Antenna module and electronic device

An antenna module includes a first antenna including a first radiator, a second radiator, a third radiator, a fourth radiator, and a fifth radiator. The first radiator has a first end and a second end opposite to each other. The first end is a first feeding end, and the second radiator, the third radiator and the fourth radiator are connected to the second end of the first radiator. The second radiator has a plurality of bending portions. The fifth radiator is connected to the second radiator, and the fifth radiator has a first ground terminal. The first radiator, the second radiator and the fifth radiator resonate in a first frequency band, the first radiator and the third radiator resonate in a second frequency band, and the first radiator and the fourth radiator resonate in a third frequency band.

CROSS-REFERENCE TO RELATED APPLICATION

This application claims the priority benefit of Taiwan application serial no. 109139010, filed on Nov. 9, 2020. The entirety of the above-mentioned patent application is hereby incorporated by reference herein and made a part of this specification.

BACKGROUND OF THE INVENTION

Field of the Invention

The invention relates to an antenna module and an electronic device, and particularly relates to a multi-frequency antenna module and an electronic device including the frequency band.

Description of Related Art

With the advancement of science and technology, the demand for multi-band antennas has gradually increased. How to develop an antenna capable of coupling multiple frequency bands now becomes an issue to work on.

SUMMARY OF THE INVENTION

An aspect of the invention provides an antenna module which meets the demand for multiple frequency bands.

An aspect of the invention provides an electronic device having the antenna module.

An antenna module according to an aspect of the invention includes a first antenna including a first radiator, a second radiator, a third radiator, a fourth radiator, and a fifth radiator. The first radiator has a first end and a second end opposite to each other. The first end is a first feeding end. The second radiator, the third radiator and the fourth radiator are connected to the second end of the first radiator. The second radiator has a plurality of bending portions. The fifth radiator is connected to the second radiator. The fifth radiator has a first grounding end. The first radiator, the second radiator and the fifth radiator resonate in a first frequency band, the first radiator and the third radiator resonate in a second frequency band, and the first radiator and the fourth radiator resonate in a third frequency band.

According to an embodiment of the invention, the second radiator includes a first segment, a second segment, a third segment, and a fourth segment, the first segment is connected to the second end of the first radiator, the second segment is bent and connected to the first segment, the third segment and the fourth segment are respectively bent and connected to the second segment, and widths of the second segment and the third segment are respectively greater than widths of the first segment and the fourth segment.

According to an embodiment of the invention, the width of the second segment is 2 times to 4 times of the width of the first segment.

According to an embodiment of the invention, the width of the third segment is 1.5 times to 3 times of the width of the first segment.

According to an embodiment of the invention, the first segment of the second radiator and the third radiator extend in directions opposite to each other.

According to an embodiment of the invention, the fourth segment of the second radiator includes a first conductive hole adapted to penetrate through a frame for connection with the fifth radiator.

According to an embodiment of the invention, the fifth radiator is located beside the first radiator and parallel to the first radiator.

According to an embodiment of the invention, the first frequency band ranges between 2400 MHz and 2500 MHz, the second frequency band ranges between 5150 MHz and 5850 MHz, and the third frequency band ranges between 6125 MHz and 7125 MHz.

An electronic device according to an aspect of the invention includes a frame and the antenna module. The frame includes a top surface, a first inclined surface, a first side surface, a bottom surface, a second inclined surface, and a third inclined surface connected with one another. The second inclined surface is located below the top surface and connected with the bottom surface, and the third inclined surface is connected with the top surface. The first antenna is disposed on the top surface, the first inclined surface, the first side surface, the bottom surface, the second inclined surface, and the third inclined surface.

According to an embodiment of the invention, the first radiator extends from the bottom surface to the first side surface, the first feeding end is located on the bottom surface, the second radiator extends from the first side surface and the first inclined surface to the top surface and the third inclined surface, the third radiator is disposed on the first side surface, the fourth radiator is disposed on the first inclined surface, the fifth radiator extends from the bottom surface to the second inclined surface, and the first grounding end is located on the bottom surface.

