Patent Description:
<CIT> describes an electronic device with a conductive wall. It is described that a gap in the wall may divide the wall into first and second segments. It is described that a ground may be separated from the wall by first, second, and third slots that form radiating elements for first, second, and third non-near-field communications antennas. It is described that a first and second conductive structures may be coupled between the wall and the ground. It is described that a near-field communications antenna may include a first feed terminal coupled to the first segment and a second feed terminal coupled to the second segment. It is described that the antenna may convey signals over a conductive loop path that includes portions of the first and second segments, the antenna ground, and the first and second conductive structures. It is described that a differential or single-ended signal transmission line may be coupled to the terminals. It is described that a phase shifters may configure the signals to be out of phase at the feed terminals.

<CIT> relates to an electronic device including a housing antenna formed from a conductive material. It is described that at least parts of a side member and a rear cover that constitute the housing of the electronic device are used as an antenna.

A multi-input multi-output (multi-input multi-output, MIMO) technology plays a very important role in a 5th generation (5th generation, <NUM>) wireless communications system. However, it is still a great challenge for a mobile terminal, such as a mobile phone, to achieve good MIMO performance. One of the reasons is that very limited space inside the mobile terminal limits a frequency band that a MIMO antenna can cover and high performance.

Embodiments of the present invention provide an electronic device. Both a differential mode slot antenna and a common mode slot antenna are excited on a same slot antenna radiator, so that characteristics such as high isolation and a low ECC of a MIMO antenna can be achieved.

Appended claim <NUM> defines an electronic device. The invention and its scope of protection is defined by this claim. The following aspects and implementations of the disclosure provide examples of combinations of technical subject matters.

According to a first aspect, an embodiment of this application provides an electronic device, and the electronic device includes a PCB, a metal frame, and an antenna apparatus. The antenna apparatus may include a slot, a first feeding point, a second feeding point, and a bridge structure.

The slot may be disposed between the PCB and a first segment of the metal frame. Both ends of the slot may be grounded. The slot may include a first side edge and a second side edge, the first side edge may include one side edge of the PCB, and the second side edge may include the first segment of the metal frame. A gap may be disposed on the second side edge. The second side edge may include a first part and a second part, the first part may be located on one side of the gap, and the second part may be located on the other side of the gap.

The first feeding point may be located on the first part of the second side edge, and the second feeding point may be located on the second part of the second side edge. The first feeding point may be connected to a positive electrode of a feed of the antenna apparatus, and the second feeding point may be connected to a negative electrode of the feed of the antenna apparatus.

The bridge structure may include a first end and a second end. The first end may be connected to the first part, or extend to the slot across the first side edge. The second end may be connected to the second part, or extend to the slot across the first side edge. A third feeding point may be disposed on the bridge structure, and the third feeding point may be connected to the positive electrode of the feed.

In the first aspect, a feeding structure including the first feeding point and the second feeding point may excite the slot to generate a CM slot antenna pattern. This feeding structure is anti-symmetric feeding mentioned in subsequent embodiments. Distribution of electric fields and currents in the CM slot antenna pattern has the following characteristics: The currents are distributed in a same direction on two sides of the gap, but the electric fields are distributed in opposite directions on two sides of the gap. The currents and the electric fields in the CM slot antenna pattern may be generated when slots on two sides of the gap each work in a <NUM>/<NUM> wavelength mode.

In the first aspect, a feeding structure including the bridge structure and the third feeding point disposed on the bridge structure may excite the slot to generate a DM slot antenna pattern. This feeding structure is symmetric feeding mentioned in subsequent embodiments. Distribution of electric fields and currents in the DM slot antenna pattern has the following characteristics: The currents are distributed in opposite directions on two sides of the gap, but the electric fields are distributed in a same direction on two sides of the gap. The currents and the electric fields in the DM slot antenna pattern may be generated when the entire slot works in a <NUM>/<NUM> wavelength mode.

It can be learned that, in the antenna design solution used for the electronic device in the first aspect, the metal frame and a PCB ground layer of the electronic device are used to form the slot. Through symmetric feeding and anti-symmetric feeding, the slot can be excited to generate two slot antenna patterns: the CM slot antenna pattern and the DM slot antenna pattern, so that characteristics such as high isolation and a low ECC of a MIMO antenna can be achieved in a wideband. In addition, the two slot antenna patterns share a same slot antenna radiator, so that antenna design space can be saved.

With reference to the first aspect, in some embodiments, the first feeding point and the second feeding point may be connected to a feeding network of the feed, and the feeding network may include two symmetric parallel conducting wires that are formed by hollowing out the PCB ground layer and that extend from the ground layer.

With reference to the first aspect, in some embodiments, the bridge structure may be a metal support obtained through laser direct structuring LDS, and may be disposed on a back side of a PCB <NUM>. The bridge structure can optimize impedance matching. In two sides of the PCB <NUM>, a side on which a PCB ground layer is disposed may be referred to as a PCB front side, and the other side (on which no PCB ground layer is disposed) may be referred to as a PCB back side.

With reference to the first aspect, in some embodiments, the gap may be disposed in a middle position on the second side edge, or may be disposed away from the middle position.

With reference to the first aspect, in some embodiments, the slot may be a U-shaped slot. For example, the slot may extend from a bottom edge of the metal frame to two side edges of the metal frame, and may be a U-shaped slot located at the bottom of the electronic device. Similarly, the slot may alternatively be a U-shaped slot located at the top of the electronic device, or a U-shaped slot on a side edge of the electronic device.

With reference to the first aspect, in some embodiments, the slot may be an L-shaped slot. For example, the slot may extend from a bottom edge of the metal frame to one side edge of the metal frame, and may be an L-shaped slot located on the left side or the right side at the bottom of the electronic device. Similarly, the slot may alternatively be an L-shaped slot located at the top of the electronic device.

With reference to the first aspect, in some embodiments, a disposing position of the antenna apparatus in the electronic device may be one or more of the following: the bottom of the electronic device, the top of the electronic device, or a side edge of the electronic device.

With reference to the first aspect, in some embodiments, the electronic device may include a plurality of antenna apparatuses, and the plurality of antenna apparatuses may be disposed in a plurality of positions such as the top of the electronic device, the bottom of the electronic device, or the side edge of the electronic device. For example, if the electronic device includes two antenna apparatuses, the two antenna apparatuses may be separately disposed at the top and the bottom of the electronic device.

