Antenna module and terminal equipment

Abstract

The utility model provides an antenna module and terminal equipment. The antenna module comprises a first metal structure, at least one second metal structure, a feed end and a switch module. The feed end is electrically connected with the first metal structure. The switch module is arranged between the first metal structure and the at least one second metal structure and used for controlling connection and disconnection between the first metal structure and the at least one second metal structure. The terminal equipment comprises the antenna module. According to the invention, the tuning bandwidth range of the antenna module can be increased, and the application scenarios are increased.

Description

Technical Field

[0001] The present application relates to the field of wireless communication technologies, and in particular, to an antenna module and a terminal device. Background Art

[0002] Entering the 5G era, the number of antennas in 5G terminal devices is increasing, and at the same time, the appearance competition of terminal devices is becoming more intense. Each mainstream brand pursues a more extreme appearance, which increasingly conflicts with the spatial environment requirements of antenna design. How to improve the performance of the antenna system in the limited space of 5G terminal devices is becoming a greater challenge. The designs in related technologies have problems such as narrow antenna bandwidth and limited coverage frequency range. Summary of the Utility Model

[0003] The present application provides an improved antenna module and a terminal device.

[0004] The present application provides an antenna module including:

[0005] A first metal structure and at least one second metal structure;

[0006] A feeding end electrically connected to the first metal structure; and

[0007] A switching module disposed between the first metal structure and the at least one second metal structure for controlling the on / off between the first metal structure and the at least one second metal structure.

[0008] Optionally, the antenna module further includes a first matching circuit disposed between the feeding end and the first metal structure.

[0009] Optionally, the number of the second metal structures is set to be at least two.

[0010] Optionally, the antenna module further includes a second matching circuit disposed between the first metal structure and the switching module and between the at least one second metal structure and the switching module, and the matching circuits between each second metal structure and the switching module are the same or different.

[0011] Optionally, the switching module includes a first switch and at least one second switch. The first switch is electrically connected to the first metal structure through the second matching circuit, and the first switch is used to control the on / off between the second matching circuit and the first metal structure. The at least one second switch is electrically connected to each second metal structure through the second matching circuit, and the second switch is used to control the on / off between the second matching circuit and each second metal structure.

[0012] Optionally, when the first switch and a part of the second switches are closed synchronously, a part of the second matching circuits are connected in parallel and connected in series with the first matching circuit, so that a part of the second metal structures are connected in parallel and connected in series with the first metal structure to form a signal radiator of the antenna module.

[0013] Optionally, when the first switch and all of the second switches are closed synchronously, all of the second matching circuits are connected in parallel and connected in series with the first matching circuit, so that all of the second metal structures are connected in parallel and connected in series with the first metal structure to form a signal radiator of the antenna module.

[0014] Optionally, the number of the second metal structures connected in parallel is negatively correlated with the tuning bandwidth of the antenna module.

[0015] Optionally, the tuning bandwidth range of the antenna module is 1700 MHz to 2700 MHz.

[0016] Optionally, the antenna module further includes a first matching circuit, and the first matching circuit includes at least one Π-type LC circuit.

[0017] Optionally, the antenna module further includes a second matching circuit, and the second matching circuit includes at least one Π-type LC circuit.

[0018] Optionally, the switch module includes an active switch module.

[0019] This application further provides a terminal device, including: the antenna module according to any one of the above embodiments.

[0020] Optionally, the terminal device includes a controller electrically connected to the switch module of the antenna module, and the controller is configured to synchronously control the on / off of the first switch and at least one second switch of the switch module.

[0021] Optionally, the terminal device includes a camera and a metal decoration member for decorating the camera; wherein the metal decoration member includes the first metal structure and at least one second metal structure of the antenna module.

[0022] The antenna module and the terminal device provided by the embodiments of the present application. The antenna module is provided with a first metal structure, at least one second metal structure, a feeding end and a switching module. By electrically connecting the feeding end to the first metal structure and arranging the switching module between the first metal structure and at least one second metal structure, the on-off between the first metal structure and at least one second metal structure is controlled, so that the first metal structure is connected to different numbers of second metal structures to form different signal radiators of the antenna module, thereby increasing the tuning bandwidth range of the antenna module, covering between 1700 MHz and 2700 MHz, increasing the application scenarios, and using different numbers of metal structures as different signal radiators to reduce the number of antennas arranged in the terminal device, which is convenient for the layout inside the terminal device. Description of the Drawings

[0023] The drawings herein are incorporated into the specification and form a part of this specification, showing embodiments consistent with the present disclosure and used together with the specification to explain the principles of the present disclosure.

