Electronic device and antenna structure

Abstract

The present application provides an electronic device. The electronic device includes a low-frequency processing module, a high-frequency processing module, a coil, and at least one capacitor. The low-frequency processing module is electrically connected to two ends of the coil. The high-frequency processing module is electrically connected to two ends of the coil. Each of the at least one capacitor is connected in parallel to the coil. The present application provides an electronic device applicable to wireless communication fields, capable of wirelessly transmitting a cellular network signal transmitted by a network device from outdoors to indoors. Therefore, there is no need for a PoE network cable to pass through windows or walls, eliminating the need for specialized technical installation work and drilling. This can greatly improve the user experience.

Description

[Technical field]

[0001] This application claims priority to Chinese Patent Application No. 202010684519.1, entitled "ELECTRONIC DEVICE AND ANTENNA STRUCTURE", filed with the State Intellectual Property Office of the People's Republic of China on July 16, 2020, which is incorporated herein by reference in its entirety.

[0002] The present application relates to the field of wireless communications, and in particular to electronic devices and antenna structures. [Background technology]

[0003] Currently, customer premise equipment (CPE) located outdoors usually needs to transmit cellular network signals transmitted by base stations to indoors using power over ethernet (PoE) network cables. The PoE network cable needs to pass through windows or walls, so it is relatively difficult to arrange and route the cable. When the user's window gap is small or there is no borrowable hole arranged in the wall, professional technical installation work and hole drilling are required, and the installation cost is high. This application provides a wireless data transmission solution to replace the traditional solution in which the PoE network cable passes through the window or wall, thereby avoiding the hole drilling procedure required because the cable needs to pass through the window and wall, and effectively improving the user experience. Summary of the Invention [Means for solving the problem]

[0004] The embodiments of the present application provide an electronic device and an antenna structure to simultaneously perform low-frequency and high-frequency signal transmission on an electronic device using a built-in coil. By multiplexing the coil, in a CPE scenario, data transmission can be performed while the coil is transmitting power, thus realizing wireless data transmission and avoiding the drilling procedure required for cables to pass through windows and walls. In addition, multiplexing the coil can effectively reduce the number of antennas in the electronic device, thus contributing to the miniaturization of the electronic device.

[0005] According to a first aspect, an electronic device is provided, including a low-frequency processing module, a high-frequency processing module, a coil, and at least one capacitor. The low-frequency processing module is electrically connected to two ends of the coil. The high-frequency processing module is electrically connected to two ends of the coil. Each of the at least one capacitor is connected in parallel to the coil. It should be understood that as the number of capacitors connected in parallel to the coil increases, the voltage between the inner ring and the outer ring of the coil tends to be the same, and therefore the radiation performance of the coil becomes better.

[0006] According to the technical solution of this embodiment of the present application, by utilizing the characteristics of the capacitor being short-circuited at high frequency and short-circuited at low frequency, the antenna structure including the coil and at least one capacitor can operate at high frequency and low frequency simultaneously. In addition, the high frequency processing module and the low frequency processing module respectively process the signals used when the coil operates at two frequencies, so that the electronic device can process different electric signals simultaneously, which can effectively reduce the number of antennas in the electronic device, and contribute to the miniaturization of the electronic device.

[0007] Referring to the first aspect, in some implementations of the first aspect, the electronic device further includes a first low-pass filter, a second low-pass filter, a first high-pass filter, and a second high-pass filter. The first low-pass filter and the second low-pass filter are respectively disposed between the low-frequency processing module and two ends of the coil. The first low-pass filter is electrically connected to the low-frequency processing module and the coil. The second low-pass filter is electrically connected to the low-frequency processing module and the coil. The first high-pass filter and the second high-pass filter are respectively disposed between the high-frequency processing module and two ends of the coil. The first high-pass filter is electrically connected to the high-frequency processing module and the coil. The second high-pass filter is electrically connected to the high-frequency processing module and the coil.

[0008] According to the technical solution of this embodiment of the present application, the high-frequency channel and the low-frequency channel can be distinguished through the high-pass filter and the low-pass filter. When the antenna structure including a coil and at least one capacitor works in a low-frequency mode, the high-pass filter is disposed between the antenna structure and the high-frequency processing module, and the antenna structure is an open circuit at a low frequency, so that the crosstalk of the low-frequency electrical signal to the high-frequency processing module can be prevented. When the antenna structure works in a high-frequency mode, the low-pass filter is disposed between the antenna structure and the low-frequency processing module, and the antenna structure is an open circuit at a high frequency, so that the crosstalk of the high-frequency electrical signal to the low-frequency processing module can be prevented. By adding the high-pass filter and the low-pass filter to the electronic device, the problem of signal interference can be effectively alleviated.

[0009] With reference to the first aspect, in some implementations of the first aspect, the low frequency processing module is configured to process electrical signals for wireless charging.