With reference to the first aspect, in some embodiments, the first feeding point and the second feeding point may be respectively connected to the positive electrode and the negative electrode of the feed through a coaxial transmission line, the first feeding point is specifically connected to a center conductor of the coaxial transmission line, and the second feeding point is specifically connected to an outer conductor of the coaxial transmission line.

With reference to the first aspect, in some embodiments, the first feeding point and the second feeding point may be disposed close to the gap, or may be separately disposed close to two ends of the slot.

With reference to the first aspect, in some embodiments, a size of the bridge structure is large, and some lumped devices (such as a lumped inductor) may be added to reduce the size, that is, a part of the bridge structure is a lumped device.

With reference to the first aspect, in some embodiments, the bridge structure is not limited to the LDS metal support mounted on the back side of the PCB, and may alternatively be formed by hollowing out the PCB ground layer.

According to a second aspect, an embodiment of this application provides an electronic device, and the electronic device includes a PCB, a metal frame, and an antenna apparatus. The antenna apparatus may include a slot, a first feeding point, a second feeding point, and a bridge structure.

The slot may be disposed between the PCB and a first segment of the metal frame, the first segment of the metal frame includes a first end and a second end, and both ends of the slot are grounded. The slot may include a first side edge and a second side edge, the first side edge may include one side edge of the PCB, and the second side edge may include the first segment of the metal frame. A plurality of gaps may be disposed on the second side edge. The second side edge may include a first part, a second part, and a third part, the first part may be located on one side of the third part, and the second part may be located on the other side of the third part. The third part may include a first gap, a second gap, and a suspended segment located between the first gap and the second gap.

It can be learned that a difference between the second aspect and the first aspect lies in that there are two gaps on the second side edge in the second aspect: the first gap and the second gap. Not limited to two gaps, tgaphe third part may include three or more gaps and suspended segments between these gaps.

With reference to the second aspect, in some embodiments, the bridge structure may further be connected to the suspended segment in the third part.

With reference to the second aspect, in some embodiments, the bridge structure may include a T-shaped structure. The T-shaped structure is connected to slots on two sides of the gaps, and a suspended metal frame between the gaps. Specifically, the T-shaped structure may include a horizontal stub and a vertical stub. Two ends of the horizontal stub are respectively the first end and the second end, and are respectively connected to the first part of the second side edge and the second part of the second side edge. The vertical stub is connected to the suspended segment.

With reference to the second aspect, in some embodiments, the bridge structure may be a metal support obtained through laser direct structuring LDS, and may be disposed on a back side of the PCB. The bridge structure can optimize impedance matching. In two sides of the PCB, a side on which a PCB ground layer is disposed may be referred to as a PCB front side, and the other side (on which no PCB ground layer is disposed) may be referred to as a PCB back side.

With reference to the second aspect, in some embodiments, the gap may be disposed in a middle position on the second side edge, or may be disposed away from the middle position.

With reference to the second aspect, in some embodiments, the slot may be a U-shaped slot. For example, the slot may extend from a bottom edge of the metal frame to two side edges of the metal frame, and may be a U-shaped slot located at the bottom of the electronic device. Similarly, the slot may alternatively be a U-shaped slot located at the top of the electronic device, or a U-shaped slot on a side edge of the electronic device.

With reference to the second aspect, in some embodiments, the slot may be an L-shaped slot. For example, the slot may extend from a bottom edge of the metal frame to one side edge of the metal frame, and may be an L-shaped slot located on the left side or the right side at the bottom of the electronic device. Similarly, the slot may alternatively be an L-shaped slot located at the top of the electronic device.

With reference to the second aspect, in some embodiments, a disposing position of the antenna apparatus in the electronic device may be one or more of the following: the bottom of the electronic device, the top of the electronic device, or a side edge of the electronic device.

With reference to the second aspect, in some embodiments, the electronic device may include a plurality of antenna apparatuses, and the plurality of antenna apparatuses may be disposed in a plurality of positions such as the top of the electronic device, the bottom of the electronic device, or the side edge of the electronic device. For example, if the electronic device includes two antenna apparatuses, the two antenna apparatuses may be separately disposed at the top and the bottom of the electronic device.

With reference to the second aspect, in some embodiments, the first feeding point and the second feeding point may be respectively connected to the positive electrode and the negative electrode of the feed through a coaxial transmission line, the first feeding point is specifically connected to a center conductor of the coaxial transmission line, and the second feeding point is specifically connected to an outer conductor of the coaxial transmission line.

With reference to the second aspect, in some embodiments, the first feeding point and the second feeding point may be disposed close to the gap, or may be separately disposed close to two ends of the slot.

With reference to the second aspect, in some embodiments, a size of the bridge structure is large, and some lumped devices (such as a lumped inductor) may be added to reduce the size, that is, a part of the bridge structure is a lumped device.

With reference to the second aspect, in some embodiments, the bridge structure is not limited to the LDS metal support mounted on the back side of the PCB, and may alternatively be formed by hollowing out the PCB ground layer.

To describe technical solutions in embodiments of this application more clearly, the following describes the accompanying drawings used in embodiments of this application.

The following describes embodiments of the present invention with reference to the accompanying drawings in embodiments of the present invention.

The technical solutions provided in this application are applicable to an electronic device that uses one or more of the following communications technologies: a Bluetooth (Bluetooth, BT) communications technology, a global positioning system (global positioning system, GPS) communications technology, a wireless fidelity (wireless fidelity, Wi-Fi) communications technology, a global system for mobile communications (global system for mobile communications, GSM) communications technology, a wideband code division multiple access (wideband code division multiple access, WCDMA) communications technology, a long term evolution (long term evolution, LTE) communications technology, a <NUM> communications technology, a sub-<NUM> communications technology, other future communications technologies, and the like. In this application, the electronic device may be a mobile phone, a tablet computer, a personal digital assistant (personal digital assistant, PDA), or the like.

<FIG> shows an example of an internal environment of an electronic device on which an antenna design solution provided in this application is based. As shown in <FIG>, the electronic device <NUM> may include cover glass <NUM>, a display <NUM>, a printed circuit board PCB <NUM>, a housing <NUM>, and a rear cover <NUM>.

The cover glass <NUM> may be disposed snugly against the display <NUM>, and may be mainly used to protect the display <NUM> against dust.