[0024] Figure 1 Shown is the circuit diagram of an embodiment of the antenna module of the present application.

[0025] Figure 2 Shown as Figure 1 The circuit diagram of the shown antenna module.

[0026] Figure 3 Shown as Figure 1 The circuit diagram of an embodiment of the shown antenna module.

[0027] Figure 4 Shown as Figure 1 The circuit diagram of another embodiment of the shown antenna module.

[0028] Figure 5 Shown as Figure 1 The circuit diagram of yet another embodiment of the shown antenna module.

[0029] Figure 6 Shown as Figure 2 The return loss diagram of the shown antenna module.

[0030] Figure 7 Shown as Figure 2 The antenna efficiency diagram of the shown antenna module. Detailed Embodiments

[0031] Exemplary embodiments will be described in detail herein, and examples thereof are shown in the accompanying drawings. When the following description refers to the accompanying drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. On the contrary, they are merely examples of devices and methods consistent with some aspects of the present application as detailed in the appended claims.

[0032] The terms used in the present application are for the purpose of describing specific embodiments only and are not intended to limit the present application. Unless otherwise defined, the technical terms or scientific terms used in the present application shall have the ordinary meanings understood by those of ordinary skill in the art to which the present application pertains. The terms "first", "second" and similar terms used in the specification and claims of the present application do not denote any order, quantity or importance, but are only used to distinguish different components. Similarly, the terms such as "a" or "an" do not denote a limitation of quantity, but mean that there is at least one. "Plurality" or "several" means at least two. Unless otherwise specified, terms such as "front", "rear", "lower" and / or "upper" are for convenience of description only and are not limited to one position or a spatial orientation. The terms such as "comprising" or "including" mean that the elements or items appearing before "comprising" or "including" cover the elements or items listed after "comprising" or "including" and their equivalents, and do not exclude other elements or items. The terms such as "connected" or "coupled" are not limited to physical or mechanical connections, and may include electrical connections, whether direct or indirect.

[0033] The singular forms "a", "the" and "said" used in the specification and claims of the present application are also intended to include the plural forms unless the context clearly dictates otherwise. It should also be understood that the term "and / or" as used herein refers to and encompasses any and all possible combinations of one or more of the associated listed items.

[0034] The present application provides an antenna module and a terminal device. The antenna module includes a first metal structure, at least one second metal structure, a feeding end and a switching module. The feeding end is electrically connected to the first metal structure. The switching module is disposed between the first metal structure and the at least one second metal structure and is configured to control the on / off between the first metal structure and the at least one second metal structure. The terminal device includes the above-mentioned antenna module.

[0035] The antenna module and the terminal device provided by the embodiments of the present application. The antenna module is provided with a first metal structure, at least one second metal structure, a feeding end and a switching module. By electrically connecting the feeding end to the first metal structure and arranging the switching module between the first metal structure and at least one second metal structure, the on-off between the first metal structure and at least one second metal structure is controlled, so that the first metal structure is connected to different numbers of second metal structures to form different signal radiators of the antenna module. In this way, the tuning bandwidth range of the antenna module is increased to cover the range between 1700 MHz and 2700 MHz, the application scenarios are increased, and different numbers of metal structures of the terminal device are used as different signal radiators, reducing the number of antennas arranged in the terminal device and facilitating the layout inside the terminal device.

[0036] The antenna module and the terminal device of the present application will be described in detail below with reference to the accompanying drawings. Without conflict, the features in the following embodiments and implementation manners can be combined with each other.

[0037] Figure 1 The following shows a circuit diagram of an embodiment of the antenna module 1 of the present application. As Figure 1 shown, the antenna module 1 is applied to a terminal device. The terminal device can be, for example, a portable electronic device such as a laptop computer, a mobile phone, or a tablet computer, and the terminal device can communicate using 5G technology. The terminal device includes a housing (not shown), a plurality of metal decorative parts provided on the housing, and a circuit board (not shown). The circuit board is provided with the antenna module 1. The metal decorative parts include a metal structure 10. The plurality of metal structures 10 can be, for example, local metal areas on the housing or metal parts protruding from the inner surface of the housing provided on the housing. The metal structure 10 can play a supporting role in cooperation with the housing in the housing, or can be a structure that decorates the housing or the terminal device. The metal structure 10 can originally be a part of the housing structure, or can be a newly added structure for forming an antenna structure. In this embodiment, the terminal device includes a camera and a metal decorative part. The metal decorative part is used to decorate the camera, and the metal decorative part can be an annular structure. In this embodiment, the specific metal material of the metal structure 10 is not limited, and it can be made of copper, iron, aluminum, etc., as long as it is ensured that the metal structure 10 has conductivity and can form a signal radiation part for signal reception or transmission.