[0010] Referring to the first aspect, in some implementations of the first aspect, the radio frequency processing module is configured to process an electrical signal for data transmission.

[0011] According to the technical solution of this embodiment of the present application, an electronic device can be used as a CPE. For example, the CPE may include a first electronic device located outdoors and a second electronic device located indoors, where the first electronic device and the second electronic device are any one of the above electronic devices. The second electronic device located indoors can supply power to the first electronic device through the coil, and at the same time, the first electronic device can also transmit data of the received cellular network signal to the second electronic device through the coil. The wireless transmission between the coil of the first electronic device and the coil of the second electronic device can prevent the PoE network cable from passing through the window or wall, and the need for professional technical installation work and drilling is eliminated, which can greatly improve the user experience.

[0012] Referring to the first aspect, in some implementations of the first aspect, the low frequency processing module is configured to process electrical signals of near field communication (NFC).

[0013] Referring to the first aspect, in some implementations of the first aspect, the radio frequency processing module is configured to process electrical signals in a wireless fidelity WiFi frequency band.

[0014] The technical solution according to this embodiment of the present application can also be applied to user equipment. When the indoor user equipment is within a certain range of the WiFi signal source, the user equipment can obtain the WiFi password through NFC, which is more convenient and contributes to improving the user experience.

[0015] With reference to the first aspect, in some implementations of the first aspect, a capacitance value of each of the at least one capacitor is between 0.5 pF and 5 pF.

[0016] According to the technical solution of this embodiment of the present application, the capacitance value of each of the at least one capacitor can be adjusted based on actual design or manufacturing needs. The capacitance values ​​of the capacitors may be different or the same.

[0017] With reference to the first aspect, in some implementations of the first aspect, a capacitance value of each of the at least one capacitor is 1 pF.

[0018] According to the technical solution of this embodiment of the present application, the capacitance value of each of the at least one capacitor can be adjusted based on actual design or manufacturing needs.

[0019] With reference to the first aspect, in some implementations of the first aspect, each of the at least one capacitor is a distributed capacitor or a lumped capacitor.

[0020] According to the technical solution of this embodiment of the present application, if the capacitor is a distributed capacitor, the capacitance value of the capacitor can be different according to the frequency radiated by the antenna structure, which can provide a better matching to the antenna structure, and if the capacitor is a lumped capacitor, the volume of the capacitor is smaller, which contributes to the miniaturization of the antenna structure.

[0021] Referring to the first aspect, in some implementations of the first aspect, the electronic device further includes a first antenna unit, and an operating frequency band of the first antenna unit covers at least one frequency band of the cellular network.

[0022] According to the technical solution of this embodiment of the present application, the first antenna unit may be configured to receive a cellular network signal transmitted by a network device, and transmit the signal to another electronic device using an antenna structure formed by a coil and at least one capacitor.

[0023] Referring to the first aspect, in some implementations of the first aspect, the electronic device further includes a second antenna unit, and an operating frequency band of the second antenna unit covers the WiFi frequency band.

[0024] According to the technical solution of this embodiment of the present application, the second antenna unit may be configured to convert an electrical signal received by the antenna structure formed by the coil and at least one capacitor and processed by the radio frequency processing module into a WiFi signal.

[0025] With reference to the first aspect, in some implementations of the first aspect, one end of each of the at least one capacitor is electrically connected to the coil at the outermost ring of the coil, and the other end is electrically connected to the coil at the innermost ring of the coil.

[0026] According to the technical solution of this embodiment of the present application, when a capacitor is connected in parallel between the innermost and outermost rings of a coil, when the capacitor is in a short-circuit state, conduction is realized between the outermost and innermost rings of the coil, so that when the coil is used as a communication antenna, the radiating area of ​​the coil is increased and the radiation performance of the coil is better.

[0027] Referring to the first embodiment, in some implementations of the first embodiment, the planar size of the coil is 80 mm×80 mm or less.

[0028] According to the technical solution of this embodiment of the present application, the size of the coil in the aforementioned electronic device can be adjusted based on the actual design or manufacturing needs.

[0029] According to a second aspect, there is provided an antenna structure including a coil and at least one capacitor, each of the at least one capacitor being connected in parallel with the coil.

[0030] Referring to the second aspect, in some implementations of the second aspect, the coil is a wireless charging coil or a low frequency communication coil.

[0031] Referring to the second aspect, in some implementations of the second aspect, the low frequency communication coil is a near field communication (NFC) coil.

[0032] With reference to the second aspect, in some implementations of the second aspect, the capacitance value of each of the at least one capacitor is between 0.5 pF and 5 pF.

[0033] With reference to the second aspect, in some implementations of the second aspect, the capacitance value of each of the at least one capacitor is 1 pF.