An antenna module according to an aspect of the invention includes a second antenna including a sixth radiator, a seventh radiator, an eighth radiator, and a ninth radiator. The sixth radiator has a second feeding end. A portion of the seventh radiator is disposed beside and in parallel to a fifth segment of the sixth radiator. The eighth radiator is connected to the seventh radiator. The eighth radiator has a second grounding end. The ninth radiator extends from the sixth radiator. The sixth radiator, the seventh radiator and the eighth radiator resonate in a first frequency band, the sixth radiator resonates in a second frequency band, and a portion of the sixth radiator and the ninth radiator resonate in a third frequency band.

According to an embodiment of the invention, a portion of the eighth radiator is disposed beside and in parallel to a sixth segment of the sixth radiator.

According to an embodiment of the invention, the seventh radiator has a seventh segment and an eighth segment bent to be connected, the seventh segment of the seventh radiator is parallel to the fifth segment of the sixth radiator, and the eighth segment of the seventh radiator is parallel to the sixth segment of the sixth radiator.

According to an embodiment of the invention, the eighth segment of the seventh radiator includes a second conductive hole adapted to penetrate through a frame for connection with the eighth radiator.

According to an embodiment of the invention, the ninth radiator is parallel to the sixth segment of the sixth radiator.

According to an embodiment of the invention, the first frequency band ranges between 2400 MHz and 2500 MHz, the second frequency band ranges between 5150 MHz and 5850 MHz, and the third frequency band ranges between 6125 MHz and 7125 MHz.

An electronic device according to an aspect of the invention includes a frame and the antenna module. The frame includes a top surface, a fourth inclined surface, a second side surface, a bottom surface, and a fifth inclined surface connected with one another. The fifth inclined surface is located below the top surface and connected with the bottom surface. The second antenna is disposed on the top surface, the fourth inclined surface, the second side surface, the bottom surface, the fifth inclined surface.

According to an aspect of the invention, the sixth radiator extends from the bottom surface and the second side surface to the fourth inclined surface, the second feeding end is located on the bottom surface, the seventh radiator extends from the fourth inclined surface to the top surface, the eighth radiator extends from the fifth inclined surface to the bottom surface, and the second grounding end is located on the bottom surface.

Based on the above, in the antenna module according to the embodiments of the invention, the first end of the first radiator is provided with the first feeding end, the second radiator, the third radiator, and the fourth radiator are connected to the second end of the first radiator, the fifth radiator is connected to the second radiator, and the fifth radiator has the first grounding end. The first radiator, the second radiator and the fifth radiator resonate in the first frequency band, the first radiator and the third radiator resonate in the second frequency band, and the first radiator and the fourth radiator resonate in the third frequency band. With the above configuration, the antenna module according to the embodiments of the invention is able to meet the demand for multiple frequency bands.

DESCRIPTION OF THE EMBODIMENTS

The main technical improvement of the latest generation of wireless local area network technology WIFI-6 802.11ax is divided into two stages. The first stage is to use the existing frequency band range of 2.4G and 5G frequency bands to increase the overall transmission rate through increasing the signal processing technology. The second stage is to increase the bandwidth of the actual spectrum used. The original 5G frequency band (5150-5850 MHz) is extended to the 6G frequency band (5925 MHz to 7125 MHz) to increase the usable bandwidth range, which is the so-called WIFI 6E.

At present, the antenna design of products on the market only covers the ranges of 2.4 frequency band and 5G frequency band. In order to meet the bandwidth requirements of WIFI 6E, it is necessary to extend the bandwidth range of the 5G high frequency band to the 6G frequency band by expanding from the original 1 GHz to 2 GHz. In this way, it is necessary to double the bandwidth range, which greatly increases the difficulty of antenna design. The following will introduce an antenna module100that meets the bandwidth requirements of WIFI 6E and an electronic device10having the antenna module100.