[0038] In Figure 1In the illustrated embodiment, the antenna module 1 includes a metal structure 10, a feeding end 11, and a switching module 14. The metal structure 10 includes a first metal structure 101, at least one second metal structure 102, and the feeding end 11 is electrically connected to the first metal structure 101. The switching module 14 is disposed between the first metal structure 101 and at least one second metal structure 102 and is configured to control the connection and disconnection between the first metal structure 101 and at least one second metal structure 102. By using the switching module 14 in cooperation with the metal structure 10, when the switching module 24 is connected, the first metal structure 101 and at least one second metal structure 102 of the metal structure 10 are used as signal radiators to transmit or receive signals. When the switching module 24 is disconnected, the first metal structure 101 and at least one second metal structure 102 of the metal structure 10 can be used as decorative elements. With such an arrangement, by using the first metal structure 101 and at least one second metal structure 102 of the metal structure 10 to transmit or receive signals, the number of antennas provided in the terminal device can be reduced, facilitating the layout inside the terminal device. The antenna module 1 of the present embodiment is provided with a first metal structure 101, at least one second metal structure 102, a feeding end 11, and a switching module 14. By electrically connecting the feeding end 11 to the first metal structure 101 and disposing the switching module 14 between the first metal structure 101 and at least one second metal structure 102 to control the connection and disconnection between the first metal structure 101 and at least one second metal structure 102, the first metal structure 101 is connected to different numbers of second metal structures 102 to form different signal radiators of the antenna module 1, thereby increasing the tuning bandwidth range of the antenna module, covering between 1700 MHz and 2700 MHz, increasing the application scenarios, and using different numbers of metal structures of the terminal device as different signal radiators to reduce the number of antennas provided in the terminal device and facilitating the layout inside the terminal device.

[0039] In some embodiments, the number of the second metal structures 102 is set to at least two. The number of the second metal structures 102 is set to two or more. In the present embodiment, the number of the second metal structures 102 is set to three.

[0040] In some embodiments, the antenna module 1 further includes a first matching circuit 12 disposed between the feeding end 11 and the first metal structure 101. The first matching circuit 12 is configured to match and adjust the impedance between the antenna and the transmission line. By adjusting the parameters of the first matching circuit 12, the impedance of the antenna module 1 is matched with the impedance of the transmission line, reducing signal reflection and loss and improving signal transmission efficiency and performance.

[0041] In some embodiments, the antenna module 1 further includes a second matching circuit 13 disposed between the first metal structure 101 and the switch module 14 and between at least one second metal structure 102 and the switch module 14. The matching circuits between each second metal structure 102 and the switch module 14 are the same or different. By adjusting the parameters of the second matching circuit 13, the matching circuits between each second metal structure 102 and the switch module 14 are made the same or different, so that the impedance of the antenna module 1 matches the impedance of the transmission line, thereby increasing the tuning bandwidth range of the antenna module and covering between 1700 MHz and 2700 MHz, increasing the application scenarios.

[0042] In some embodiments, the switch module 14 includes a first switch 141 and at least one second switch 142. The first switch 141 is electrically connected to the first metal structure 101 through the second matching circuit 13. The first switch 141 is used to control the on / off between the second matching circuit 13 and the first metal structure 101. At least one second switch 142 is electrically connected to each second metal structure 102 through the second matching circuit 13. The second switch 142 is used to control the on / off between the second matching circuit 13 and each second metal structure 102. By providing the first switch 141 and the second switch 142, the on / off of the first metal structure 101 and the second metal structure 102 is controlled, so that the first metal structure 101 and different numbers of second metal structures 102 are connected in series to form different antenna radiators.

[0043] In Figure 1 In the illustrated embodiment, the first matching circuit 12 is electrically connected to the feeding end 11 and one of the metal structures 10 to form a first feeding branch 15. A plurality of second matching circuits 13 are correspondingly electrically connected to the remaining metal structures 10 to form a plurality of second feeding branches 16. Among them, the plurality of second feeding branches 16 are connected in parallel, and the plurality of second feeding branches 16 are respectively connected in series to the first feeding branch 15. The switch module 14 includes a first switch 141 and a plurality of second switches 142. The first switch 141 is electrically connected to the first matching circuit 12, and the plurality of second switches 142 are electrically connected to the plurality of second matching circuits 13. When the first switch 141 and at least one second switch 142 are closed, the first feeding branch 15 is connected in series with at least one second feeding branch 16 to form a signal radiator of the antenna module 1.

