Antenna and electronic device

Abstract

The application relates to an antenna and an electronic device, and is applied to the technical field of communication devices, wherein the antenna comprises: an antenna unit set, at least two antenna units are included in the antenna unit set, and the antenna units are arranged on the frame of the electronic device; wherein each antenna unit has one communication mode, the working frequency bands of the antenna units are different, and the communication modes of the antenna units in the antenna unit set comprise at least two kinds; in the case that a target antenna unit is in a working state, an antenna unit different from the target antenna unit in the communication mode is in a high-resistance state, and the target antenna unit is at least one antenna unit in the antenna unit set. The problems that in the prior art, the antenna is arranged outside, the antenna is easy to be damaged, or the antenna is arranged inside the electronic device, but the electronic device is large in size and is not beneficial to handheld electronic devices are solved.

Description

Technical Field

[0001] This application relates to the field of communication equipment technology, and more particularly to an antenna and electronic device. Background Technology

[0002] Low Earth Orbit (LEO) satellite communication systems utilize VHF signals as the information carrier, with near-Earth satellites or Starlink as communication relay stations to facilitate communication between ground devices and provide coverage for terrestrial communication equipment. An LEO satellite communication system consists of LEO satellites, a signal transmitter, and a receiver. The signal receiver can be a mobile phone, tablet, walkie-talkie, or other signal terminal receiving device. LEO satellite communication systems achieve navigation, emergency communication, or applications when ground-to-ground communication signals are poor through signal transmission between the transmitter and receiver.

[0003] As terminal electronic devices gradually develop towards thinner, more aesthetically pleasing, and more compact structures, low-orbit satellite communication typically uses VHF signals, which have low frequencies and large antenna electrical dimensions. In related technologies, antennas are often placed externally, making them prone to damage, or placed inside the electronic device, which results in a larger electronic device size, making it inconvenient to hold. Summary of the Invention

[0004] This application provides an antenna and an electronic device to solve the problems in the prior art where placing the antenna externally makes it easy to damage, or placing it inside the electronic device results in a large electronic device size, which is not conducive to handheld electronic devices.

[0005] In a first aspect, embodiments of this application provide an antenna applied to an electronic device, comprising:

[0006] An antenna element set, the antenna element set including at least two antenna elements, the antenna elements being disposed on the frame of the electronic device;

[0007] Each of the antenna elements has a communication method, and the operating frequency bands of each antenna element are different. The communication methods of the antenna elements in the antenna element set include at least two.

[0008] When the target antenna unit is in operation, antenna units that communicate with the target antenna unit in a different way are in a high-impedance state, and the target antenna unit is at least one antenna unit in the antenna unit set.

[0009] Optionally, each of the antenna elements includes an antenna stub and a feed stub connected to the antenna stub;

[0010] The feeding stub is used to feed power to the antenna stub when the antenna element is in operation;

[0011] The antenna elements with different communication methods and adjacent antenna segments have gaps between them.

[0012] Optionally, the antenna unit further includes a switching network circuit connected to the antenna stub; the switching network circuit is used to select the antenna unit in the working state.

[0013] Optionally, the switching network circuit includes a switch, in which the antenna element connected to the closed switch is in an operational state when the switch is closed and the antenna stub is powered.

[0014] Optionally, the antenna unit further includes an antenna matching network circuit connected to the feed stub, the antenna matching network circuit being used to adjust the impedance when the antenna unit is in operation.

[0015] Optionally, the communication method includes a first communication method and a second communication method;

[0016] When the first antenna stub is in operation, it reuses the second antenna stub through the gap;

[0017] Wherein, the first antenna stub is the antenna stub of the antenna element of the first communication method, and the second antenna stub is the antenna stub of the antenna element of the second communication method.

[0018] Optionally, the number of the second antenna stubs is two or more, and the two or more second antenna stubs are adjacent to each other.

[0019] Optionally, the antenna stub is integrated with the frame.

[0020] Optionally, the length of the antenna stub ranges from 0.1 to 0.25 wavelengths, the length of the feed stub ranges from 0.01 to 0.25 wavelengths, the length of the frame ranges from 0.25 to 20 wavelengths, and the width of the frame ranges from 0.01 to 10 wavelengths.

