CN111769362B

CN111769362B - Antenna module and electronic equipment

Info

Publication number: CN111769362B
Application number: CN202010653027.6A
Authority: CN
Inventors: 赵宁
Original assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Current assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Priority date: 2020-07-08
Filing date: 2020-07-08
Publication date: 2021-07-23
Anticipated expiration: 2040-07-08
Also published as: CN111769362A

Abstract

The application discloses antenna module and electronic equipment belongs to antenna technical field. The antenna module includes: a metal ground plate; the radiation device is arranged opposite to the metal grounding plate and is electrically connected with the metal grounding plate; the coupling device is arranged between the radiation device and the metal grounding plate; the signal feeder line is electrically connected with the coupler and used for inputting signals to the coupling device; the coupling device is used for exciting the radiation device to generate an inverted F resonance mode when the signal feeder feeds a signal of a first frequency band; the coupling device is also used for exciting the radiation device to generate a target resonance mode when the signal feeder feeds the signal of the second frequency band; the target resonant mode is different from the inverted-F resonant mode. Signals of different frequency bands are input into the coupling device, resonance modes of different modes are excited in the radiation device, one antenna module works under different resonance frequency bands, redundant antennas are prevented from being designed in the electronic equipment, and the space utilization rate of the electronic equipment is improved.

Description

Antenna module and electronic equipment

Technical Field

The present application relates to the field of antenna technology, and in particular, to an antenna module and an electronic device.

Background

With the rapid development of the antenna technology field, an antenna for providing services such as voice call service and network connection is required in a terminal.

At present, because network systems and used frequency bands adopted by various network operators are different, a terminal needs to support communication services of various frequency bands in a communication process. In the related art, in order to support communication services of more frequency bands, various antennas are arranged on a frame of a terminal, and a circuit switch is added between a feed end or a branch of the antenna in the terminal and a ground plate, so that different antennas are switched to use, thereby realizing the multi-frequency coverage effect of the antenna in the terminal.

For the above technical scheme of designing the circuit switch, as the frequency bands in which the terminal can operate are more and more, more antennas need to be designed in the terminal, which easily causes the problems of antenna congestion in the terminal, low utilization rate of terminal space, and the like.

Disclosure of Invention

The embodiment of the application provides an antenna module and electronic equipment, which can avoid redundant antenna design in a terminal, reduce the number of antennas and improve the utilization rate of space in the terminal. The technical scheme is as follows:

in one aspect, an embodiment of the present application provides an antenna module, where the antenna module includes:

a metal ground plate;

the radiation device is opposite to the metal grounding plate and is electrically connected with the metal grounding plate;

a coupling device disposed between the radiating device and the metallic ground plate;

the signal feeder line is electrically connected with the coupler and used for inputting signals to the coupling device;

the coupling device is used for exciting the radiation device to generate an inverted F resonance mode when the signal feeder feeds a signal of a first frequency band;

the coupling device is further used for exciting the radiation device to generate a target resonance mode when the signal feeder feeds a signal of a second frequency band; the target resonant mode is different from the inverted-F resonant mode.

In another aspect, an embodiment of the present application provides an electronic device, which includes at least one antenna module according to the above aspect.

The beneficial effects brought by the technical scheme provided by the embodiment of the application at least comprise:

the antenna module comprises a coupling device, a radiation device and a metal grounding plate, wherein the coupling device is arranged between the radiation device and the metal grounding plate and is electrically connected with a signal feeder, signals are input into the coupling device by utilizing the signal feeder, and the radiation device is excited to generate resonance in a corresponding mode through mutual coupling between the coupling device and the radiation device. Which comprises the following steps: when a signal of a first frequency band is input into the coupling device from the signal feeder, the radiation device is excited to generate an inverted F resonance mode; when a signal of a second frequency band is input into the coupling device by the signal feeder, the radiating device is excited to generate a target resonance mode; the target resonant mode is different from the inverted-F resonant mode. This application excites the resonant mode of different modes in the radiating element through the signal to coupling element input different frequency channels, has realized that an antenna module can work under the resonant frequency channel of difference, has avoided designing unnecessary antenna on the metal frame at terminal, has reduced the quantity that sets up the antenna in the terminal, has improved the space utilization at terminal.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

Fig. 1 is a schematic view of an application scenario of an electronic device for transmitting data according to an exemplary embodiment of the present application;

fig. 2 is a schematic structural diagram of an antenna module according to an exemplary embodiment of the present application;

fig. 3 is a side view of an antenna module of fig. 2 in accordance with an exemplary embodiment of the present application;

fig. 4 is a schematic structural diagram of an antenna module according to an exemplary embodiment of the present application;

FIG. 5 is a schematic diagram of a coupling device according to an exemplary embodiment of the present application;

fig. 6 is a schematic structural diagram of an antenna module according to an exemplary embodiment of the present application;

FIG. 7 is a schematic illustration of the shape of several radiation slots to which an exemplary embodiment of the present application relates;

fig. 8 is a schematic structural diagram of an antenna module according to an exemplary embodiment of the present application;

fig. 9 is a schematic structural diagram of another antenna module according to an exemplary embodiment of the present application;

fig. 10 is a schematic structural diagram of an antenna module according to an exemplary embodiment of the present application;

FIG. 11 is a schematic current diagram of a radiating device according to an exemplary embodiment of the present application generating a quarter-wave resonant frequency band;

fig. 12 is a schematic current diagram of a radiation device according to an exemplary embodiment of the present application for generating a resonant frequency band of one-half wavelength;

FIG. 13 is a current schematic diagram of a radiating device according to an exemplary embodiment of the present application for producing a resonant frequency band at one-eighth wavelength;

fig. 14 is a graph illustrating a change in reflection coefficient of an antenna module of fig. 4 according to an exemplary embodiment of the present application;

fig. 15 is a graph illustrating the system efficiency and radiation efficiency of an antenna module of fig. 4 according to an exemplary embodiment of the present application;

fig. 16 is a schematic structural diagram of an electronic device according to an exemplary embodiment of the present application.

Detailed Description

Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present application, as detailed in the appended claims.

The scheme provided by the application can be used in a terminal used in daily life, and in a real scene of multi-band application when an antenna in the terminal is designed, for convenience of understanding, some terms and application scenes related to the embodiment of the application are first briefly introduced below.

MIMO (Multiple-Input Multiple-Output) technology: the method is a technology for performing space diversity by using a plurality of transmitting antennas and receiving antennas at a transmitting end and a receiving end respectively, adopts a discrete multi-antenna, and can decompose a communication link into a plurality of parallel sub-channels, thereby improving the capacity of transmitting or receiving signals.