The printed circuit board PCB <NUM> may be an FR-<NUM> dielectric board, or may be a Rogers (Rogers) dielectric board, or may be a hybrid dielectric board of Rogers and FR-<NUM>, or the like. Herein, FR-<NUM> is a grade designation for a flame-retardant material, and the Rogers dielectric board is a high frequency board. A metal layer may be disposed on a side that is of the printed circuit board PCB <NUM> and that is close to the housing <NUM>, and the metal layer may be formed by etching metal on a surface of the PCB <NUM>. The metal layer may be used to ground an electronic element carried on the printed circuit board PCB <NUM>, to prevent an electric shock of a user or device damage. The metal layer may be referred to as a PCB ground layer. In this application, in two sides of the PCB <NUM>, a side on which the PCB ground layer is disposed may be referred to as a PCB front side (front side), and the other side (on which no PCB ground layer is disposed) may be referred to as a PCB back side (back side).

The housing <NUM> is mainly used to support the entire device. The housing <NUM> may include a metal frame <NUM>, and the metal frame <NUM> may be made of a conductive material such as metal. The metal frame <NUM> may extend around a periphery of the PCB <NUM> and the display <NUM>, to help fasten the display <NUM>. In an implementation, the metal frame <NUM> made of the metal material may be directly used as a metal frame of the electronic device <NUM> to form a metal frame appearance, and this is applicable to a metal ID. In another implementation, a non-metal frame such as a plastic frame may be disposed on an outer surface of the metal frame <NUM> to form a non-metal frame appearance, and this is applicable to a non-metal ID.

The metal frame <NUM> may be divided into four parts, and the four parts may be named as a bottom edge, a top edge, and two side edges based on different locations of the four parts in the electronic device. The top edge may be disposed at the top of the electronic device <NUM>, and the bottom edge may be disposed at the bottom of the electronic device <NUM>. The two side edges may be respectively disposed on two sides of the electronic device <NUM>. Components such as a front-facing camera (not shown), an earpiece (not shown), and an optical proximity sensor (not shown) may be disposed at the top of the electronic device <NUM>. A USB charging interface (not shown), a microphone (not shown), and the like may be disposed at the bottom of the electronic device <NUM>. A volume adjustment button (not shown) and a power button (not shown) may be disposed at the side edges of the electronic device <NUM>.

The rear cover <NUM> may be a rear cover made of a non-metal material, for example, a non-metal rear cover such as a glass rear cover or a plastic rear cover, or may be a rear cover made of a metal material.

<FIG> shows only an example of some components included in the electronic device <NUM>. Actual shapes, actual sizes, and actual construction of these components are not limited in <FIG>.

The electronic device <NUM> may use a bezel-less screen industrial design (industry design, ID) to bring more comfortable visual experience to users. The bezel-less screen means a large screen-to-body ratio (which is usually over <NUM>%). Because a width of a bezel of the bezel-less screen is greatly reduced, internal components of the electronic device <NUM>, such as a front-facing camera, a receiver, a fingerprint sensor, and an antenna, need to be rearranged. Especially for an antenna design, a clearance area is reduced and antenna space is further compressed.

In the conventional technology, when antenna design space is further reduced, on a mobile phone with a common ID such as a metal frame or a glass rear cover, a plurality of different radiators are usually deployed around the entire mobile phone to implement a MIMO antenna. However, the plurality of different radiators need to meet high requirements in terms of an antenna form, grounding, feeding, and the like, to achieve high antenna isolation and a low envelope correlation coefficient (envelope correlation coefficient, ECC). The following uses an example for description.

<FIG> shows an example of a simulation model in the conventional technology. <FIG> is a principle structural diagram of the model shown in <FIG>. As shown in <FIG> and <FIG>, parameters of the entire device are set as follows: A length is <NUM>, and a width is <NUM>. A slot <NUM> between the metal frame <NUM> and the PCB ground layer may be used to form two slot antenna radiators in a <NUM>/<NUM> wavelength mode that have one end open and one end grounded: a low-frequency slot antenna LB1 and a low-frequency slot antenna LB2. The two slot antennas are respectively distributed on two sides at the bottom of the electronic device <NUM>. A grounding end GND1 of the low-frequency slot antenna LB1 is adjacent to a grounding end GND2 of the low-frequency slot antenna LB2. A distance between GND <NUM> and GND2 is set to <NUM>.

<FIG> shows an S parameter simulation of the example antenna structure shown in <FIG>. S11 and S22 represent S parameter curves of the slot antenna LB1 and the slot antenna LB2 respectively, and S21 represents isolation between the slot antenna LB1 and the slot antenna LB2. <FIG> shows radiation efficiency and system efficiency of the example antenna structure shown in <FIG>. A curve LB1 and a curve LB2 represent efficiency curves of the slot antenna LB1 and the slot antenna LB2, respectively. <FIG> shows radiation directions of the example antenna structure shown in <FIG>. It can be learned that, in the conventional solution in which a plurality of different radiators are arranged around the entire device to implement the MIMO antenna, although the distance between the respective grounding ends of the slot antenna LB1 and the slot antenna LB2 is long (up to <NUM>), isolation between the slot antenna LB1 and the slot antenna LB2 is not ideal (<NUM> dB), and an ECC is up to <NUM>.

This application provides a MIMO antenna design solution. Through symmetric feeding and anti-symmetric feeding, a differential mode slot antenna and a common mode slot antenna are excited on a same slot antenna radiator, so that characteristics such as high isolation and a low ECC of a MIMO antenna can be achieved.

First, two antenna patterns in this application are described.

As shown in <FIG>, a slot antenna <NUM> may include a slot <NUM>, a feeding point <NUM>, and a feeding point <NUM>. The slot <NUM> may be disposed on a PCB ground layer. An opening <NUM> is disposed on one side of the slot <NUM>, and the opening <NUM> may be specifically disposed in a middle position on the side. The feeding point <NUM> and the feeding point <NUM> may be respectively disposed on two sides of the opening <NUM>. The feeding point <NUM> and the feeding point <NUM> may be respectively configured to connect to a positive electrode and a negative electrode of a feed of the slot antenna <NUM>. For example, a coaxial transmission line is used to feed the slot antenna <NUM>. A center conductor of the coaxial transmission line(transmission line center conductor) may be connected to the feeding point <NUM> through the transmission line, and an outer conductor of the coaxial transmission line (transmission line outer conductor) may be connected to the feeding point <NUM> through the transmission line. The coaxial transmission line outer conductor is grounded.

In other words, the slot antenna <NUM> may be fed at the opening <NUM>, and the opening <NUM> may also be referred to as a feeding position. The positive electrode of the feed may be connected to one side of the opening <NUM>, and the negative electrode of the feed may be connected to the other side of the opening <NUM>.