[0021] In a second aspect, embodiments of this application provide an electronic device, including: an electronic device body and an antenna as described in the first aspect, wherein the electronic device body includes a frame;

[0022] The antenna is mounted on the frame.

[0023] The antenna provided in this application embodiment includes an antenna element set, which includes at least two antenna elements disposed on the frame of the electronic device. Each antenna element has a communication mode, and the antenna elements operate at different frequency bands. The antenna elements in the antenna element set have at least two communication modes. When the target antenna element is in operation, the antenna element with a different communication mode is in a high-impedance state. The target antenna element is at least one antenna element in the antenna element set. Thus, by placing the antenna elements on the frame of the electronic device, the antenna can be housed within the electronic device using the frame, without occupying much space or exposing the antenna, thereby improving the antenna's lifespan. Furthermore, by using multiple antenna elements with multiple communication modes and different operating frequencies, the electronic device can meet various communication scenarios. Attached Figure Description

[0024] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0025] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 This is a schematic diagram of the antenna structure provided in one embodiment of this application;

[0027] Figure 2 This is a schematic diagram of the antenna structure provided in another embodiment of this application;

[0028] Figure 3 This is a schematic diagram of the antenna structure provided in yet another embodiment of this application;

[0029] Figure 4 The simulation results of the S-parameters of a cellular communication antenna provided in one embodiment of this application.

[0030] Figure 5 The simulation results of S-parameters for a low-orbit satellite communication band antenna provided in one embodiment of this application.

[0031] Figure label:

[0032] Antenna element set-1, antenna element-11, antenna stub-111, feed stub-112, switching network circuit-113, low-frequency antenna stub-21, low-frequency feed stub-22, first switch-23, mid-high frequency antenna stub-31, mid-high frequency feed stub-32, second switch-33, satellite antenna stub-41, satellite feed stub-42, frame-5, first frame-51, second frame-52, third frame-53, fourth frame-54, first grounding point-7, second grounding point-8. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0034] One embodiment of this application provides an antenna, such as Figure 1 As shown, the antenna includes: an antenna element set 1, which includes at least two antenna elements 11, and the antenna elements 11 are disposed on the frame 5 of the electronic device;

[0035] Each of the antenna elements 11 has a communication mode, and each of the antenna elements 11 operates in a different frequency band. The communication modes of the antenna elements 11 in the antenna element set 1 include at least two.

[0036] When the target antenna unit 11 is in the working state, the antenna unit 11 with a different communication mode than the target antenna unit 11 is in a high impedance state, and the target antenna unit 11 is at least one antenna unit 11 in the antenna unit 11 set 1.

[0037] In some embodiments, the antenna can be an antenna on an electronic device, through which the electronic device communicates. By placing the antenna element 11 on the frame 5 of the electronic device, the antenna can be housed within the electronic device using the frame 5, minimizing space occupation and preventing antenna exposure, thus improving antenna lifespan. Furthermore, by providing multiple antenna elements 11 with multiple communication modes and different operating frequencies, the electronic device can meet various communication scenarios.

[0038] In this context, "high impedance state" refers to a situation where a particular antenna element 11 has a higher impedance than the target antenna element 11. In this embodiment, an antenna element 11 that communicates with the target antenna element 11 in a different way may be in a high impedance state if it is in an open-circuit state or in a non-operating state.

[0039] The antenna in this application is integrated on the frame 5 of the electronic device, reusing the original antenna radiator without occupying new design space, and therefore will not affect other communication frequency bands.

[0040] Among them, the frame 5 of the electronic device can be a metal frame or a non-metal frame, or part of the frame can be made of metal and part of the frame can be made of non-metal.

[0041] Among them, see Figure 2 Each antenna element 11 includes an antenna stub 111 and a feed stub 112 connected to the antenna stub; the feed stub is used to feed the antenna stub when the antenna element 11 is in operation, and there is a gap between the antenna stubs of adjacent antenna elements 11 with different communication methods.

[0042] The antenna feed stubs can be constructed using various transmission line types, such as coaxial lines, microstrip lines, and striplines. Different feed ports excite different antenna stubs, thereby covering different frequency bands. The antenna stubs can be of any structure, including inverted-F antennas (IFAs), loop antennas, and slot antennas, used to cover cellular communication.