FIG. 1is a schematic top view illustrating that an antenna module according to an embodiment of the invention is disposed on a frame.FIG. 2is a schematic view of the left side ofFIG. 1.FIG. 3is a schematic view of the right side ofFIG. 1.FIG. 4is a schematic bottom view ofFIG. 1.FIG. 5Ais a schematic perspective view ofFIG. 1.FIG. 5Bis a schematic view of a first antenna ofFIG. 5A.FIG. 5Cis a schematic view of a second antenna ofFIG. 5A.FIG. 6Ais a schematic perspective view ofFIG. 1from another perspective.FIG. 6Bis a schematic view of a first antenna ofFIG. 6A.FIG. 6Cis a schematic view of a second antenna ofFIG. 6A.FIG. 7Ais a schematic perspective view ofFIG. 1from another perspective.FIG. 7Bis a schematic view of a first antenna ofFIG. 7A.FIG. 7Cis a schematic view of a second antenna ofFIG. 7A.FIG. 8Ais a schematic perspective view ofFIG. 1from another perspective.FIG. 8Bis a schematic view of a first antenna ofFIG. 8A.FIG. 8Cis a schematic view of a second antenna ofFIG. 8A.

It should be noted that, inFIGS. 1 to 8C, in order to clearly illustrate the antenna module100, the case of the electronic device10as well as other structures thereof are omitted, and only the antenna module100and a frame20or only the antenna module100is illustrated.

Referring toFIG. 1, the antenna module100of the embodiment is disposed on the frame20of the electronic device10. The antenna module100includes a first antenna105and a second antenna155. Each of the first antenna105and the second antenna155is able to resonate in a first frequency band, a second frequency band, and a third frequency band. In other words, even though the drawing illustrates that the first antenna105and the second antenna155are disposed on the frame20, it is possible to dispose only the first antenna105on the frame20while meeting the multiple frequency demand in other embodiments.

In the embodiment, the first frequency band ranges between 2400 MHz and 2500 MHz, the second frequency band ranges between 5150 MHz and 5850 MHz, the third frequency band ranges between 6125 MHz and 7125 MHz, which meet the bandwidth requirement of WIFI 6E. Of course, the ranges of the first frequency band, the second frequency band, and the third frequency band are not limited to the above.

Referring toFIGS. 5B, 6B, and 7B, in the embodiment, the first antenna105includes a first radiator110(FIG. 7B), a second radiator120(FIG. 6B), a third radiator130(FIG. 6B), a fourth radiator140(FIG. 6B), and a fifth radiator150(FIG. 7B).

Specifically, in the embodiment, the first radiator110has a first end112(FIG. 7B) and a second end114(FIG. 6B) opposite to each other. The first end112is a first feeding end (position F1). As shown inFIG. 6B, the second radiator120, the third radiator130, and the fourth radiator140are connected to the second end114of the first radiator110.

The second radiator120has a plurality of bending portions. Specifically, the second radiator120includes a first segment121, a second segment122, a third segment123, and a fourth segment124. The first segment121of the second radiator120is connected to the second end of the first radiator110, and the first segment121of the second radiator120and the third radiator130extend in directions opposite to each other. The fourth radiator140extends, in a portion, in the direction toward the first segment121of the second radiator120and the third radiator130and then extends beside and in parallel to the third radiator130.

As viewed from the perspective ofFIG. 6B, the first segment121of the second radiator120extends horizontally, and the second segment122of the second radiator120is bent to be connected to the first segment121and extend in the vertical direction. A width W2of the second segment122is greater than a width W1of the first segment121. In the embodiment, the width W2of the second segment122is 2 times to 4 times of the width W1of the first segment121.

The third segment123and the fourth segment124are respectively bent to be connected to the top end of the second segment122. A width W3of the third segment123is greater than the width W1of the first segment121. In the embodiment, the width W3of the third segment123is 1.5 times to 3 times of the width W1of the first segment121. In addition, the width W2of the second segment122and the width W3of the third segment123are also greater than the width of the fourth segment124.

As shown inFIGS. 7B and 8B, the fifth radiator150is connected to the second radiator120. Specifically, the fourth segment124of the second radiator120includes a first conductive hole125adapted to penetrate through the frame20for connection with the fifth radiator150. The fifth radiator150has a first grounding end (position G1). In the embodiment, the fifth radiator150is located beside the first radiator110and parallel to the first radiator110.