In daily life, people can use electronic equipment to work, study, entertain, and the like. The user may transmit various data through an antenna in the electronic device, for example, the user may send information such as a picture and a video taken by the user to other electronic devices, or the user may perform a voice call, a video call, and the like with other users through the electronic device to transmit voice data or video data.

Referring to fig. 1, a schematic view of an application scenario of an electronic device for transmitting data according to an exemplary embodiment of the present application is shown. As shown in fig. 1, a number of electronic devices 110 are included.

Alternatively, the electronic device 110 is a terminal to which an antenna designed to transmit signals may be mounted. For example, the electronic device may be a mobile phone, a tablet computer, an e-book reader, smart glasses, a smart watch, an MP3 player (Moving Picture Experts Group Audio Layer III, motion Picture Experts Group Audio Layer IV, motion Picture Experts Group Audio Layer 4), an MP4 player, a notebook computer, a laptop computer, a desktop computer, and the like.

In the environment shown in fig. 1, the electronic device needs to operate in various data transmission scenarios, and in order to adapt to data transmission in various frequency bands, an antenna designed in the electronic device may change its operating state accordingly, so as to operate in the corresponding frequency band. For example, the electronic device may use its own metal frame as an antenna, and set up a gap on the metal frame, so as to form a plurality of antennas, and transmit data using the plurality of antennas (may also be regarded as a MIMO antenna).

At present, any one antenna arranged in the electronic device often can meet the requirement of a corresponding resonant frequency band, the resonant frequency band met by the antenna is single, and if the electronic device wants to realize the working modes of multiple resonant frequency bands, different antennas need to be arranged in the electronic device to meet the requirement. Because the space in the electronic equipment is limited, in order to set up different antennas, will bring the occupation to the space of electronic equipment unavoidably, cause the problem that the internal space utilization of electronic equipment is low.

In order to avoid designing redundant antennas in the electronic equipment, reduce the number of the antennas and improve the utilization rate of space in the electronic equipment, the application provides a solution, and the effect of covering multiple frequency bands for the antennas used for transmitting signals in the electronic equipment can be realized under the condition that redundant antenna modules are not arranged. Please refer to fig. 2, which illustrates a schematic structural diagram of an antenna module according to an exemplary embodiment of the present application. The antenna module provided by the embodiment of the application can be applied to the electronic device in the application scenario shown in fig. 1. As shown in fig. 2, the antenna module includes: a coupling device 201, a radiating device 202 and a metallic ground plate 203;

the radiation device 202 is disposed opposite to the metal ground plate 203 and electrically connected thereto. As shown in fig. 2, the radiation device 202 is electrically connected to the metal ground plate 203 through the ground body 204, and the first surface of the radiation device 202 is opposite to the second surface of the metal ground plate 203.

Optionally, the coupling device 201 is disposed between the radiation device 202 and the metal ground plate 203, that is, between the first surface of the radiation device 202 and the second surface of the metal ground plate 203, and there is also a coupling distance between the coupling device 201 and the radiation device 202, and the coupling device 201 is used for coupling with the radiation device 202. Referring to fig. 3, a side view of an antenna module of an exemplary embodiment of the present application is shown in relation to fig. 2. Wherein the side view direction of the side view shown in fig. 3 is the direction of the arrow in fig. 2. As shown in fig. 3, a coupling device 301, a radiation device 302 and a metal grounding plate 303 are included. As can be seen from fig. 3, a coupling distance 304 exists between the coupling device 301 and the radiation device 302, and the size of the coupling distance 304 may be determined according to the practical engineering debugging.

In fig. 3, a signal feed line 305 and a ground body 306 are further included, the coupling device 301 is electrically connected to the signal feed line 305, and the signal feed line 305 is used for inputting a signal to the coupling device 301, so that the antenna module operates. Illustratively, the signal feed line 305 extends through the metallic ground plane 303 to dispose the coupling device 301 between the radiating device 302 and the metallic ground plane 303. The radiator element 302 is electrically connected to the metal ground plate 303 through the ground body 306.

When signal feed 305 inputs different signals to coupling device 301, radiating device 302 may excite different modes of resonance. Optionally, the excitation radiating element generates an Inverted-F (IFA) resonant mode when the signal feeder feeds a signal in the first frequency band; when the signal feeder feeds the signal of the second frequency band, the excitation radiation device generates a target resonance mode; wherein the target resonant mode is different from the inverted-F resonant mode.

In summary, the antenna module provided by the present application includes a coupling device, a radiation device, and a metal ground plate, wherein the coupling device is disposed between the radiation device and the metal ground plate, and electrically connected to the signal feeder, and inputs a signal into the coupling device by using the signal feeder, and the coupling device and the radiation device are coupled to each other to excite the radiation device to generate a resonance in a corresponding mode. Which comprises the following steps: when a signal of a first frequency band is input into the coupling device from the signal feeder, the radiation device is excited to generate an inverted F resonance mode; when a signal of a second frequency band is input into the coupling device by the signal feeder, the radiating device is excited to generate a target resonance mode; the target resonant mode is different from the inverted-F resonant mode. This application excites the resonant mode of different modes in the radiating element through the signal of inputing different frequency channels to coupling element, has realized that an antenna module can work under the resonant frequency channel of difference, has avoided designing unnecessary antenna on electronic equipment's metal frame, has reduced the quantity that sets up the antenna among the electronic equipment, has improved electronic equipment's space utilization.

In a possible implementation manner, in order to implement that after a specific frequency band signal is input to the coupling device, through mutual coupling between the coupling device and the radiation device, a resonance frequency band with a corresponding wavelength is generated on the radiation device, taking a frequency band with a first frequency band of 2.55GHz to 2.65GHz and a frequency band with a second frequency band of 3.3GHz to 3.36GHz, which are input to the coupling device in the terminal as an example, the radiation device generates resonance frequency bands with different modes, so that the antenna module operates in different resonance frequency bands. The above-described arrangements shown in fig. 2 and 3 will now be described by way of example in several cases.