<FIG> shows distribution of currents, electric fields, and magnetic currents of the slot antenna <NUM>. As shown in <FIG>, the currents are distributed in a same direction on two sides of a middle position of the slot antenna <NUM>, but the electric fields and the magnetic currents are distributed in opposite directions on two sides of the middle position of the slot antenna <NUM>. The feeding structure shown in <FIG> may be referred to as an anti-symmetric feeding structure. The slot antenna pattern shown in <FIG> may be referred to as a CM slot antenna pattern. The currents, electric fields, and magnetic currents shown in <FIG> may be respectively referred to as currents, electric fields, and magnetic currents in the CM slot antenna pattern.

The currents and the electric fields in the CM slot antenna pattern are generated when slots on two sides of the middle position of the slot antenna <NUM> separately work in a <NUM>/<NUM> wavelength mode. The currents are weak in the middle position of the slot antenna <NUM>, and are strong at both ends of the slot antenna <NUM>. The electric fields are strong in the middle position of the slot antenna <NUM>, and are weak at both ends of the slot antenna <NUM>.

As shown in <FIG>, a slot antenna <NUM> may include a slot <NUM>, a feeding point <NUM>, and a feeding point <NUM>. The slot <NUM> may be disposed on a PCB ground layer. The feeding point <NUM> and the feeding point <NUM> may be respectively disposed in middle positions of two side edges of the slot <NUM>. The feeding point <NUM> and the feeding point <NUM> may be respectively configured to connect to a positive electrode and a negative electrode of a feed of the slot antenna <NUM>. For example, a coaxial transmission line is used to feed the slot antenna <NUM>. A center conductor of the coaxial transmission line may be connected to the feeding point <NUM> through the transmission line, and an outer conductor of the coaxial transmission line may be connected to the feeding point <NUM> through the transmission line. The coaxial transmission line outer conductor is grounded.

In other words, a middle position <NUM> of the slot antenna <NUM> is connected to the feed, and the middle position <NUM> may also be referred to as a feeding position. The positive electrode of the feed may be connected to one side edge of the slot <NUM>, and the negative electrode of the feed may be connected to the other side edge of the slot <NUM>.

<FIG> shows distribution of currents, electric fields, and magnetic currents of the slot antenna <NUM>. As shown in <FIG>, the currents are distributed in opposite directions on two sides of the middle position <NUM> of the slot antenna <NUM>, but the electric fields and the magnetic currents are distributed in a same direction on two sides of the middle position <NUM> of the slot antenna <NUM>. The feeding structure shown in <FIG> may be referred to as a symmetric feeding structure. The slot antenna pattern shown in <FIG> may be referred to as a DM slot antenna pattern. The currents, electric fields, and magnetic currents shown in <FIG> may be respectively referred to as currents, electric fields, and magnetic currents in the DM slot antenna pattern.

The currents and electric fields in the DM slot antenna pattern are generated when the entire slot <NUM> works in a <NUM>/<NUM> wavelength mode. The currents are weak in the middle position of the slot antenna <NUM>, and are strong at both ends of the slot antenna <NUM>. The electric fields are strong in the middle position of the slot antenna <NUM>, and are weak at both ends of the slot antenna <NUM>.

The following describes in detail a plurality of embodiments provided in this application with reference to the accompanying drawings. In the following embodiments, antenna simulation is based on the following environment: An overall width is <NUM>, and an overall length is <NUM>. The metal frame <NUM> has a thickness of <NUM> and a width of <NUM>, and an antenna clearance of a Z-direction projection area is <NUM>. Widths of gaps (for example, a gap <NUM>) on the metal frame <NUM> are all in a range of <NUM> to <NUM>. A dielectric constant of materials filled in a slot (for example, a slot <NUM>) formed between the metal frame <NUM> and the PCB ground layer, in a gap <NUM> on the metal frame <NUM>, and in a gap between a bridge structure <NUM> and the PCB ground layer is <NUM>, and a loss angle is <NUM>.

In this embodiment, a slot is formed between a metal frame <NUM> and a PCB ground layer. Through symmetric feeding and anti-symmetric feeding, the slot is excited to generate two low-frequency (an operating frequency band is near LTE B5) antenna patterns: a CM slot antenna pattern and a DM slot antenna pattern.

<FIG> show a MIMO antenna apparatus according to Embodiment <NUM>. <FIG> is a front-side view (front-side view) of the MIMO antenna apparatus, and <FIG> is a simplified diagram of a front-side structure of the MIMO antenna apparatus. <FIG> is a back-side view (back-side view) of the MIMO antenna apparatus, and <FIG> is a simplified diagram of a back-side structure of the MIMO antenna apparatus. Herein, the front side is a front side of the PCB <NUM>, and the back side is a back side of the PCB <NUM>. The front-side view shows an anti-symmetric feeding design for the antenna structure, and the back-side view shows a symmetric feeding design for the antenna structure.

As shown in <FIG>, the MIMO antenna apparatus provided in Embodiment <NUM> may include a slot <NUM>, a feeding point M, a feeding point N, and a bridge structure <NUM>.

The slot <NUM> may be disposed between the PCB <NUM> and a first segment of the metal frame <NUM>. One side edge <NUM>-<NUM> of the slot <NUM> includes one side edge <NUM>-<NUM> of the PCB <NUM>, and the other side edge <NUM>-<NUM> includes the first segment of the metal frame <NUM>. The first segment of the metal frame <NUM> may be a segment of the metal frame between a position <NUM>-<NUM> and a position <NUM>-<NUM>. The side edge <NUM>-<NUM> may be referred to as a first side edge, and the side edge <NUM>-<NUM> may be referred to as a second side edge. The first segment of the metal frame <NUM> may be specifically a bottom edge of the metal frame, that is, the slot <NUM> may be disposed between the PCB <NUM> and the bottom edge of the metal frame. For example, as shown in <FIG>, the slot <NUM> may extend from the bottom edge of the metal frame <NUM> to a side edge of the metal frame <NUM>, and may be a U-shaped slot that is located at the bottom of the electronic device <NUM> and that has a symmetric structure.

Two ends of the slot <NUM> may be grounded, and the two ends may include one end <NUM>-<NUM> and the other end <NUM>-<NUM>.

A gap <NUM> may be disposed on the side edge <NUM>-<NUM> that is of the slot <NUM> and that is formed by using the metal frame <NUM>. The gap <NUM> may connect the slot <NUM> to external free space. One gap <NUM> may be disposed on the side edge <NUM>-<NUM>, or a plurality of gaps <NUM> may be disposed on the side edge <NUM>-<NUM>.