As shown inFIG. 7B, in the embodiment, the lengths of the first radiator110, the second radiator120, and the fifth radiator150(positions F1, C1, D1, E1, and G1) range between 0.23 times and 0.28 times of the wavelength of the first frequency band (such as 0.277 times of the wavelength, i.e., 38.6 mm). Accordingly, the first radiator110, the second radiator120, and the fifth radiator150(positions F1, C1, D1, E1, and G1) resonate in the first frequency band.

In addition, in the embodiment, as shown inFIG. 6B, the width W2of the second segment122is greater than the width W1of the first segment121, and/or the width W3of the third segment123is greater than the width W1of the first segment121. With such design, the first frequency band may be provided with a greater bandwidth.

Referring toFIG. 7Bagain, the lengths of the first radiator110and the third radiator130(positions F1, B1) range between 0.25 times and 0.35 times of the wavelength of the second frequency band (such as 0.31 times of the wavelength, i.e., 16.8 mm). Accordingly, the first radiator110and the third radiator130(positions F1, B1) resonate in the second frequency band.

The lengths of the first radiator110and the fourth radiator140(positions F1, A1) range between 0.25 times and 0.35 times of the wavelength of the third frequency band (such as 0.29 times of the wavelength, i.e., 13.6 mm). Accordingly, the first radiator110and the fourth radiator140(positions F1, A1) resonate in the third frequency band.

Referring toFIGS. 1, 2, 4, 5A, 6A, and 7Aagain, in this embodiment, the frame20includes a top surface21(FIGS. 1, 5A), a first inclined surface22(FIG. 6A), a first side surface23(FIG. 6A), a bottom surface24(FIG. 8A), a second inclined surface25(FIG. 8A), and a third inclined surface26(FIG. 5A) connected with one another. The second inclined surface25is located below the top surface21and connected to the bottom surface24, and the third inclined surface26is connected to the top surface21. The first antenna105is disposed on the top surface21, the first inclined surface22, the first side surface23, the bottom surface24, the second inclined surface25, and the third inclined surface26.

Specifically, as shown inFIGS. 8A and 6A, the first radiator110extends from the bottom surface24to the first side surface23, and the first feeding end is located on the bottom surface24. As shown inFIGS. 6A and 5A, the second radiator120extends from the first side surface23and the first inclined surface22to the top surface21and the third inclined surface26. The third radiator130is disposed on the first side surface23, and the fourth radiator140is disposed on the first inclined surface22. As shown inFIG. 8A, the fifth radiator150extends from the bottom surface24to the second inclined surface25, and the first grounding end is located on the bottom surface24. As shown inFIGS. 5A and 8A, the second radiator120is connected to the fifth radiator150through the first conductive hole125penetrating through the frame20.

With the above configuration, the first antenna105may be disposed on different surfaces of the frame20according to the shape of the frame20without an extra carrier plate. Thus, the first antenna105is space-efficient and applicable for multiple frequency bands.

In the following, the second antenna155is described. Referring toFIGS. 5C, 6C, 7C and 8C, in the embodiment, the second antenna155includes a sixth radiator160(FIG. 7C), a seventh radiator170(FIG. 7B), an eighth radiator180(FIG. 6C), and a ninth radiator190(FIG. 7C).

In the embodiment, the sixth radiator160includes a fifth segment and a sixth segment164perpendicular to the fifth segment162. The sixth radiator160has a second feeding end (FIG. 8C) located at the sixth segment164.

As shown inFIG. 7C, a portion of the seventh radiator170is disposed beside and in parallel to the fifth segment162of the sixth radiator160. Specifically, the seventh radiator170has a seventh segment172and an eighth segment174bent to be connected. The seventh segment172of the seventh radiator170is parallel to the fifth segment162of the sixth radiator160, and the eighth segment174of the seventh radiator170is parallel to the sixth segment164of the sixth radiator160and extends in a direction away from the sixth segment164.

As shown inFIG. 6C, the eighth segment174of the seventh radiator170includes a second conductive hole176adapted to penetrate through the frame20for connection with the eighth radiator180. Hence, the eighth radiator180is connected to the seventh radiator. The eighth radiator180has a second grounding end. A portion of the eighth radiator180is disposed beside and in parallel to the sixth segment164of the sixth radiator160.