[0044] In this embodiment, the first matching circuit 12 is electrically connected to the feeding end 11 and the first metal structure 101 to form a first feeding branch 15. The first switch 141 is disposed on the first feeding branch 15 to control the on / off of the first feeding branch 15. A plurality of second matching circuits 13 are correspondingly electrically connected to a plurality of second metal structures 102 to form a plurality of second feeding branches 16. The second switch 142 is disposed on the second feeding branch 16, and the plurality of second switches 142 are arranged in one-to-one correspondence with the plurality of second feeding branches 16. The second switch 142 is used to control the on / off of the second feeding branch 16. By controlling the on / off of the first switch 141 and the plurality of second switches 142, one or more second feeding branches 16 are connected in parallel and connected in series with the first feeding branch 15, and different signal radiators are formed by the first feeding branch 15 and the second feeding branches 16 for feeding, so as to increase the tuning bandwidth range of the antenna module 1, make the tuning bandwidth cover 1700 MHz to 2700 MHz, increase the application scenarios, and use different numbers of metal structures 10 of the terminal device as different signal radiators, reduce the number of antennas arranged in the terminal device, and facilitate the layout inside the terminal device.

[0045] Figure 2 The circuit diagram of the antenna module 1 of the present application is shown as Figure 2 shown. The first metal structure 101 includes a first connection end 103 and a second connection end 104. The first connection end 103 is electrically connected to the first matching circuit 12, and the first switch 141 is electrically connected to the second connection end 104 of the first metal structure 101 through the second matching circuit 13. The first switch 141 is used to control the on / off of the first feeding branch 15 to control the on / off between the first metal structure 101 and the first matching circuit 12. In this embodiment, when the first switch 141 is turned on, the first feeding branch 15 is connected, and at this time, the first metal structure 101 is connected to the first matching circuit 12. With such a setting, controlling the on / off of the first feeding branch 15 through the first switch 141 is simple and fast, and the cost is low.

[0046] In Figure 2In the illustrated embodiment, each second metal structure 102 includes a third connection end 105, and the second switch 142 is electrically connected to the third connection end 105 of the second metal structure 102 through the second matching circuit 13. The second switch 142 is used to control the on / off of the second feeding branch 16, so as to control the on / off between the second metal structure 102 and the second matching circuit 13. In this embodiment, when the second switch 142 is turned on, the second feeding branch 16 is turned on, and at this time, the second metal structure 102 is connected to the second matching circuit 13. When at least one second switch 142 is turned on, at least one second feeding branch 16 is turned on, and at this time, at least one second metal structure 102 is connected to the second matching circuit 13. With such a setting, controlling the on / off of the second feeding branch 16 through the second switch 142 is simple and fast, and the cost is low.

[0047] In this embodiment, the first switch 141 and the second switch 142 can be electrically controlled switches. The terminal device further includes a controller 22, which is electrically connected to the switch module 14 of the antenna module 1. In this embodiment, the controller 22 is used to synchronously control the on / off of the first switch 141 and at least one second switch 142 of the switch module 14. Using the controller 22 of the terminal device to control the on / off of the first switch 141 and at least one second switch 142 does not require designing other control components, and the control method is simple and the cost is low.

[0048] In some embodiments, when the first switch 141 and some of the second switches 142 are closed synchronously, some of the second matching circuits 13 are connected in parallel and are connected in series with the first matching circuit 12, so that some of the second metal structures 102 are connected in parallel and are connected in series with the first metal structure 101, forming a signal radiator of the antenna module 1. In this embodiment, when the controller 22 controls the first switch 141 and some of the second switches 142 to be closed synchronously, some of the second matching circuits 13 are connected in parallel and are connected in series with the first matching circuit 12, so that some of the second metal structures 102 are connected in parallel and are connected in series with the first metal structure 101.

[0049] In this embodiment, the first matching circuit 12 includes at least one Π-type LC circuit. The second matching circuit 13 includes at least one Π-type LC circuit. The Π-type LC circuit of the first matching circuit 12 and the Π-type LC circuit of the second matching circuit 13 can be the same or different. Specifically, different numbers of Π-type LC circuits can be set according to actual needs, and the flexibility is strong.