Please refer to fig. 4, which illustrates a schematic structural diagram of an antenna module according to an exemplary embodiment of the present application. The antenna module provided by the embodiment of the application can be applied to the electronic device in the application scenario shown in fig. 1. As shown in fig. 4, the antenna module includes: a coupling device 401, a radiation device 402, and a metallic ground plate 403;

the radiation device 402 is disposed opposite to the metal ground plate 403 and electrically connected thereto. As shown in fig. 4, the first side 402a of the radiation device 402 is electrically connected to the metal ground plate 403 through the ground body 404, and the first surface of the radiation device 402 is opposite to the second surface of the metal ground plate 403, wherein the radiation device is configured to generate a resonant frequency band. The height of the grounding body 404 may also be determined according to the practical engineering, for example, the height of the grounding body 404 may be 2 mm.

Optionally, the coupling device 401 is disposed between the radiation device 402 and the metal ground plate 403, for example, between a first surface of the radiation device 402 and a second surface of the metal ground plate 403, there is also a coupling distance between the coupling device 401 and the radiation device 402, and the coupling device 401 is configured to couple with the radiation device 402. There is a coupling distance between the coupling device 401 and the radiation device 402. The illustration of the coupling distance can refer to the side view shown in fig. 3, and is not repeated here.

In fig. 4, a signal feed line 405 is further included, the coupling device 401 is electrically connected to the signal feed line 405, and similarly, the signal feed line 405 penetrates the metal ground plate 403 to dispose the coupling device 401 between the radiation device 402 and the metal ground plate 403. Signal feed line 405 is used to input a signal to coupling device 401. Wherein the radiating element 402 may excite different modes of resonance when different signals are input to the coupling element 401 by the signal feed 405. Optionally, the coupling device 401 is configured to excite the radiation device to generate an inverted F resonant mode when the signal feeder 405 feeds the signal in the first frequency band; the coupling device is also used for exciting the radiation device to generate a target resonance mode when the signal feeder feeds the signal of the second frequency band; wherein the target resonant mode is different from the inverted-F mode.

Optionally, the center of the coupling device 401 has a first offset distance in the first direction with respect to the center of the radiating device 402, and the coupling device 401 is further configured to excite the radiating device 402 to generate a quarter-wave inverted-F resonant mode in the first direction when the signal in the first frequency band is coupled to the radiating device 402 through the coupling device 401 when the signal feed line 405 feeds the signal in the first frequency band.

In a possible implementation manner, the first frequency band is a frequency band from 2.55GHz to 2.65 GHz; the length of the first side 402a is one quarter of the wavelength of the electromagnetic wave in the first frequency band. The coupling device 401 is used to excite the radiating device 402 to generate a quarter-wave inverted-F resonant mode in the first direction when the signal feeder 405 feeds a signal in the first frequency band. Optionally, in this application, the length of the first edge 402a of the radiating device 402, which is connected to the metal ground plate 403, may be set to be a quarter of the wavelength of the electromagnetic wave in any one of the first frequency bands (for example, the length of the first edge 402a of the radiating device may be determined by debugging in practical engineering, and the length of the first edge is a quarter of the wavelength of the electromagnetic wave at the operating frequency point of 2.6 GHz), at this time, if the signal input to the coupling device 401 by the signal feeder 405 is a signal in the first frequency band, after the coupling device 401 and the radiating device 402 are coupled to each other, the radiating device 402 may generate a quarter of a resonant frequency band in the first direction.

Optionally, the center of the coupling device 401 is offset from the center of the radiating device 402 by a second offset distance in a second direction, the second frequency band may include the first sub-band, and the coupling device 401 is further configured to excite the radiating device 402 to generate a half-wavelength resonant mode in the second direction when the signal in the first sub-band is coupled to the radiating device 402 through the coupling device 401; wherein the second direction is perpendicular to the first direction. That is, when the second frequency band is the first sub-band, the target resonance mode generated on the radiation device 402 is a one-half wavelength resonance mode generated in the second direction.

In one possible implementation, the first sub-band is a band of 3.3GHz to 3.36 GHz; the radiation device 402 further comprises a second side 402b, the second side 402b of the radiation device 402 is perpendicular to the first side 402a, and the length of the second side 402b is one half of the wavelength of the electromagnetic wave of the first sub-band. Similarly, in the present application, the length of the second side 402b of the radiation device 402 may also be set to be half of the wavelength of the electromagnetic wave in any one of the first sub-bands (for example, the length of the second side of the radiation device 402 is half of the wavelength of the electromagnetic wave at the operating frequency point of 3.3 GHz). At this time, if the signal input to the coupling device 401 by the signal feed line 405 is a signal of the first sub-band, the coupling device 401 and the radiation device 402 are coupled to each other, so that the radiation device 402 can generate a resonant band of one-half wavelength in the second direction. Alternatively, the coupling device 401 may also be voltage biased when the signal feed line 405 feeds a signal of the first sub-band, the direction of the voltage bias being directed along the connection point of the coupling device with the signal feed line towards the end of the coupling device.

Referring to fig. 5, a schematic structural diagram of a coupling device according to an exemplary embodiment of the present application is shown. As shown in fig. 5, which includes a connection point 501 of the coupling device and the signal feed line, and a coupling device end 502, when the coupling device inputs the signal of the first sub-band through the signal feed line, the coupling device is biased, and the direction of the voltage bias generated by the coupling device is as shown by the arrow in fig. 5, i.e. the direction of the voltage bias is directed to the end of the coupling device along the connection point of the coupling device and the signal feed line. After the coupling device is biased, the biased coupling metal plate can be coupled to the radiating element and cause the radiating element to generate a one-half wavelength resonant mode in the second direction.

In one possible implementation, the radiation device includes a radiation slot, the second frequency band further includes a second sub-frequency band, and when the second sub-frequency band (the frequency band of 4.89GHz to 5 GHz) is input into the coupling device by the signal feed line, the coupling device can be further coupled with the radiation device to excite the radiation device to generate a resonant mode along one eighth wavelength of the radiation slot. That is, taking the frequency band of 2.55GHz to 2.65GHz as the first frequency band input to the coupling device in the terminal, and the frequency band of 4.89GHz to 5GHz as the second frequency band as an example, the radiating device generates resonant frequency bands of different modes, so that the antenna module operates in different resonant frequency bands. The above-described arrangements shown in fig. 2 and 3 will now be described by way of example in several cases.

Please refer to fig. 6, which illustrates a schematic structural diagram of an antenna module according to an exemplary embodiment of the present application. The antenna module provided by the embodiment of the application can be applied to the electronic device in the application scenario shown in fig. 1. As shown in fig. 6, the antenna module includes: a coupling device 601, a radiation device 602, and a metal ground plate 603;

the radiator 602 is disposed opposite to the metal ground plate 603 and electrically connected to the metal ground plate. As shown in fig. 6, a first side of the radiation device 602 is electrically connected to the metal ground plate 603 through the grounding body 604, and a first surface of the radiation device 402 is opposite to a second surface of the metal ground plate 403, wherein the radiation device is configured to generate a resonant frequency band. The height of the grounding body 604 may also be determined according to the practical engineering, for example, the height of the grounding body 604 may be 2 mm.