[0043] The antenna stub can be integrated with the frame 5, or the antenna stub can be located at any position on the frame 5. Integrating the antenna element 11 onto the frame 5 reuses the existing antenna radiator without occupying new design space, thus avoiding any impact on other communication frequency bands.

[0044] The form of antenna stubs is not limited to metal frame antennas; they can also be made into flexible printed circuits (FPCs) and other forms or processes of antennas.

[0045] By setting gaps between antenna segments of adjacent antenna elements 11 with different communication methods, the two adjacent antennas can be coupled through gaps, thereby reducing the overall length of the antenna and achieving antenna miniaturization.

[0046] In an optional embodiment, the antenna element 11 further includes a switching network circuit 113 connected to the antenna stub; the switching network circuit is used to select the antenna element 11 in the working state.

[0047] In some embodiments, the switching of the antenna operating mode is typically achieved by controlling the on / off state of the switching network circuit. The switching network circuit can be placed in the antenna stub and used to switch between antenna elements 11 with different communication modes.

[0048] For example, the antenna includes antenna element A and antenna element B. When antenna element A is working, its switching network circuit A is in the on state, and the switching network circuit B of antenna element B is in the off state. When switching the working mode, the switching network circuit A is switched to the off state, and the switching network circuit B is switched to the on state, thereby realizing the switching of the working mode.

[0049] In one embodiment, when the two antenna elements use the same communication method, there is no gap between their antenna branches, so that the dispersed radiators of the antenna can be connected by switching network circuits to become a longer radiator.

[0050] For example, the antenna includes antenna element C and antenna element D, both of which use the same communication method. When both are in operation, the antenna stubs of antenna element C and antenna element D work together, making the two radiators work together to become a longer radiator, thereby improving the communication effect.

[0051] In an optional embodiment, the switching network circuit includes a switch connected to the antenna element 11. When the switch is closed and the antenna stub is powered, the antenna element 11 connected to the closed switch is in an operational state.

[0052] The switch can be a virtual switch or a physical switch (such as a single-pole single-throw switch).

[0053] After the switch is closed, the feed stub supplies power to the antenna stub, thus putting the antenna element 11 into a conducting state. After the antenna stub is fed, it can communicate, thus putting the antenna stub into a working state.

[0054] It is understandable that when the aforementioned switch is closed, it can ground the antenna stub to enhance the antenna signal reception, transmission, and anti-static interference.

[0055] In an optional embodiment, the antenna unit 11 further includes an antenna matching network circuit connected to the feed stub, the antenna matching network circuit being used to adjust the impedance of the antenna unit 11 in the operating state.

[0056] The antenna matching circuit can achieve impedance control by using inductors and capacitors to exhibit different impedance characteristics at different frequencies.

[0057] In some embodiments, the antenna matching network circuit may be formed on the antenna feed stub by a certain type of resistive or capacitive component.

[0058] In one optional embodiment, the communication method includes a first communication method and a second communication method;

[0059] When the first antenna stub is in operation, it reuses the second antenna stub through the gap; wherein, the first antenna stub is the antenna stub of the antenna element 11 of the first communication mode, and the second antenna stub is the antenna stub of the antenna element 11 of the second communication mode.

[0060] In one alternative embodiment, the number of the second antenna stubs is two or more, and the two or more second antenna stubs are adjacent to each other.

[0061] The communication methods may include, but are not limited to, cellular communication and satellite communication. The antenna stubs for cellular communication may include low-frequency antenna stubs and mid-to-high-frequency antenna stubs.

[0062] For example, taking the first antenna stub as the antenna stub of the antenna unit 11 for satellite communication and the second antenna stub as the antenna stub of the antenna unit 11 for cellular communication as an example, when the first antenna stub is in the working state, the feeding stub of the second antenna stub will not feed it. Through the gap between the first antenna and the second antenna, a parasitic capacitance is formed between the two, thereby coupling the two and achieving the purpose of the first antenna stub reusing the second antenna stub.