[0050] The number of the metal structures 10 in this embodiment is set to four. Here, some of the second switches 142 can be one or more than one. The following takes four metal structures 10 as an example for illustration.

[0051] In some embodiments, when the first switch 141 and one of the second switches 142 are closed synchronously, the first matching circuit 12 is connected in series with one of the second matching circuits 13, so that one of the second metal structures 102 is connected in series with the first metal structure 101 to form a signal radiator of the antenna module 1.

[0052] Figure 3 is shown as Figure 1 a circuit diagram of an embodiment of the antenna module 1 shown. As Figure 3 shown, when the controller 22 outputs a control instruction to control the first switch 141 and the second switch 142a to be closed synchronously, the first matching circuit 12 is connected in series with the second matching circuit 13a, so that the second metal structure 102a is connected in parallel and in series with the first metal structure 101. In some other embodiments, the controller 22 outputs a control instruction to control the first switch 141 and the second switch 142b to be closed synchronously, the first matching circuit 12 is connected in series with the second matching circuit 13b, so that the second metal structure 102b is connected in parallel and in series with the first metal structure 101. In still some other embodiments, the controller 22 outputs a control instruction to control the first switch 141 and the second switch 142c to be closed synchronously, the first matching circuit 12 is connected in series with the second matching circuit 13c, so that the second metal structure 102c is connected in parallel and in series with the first metal structure 101. With such a setting, the first metal structure 101 is connected in parallel with one of the second metal structures 102 (for example, the second metal structure 102a, the second metal structure 102b, the second metal structure 102c), and one of the second metal structures 102 serves as a signal radiator, so that the tuning bandwidth of the antenna module 1 covers 2600 MHz.

[0053] In some embodiments, when the first switch 141 and two of the second switches 142 are closed synchronously, two of the second matching circuits 13 are connected in parallel and in series with the first matching circuit 12, so that two of the second metal structures 102 are connected in parallel and in series with the first metal structure 101 to form a signal radiator of the antenna module 1.

[0054] Figure 4 is shown as Figure 1 a circuit diagram of another embodiment of the antenna module 1 shown. As Figure 4As shown, when the controller 22 outputs a control instruction to control the first switch 141, the second switch 142a, and the second switch 142b to close synchronously, the second matching circuit 13a and the second matching circuit 13b are connected in parallel and connected in series with the first matching circuit 12, so that the second metal structure 102a and the second metal structure 102b are connected in parallel and connected in series with the first metal structure 101. In some other embodiments, when the controller 22 outputs a control instruction to control the first switch 141, the second switch 142b, and the second switch 142c to close synchronously, the second matching circuit 13b and the second matching circuit 13c are connected in parallel and connected in series with the first matching circuit 12, so that the second metal structure 102a and the second metal structure 102b are connected in parallel and connected in series with the first metal structure 101. In still other embodiments, when the first switch 141, the second switch 142a, and the second switch 142c are closed synchronously, the second matching circuit 13a and the second matching circuit 13c are connected in parallel and connected in series with the first matching circuit 12, so that the second metal structure 102a and the second metal structure 102c are connected in parallel and connected in series with the first metal structure 101. With such an arrangement, the first metal structure 101 is connected in parallel with two of the second metal structures 102 (for example, the second metal structure 102a and the second metal structure 102b, the second metal structure 102b and the second metal structure 102c, the second metal structure 102a and the second metal structure 102c), and the two second metal structures 102 serve as signal radiators, so that the tuning bandwidth of the antenna module 1 covers 2300 MHz.

[0055] In some embodiments, when the first switch 141 and all the second switches 142 are closed synchronously, all the second matching circuits 13 are connected in parallel and connected in series with the first matching circuit 12, so that all the second metal structures 102 are connected in parallel and connected in series with the first metal structure 101, forming a signal radiator of the antenna module 1.

[0056] Figure 5 As shown Figure 1 The circuit diagram of another embodiment of the antenna module 1 shown in the figure. As Figure 5As shown, when the controller 22 outputs control instructions to control the first switch 141, the second switches 142a, 142b, and 142c to close synchronously, the second matching circuits 13a, 13b, and 13c are connected in parallel and connected in series with the first matching circuit 12, so that the second metal structures 102a, 102b, and 102c are connected in parallel and connected in series with the first metal structure 101. With such a setting, the first metal structure 101 is connected in parallel with all the second metal structures 102 (for example, the second metal structures 102a, 102b, and 102c), and two of the second metal structures 102 are used as signal radiators, so that the tuning bandwidth of the antenna module 1 covers 2000 MHz.