When there is one gap <NUM> on the side edge <NUM>-<NUM>, the side edge <NUM>-<NUM> may include two parts: a first part and a second part, where the first part is located on one side of the gap <NUM>, and the second part is located on the other side of the gap <NUM>.

When there may be a plurality of gaps <NUM> on the side edge <NUM>-<NUM>, the plurality of gaps <NUM> may divide the side edge <NUM>-<NUM> to form a suspended segment. Specifically, when there are a plurality of gaps <NUM> on the side edge <NUM>-<NUM>, the side edge <NUM>-<NUM> may include three parts: a first part, a second part, and a third part, where the first part is located on one side of the third part, the second part is located on the other side of the third part, and the third part may include the plurality of gaps <NUM> and a suspended segment between the plurality of gaps <NUM>. For example, when there are two gaps <NUM> (which may be respectively referred to as a first gap and a second gap) on the side edge <NUM>-<NUM>, the side edge <NUM>-<NUM> may include three parts: a first part, a second part, and a third part, where the first part is located on one side of the third part, the second part is located on the other side of the third part, and the third part may include the two gaps <NUM> and a suspended segment between the two gaps <NUM>.

The gap <NUM> may be disposed in a middle position on the side edge, or may be disposed away from the middle position. If thegapre are a plurality of gaps <NUM>, that the gap <NUM> is disposed in a middle position on the side edge may mean that the plurality of gaps are located in the middle position on the side edge <NUM>-<NUM> as a whole.

The feeding point M and the feeding point N may be located on the side edge <NUM> -<NUM>, formed by using the metal frame <NUM>, of the slot <NUM>, and may be specifically separately disposed on two sides of the gap <NUM>. That is, the feeding point M is located on the first part of the side edge <NUM> -<NUM>, and the feeding point N is located on the second part of the side edge <NUM>-<NUM>.

The bridge structure <NUM> may be a metal support formed through laser direct structuring (laser direct structuring, LDS), and may be disposed on the back side of the PCB <NUM>. For example, as shown in <FIG>, a height of the bridge structure <NUM> on the back side of the PCB <NUM> may be <NUM>. The height is not limited thereto, and the height may alternatively be another value. This is not limited in this application. The bridge structure <NUM> may be referred to as a "bridge" structure of slots on two sides of the gap <NUM>, and can optimize impedance matching. Two ends of the bridge structure <NUM> may be connected to the slot <NUM>, and specifically, may be respectively connected to the slots on the two sides of the gap.

The two ends of the bridge structure <NUM> include a first end <NUM>-<NUM> and a second end <NUM>-<NUM>. The first end <NUM>-<NUM> may be connected to the first part of the side edge <NUM>-<NUM>, or extend to the slot across the first side edge. The second end <NUM>-<NUM> may be connected to the second part of the side edge <NUM>-<NUM>, or extend to the slot across the first side edge. When the slot <NUM> is a U-shaped slot extending to a side edge of the metal frame <NUM>, the first end <NUM>-<NUM> and the second end <NUM>-<NUM> may be specifically respectively connected to two side edges of the metal frame <NUM>.

A size of the antenna apparatus provided in Embodiment <NUM> may be shown in <FIG> or <FIG>, and a width of the slot <NUM> is <NUM>. A distance between each of closed ends (grounding ends) of the slot <NUM>, that is, two ends extending to the side edges of the metal frame <NUM>, and the bottom edge of the metal frame <NUM> is <NUM>. Widths of the two gaps disposed at the bottom of the metal frame <NUM> are <NUM>, and a distance between the two gaps is <NUM>. A distance from a left gap to a left side of the metal frame <NUM> is <NUM>, and a distance from a right gap to a right side of the metal frame <NUM> is <NUM>.

The antenna apparatus provided in Embodiment <NUM> may have two feeding structures: an anti-symmetric feeding structure and a symmetric feeding structure.

The feeding point M and the feeding point N may be respectively configured to connect to a positive electrode and a negative electrode of a feed. For example, a coaxial transmission line may be used to connect to the feed. A center conductor of the coaxial transmission line (connected to the positive electrode of the feed) may be connected to the feeding point M through the transmission line, and an outer conductor (grounded) of the coaxial transmission line may be connected to the feeding point N through the transmission line. The feeding point M may also be referred to as a positive feeding point (positive feeding point), and the feeding point N may also be referred to as a negative feeding point (negative feeding point).

As shown in <FIG> and <FIG>, a feeding network connected to the feeding point M and the feeding point N may be specifically implemented by hollowing out the PCB <NUM>, to fully utilize the PCB ground layer on the front side of the PCB <NUM> to implement the feeding network, so as to save design space. For example, as shown in <FIG>, a partial area in the center of the bottom of the PCB <NUM> may be hollowed out to form the feeding network of the slot antenna. Two parallel conducting wires <NUM>-<NUM> and <NUM>-<NUM> that are symmetrical from left to right extend from the PCB ground layer, and a positive electrode C and a negative electrode D of the feed are formed between the conducting wire <NUM>-<NUM> and the conducting wire <NUM>-<NUM>. Connection points between the feeding network and the slot <NUM> are the feeding point M and the feeding point N. When a matching network is configured, the connection point is a connection point through which the feeding network is indirectly connected to the slot <NUM> through the matching network. An equivalent circuit of the feeding network may be shown in <FIG>.

In addition, a matching network <NUM> of the feeding network may be further formed by hollowing out the PCB <NUM>. Connection points between the matching network <NUM> and the feeding network are a connection point E, a connection point F, a connection point J, and a connection point K. <FIG> and <FIG> show merely an example of an implementation of a matching network, and a different matching network may alternatively be used. This is not limited in this application.

The feeding structure shown in <FIG> and <FIG> may excite the slot <NUM> to generate the CM slot antenna pattern. The feeding structure of anti-symmetric feeding is not limited to a form of using two parallel conducting wires (conducting wires <NUM>-<NUM> and <NUM>-<NUM>), and another feeding form of the balun structure may alternatively be used. This is not limited in this application.

As shown in <FIG> and <FIG>, a feeding point S may be disposed on the bridge structure <NUM>, and the feeding point S may be connected to a feed end (positive electrode) of the feed (signal source). The bridge structure <NUM> shown in <FIG> and <FIG> may be connected to the slot <NUM>. Specifically, the bridge structure <NUM> may be connected to the side edge <NUM>-<NUM>, formed by using the metal frame <NUM>, of the slot <NUM>, and excite the slot <NUM> to generate the DM slot antenna pattern.