Optionally, the coupling device 601 is disposed between the radiation device 602 and the metal ground plate 603, for example, between the first surface of the radiation device 402 and the second surface of the metal ground plate 403, and a coupling distance exists between the coupling device 601 and the radiation device 602, and the coupling device 601 is configured to couple with the radiation device 602. There is a coupling distance between the coupling device 601 and the radiation device 602. The illustration of the coupling distance can refer to the side view shown in fig. 3, and is not repeated here.

Optionally, the center of the coupling device 601 has a first offset distance in the first direction with respect to the center of the radiating device 602, and the center of the coupling device 601 has a second offset distance in the second direction with respect to the center of the radiating device 602.

In fig. 6, a radiation slot 606 is further disposed on the radiation device 602, and the projection of the coupling device 601 on the radiation device 602 crosses the radiation slot 606, that is, the coupling device 601 is disposed across the radiation slot 606. In the present application, the end of the coupling device 601 is located at one side of the radiation slot at the edge of the radiation device 602, where the end of the coupling device 601 refers to the portion of the coupling device directly below the radiation slot 606 in fig. 6, and correspondingly, the radiation slot at the edge of the radiation device 602 may be the portion of the radiation slot directly above the end of the corresponding coupling device 601.

Optionally, the radiation slot extends from an edge of the radiation device to an inside of the radiation device, and a length of the radiation slot is one eighth of a wavelength of the input electromagnetic wave of the second sub-band. Similarly, in fig. 6, the length of the radiation slot 606 may also be set to be one-eighth of the wavelength of the electromagnetic wave in any one of the second sub-bands (for example, the length of the radiation slot 606 is one-eighth of the wavelength of the electromagnetic wave at the operating frequency point 4.95 GHz).

Alternatively, the shape of the radiation slot 606 may be L-shaped, I-shaped, wave-shaped, etc. Please refer to fig. 7, which illustrates a shape diagram of several radiation slits according to an exemplary embodiment of the present application. As shown in fig. 7, the radiation device 701 includes an L-shaped radiation slot 702, an I-shaped radiation slot 703, a wave-shaped radiation slot 704, and an arc-shaped radiation slot 705. Fig. 7 also includes lengths 702a of the respective radiation slots (where 702a is the sum of 702a1 and 702a 2), 703a, 704a, and 705a, that is, the lengths of the radiation slots referred to in this application refer to the lengths of the radiation slots shown in fig. 7, and the radiation slot shape in fig. 6 is an L shape, so that the length of the radiation slot is one eighth of the wavelength of the electromagnetic wave in the 4.95GHz operating band, which means that the length 701a of the L-shaped radiation slot in fig. 7 is one eighth of the wavelength of the electromagnetic wave in the 4.95GHz operating band.

In a possible implementation manner, the L-shaped radiation slot in fig. 6 is arranged in such a way that the radiation slot 606 includes a first slot section and a second slot section which are connected with each other, the first slot section is arranged along a first direction, an opening is formed on one side of the radiation device close to the coupling device, one end of the second slot section is communicated with one end of the first slot section far away from the opening, and the other end of the second slot section extends along one side perpendicular to the first direction.

In fig. 6, a signal feed line 605 is further included, the coupling device 601 is electrically connected to the signal feed line 605, and similarly, the signal feed line 605 penetrates the metal ground plate 603 to dispose the coupling device 601 between the radiation device 602 and the metal ground plate 603. Optionally, the location where the coupling device 601 is connected to the signal feed 605 forms a feed point, which is located at a side of the first slot segment facing away from the second slot segment. Wherein signal feed line 605 is used to input a signal to coupling device 601. Wherein the radiating element 602 can excite different modes of resonance when different signals are input to the coupling element 601 by the signal feed line 605. Optionally, the coupling device 601 is configured to excite the radiation device to generate an inverted F resonant mode when the signal feeder feeds the signal in the first frequency band; the coupling device is further configured to excite the radiating device to produce a target resonant mode when the signal feeder feeds the signal in the second frequency band, wherein the target resonant mode is different from the inverted-F mode.

In fig. 6, when a signal feeder 605 inputs a signal of a first frequency band into the coupling device 601, the excitation radiating device generates an inverted F resonant mode, which may refer to the description in the embodiment shown in fig. 4, and is not described herein again.

In one possible implementation, when signal feed line 605 inputs a signal of the second sub-band, i.e., a band of 4.89GHz to 5GHz, into coupling device 601. Coupling device 601 may be mutually coupled with radiating device 602, where coupling device 601 spans radiating slot 606, exciting radiating device 602 to produce a resonant mode at one-eighth of a wavelength along radiating slot 606.

In a possible implementation manner, in order to implement that after a specific frequency band signal is input to the coupling device, through mutual coupling between the coupling device and the radiation device, a resonant frequency band with a corresponding wavelength is simultaneously generated on the radiation device, so that the radiation device simultaneously excites resonant frequency bands in different modes, and the antenna module operates in different resonant frequency bands. The above-described arrangements shown in fig. 2 and 3 will now be described by way of example in several cases.

Please refer to fig. 8, which illustrates a schematic structural diagram of an antenna module according to an exemplary embodiment of the present application. The antenna module provided by the embodiment of the application can be applied to the electronic device in the application scenario shown in fig. 1. As shown in fig. 8, the antenna module includes: coupling device 801, radiating device 802, and metallic ground plane 803;

the radiator 802 is disposed opposite to the metal ground plate 803 and electrically connected to the metal ground plate. As shown in fig. 8, a first side 802a of the radiation device 802 is electrically connected to the metal ground plate 803 through the grounding body 804, and a first surface of the radiation device 802 is opposite to a second surface of the metal ground plate 803, wherein the radiation device is configured to generate a resonant frequency band. The height of the grounding body 804 may also be determined according to the practical engineering, for example, the height of the grounding body 804 may be 2 mm.

Optionally, the coupling device 801 is disposed between the radiating device 802 and the metal ground plate 803, for example, between a first surface of the radiating device 802 and a second surface of the metal ground plate 803, and there is a coupling distance between the coupling device 801 and the radiating device 802, and the coupling device 801 is used for coupling with the radiating device 802. There is a coupling distance between the coupling device 801 and the radiating device 802. The illustration of the coupling distance can refer to the side view shown in fig. 3, and is not repeated here.

