electronic device shown in  FIG.  24   a   . An example in which a radiator of an antenna structure including two wire antennas is a portion of the first short bezel  123  is used for description. In another embodiment, a radiator of an antenna structure including two wire antennas may alternatively be a portion of the first long bezel  121 , a portion of the second long bezel  122 , or a portion of the second short bezel  124 . 
     Specifically, the two wire antennas are a first wire antenna  71  and a second wire antenna  72 . 
     The first short bezel  123  includes a first metal segment  1231 , a first insulation segment  1232 , a second metal segment  1233 , a second insulation segment  1234 , and a third metal segment  1235  that are successively connected. In other words, the first insulation segment  1232  is located between the first metal segment  1231  and the second metal segment  1233 . The second insulation segment  1234  is located between the second metal segment  1233  and the third metal segment  1235 . 
     In addition, the second metal segment  1233  includes a first portion  1 , a first ground portion  2 , and a second portion  3 . The first portion  1  is connected to the first insulation segment  1232 . The second portion  3  is connected to the second insulation segment  1234 . It may be understood that a fourth gap is formed between the first metal segment  1231  and the first portion  1 . The first insulation segment  1232  may be formed by filling the fourth gap with an insulation material. For example, the insulation material may be a material such as polymer, glass, or ceramic, or a combination of these materials. In another embodiment, the fourth gap may be filled with air, that is, the fourth gap is not filled with any insulation material. In addition, a fifth gap is formed between the second portion  3  and the third metal segment  1235 . The second insulation segment  1234  may be formed by filling the fifth gap with an insulation material. For example, the insulation material may be a material such as polymer, glass, or ceramic, or a combination of these materials. 
     In addition, for a grounding manner of the first ground portion  2  in this embodiment, refer to the grounding manner of the first ground portion  2  in the first embodiment, and details are not described herein again. In addition, an end portion that is of the first metal segment  1231  and that is close to the first insulation segment  1232  is grounded. An end portion that is of the third metal segment  1235  and that is close to the second insulation segment  1234  is grounded. For a grounding manner of the first metal segment  1231  and a grounding manner of the third metal segment  1235 , refer to the grounding manner of the first ground portion  2  in the first embodiment, and details are not described herein again. 
     In addition, a first gap  31  is disposed between the first metal segment  1231  and the circuit board  30 . In an embodiment, the first gap  31  may be filled with an insulation material. For example, the first gap  31  may be filled with a material such as polymer, glass, or ceramic, or a combination of these materials. The insulation material is connected to the first insulation segment  1232 . In another embodiment, the first gap  31  may be filled with air, that is, the first gap  31  is not filled with any insulation material. 
     In addition, a second gap  32  is disposed between the second metal segment  1233  and the circuit board  30 . The second gap  32  is connected to the first gap  31 . For a disposition manner of the second gap  32 , refer to the disposition manner of the first gap  31 . Details are not described herein. 
     In addition, a third gap  33  is disposed between the third metal segment  1235  and the circuit board  30 . The third gap  33  is connected to the first gap  31  and the second gap  32 . For a disposition manner of the third gap  33 , refer to the disposition manner of the first gap  31 . Details are not described herein. 
     In this way, the first portion  1  and the first ground portion  2  form the second radiator  102 . The second portion  3  and the first ground portion  2  form the third radiator  103 . The second radiator  102  and the third radiator  103  form a radiator of the first wire antenna  71 . 
     In addition, the first metal segment  1231  forms the first radiator  101 . The third metal segment  1235  forms the fourth radiator  104 . The first radiator  101  and the fourth radiator  104  form a radiator of the second wire antenna  72 . 
     Second, for a feed manner of the first wire antenna  71  in this embodiment, refer to the feed manner of the slot antenna  40  in the first embodiment. Details are not described herein. 
     In addition, for a feed manner of the second wire antenna  72  in this embodiment, refer to the feed manner of the wire antenna  50  in the first embodiment. Details are not described herein. 
     It may be understood that, in this embodiment, an antenna structure including two wire antennas may be excited to generate a plurality of resonance modes, so that an antenna may cover a plurality of frequency bands. 
     In a fifth embodiment, technical content that is the same as that in the first embodiment and the second embodiment is not described again: An antenna structure including a loop antenna and a slot antenna is disposed, and two feed manners are used, so that the antenna structure is excited to generate a plurality of resonance modes. This implements that an antenna may cover a plurality of frequency bands. 
     Refer to  FIG.  25   a    and  FIG.  25   b   .  FIG.  25   a    is an enlarged schematic diagram of still another embodiment at B of the electronic device shown in  FIG.  7   .  FIG.  25   b    is a schematic diagram of an antenna structure of the electronic device shown in  FIG.  25   a   . An example in which a radiator of the antenna structure in this embodiment is a portion of the first short bezel  123  is used for description. In another embodiment, a radiator of the antenna structure may alternatively be a portion of the first long bezel  121 , a portion of the second long bezel  122 , or a portion of the second short bezel  124 . 