It can be learned that, according to the foregoing symmetric feeding structure and anti-symmetric feeding structure, the CM slot antenna pattern and the DM slot antenna pattern can be excited on a same slot antenna, so that characteristics such as high isolation and a low ECC of a MIMO antenna can be achieved.

Simulation of the antenna apparatus provided in Embodiment <NUM> is described below with reference to the accompanying drawings.

<FIG> respectively show a reflection coefficient, isolation, and antenna efficiency of the MIMO antenna apparatus.

<FIG> shows a group of reflection coefficient curves of the simulation of the MIMO antenna apparatus. "<NUM>" and "<NUM>" represent different resonances. The MIMO antenna apparatus may generate the resonance "<NUM>" near <NUM>, and may further generate the resonance "<NUM>" near <NUM>. The resonance "<NUM>" is a resonance in the CM slot antenna pattern, and the resonance "<NUM>" is a resonance in the DM slot antenna pattern. Specifically, the resonance "<NUM>" may be generated when the slots on two sides of the gap <NUM> each work in the <NUM>/<NUM> wavelength mode. The resonance "<NUM>" may be generated when the entire slot <NUM> works in the <NUM>/<NUM> wavelength mode. A wavelength mode in which the slot <NUM> generates the resonance "<NUM>" is not limited, and the resonance "<NUM>" may alternatively be generated when the slots on the two sides of the gap <NUM> work in a <NUM>/<NUM> wavelength mode or the like. A wavelength mode in which the slot <NUM> generates the resonance "<NUM>" is not limited, and the resonance "<NUM>" may alternatively be generated when the slot <NUM> works in a <NUM> wavelength mode, a <NUM>/<NUM> wavelength mode, or the like. In addition to the <NUM> frequency band shown in <FIG>, the antenna apparatus provided in Embodiment <NUM> may further generate a resonance in another low frequency band. This may be specifically set by adjusting the size of the slot <NUM>.

<FIG> shows isolation between two slot antenna patterns of the MIMO antenna apparatus. It can be learned that the isolation between the two slot antenna patterns can be up to more than <NUM> dB.

<FIG> shows radiation efficiency and system efficiency of two slot antenna patterns of the MIMO antenna apparatus. It can be learned that both of the slot antenna patterns have good radiation efficiency and system efficiency near a resonance frequency of <NUM>.

<FIG> and <FIG> show distribution of currents and electric fields of the antenna apparatus simulation provided in Embodiment <NUM>.

<FIG> shows distribution of currents and electric fields of the MIMO antenna apparatus in the CM slot antenna pattern. It can be learned from <FIG> that the currents are distributed in a same direction on two sides of the gap <NUM>, but the electric fields are distributed in opposite directions on two sides of the gap <NUM>. The currents and electric fields shown in <FIG> may be respectively referred to as currents and electric fields in the CM slot antenna pattern. The currents and the electric fields in the CM slot antenna pattern are generated when the slots on two sides of the gap <NUM> each work in the <NUM>/<NUM> wavelength mode. The currents are weak in the gap <NUM> of the slot <NUM>, and are strong at both ends of the slot <NUM>. The electric fields are strong in the gap <NUM> of the slot <NUM>, and are weak at both ends of the slot <NUM>.

<FIG> shows distribution of currents and electric fields of the MIMO antenna apparatus in the DM slot antenna pattern. It can be learned from <FIG> that the currents are distributed in opposite directions on two sides of the gap <NUM>, but the electric fields are distributed in a same direction on two sides of the gap <NUM>. The currents and electric fields shown in <FIG> may be respectively referred to as currents and electric fields in the DM slot antenna pattern. The currents and electric fields in the DM slot antenna pattern are generated when the entire slot <NUM> works in the <NUM>/<NUM> wavelength mode. The currents are weak in the gap <NUM> of the slot <NUM>, and are strong at both ends of the slot <NUM>. The electric fields are strong in the gap <NUM> of the slot <NUM>, and are weak at both ends of the slot <NUM>.

It can be learned that, in the antenna design solution provided in Embodiment <NUM>, the slot is formed between the metal frame <NUM> and the PCB ground layer. Through symmetric feeding and anti-symmetric feeding, the slot is excited to generate two low-frequency (the operating frequency band is near LTE B5) slot antenna patterns: the CM slot antenna pattern and the DM slot antenna pattern. In this way, double resonance in the CM slot antenna pattern and the DM slot antenna pattern can be implemented, and characteristics such as high isolation and a low ECC of the MIMO antenna can be achieved in a low frequency wideband. In addition, in Embodiment <NUM>, a form of co-feeding may be used, that is, two slot antenna patterns share a same slot antenna radiator, to save antenna design space.

As shown in <FIG>, the bridge structure <NUM> may be a T-shaped structure. The bridge structure <NUM> is connected to the slots on the two sides of the gaps <NUM>, and a suspended metal frame 11a between the gaps <NUM>. Specifically, the T-shaped structure may include a horizontal stub and a vertical stub. Two ends (that is, a first end <NUM>-<NUM> and a second end <NUM>-<NUM>) of the horizontal stub may be respectively connected to the slots on the two sides of the gaps <NUM>. Specifically, the first end <NUM>-<NUM> is connected to the first part of the side edge <NUM>-<NUM>, and the second end <NUM>-<NUM> may be connected to the second part of the side edge <NUM> -<NUM>. The vertical stub may be connected to the suspended metal frame 11a. It is not limited to the suspended metal frame 11a between two gaps <NUM>. Thegapre may alternatively be more gaps <NUM>, to obtain more suspended metal frames through division.

In this way, a matching device in an anti-symmetric feeding structure in the CM slot antenna pattern can be adjusted, so that double resonance in the CM slot antenna pattern can be implemented. Moreover, in this variation, the "bridge" structure used in the DM slot antenna pattern can be optimized, and double resonance in the DM slot antenna pattern can also be implemented.

Simulation of the slot antenna shown in <FIG> is described below with reference to the accompanying drawings.

<FIG> respectively show reflection coefficients, isolation, and antenna efficiency of the MIMO antenna apparatus.