Optionally, the center of coupling device 801 has a first offset distance in a first direction with respect to the center of radiating device 802, and the center of coupling device 801 has a second offset distance in a second direction with respect to the center of radiating device 802.

Optionally, in fig. 8, a signal feeding line 805 is further included, the coupling device 801 is electrically connected to the signal feeding line 805, and similarly, the signal feeding line 805 penetrates through the metal ground plate 803 to dispose the coupling device 801 between the radiating device 802 and the metal ground plate 803. Signal feed line 805 is used to input a signal to coupling device 801.

In one possible implementation, the antenna module in fig. 8 includes at least two coupling devices and at least two signal feed lines; at least two signal feed lines are used to provide different signals to the at least two coupling devices. First, taking the number of the coupling devices and the signal feeding lines as an example 2, the coupling device 801 in fig. 8 includes a first coupling device 801a and a second coupling device 801b, and the signal feeding line 805 includes a first signal feeding line 805a and a second signal feeding line 805 b. The first coupling device 801a is electrically connected to the first signal feed line 805a, and the second coupling device 801b is electrically connected to the second signal feed line 805 b.

That is, the first signal feed line is any one of the at least two signal feed lines, the second signal feed line is another one of the at least two signal feed lines different from the first signal feed line, the first coupling device is any one of the at least two coupling devices, and the second coupling device is another one of the at least two coupling devices different from the first coupling device.

In one possible implementation, the first signal feed line 805a is used to input a signal of a first frequency band to the first coupling device 801a, and the second signal feed line 805b is used to input a signal of a second frequency band to the second coupling device 801 b. In fig. 8, radiating device 802 may be excited to produce an inverted-F resonant mode as a result of first coupling device 801a receiving a signal in a first frequency band fed by first signal feed 805a, and radiating device 802 may be excited to produce a target resonant mode as a result of second coupling device 801b receiving a signal in a second frequency band fed by second signal feed 805 b; wherein the target resonant mode is different from the inverted-F mode.

Corresponding to the above-mentioned first frequency band being the frequency band of 2.55GHz to 2.65GHz and the second frequency band being the first sub-frequency band (the frequency band of 3.3GHz to 3.36 GHz), then, in fig. 8, the radiation device can simultaneously generate the inverse F resonance mode of a quarter wavelength in the first direction and the half-wavelength resonance mode in the second direction.

In one possible implementation, the radiation device further includes a radiation slot, and the one coupling device is disposed across the radiation slot. Please refer to fig. 9, which illustrates a schematic structural diagram of another antenna module according to an exemplary embodiment of the present application. As shown in fig. 9, the antenna module includes: coupling device 901, radiating device 902, metallic ground plane 903, and signal feed line 904.

Fig. 8 can be referred to for the connection between the radiation device 902 and the metal ground plate 903 and the arrangement of the coupling device. In fig. 9, the number of the coupling devices 901 is 2 (also including the first coupling device 901a and the second coupling device 901b), and the number of the signal feeding lines 904 is 2 (also including the first signal feeding line 904a and the second signal feeding line 904b), wherein the first coupling device 901a is electrically connected to the first signal feeding line 904a, and the second coupling device 901b is electrically connected to the second signal feeding line 904 b. The radiation device 902 further includes a radiation gap 905 thereon, and the first coupling device 901a is disposed across the radiation gap 905. In this application, the end of the first coupling device 901a is located at one side of the radiation gap at the edge of the radiation device 902, where the end of the coupling device 901 refers to the portion of the coupling device directly below the radiation gap 905 in fig. 9, and correspondingly, the radiation gap at the edge of the radiation device 902 may be the portion of the radiation gap directly above the end of the corresponding first coupling device 901 a.

In one possible implementation, the first signal feed line 904a is used to input the signal of the second frequency band to the first coupling device 901a, and the second signal feed line 904b is used to input the signal of the first frequency band to the second coupling device 901 b. In fig. 9, since the first coupling device 901a receives a signal fed to the second frequency band by the first signal feed line 904a, the radiating device 902 may be excited to generate a resonant mode at one eighth wavelength along the radiating slot, and since the second coupling device 901b receives a signal fed to the first frequency band by the second signal feed line 904b, the radiating device 902 may be excited to generate an inverted-F resonant mode in the first direction. I.e. the frequency band corresponding to the above-mentioned first frequency band being 2.55GHz to 2.65GHz, and the second frequency band being a second sub-band (the frequency band of 4.89GHz to 5 GHz), then, in fig. 9, the radiation device can simultaneously generate an inverted F resonance mode of a quarter wavelength in the first direction and a resonance mode of an eighth wavelength along the radiation slot.

In a possible implementation manner, the first signal feed line 904a in fig. 9 may also be used to input the signal of the second sub-band to the first coupling device 901a, and the second signal feed line 904b may also be used to input the signal of the first sub-band to the second coupling device 901 b. In fig. 9, the radiating device 902 may be excited to produce a resonant mode at one-eighth wavelength along the radiating slot due to the first coupling device 901a receiving the signal fed into the second sub-band by the first signal feed line 904a, and the radiating device 902 may be excited to produce a resonant mode at one-half wavelength in the second direction due to the second coupling device 901b receiving the signal fed into the first sub-band by the second signal feed line 904 b.

Corresponding to the above-mentioned frequency band in which the first sub-band is 3.3 to 3.36GHz and the second sub-band is 4.89GHz to 5GHz, the radiation device can simultaneously generate a resonance mode along one-eighth wavelength of the radiation slot and a resonance mode of one-half wavelength in the second direction in fig. 9.

In a possible implementation manner, taking the shape of the radiation device in the antenna module provided by the present application as a rectangle for example, the length of the radiation device is one quarter of the wavelength of the electromagnetic wave in the 2.6GHz operating band, and the width of the radiation device is one half of the wavelength of the electromagnetic wave in the 3.3GHz operating band. And, the radiation device includes a radiation slit thereon.

Please refer to fig. 10, which illustrates a schematic structural diagram of an antenna module according to an exemplary embodiment of the present application. The antenna module provided by the embodiment of the application can be applied to the electronic device in the application scenario shown in fig. 1. As shown in fig. 10, the antenna module includes: a coupling device 1001, a radiation device 1002, a metal ground plate 1003 and a radiation slot 1004;

the connection mode of the radiation device 1002 and the metal ground plate 1003 and the arrangement mode of the coupling device may refer to the above embodiments, and the arrangement mode of the radiation slot 1004 may also refer to the radiation slot in fig. 9, which is not described herein again.