     Antennas of the electronic device  100  include a loop antenna  81  and a slot antenna  82 . 
     In an X-axis direction, the first short bezel  123  includes a first metal segment  1231 , a first insulation segment  1232 , a second metal segment  1233 , a second insulation segment  1234 , and a third metal segment  1235  that are successively connected. In other words, the first insulation segment  1232  is located between the first metal segment  1231  and the second metal segment  1233 . The second insulation segment  1234  is located between the second metal segment  1233  and the third metal segment  1235 . It may be understood that a fourth gap is formed between the first metal segment  1231  and the second metal segment  1233 . The first insulation segment  1232  may be formed by filling the fourth gap with an insulation material. For example, the insulation material may be a material such as polymer, glass, or ceramic, or a combination of these materials. In another embodiment, the fourth gap may be filled with air, that is, the fourth gap is not filled with any insulation material. For a disposition manner of the second insulation segment  1234 , refer to the disposition manner of the first insulation segment  1232 . 
     In addition, an end portion that is of the first metal segment  1231  and that is away from the first insulation segment  1232  is grounded. An end portion that is of the third metal segment  1235  and that is away from the second insulation segment  1234  is grounded. For a grounding manner of the first metal segment  1231  and a grounding manner of the third metal segment  1235 , refer to the grounding manner of the first ground portion  2  in the first embodiment, and details are not described herein again. 
     In addition, an end portion that is of the second metal segment  1233  and that is connected to the first insulation segment  1232  is grounded. An end portion that is of the second metal segment  1233  and that is connected to the second insulation segment  1234  is grounded. 
     Specifically, the antenna structure further includes a third conductive segment  41  and a fourth conductive segment  42 . The third conductive segment  41  and the fourth conductive segment  42  are located within the bezel  12 . One end of the third conductive segment  41  is connected to an end portion that is of the second metal segment  1233  and that is connected to the first insulation segment  1232 . The other end is grounded. One end of the fourth conductive segment  42  is connected to an end portion that is of the second metal segment  1233  and that is connected to the second insulation segment  1234 , and the other end is grounded. In other words, the end portion that is of the second metal segment  1233  and that is connected to the first insulation segment  1232  is grounded through the third conductive segment  41 . An end portion that is of the second metal segment  1233  and that is connected to the second insulation segment  1234  is grounded through the fourth conductive segment  42 . 
     For a grounding manner of the third conductive segment  41  and a grounding manner of the fourth conductive segment  42 , refer to the grounding manner of the first ground portion  2  in the first embodiment. Details are not described herein. 
     In addition, a first gap  31  is disposed between the second metal segment  1233  and the circuit board  30 . In an embodiment in which the first gap  31  is connected, the first gap  31  may be filled with an insulation material. For example, the first gap  31  may be filled with a material such as polymer, glass, or ceramic, or a combination of these materials. The insulation material is connected to the first insulation segment  1233 . In another embodiment, the first gap  31  may be filled with air, that is, the first gap  31  is not filled with any insulation material. 
     In addition, a second gap  32  is disposed between the first metal segment  1231  and the circuit board  30 . The second gap  32  is connected to the first gap  31 . For a disposition manner of the second gap  32 , refer to the disposition manner of the first gap  31 . Details are not described herein. 
     In addition, a third gap  33  is disposed between the third metal segment  1235  and the circuit board  30 . The third gap  33  is connected to the first gap  31  and the second gap  32 . For a disposition manner of the third gap  33 , refer to the disposition manner of the first gap  31 . Details are not described herein. 
     In this way, the first metal segment  1231  forms the first radiator  101 . The second metal segment  1233  forms the second radiator  102 . The third metal segment  1235  forms the third radiator  103 . The second radiator  102  is a radiator of the loop antenna  81 . The first radiator  101  and the third radiator  103  are radiators of the slot antenna  82 . 
     Second, the following describes a feed manner of the loop antenna  81  in detail with reference to related accompanying drawings. 
     The loop antenna  81  further includes a first feed circuit  83 . A negative electrode of the first feed circuit  83  is electrically grounded. A positive electrode of the first feed circuit  83  is electrically connected to the second radiator  102 . 
     In addition, for a feed manner of the slot antenna  82  in this embodiment, refer to the feed manner of the wire antenna  50  in the first embodiment. Details are not described herein. 
     It may be understood that, in this embodiment, an antenna structure including the loop antenna  81  and the slot antenna  82  may be excited to generate four antenna modes, so that an antenna may cover a plurality of frequency bands. 
     In this application, antenna structures in five embodiments and two feed manners are described with reference to related accompanying drawings, so that the antenna structure can generate a plurality of resonance modes. This implements that an antenna may cover a large quantity of frequency bands. 
     The foregoing descriptions are merely specific embodiments of this application, but are not intended to limit the protection scope of this application. Any variation or replacement readily figured out by a person skilled in the art within the technical scope disclosed in this application shall fall within the protection scope of this application. Therefore, the protection scope of this application shall be subject to the protection scope of the claims.