[0057] In Figures 3 to 5 In the embodiment shown, the number of the second feeding branches 16 connected in parallel is negatively correlated with the tuning bandwidth of the antenna module 1. With such a setting, it can be designed according to actual requirements, and the number of the second feeding branches 16 connected in parallel has a wide adaptation range. In this embodiment, the tuning bandwidth range of the antenna module 1 is 1700 MHz to 2700 MHz. By controlling the on / off of the first switch 141 and multiple second switches 142, one or more second feeding branches 16 are connected in parallel and connected in series with the first feeding branch 15 to form different signal radiators, so as to increase the tuning bandwidth range of the antenna module 1 to cover between 1700 MHz and 2700 MHz, increase the application scenarios, and use different numbers of metal structures 10 of the terminal device as different signal radiators, reducing the number of antennas arranged in the terminal device and facilitating the layout inside the terminal device.

[0058] Figure 6 As shown in Figure 2 the return loss diagram of the antenna module 1 shown. Figure 7 As shown in Figure 2 the antenna efficiency diagram of the antenna module 1 shown. Figure 6 In Figure 6 the abscissa represents the frequency and the ordinate represents the return loss value. As Figure 7 shown, by switching through the switch module 14 to achieve different combined states, the tuning bandwidth range of the antenna module 1 covers 1700 MHz to 2700 MHz. Figure 7 In

[0059] Looking back at Figure 2In the illustrated embodiment, the switch module 14 includes an active switch module 14. The terminal device further includes a DC power supply 23. The switch module 14 is connected to the DC power supply 23, and the DC power supply 23 is used to supply power to the switch module 14 to ensure the stable operation of the switch module, which is stable and reliable.

[0060] The foregoing are only the preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present application shall be included within the scope of protection of the present application.

Claims

1. An antenna module, characterized in that: include: a first metal structure and at least one second metal structure; A feeding end, electrically connected to the first metal structure; and The switch module is arranged between the first metal structure and the at least one second metal structure, and is used to control the connection and disconnection between the first metal structure and the at least one second metal structure.

2. The antenna module according to claim 1, characterized in that: The antenna module also includes a first matching circuit, which is arranged between the feeding end and the first metal structure.

3. The antenna module according to claim 2, characterized in that: The number of the second metal structures is set to be at least two.

4. The antenna module according to claim 3, characterized in that: The antenna module also includes a second matching circuit, which is arranged between the first metal structure and the switch module and between at least one of the second metal structures and the switch module. The matching circuits between each of the second metal structures and the switch modules are the same or different.

5. The antenna module according to claim 4, characterized in that: The switch module includes a first switch and at least one second switch, the first switch is electrically connected to the first metal structure through the second matching circuit, the first switch is used to control the connection between the second matching circuit and the first metal structure, the at least one second switch is electrically connected to each of the second metal structures through the second matching circuit, and the second switch is used to control the connection between the second matching circuit and each of the second metal structures.

6. The antenna module according to claim 5, characterized in that: When the first switch and part of the second switch are closed synchronously, part of the second matching circuit is connected in parallel and in series with the first matching circuit, so that part of the second metal structure is connected in parallel and in series with the first metal structure to form a signal radiator of the antenna module.

7. The antenna module according to claim 5, characterized in that: When the first switch and all the second switches are closed synchronously, all the second matching circuits are connected in parallel and in series with the first matching circuits, so that all the second metal structures are connected in parallel and in series with the first metal structure to form the signal radiator of the antenna module.

8. The antenna module according to claim 1, characterized in that: The number of the second metal structures connected in parallel is negatively correlated with the tuning bandwidth of the antenna module; and / or The tuning bandwidth range of the antenna module is 1700MHz to 2700MHz; and / or The antenna module further includes a first matching circuit, wherein the first matching circuit includes at least one Π-type LC circuit; and / or The antenna module further includes a second matching circuit, wherein the second matching circuit includes at least one Π-type LC circuit; and / or The switch module includes an active switch module.

9. A terminal device, characterized in that: include: The antenna module according to any one of claims 1 to 8.

10. The terminal device according to claim 9, characterized in that: The terminal device includes a controller electrically connected to the switch module of the antenna module, and the controller is used to synchronously control the on and off of the first switch and at least one second switch of the switch module; and / or The terminal device comprises a camera and a metal decoration, wherein the metal decoration is used to decorate the camera; wherein the metal decoration comprises a first metal structure and at least one second metal structure of the antenna module.

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