In this application, in order to realize that after the 2.55 to 2.65GHz working frequency band, the 3.3 to 3.36GHz working frequency band and the 4.89 to 5GHz working frequency band are input into the coupling device subsequently, the radiation device and the coupling device can generate a resonance frequency band with a desired wavelength through coupling, the length of the radiation device can be set to be a quarter of the wavelength of the electromagnetic wave in the 2.6GHz working frequency band, and the width of the radiation device can be set to be a half of the wavelength of the electromagnetic wave in the 3.3GHz working frequency band. The shape of the radiation device is not limited in the present application, and the shape of the radiation device may be other shapes than a rectangular shape, such as a regular polygon, a circle, and a semicircle.

In a possible implementation manner, the antenna module includes three coupling devices and three signal feeding lines, the three coupling devices are a first coupling device 1001a, a second coupling device 1001b, and a third coupling device 1001c, respectively, and the three signal feeding lines 1005 are a first signal feeding line 1005a, a second signal feeding line 1005b, and a third signal feeding line 1005c, respectively.

Wherein the first coupling device 1001a is connected to the first signal feed 1005a, the second coupling device 1001b is connected to the second signal feed 1005b, the third coupling device 1001c is connected to the third signal feed 1005c, and the third coupling device 1001c is disposed across the radiation slot 1004.

In fig. 10, for the third coupling device 1001c, the end of the third coupling device 1001c is located at one side of the radiation slot at the edge of the radiation device, where the end of the third coupling device 1001c refers to the portion of the coupling device directly below the radiation slot in fig. 10, and correspondingly, the radiation slot at the edge of the radiation device may be the portion of the radiation slot directly above the end of the corresponding third coupling device 1001 c.

Alternatively, in fig. 10, a third signal feed line 1005c electrically connected to the third coupling device 1001c may feed signals of different frequency bands to the third coupling device 1001c, and excite different modes of resonance on the radiation device 1002. That is, the third signal feeding line 1005c may be used to input a signal to the third coupling device 1001c, and when the third coupling device 1001c inputs a different signal to the third coupling device 1001c, the radiating device may generate resonances of different modes accordingly.

Optionally, the signal input to the third coupling device 1001c by the third signal feeder 1005c is a signal in the first frequency band, and the radiation device 1002 is configured to generate an inverted F resonant mode; that is, if the signal inputted to the third coupling device 1001c by the third signal feeding line 1005c is a signal of the first frequency band, the third coupling device 1001c and the radiation device 1002 are coupled to each other, so that the radiation device 1002 may generate the resonance of the inverted F mode of the quarter wavelength in the first direction. The first frequency band signal is a frequency band signal corresponding to an operating frequency band of 2.55 to 2.65 GHz.

Referring to fig. 11, a schematic diagram of a current for generating a quarter-wave resonant band in an exemplary embodiment of the present application with respect to a radiating device of fig. 10 is shown. As shown in fig. 11, a third coupling device 1001c, a radiating device 1002, is included. When a signal of the first frequency band is input to the third coupling device 1001c, the third coupling device 1001c and the radiation device 1002 are coupled to each other, and a current shown in fig. 11 is generated in the radiation device, thereby exciting a quarter-wavelength inverted F mode resonance in the first direction.

Alternatively, the signal input to the third coupling device 1001c by the third signal feed line 1005c is a signal of the first sub-band, and the third coupling device 1001c excites the radiation device by voltage bias to generate a resonance mode of one-half wavelength in the second direction. That is, the third coupling device 1001c is biased by the input signal in a third direction, which is a direction pointing to the end of the coupling device along the connection point of the coupling device with the signal feed line (as described above with reference to fig. 5). The radiating device 402 may excite a resonant mode of one-half wavelength in the second direction; that is, if the signal input to the third coupling device 1001c by the third signal feed line 1005c is a signal of the first sub-band, the radiation device 402 may be caused to generate a resonant mode of one-half wavelength in the second direction by the voltage bias of the third coupling device 1001 c. The second frequency band signal is a frequency band signal corresponding to an operating frequency band of 3.3 to 3.36 GHz.

Referring to fig. 12, a schematic current diagram of a radiation device of fig. 10 for generating a resonant frequency band of one-half wavelength according to an exemplary embodiment of the present application is shown. As shown in fig. 12, a third coupling device 1001c, a radiating device 1002, is included. When a signal of the first sub-band is input to the third coupling device 1001c, a current shown in fig. 12 is generated in the radiation device 1002, and a one-half wavelength resonance mode is excited. Wherein, the radiation device has current zero point on both sides in the length direction, and the middle current in the length direction is the largest.

Optionally, the signal input to the third coupling device 1001c by the third signal feed line 1005c is a signal of a second sub-band, and the radiation device 402 is configured to generate a resonance mode along one eighth wavelength of the radiation slot; that is, if the signal inputted to the third coupling device 1001c by the third signal feeding line 1005c is a signal of the second sub-band, the radiation device 402 may generate a resonance mode along one eighth wavelength of the radiation slot. And the signal of the second sub-frequency band is a frequency band signal corresponding to the working frequency band of 4.89 to 5 GHz.

Referring to fig. 13, a schematic diagram of a current for generating a resonant frequency band of one eighth wavelength for a radiation device of fig. 10 according to an exemplary embodiment of the present application is shown. As shown in fig. 13, a third coupling device 1001c, a radiating device 1002, is included. When a signal of the second sub-band is input to the third coupling device 1001c, the third coupling device 1001c and the radiation device 1002 are coupled to each other, and a current shown in fig. 13 is generated in the radiation device 1002, exciting a resonance mode along one eighth wavelength of the radiation gap.

It should be noted that, for the first coupling device 1001a and the second coupling device 1001b in fig. 10 and the first signal feeder 1005a and the second signal feeder 1005b connected to each other, because no radiation slot is included in the corresponding radiation device, the first signal feeder 1005a and the second signal feeder 1005b may transmit a signal in a first frequency band or a signal in a first frequency sub-band to the corresponding coupling device, so as to excite the radiation device to generate an inverted F resonance mode with a quarter wavelength in a first direction, or excite the radiation device to generate a resonance mode with a half wavelength in a second direction, which is not described herein again.