[0063] Furthermore, when there are two or more second antenna stubs and two or more second antenna stubs are adjacent, since there is no gap between antenna stubs with the same communication method, a longer radiator can be formed between the second antenna stubs, thus enabling the first antenna stub to reuse multiple second antenna stubs.

[0064] In one optional embodiment, the length of the antenna stub ranges from 0.1 to 0.25 wavelengths, and the length of the feed stub ranges from 0.01 to 0.25 wavelengths. The length of the frame ranges from 0.25 to 20 wavelengths, and the width of the frame ranges from 0.01 to 10 wavelengths.

[0065] In one specific embodiment, see Figure 3The antenna unit set 1 includes three antenna units: a low-frequency antenna unit, a mid-to-high-frequency antenna unit, and a satellite antenna unit. The low-frequency antenna unit includes a low-frequency antenna stub 21, a low-frequency feed stub 22, and a first switch 23. The mid-to-high-frequency antenna unit includes a mid-to-high-frequency antenna stub 31, a mid-to-high-frequency feed stub 32, and a second switch 33. The satellite antenna unit includes a satellite antenna stub 41 and a satellite feed stub 42. The frame of the electronic device includes a first frame 51, a second frame 52, a third frame 53, and a fourth frame 54, as well as the low-frequency antenna stub 21, the mid-to-high-frequency antenna stub 31, and the satellite antenna stub 41. The backplate 6 is connected to the frame, forming the framework of the electronic device.

[0066] This includes a first grounding point 7 connected to the satellite antenna stub 41 and a second grounding point 8 connected to the first frame.

[0067] See Figure 3 The cellular band antenna in this application includes a low-frequency antenna stub 21, a mid-to-high frequency antenna stub 31, feed stubs for the two antennas, a matching network circuit, and an antenna switching network circuit. The low-frequency antenna stub 21 can cover the B5, B8, B20, and B28 frequency bands; the mid-to-high frequency antenna stub 31 can cover the B1, B2, B3, B34, B38, B39, B40, and B41 frequency bands, i.e., the 1700MHz-2700MHz band; and the satellite antenna stub 41 can cover the 249MHz-251.5MHz band, operating in the Very High Frequency (VHF) band.

[0068] Within the antenna's internal environment, the satellite communication antenna is composed of a low-frequency antenna stub 21, a mid-to-high frequency antenna stub 31, and a satellite antenna stub 41. There is a gap between the mid-to-high frequency antenna stub 31 and the satellite antenna stub 41; this gap coupling reduces the overall length of the antenna, achieving miniaturization and enabling radiation in the VHF band.

[0069] The second switch 33 operates with high impedance or is open during satellite communication; it operates with low impedance or is short-circuited during cellular communication. The first switch 23 operates with high impedance or is open during satellite communication; it operates with low impedance or is short-circuited during cellular communication. Impedance refers to the resistance to current flow in a circuit. When the first switch 23 and the second switch 33 are open or not grounded, the first switch 23 operates with low impedance or is short-circuited; when the first switch 23 and the second switch 33 are closed or grounded, the first switch 23 operates with high impedance or is open.

[0070] The high-impedance and low-impedance states of different communication modes can be constructed using the impedance characteristics of inductors and capacitors at different frequency bands. Alternatively, switching can be achieved using PIN diodes, complementary metal-oxide-semiconductor field-effect transistors (CMOS), and micro-electro-mechanical systems (MEMS) devices.

[0071] The low-frequency antenna stub 21, covering the B5, B8, B20, and B28 frequency bands, can be located on the long side of the frame, while the mid-to-high frequency antenna stub 31, covering the B1, B2, B3, B34, B38, B39, B40, and B41 frequency bands, can be located on the short side of the frame. The two feed stubs respectively excite the low-frequency antenna and the mid-to-high frequency antenna. It should be noted that... Figure 3 The first switch 23 cannot be regarded as the common grounding point of the two antenna stubs of cellular communication, but it can be regarded as the grounding point of the low-frequency antenna stub 21. It is far away from the mid-to-high frequency antenna stub 31, and the second switch 33 is already the grounding point of the mid-to-high frequency, so the first switch 23 is no longer needed as the grounding point of the mid-to-high frequency antenna in the cellular band.