As shown inFIG. 7C, the ninth radiator190extends vertically from the fifth segment162of the sixth radiator160and is parallel to the sixth segment164of the sixth radiator160.

In the embodiment, the lengths of the sixth radiator160, the seventh radiator170, and the eighth radiator180(positions F2, A2, C2, D2, and G2) range between 0.25 times and 0.3 times of the wavelength of the first frequency band (such as 0.283 times of the wavelength, i.e., 39.1 mm). Accordingly, the sixth radiator160, the seventh radiator170, and the eighth radiator180(positions F2, A2, C2, D2, and G2) resonate in the first frequency band.

The length of the sixth radiator160(positions F2, A2) ranges between 0.25 times and 0.3 times of the wavelength of the second frequency band (such as 0.32 times of the wavelength, i.e., 17.3 mm). Accordingly, the sixth radiator160(positions F2, A2) resonates in the second frequency band.

The lengths of a portion of the sixth radiator160and the ninth radiator190(positions F2, B2) range between 0.25 times and 0.3 times of the wavelength of the third frequency band (such as 0.33 times of the wavelength, i.e., 15.8 mm). Accordingly, the portion of the sixth radiator160and the ninth radiator190(positions F2, B2) resonate in the third frequency band.

Referring toFIGS. 1, 2, 4, 5A, 6A, and 7Aagain, in this embodiment, the frame20includes the top surface21(FIGS. 1, 5A), a fourth inclined surface27(FIG. 7A), a second side surface28(FIG. 7A), the bottom surface24(FIG. 8A), and a fifth inclined surface29(FIG. 8A) connected with one another. The fifth inclined surface29is located below the top surface21and connected to the bottom surface24(FIG. 8A). The second antenna155is disposed on the top surface21, the fourth inclined surface27, the second side surface28, the bottom surface24, and the fifth inclined surface25.

Specifically, as shown inFIGS. 8A and 7A, the sixth radiator160extends from the bottom surface24and the second side surface28to the fourth inclined surface27, and the second feeding end is located on the bottom surface24. As shown inFIG. 7A, the seventh radiator170extends from the fourth inclined surface27to the top surface21. The seventh radiator170is connected to the eighth radiator180via the second conductive hole176. As shown inFIG. 8A, the eighth radiator180extends from the fifth inclined surface29to the bottom surface24, and the second grounding end is located on the bottom surface24.

FIG. 9is a diagram illustrating a relationship between frequency and S parameter of the antenna module ofFIG. 1. Referring toFIG. 9, the first antenna105and the second antenna155have the S parameters (S11, S22) less than −10 in the first frequency band, the second frequency band, and the third frequency band and thus exhibit favorable performance.

FIG. 10is a diagram illustrating a relationship between frequency and isolation of the antenna module ofFIG. 1. Referring toFIG. 10, the first antenna105and the second antenna155exhibit an isolation less than −10 dB and thus render favorable performance.

In addition, the antenna average efficiency of the first antenna105at 2.4 GHz is 54.67%, −2.39 dB. The antenna efficiency at 5 GHz is 61.19%, −2.1 dB. The antenna efficiency at 6 GHz is 49.21%, −3.06 dB. The antenna average efficiency of the second antenna155at 2.4 GHz is 54.86%, −2.66 dB. The antenna efficiency at 5 GHz is 56.84%, −2.45 dB. The antenna efficiency at 6 GHz is 42.02%, −3.76 dB. The first antenna110and the second antenna120exhibit antenna efficiencies all greater than 45% in the aforementioned frequency bands, and therefore exhibit favorable antenna radiation characteristics.

Based on the above, in the antenna module according to the embodiments of the invention, the first end of the first radiator is provided with the first feeding end, the second radiator, the third radiator, and the fourth radiator are connected to the second end of the first radiator, the fifth radiator is connected to the second radiator, and the fifth radiator has the first grounding end. The first radiator, the second radiator and the fifth radiator resonate in the first frequency band, the first radiator and the third radiator resonate in the second frequency band, and the first radiator and the fourth radiator resonate in the third frequency band. With the above configuration, the antenna module according to the embodiments of the invention is able to meet the demand for multiple frequency bands.