Optionally, the antenna module shown in fig. 10 further includes a matching circuit 1006, where the matching circuit 1006 is used to connect the coupling device with the signal feeder; the matching circuit 1006 is also used to achieve impedance matching between the coupling device and the signal feed line. Namely, the matching circuit is arranged on the signal feeder line and then connected with the coupling device, so that the impedance of the coupling device is more matched with the impedance of the signal feeder line, and the loss of signals transmitted into the coupling device by the signal feeder line is reduced. For fig. 10, there may be a corresponding matching circuit on each signal feed line and impedance matching between the coupling device on that line and the signal feed line is achieved.

In one possible implementation, for the three signal feeds of fig. 10 described above, the three signal feeds may provide different frequency band signals to the respective coupled coupling devices. That is, different signals can be input to the first coupling device, the second coupling device, and the third coupling device, respectively. That is, in the antenna module that this application provided, different coupling device can be inputed different signals simultaneously to couple with same radiating element, make same radiating element produce the resonance of different modes simultaneously, realize working under the mode of different resonance frequency channels.

In a possible implementation manner, the first signal feeder is configured to input a signal of a first frequency band (i.e., a frequency band signal corresponding to the above-mentioned operating frequency band of 2.55 to 2.65 GHz) to the first coupling device, the second signal feeder is configured to input a signal of a first frequency sub-band (i.e., a frequency band signal corresponding to the above-mentioned operating frequency band of 3.3 to 3.36 GHz) to the second coupling device, and the third signal feeder is configured to input a signal of a second frequency sub-band (i.e., a frequency band signal corresponding to the above-mentioned operating frequency band of 4.89 to 5 GHz) to the third coupling device; accordingly, the first coupling device is coupled to the radiation device 402, the second coupling device is coupled to the radiation device 402, the third coupling device is coupled to the radiation device 402, the radiation device 402 may have not only a quarter-wavelength inverted-F mode resonance in the first direction, which is generated in the radiation device due to the mutual coupling between the first coupling device and the radiation device, but also a half-wavelength resonant mode in the second direction, and also an eighth-wavelength resonant mode along the radiation gap, which is generated in the radiation device due to the mutual coupling between the third coupling device and the radiation device, so that the same antenna module operates in different frequency bands, and provides functions of providing the quarter-wavelength inverted-F resonant mode, the half-wavelength resonant mode, and the eighth-wavelength resonant mode.

Referring to fig. 14, a graph illustrating a variation of the reflection coefficient of the antenna module of fig. 4 according to an exemplary embodiment of the present application is shown. As shown in fig. 14, when the signal feed line including the antenna module inputs signals of different frequency bands to the first coupling device, the reflection coefficient curve 1401, the first sampling point 1402, the second sampling point 1403, the third sampling point 1404, the fourth sampling point 1405, the fifth sampling point 1406, and the sixth sampling point 1407 of the antenna module are shown. As can be seen from the first sampling point 1402 and the second sampling point 1403, when the signal feeder inputs the first frequency band signal into the first coupling device, the reflection coefficient of the antenna module is less than-2.9631 decibels (dB), as can be seen from the third sampling point 1404 and the fourth sampling point 1405, when the signal feeder inputs the second frequency band signal into the first coupling device, the reflection coefficient of the antenna module is less than-3.2845 decibels (dB), as can be seen from the fifth sampling point 1406 and the sixth sampling point 1407, when the signal feeder inputs the third frequency band signal into the first coupling device, the reflection coefficient of the antenna module is less than-2.9117 decibels (dB).

Referring to fig. 15, a graph illustrating the variation of the system efficiency and the radiation efficiency of an antenna module of the present application in relation to fig. 4 is shown. As shown in fig. 15, a system efficiency curve 1501 of the antenna module when signals of different frequency bands are input to the first coupling device by the signal feed line of the antenna module, and a radiation efficiency curve 1502 of the antenna module when signals of different frequency bands are input to the first coupling device by the signal feed line of the antenna module are included. The system efficiency curve 1501 includes a first sample point 1503, a second sample point 1504, a third sample point 1505, a fourth sample point 1506, a fifth sample point 1507 and a sixth sample point 1508. Wherein, the first sampling point 1503 and the second sampling point 1504 show that when the signal feed line inputs the first band signal into the first coupling device, the radiation efficiency of the antenna module is greater than-3.2496 decibels (dB), the third sampling point 1505 and the fourth sampling point 1506 show that when the signal feed line inputs the second band signal into the first coupling device, the reflection coefficient of the antenna module is greater than-3.5781 decibels (dB), and the fifth sampling point 1507 and the sixth sampling point 1508 show that when the signal feed line inputs the third band signal into the first coupling device, the reflection coefficient of the antenna module is greater than-3.0926 decibels (dB).

In addition, the antenna module provided by the application can be coupled with a plurality of different coupling devices simultaneously through one radiation device, different resonance frequency bands are generated, the function of providing different resonance frequency bands is realized in one antenna module simultaneously, the circuit design in the antenna is simplified, and the complexity of the circuit design in the antenna is reduced.

Referring to fig. 16, a schematic structural diagram of an electronic device according to an exemplary embodiment of the present application is shown. As shown in fig. 16, the electronic device 1600 includes a first antenna module 1601, a second antenna module 1602, a third antenna module 1603, and a fourth antenna module 1604, and a plurality of antenna modules may share the same metal ground plate 1605. The first antenna module 1601, the second antenna module 1602, the third antenna module 1603 and the fourth antenna module 1604 may all adopt the antenna modules provided in fig. 2, fig. 4, fig. 6, fig. 8, fig. 9 or fig. 10.

Optionally, when the electronic device uses one or two antenna modules to transmit data such as messages and videos, the electronic device may enable the power amplifier electrically connected to the antenna module to operate in a corresponding frequency band, and input a signal to at least one coupling device in the antenna module through a signal feeder in the antenna module, and a radiation device in the antenna module and the coupling device to which the signal is input are coupled with each other, so as to generate a resonant frequency band with a corresponding wavelength in the radiation device. When the electronic equipment needs to transmit multiple resonant frequency bands, the electronic equipment can also input multiple signals to each coupling device in any antenna module, so that each coupling device is coupled with the radiating device in the antenna module to generate multiple resonant frequency bands, and the effect of transmitting different data through one antenna module is achieved.