<FIG> shows a group of reflection coefficient curves of the simulation of the MIMO antenna apparatus. "<NUM>", "<NUM>", "<NUM>", and "<NUM>" represent different resonances. The MIMO antenna apparatus may generate the resonance "<NUM>" and the resonance "<NUM>" near <NUM>, and may further generate the resonance "<NUM>" and the resonance "<NUM>" near <NUM>. The resonance "<NUM>" and the resonance "<NUM>" are resonances in the CM slot antenna pattern, and the resonance "<NUM>" and the resonance "<NUM>" are resonances in the DM slot antenna pattern. In addition to the <NUM> and <NUM> frequency bands shown in <FIG>, the MIMO antenna apparatus may further generate double resonance in another frequency band. This may be specifically set by adjusting the size of the slot <NUM>.

<FIG> shows isolation between a double resonance CM slot antenna pattern and a double resonance DM slot antenna pattern of the MIMO antenna apparatus. It can be learned that the isolation between the two slot antenna patterns can be up to more than <NUM> dB.

<FIG> shows radiation efficiency and system efficiency of two slot antenna patterns of the MIMO antenna apparatus. It can be learned that a bandwidth of the antenna apparatus shown in <FIG> is larger than a bandwidth of the antenna apparatus shown in <FIG>, and both the double resonance CM slot antenna pattern and the double resonance DM slot antenna pattern have good radiation efficiency and system efficiency.

<FIG> show distribution of currents and electric fields of the slot antenna simulation shown in <FIG>.

<FIG> shows distribution of currents and electric fields of the MIMO antenna apparatus in the double resonance CM slot antenna pattern. As shown in <FIG>, the currents in the double resonance CM slot antenna pattern include a current of the resonance "<NUM>" (<NUM>) and a current of the resonance "<NUM>" (<NUM>). The electric fields in the double resonance CM slot antenna pattern include an electric field of the resonance "<NUM>" (<NUM>) and an electric field of the resonance "<NUM>" (<NUM>). It can be learned from <FIG> that the currents of the resonance "<NUM>" and the resonance "<NUM>" are distributed in a same direction on two sides of the gap <NUM>, but the electric fields of the resonance "<NUM>" and the resonance "<NUM>" are distributed in opposite directions on two sides of the gap <NUM>.

<FIG> shows distribution of currents and electric fields of the MIMO antenna apparatus in the double resonance DM slot antenna pattern. As shown in <FIG>, the currents in the double resonance CM slot antenna pattern include a current of the resonance "<NUM>" (<NUM>) and a current of the resonance "<NUM>" (<NUM>). The electric fields in the double resonance CM slot antenna pattern include an electric field of the resonance "<NUM>" (<NUM>) and an electric field of the resonance "<NUM>" (<NUM>). It can be learned from <FIG> that the currents of the resonance "<NUM>" and the resonance "<NUM>" are distributed in opposite directions on two sides of the gap <NUM>, but the electric fields of the resonance "<NUM>" and the resonance "<NUM>" are distributed in a same direction on two sides of the gap <NUM>.

<FIG> and <FIG> are a diagram of radiation directions of the slot antenna simulation shown in <FIG>. An ECC is calculated according to the diagram of the radiation directions shown in <FIG> and <FIG>. An ECC of the double resonance CM slot antenna pattern and the double resonance DM slot antenna pattern is as low as <NUM> in the resonance "<NUM>" (<NUM>), and an ECC of the double resonance CM slot antenna pattern and the double resonance DM slot antenna pattern is as low as <NUM> in the resonance "<NUM>" (<NUM>).

It can be learned that in the slot antenna shown in <FIG>, the double resonance CM slot antenna pattern and the double resonance DM slot antenna pattern can be implemented by deforming the bridge structure <NUM>, to further increase a frequency bandwidth, and achieve high isolation and a low ECC.

A MIMO antenna apparatus provided in this embodiment may excite, through symmetric feeding and anti-symmetric feeding, a slot to generate two medium- and high-frequency (an operating frequency band is near Wi-Fi <NUM>) slot antenna patterns: a CM slot antenna pattern and a DM slot antenna pattern.

<FIG> show the MIMO antenna apparatus according to Embodiment <NUM>. <FIG> is a front-side view (front-side view) of the MIMO antenna apparatus, and <FIG> is a simplified diagram of a front-side structure of the MIMO antenna apparatus. <FIG> is a back-side view (back-side view) of the MIMO antenna apparatus, and <FIG> is a simplified diagram of a back-side structure of the MIMO antenna apparatus. Herein, the front side is a front side of a PCB <NUM>, and the back side is a back side of the PCB <NUM>. The front-side view shows an anti-symmetric feeding design for the antenna structure, and the back-side view shows a symmetric feeding design for the antenna structure.

The slot <NUM> may be disposed between the PCB <NUM> and a first segment of a metal frame <NUM>. Different from that in Embodiment <NUM>, the slot <NUM> in Embodiment <NUM> is shorter, to form a slot radiator of a smaller size and generate medium- and high-frequency resonance. A length of the slot <NUM> may be less than a first length (for example, <NUM>). For example, as shown in <FIG>, the slot <NUM> may be a strip-shaped slot located at the bottom of the electronic device <NUM>, and the length of the slot <NUM> is <NUM>.

A gap <NUM> may be disposed on a side edge <NUM>-<NUM> that is of the slot <NUM> and that is formed by using the metal frame <NUM>. One gap <NUM> may be disposed on the side edge <NUM>-<NUM>, or a plurality of gaps <NUM> may be disposed on the side edge <NUM>-<NUM>. For example, as shown in <FIG>, thegapre may be one gap <NUM>. The gap <NUM> may be disposed in a middle position on the side edge, or may be disposed away from the middle position.

The feeding point M and the feeding point N may be located on the side edge <NUM> -<NUM>, formed by using the metal frame <NUM>, of the slot <NUM>, and may be specifically separately disposed on two sides of the gap <NUM>. That is, the feeding point M is located on a first part of the side edge <NUM> -<NUM>, and the feeding point N is located on a second part of the side edge <NUM>-<NUM>.

Different from that in Embodiment <NUM>, the bridge structure <NUM> in Embodiment <NUM> may be a U-shaped structure, and two ends of the bridge structure <NUM> may be respectively connected to slots on two sides of the gap <NUM>. A first end <NUM>-<NUM> and a second end <NUM>-<NUM> of the bridge structure <NUM> may be specifically connected to a bottom edge of the metal frame <NUM>.

A size of the antenna apparatus provided in Embodiment <NUM> may be shown in <FIG> or <FIG>, and a width of the slot <NUM> is <NUM>. A width of one gap <NUM> provided at the bottom of the metal frame <NUM> is <NUM>, and lengths of slots on two sides of the gap <NUM> are both <NUM>.