[0072] There is a gap between the mid-to-high frequency antenna stub 31 and the satellite antenna stub 41. By using gap coupling, the length of the entire antenna is reduced, thus miniaturizing the antenna and enabling it to radiate in the VHF band.

[0073] In this system, the antenna units of cellular communication (including low-frequency antenna units and mid-to-high-frequency antenna units) and the antenna units of satellite communication are in a high-impedance isolation state. When the satellite communication antenna unit is in a high-impedance state relative to the antenna unit of cellular communication, the antenna operates in cellular communication mode, the satellite communication circuit does not operate, and it is used as a basic communication antenna. When the satellite communication mode is established, the satellite communication antenna starts to work, the circuit corresponding to cellular communication does not work, and it is used for satellite communication.

[0074] Among them, the low-frequency antenna stub 21, the mid-to-high frequency antenna stub 31 and the satellite antenna stub 41 each have their own excitation ports. The three excitation ports each have different antenna matching networks. The antenna matching circuit is designed in this way, namely the low-pass matching network, the high-pass matching network and the very high-pass matching network, to match or isolate the antennas in different operating states, so as to achieve the purpose of not affecting each other when switching antenna modes. The principle is that the inductor and capacitor exhibit different impedance characteristics at different frequencies.

[0075] When the satellite communication antenna is in operation, the cellular communication antenna is inactive. The matching network adjusts the antenna resonant frequency to operate in the satellite communication frequency band.

[0076] The antenna in this application can switch between different operating modes, such as switching from the Ultra High Frequency (UHF) band to other frequency bands, up to the VHF band, so that the radiators of other frequency band antennas can be used as satellite communication antennas.

[0077] It is understandable that the switching network circuit 113 and the antenna matching network circuit have a certain interaction relationship. The antenna matching network circuit corresponds to the low-frequency antenna unit, the mid-to-high-frequency antenna unit, and the satellite communication antenna unit. The main function of the switching network circuit 113 is to select the operating mode of different communication antenna units. The switching network circuit 113 may include, but is not limited to, the first switch 23 and the second switch 33.

[0078] It should be understood that when the first switch 23 and the second switch 33 are in a short-circuit or low-impedance state, the low-frequency feed stub 22 and the mid-to-high-frequency feed stub 32 are in operation, and the antenna operates in cellular communication. When the first switch 23 and the second switch 33 are in a short-circuit or low-impedance state, the low-frequency feed stub 22 is in operation, and the antenna operates in the low-frequency mode of cellular communication. When the second switch 33 is in a short-circuit or low-impedance state, the mid-to-high-frequency feed stub 32 is in operation, and the antenna operates in the mid-to-high-frequency mode of cellular communication. When the first switch 23 is open or in a high-impedance state, the low-frequency feed stub 22 and the mid-to-high-frequency feed stub 32 will be in standby mode. When the second switch 33 is also open or in a high-impedance state, the satellite feed stub 42 starts to operate and uses antenna stubs 21, 31, and 41 for communication. The cellular communication and satellite communication frequency bands of the antenna do not operate simultaneously; this is controlled by the states of the first switch 23 and the second switch 33. By switching the state of the network circuit, the application of the antenna has been expanded to low-frequency satellite communication without adding new radiators or occupying new design space.

[0079] In one embodiment, the antenna stub length is between 0.1 wavelength and 0.25 wavelengths, the feed stub length is between 0.01 wavelength and 0.25 wavelengths, the feed stub width is between 0.001 wavelength and 0.1 wavelength, the feed probe diameter in the feed stub is between 0.01 wavelength and 0.25 wavelengths, the frame length is between 0.25 wavelengths and 20 wavelengths, the frame width is between 0.01 wavelengths and 10 wavelengths, and the frame height is between 0.01 wavelengths and 10 wavelengths; the spacing between the frame and the backplate is between 0 and 0.25 wavelengths. Different frames may have different spacings with the backplate, and the same frame may also have different spacings with the backplate.

[0080] The distance between the frame and back panel of an electronic device affects the impedance of the antenna; adjusting the distance can broaden the bandwidth.

[0081] Figure 4 and Figure 5 The simulation results for the antenna are shown below. Figure 4 The simulation results of S-parameters for cellular communication antennas are shown. Figure 5 These are the S-parameter simulation results for a low-orbit satellite communication antenna.