In a possible implementation manner, when the electronic device needs to use the first antenna module to send a signal of the inverted F mode resonant frequency band with the first wavelength to the outside, the electronic device may input the signal of the first frequency band, that is, a frequency band signal corresponding to the operating frequency band of 2.55 to 2.65GHz, to the first coupling device in the first antenna module, and the first coupling device and the radiating device in the first antenna module are coupled with each other, so that a quarter-wavelength signal of the inverted F mode resonant frequency band is generated in the radiating device, and is radiated.

Or, when the electronic device needs to send a signal of the resonant frequency band of the offset mode with the second wavelength to the outside by using the first antenna module, the electronic device may input a signal of the first sub-frequency band, that is, a frequency band signal corresponding to the working frequency band of 3.3 to 3.36GHz, to the first coupling device in the first antenna module, and the first coupling device and the radiating device in the first antenna module are coupled with each other to generate a signal of the resonant mode with a half wavelength in the radiating device, so as to radiate the signal.

Or, when the electronic device needs to send a signal of the resonant frequency band of the slot mode with the third wavelength to the outside by using the first antenna module, the electronic device may input a signal of the second sub-frequency band, that is, a frequency band signal corresponding to the working frequency band of 4.89GHz to 5GHz, to the first coupling device in the first antenna module, and the first coupling device and the radiation device in the first antenna module are coupled with each other, so as to generate a signal of the resonant mode with the eighth wavelength in the radiation device, thereby radiating the signal.

In a possible implementation manner, when the electronic device needs to transmit a quarter-wavelength signal of the inverted-F mode resonant frequency band and a half-wavelength signal of the resonant mode, the electronic device may input a first frequency band signal, i.e., a frequency band signal corresponding to the operating frequency band of 2.55 to 2.65GHz, to a first coupling device in a first antenna module, and input a first frequency band signal, i.e., a frequency band signal corresponding to the operating frequency band of 3.3 to 3.36GHz, to a second coupling device in the first antenna module, where the first coupling device is coupled to a radiator in the first antenna module to generate a quarter-wavelength signal of the inverted-F resonant mode in the radiator, and the second coupling device is coupled to a radiator in the first antenna module to generate a half-wavelength signal of the resonant mode in the radiator, thereby radiating both antenna signals. Similarly, the same working mode can be realized for any antenna module in the electronic equipment, so that the electronic equipment does not need to design redundant antennas, and the effect of realizing the radiation of different resonant frequency bands by a single antenna is achieved.

In one possible implementation, an electronic device includes a metal back case; the radiation device in the first antenna module is arranged on the metal rear shell, and the first antenna module is any one of the at least one antenna module. For example, in an electronic device, the metal back case is directly molded on an inner surface thereof by a process such as LDS (Laser Direct Structuring) or PDS (advanced Distribution System). Or, in the electronic device, the flexible circuit board is attached to the inner surface of the metal rear case.

It should be understood that reference herein to "and/or" describing an association of case objects means that there may be three relationships, e.g., a and/or B, may mean: a exists alone, A and B exist simultaneously, and B exists alone. The character "/" generally indicates that the former and latter associated objects are in an "or" relationship.

The above-mentioned serial numbers of the embodiments of the present application are merely for description and do not represent the merits of the embodiments.

The above description is only exemplary of the present application and should not be taken as limiting the present application, as any modification, equivalent replacement, or improvement made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. An antenna module, characterized in that, the antenna module includes:

a metal ground plate;

the radiation device is arranged opposite to the metal grounding plate and is electrically connected with the metal grounding plate, a radiation gap is formed in the radiation device, and the projection of the coupling device on the radiation device crosses the radiation gap;

the coupling device disposed between the radiating device and the metallic ground plate;

a center of the coupling device has a first offset distance in a first direction with respect to a center of the radiating device, a center of the coupling device has a second offset distance in a second direction with respect to the center of the radiating device, the second direction being perpendicular to the first direction;

the coupling device is configured to: exciting the radiating device to produce a quarter-wave inverted-F resonant mode in the first direction when a signal in a first frequency band is coupled to the radiating device via the coupling device; exciting the radiating device to produce a one-half wavelength resonant mode in the second direction when a signal in a first sub-band included in a second frequency band is coupled to the radiating device via the coupling device; and exciting the radiating device to generate a resonant mode at one eighth wavelength along the radiating gap when a signal of a second sub-band included in the second frequency band is coupled to the radiating device via the coupling device.

2. The antenna module of claim 1, wherein the radiation slot comprises a first slot section and a second slot section connected to each other, the first slot section is disposed along the first direction and has an opening formed on a side of the radiation device close to the coupling device, one end of the second slot section is communicated with an end of the first slot section far away from the opening, and the other end of the second slot section extends along a side perpendicular to the first direction.

3. The antenna module of claim 2, wherein a location at which the coupling device connects with the signal feed forms a feed point located on a side of the first slot segment facing away from the second slot segment.

4. The antenna module of claim 1, wherein the first side of the radiating element is electrically connected to the metal ground plane; the length of the first side is one fourth of the wavelength of the electromagnetic wave in the first frequency band;

the second side of the radiation device is perpendicular to the first side, and the length of the second side is one half of the wavelength of the electromagnetic wave of the first sub-band.

5. The antenna module of claim 4,

the first frequency band is a frequency band of 2.55GHz to 2.65 GHz; the first sub-band is a band of 3.3GHz to 3.36 GHz.

6. The antenna module of claim 1, wherein the length of the radiating slot is one eighth of the wavelength of the electromagnetic waves of the second sub-band.

7. The antenna module of claim 6, wherein the second sub-band is a 4.89GHz to 5GHz band.

8. The antenna module of claim 1, wherein the antenna module comprises at least two coupling devices and at least two signal feed lines; the at least two signal feed lines are for providing different signals to the at least two coupling devices.

9. The antenna module of claim 8, wherein the at least two signal feed lines comprise a first signal feed line and a second signal feed line, and the at least two coupling devices comprise a first coupling device and a second coupling device, the first signal feed line being configured to input the signal of the first frequency band to the first coupling device, and the second signal feed line being configured to input the signal of the second frequency band to the second coupling device.

10. The antenna module of claim 1, further comprising a matching circuit for connecting the coupling device to the signal feed line;

the matching circuit is used for realizing impedance matching between the coupling device and the signal feeder line.

11. An electronic device, characterized in that the electronic device comprises at least one antenna module, wherein the antenna module is according to any one of claims 1 to 10.

12. The electronic device of claim 11, wherein the electronic device comprises a metal rear housing;

the radiation device in the first antenna module is arranged on the metal rear shell, and the first antenna module is any one of the at least one antenna module.