An anti-symmetric feeding structure and a symmetric feeding structure that are the same as those described in Embodiment <NUM> may be used in Embodiment <NUM>. For details, refer to Embodiment <NUM>.

Same as that in Embodiment <NUM>, there may also be two gaps <NUM> in Embodiment 2gap. The bridge structure <NUM> may alternatively be the bridge structure <NUM> described in the extended solution of Embodiment <NUM>.

<FIG> shows a group of reflection coefficient curves of the simulation of the MIMO antenna apparatus. "<NUM>" and "<NUM>" represent different resonances. The MIMO antenna apparatus may generate the resonance "<NUM>" near <NUM>, and may further generate the resonance "<NUM>" near <NUM>. The resonance "<NUM>" is a resonance in the CM slot antenna pattern, and the resonance "<NUM>" is a resonance in the DM slot antenna pattern. Specifically, the resonance " <NUM>" may be generated when the slots on two sides of the gap <NUM> each work in the <NUM>/<NUM> wavelength mode. The resonance "<NUM>" may be generated when the entire slot <NUM> works in the <NUM>/<NUM> wavelength mode. A wavelength mode in which the slot <NUM> generates the resonance "<NUM>" is not limited, and the resonance "<NUM>" may alternatively be generated when the slots on the two sides of the gap <NUM> work in a <NUM>/<NUM> wavelength mode or the like. A wavelength mode in which the slot <NUM> generates the resonance "<NUM>" is not limited, and the resonance "<NUM>" may alternatively be generated when the slot <NUM> works in a <NUM> wavelength mode, a <NUM>/<NUM> wavelength mode, or the like. In addition to the <NUM> frequency band shown in <FIG>, the antenna apparatus provided in Embodiment <NUM> may further generate a resonance in another medium and high frequency band. This may be specifically set by adjusting the size of the slot <NUM>.

<FIG> is a diagram of radiation directions of the slot antenna simulation shown in <FIG>. An ECC is calculated according to the diagram of the radiation directions shown in <FIG>. An ECC of the CM slot antenna pattern and the DM slot antenna pattern near <NUM> may be as low as <NUM>.

It can be learned that, in the antenna design solution provided in Embodiment <NUM>, through symmetric feeding and anti-symmetric feeding, two medium- and high-frequency (an operating frequency band is near Wi-Fi <NUM>) antennas, namely, a CM slot antenna and a DM slot antenna, can be excited on a short slot antenna radiator, to achieve characteristics such as high isolation and a low ECC of the MIMO antenna in a medium- and high-frequency wideband. In addition, in Embodiment <NUM>, a form of co-feeding may be used, that is, two slot antenna modes share a same slot antenna radiator, to save antenna design space.

In the foregoing embodiment, the feeding point M and the feeding point N may be respectively referred to as a first feeding point and a second feeding point. The feeding point S on the bridge structure <NUM> may be referred to as a third feeding point.

In the foregoing embodiment, it is not limited that the feeding point M and the feeding point N are disposed close to the gap. Alternatively, the feeding point M and the feeding point N may be separately disposed close to two ends of the slot <NUM>, as shown in <FIG> and <FIG>.

In the feeding structure in the foregoing embodiment, a size of the "bridge" structure (that is, the bridge structure <NUM>) is large, and some lumped devices (such as a lumped inductor) may be added to reduce the size, as shown in <FIG>. The "bridge" structure is not limited to being implemented by the bridge structure <NUM>, and the "bridge" structure may alternatively be formed by hollowing out the PCB ground layer.

The MIMO antenna apparatus provided in the foregoing embodiment is not limited to being disposed at the bottom of the electronic device <NUM>, and may alternatively be disposed at the top or on a side edge of the electronic device <NUM>, as shown in <FIG>. It can be learned that, compared with a conventional MIMO antenna, the co-feeding slot antenna provided in embodiments of this application can save a lot of space when a <NUM> x <NUM> MIMO antenna is implemented.

The antenna design solution provided in the foregoing embodiment is not limited to being implemented in an electronic device with a metal frame ID. The slot <NUM> mentioned in the foregoing embodiment may alternatively be formed by using a metal middle frame and the PCB <NUM>.

In actual application, a structure of an electronic device is generally difficult to be completely symmetric, and a connection position of a matching network or a "bridge" structure may be adjusted to compensate for the structure imbalance.

In this application, a wavelength in a wavelength mode (for example, a <NUM>/<NUM> wavelength mode or a <NUM>/<NUM> wavelength mode) of an antenna may be a wavelength of a signal radiated by the antenna. For example, a <NUM>/<NUM> wavelength mode of an antenna may generate a resonance in a <NUM> frequency band, and a wavelength in the <NUM>/<NUM> wavelength mode is a wavelength of a signal radiated by the antenna in the <NUM> frequency band. It should be understood that a wavelength of a radiated signal in the air may be calculated as follows: Wavelength = Speed of light/Frequency, where the frequency is a frequency of the radiated signal. A wavelength of a radiated signal in a medium may be calculated as follows: <MAT>, where ε is a relative dielectric constant of the medium, and the frequency is a frequency of the radiated signal.

Claim 1:
An electronic device, wherein the electronic device comprises a printed circuit board PCB (<NUM>) ground layer, a metal frame (<NUM>), and an antenna apparatus, and the antenna apparatus comprises a slot (<NUM>), a first feeding point (M), a second feeding point (N), and a bridge structure (<NUM>), wherein
the slot is formed between the PCB ground layer and a first segment of the metal frame, the first segment of the metal frame comprises a first end and a second end, both ends of the slot are grounded, the slot comprises a first side edge (<NUM>-<NUM>) and a second side edge (<NUM>-<NUM>),
the first side edge is formed by the PCB ground layer, the second side edge is formed by the first segment of the metal frame, the first segment comprises a first part, a second part, and a third part, the first part is located on one side of the third part, the second part is located on the other side of the third part, and the third part comprises a first gap (<NUM>), a second gap (<NUM>), and a suspended segment (11a) located between the first gap and the second gap;
the first feeding point (M) is located on the first part, the second feeding point (N) is located on the second part, and the first feeding point and the second feeding point are respectively connected to a positive electrode and a negative electrode of a feed of the antenna apparatus; and
the bridge structure (<NUM>) comprises a first end (<NUM>-<NUM>) and a second end (<NUM>-<NUM>), the first end is connected to the first part, the second end is connected to the second part, a third feeding point (S) is disposed on the bridge structure, and the third feeding point is connected to the positive electrode of the feed; and
wherein the bridge structure (<NUM>) is further connected to the suspended segment (11a).