[0082] like Figure 4 As shown, the S-parameter simulation results of the antenna operating in the cellular communication antenna show that |S11| is less than -6dB in the ranges of 700MHz-960MHz and 1700MHz-2700MHz, covering the frequency bands B1, B2, B3, B5, B8, B20, B28, B34, B38, B39, B40, and B41, and operating in the UHF band.

[0083] like Figure 5 As shown, the S-parameter simulation results of the antenna operating in the satellite communication band show that |S11| is less than -6dB within the range of 249MHz-251.5MHz, indicating that the antenna is operating in the VHF band.

[0084] Based on the same concept, this application provides an electronic device. For specific implementation of the electronic device, please refer to the description in the antenna embodiment section above. Repeated descriptions will not be repeated. The electronic device includes: an electronic device body and the antenna described in the above embodiment. The electronic device body includes a frame. The antenna is disposed on the frame of the electronic device.

[0085] The antenna of this application is applicable to electronic devices employing one or more of the following communication technologies, including but not limited to: low-Earth orbit satellite communication system technology, BeiDou navigation system communication technology, Bluetooth communication system technology, Global Positioning System communication technology, Wireless Fidelity communication system technology, Global System for Mobile Communications (GSMA) communication technology, 6G / 5G / 4G communication technology, etc. The electronic devices may include, but are not limited to, the following: mobile phones, tablets, computers, vehicle terminals, smart bicycles, smartwatches, smart glasses, smart refrigerators, wireless routers, televisions, vehicle radar, smart home appliances, and other electronic devices with communication functions.

[0086] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0087] The above description is merely a specific embodiment of the present invention, enabling those skilled in the art to understand or implement the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims

1. An antenna, characterized in that, Applied to electronic devices, including: An antenna element set, comprising at least two antenna elements, wherein the antenna elements are disposed on the frame of the electronic device and located inside the electronic device; Each of the antenna elements has a communication method, and the operating frequency bands of each antenna element are different. The communication methods of the antenna elements in the antenna element set include at least two. When the target antenna unit is in the working state, the antenna unit with a different communication method than the target antenna unit is in a high impedance state, and the target antenna unit is at least one antenna unit in the antenna unit set. Each of the antenna elements includes an antenna stub; The antenna elements of the antenna units with different communication methods and adjacent antenna segments have gaps between them; The communication method includes a first communication method and a second communication method; When the first antenna stub is in operation, it reuses the second antenna stub through the gap, and the second antenna stub is in a high-impedance state. Wherein, the first antenna stub is the antenna stub of the antenna element of the first communication method, and the second antenna stub is the antenna stub of the antenna element of the second communication method.

2. The antenna according to claim 1, characterized in that, Each of the antenna elements further includes a feed stub connected to the antenna stub; The feeding stub is used to feed power to the antenna stub when the antenna element is in operation.

3. The antenna according to claim 2, characterized in that, The antenna unit further includes a switching network circuit connected to the antenna stub; the switching network circuit is used to select the target antenna unit that is in operation.

4. The antenna according to claim 3, characterized in that, The switching network circuit includes a switch, in which the antenna element connected to the closed switch is in an operational state when the switch is closed and the antenna stub is powered.

5. The antenna according to claim 2, characterized in that, The antenna unit further includes an antenna matching network circuit connected to the feed stub, the antenna matching network circuit being used to adjust the impedance when the antenna unit is in operation.

6. The antenna according to claim 2, characterized in that, The number of second antenna stubs is two or more, and the two or more second antenna stubs are adjacent to each other.

7. The antenna according to claim 2, characterized in that, The antenna stub is integrated with the frame.

8. The antenna according to claim 2, characterized in that, The length of the antenna stub ranges from 0.1 to 0.25 wavelengths, the length of the feed stub ranges from 0.01 to 0.25 wavelengths, the length of the frame ranges from 0.25 to 20 wavelengths, and the width of the frame ranges from 0.01 to 10 wavelengths.

9. An electronic device, characterized in that, include: The electronic device body and the antenna as described in any one of claims 1 to 8, wherein the electronic device body includes a frame; The antenna is mounted on the frame.

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