[0034] With reference to the second embodiment, in some implementations of the second embodiment, the planar size of the coil is 80 mm×80 mm or less. [Brief description of the drawings]

[0035] [Figure 1] FIG. 1 is a schematic diagram of the architecture of a mobile communication system applicable to an embodiment of the present application; [Diagram 2] FIG. 2 is a schematic diagram of an antenna structure according to an embodiment of the present application; [Diagram 3] FIG. 1 is a schematic diagram of a structure of an electronic device according to an embodiment of the present application. [Figure 4] FIG. 1 is a schematic diagram of an application scenario of an electronic device according to an embodiment of the present application. [Diagram 5] FIG. 13 is a schematic diagram of an S-parameter simulation when no capacitor is connected in parallel with the coil. [Figure 6] FIG. 13 is a schematic diagram of an S-parameter simulation when a capacitor is connected in parallel with a coil. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0036] The technical solutions of the present application are described below with reference to the accompanying drawings.

[0037] FIG. 1 is a schematic diagram of the architecture of a mobile communication system applicable to an embodiment of the present application.

[0038] As shown in Fig. 1, a mobile communication system 100 may include at least one network device 101, at least one CPE 102, and at least one user equipment (UE) 103. Fig. 1 is only a schematic diagram, and the communication system may further include other network devices, such as wireless relay devices and wireless backhaul devices, which are not shown in Fig. 1. The present embodiment of the present application does not limit the number and specific types of network devices and UEs included in the mobile communication system.

[0039] The UE 103 in this embodiment of the present application may be a mobile phone, a tablet computer, a notebook computer, a smart band, a smart watch, a smart helmet, or smart glasses, etc. The electronic device may alternatively be a cellular phone, a cordless phone, a session initiation protocol (SIP) phone, a wireless local loop (WLL) station, a personal digital assistant (PDA), a handheld device with wireless communication capability, a computing device, another processing device connected to a wireless modem, an in-vehicle device, an electronic device in a 5G network, or an electronic device in a future evolved public land mobile network (PLMN), etc. This is not limited in the embodiment of the present application. The technical solutions provided in the present application are applicable to a UE 103 that uses any one or more of the following communication technologies: a Bluetooth (BT) communication technology, a global positioning system (GPS) communication technology, a wireless fidelity (WiFi) communication technology, a global system for mobile communications (GSM) communication technology, a wideband code division multiple access (WCDMA) communication technology, a long term evolution (LTE) communication technology, a 5G communication technology, and another future communication technology.

[0040] The network device 101 in this embodiment of the present application may be a device configured to communicate with a terminal device, and the network device may be a network device (base transceiver station, BTS) of a GSM system or a code division multiple access (CDMA), or may be a network device (nodeB, NB) of a WCDMA system, or may be an evolved network device (evolutional nodeB, eNB or eNodeB) of an LTE system. Alternatively, the network device may be a relay station, an access point, an in-vehicle device, a wearable device, a network device (new generation nodeB, gNB or gNodeB) of a future 5G network or a network device of a future evolved PLMN network, and a later network device supporting a 3rd generation partnership project (3GPP) protocol version. This is not limited in this embodiment of the present application.

[0041] It should be understood that the CPE 102 can connect the user equipment 103 to the Internet by receiving cellular network signals transmitted by the network device 101 and transmitting the cellular network signals to the user equipment 103. For example, the CPE 102 can convert the 2G / 3G / 4G / 5G signals transmitted by the network device 101 to WiFi signals to connect the user equipment 103 to the Internet.

[0042] However, in the conventional technical solution, the CPE 102 is usually located outdoors and transmits signals to the indoor user equipment 103 through a PoE network cable. The PoE network cable needs to pass through a window or a wall, so it is relatively difficult to arrange and route the cable. If the user's window gap is small or there is no usable hole in the wall, professional technical installation work and drilling are required, and the installation cost is high.

[0043] The present application provides an electronic device that can be applied to the aforementioned scenario and can wirelessly transmit the cellular network signal sent by the network device from outdoors to indoors. Therefore, the PoE network cable does not need to pass through the window or wall, and the need for professional technical installation work and drilling is eliminated. This can greatly improve the user experience.

[0044] FIG. 2 is a schematic diagram of an antenna structure according to an embodiment of the present application, which may be applied to a CPE or UE in the scenario shown in FIG.

[0045] As shown in FIG. 2, the antenna structure 200 may include a coil 210 and at least one capacitor 220.

[0046] Capacitor 220 may be connected in parallel to coil 210. The parallel connection can be understood as a state in which one end of capacitor 220 is electrically connected to coil 210 at the outer ring of coil 210 and the other end of capacitor 220 is electrically connected to coil 210 at the inner ring of coil 210, that is, a state in which capacitor 220 is connected in parallel to coil 210.

[0047] Optionally, the outer ring of coil 210 may be the outermost coil layer of coil 210, or any one of several coil layers adjacent to the outermost coil layer. This can be selected based on actual design or simulation. It should be understood that the inner ring of coil 220 can be understood accordingly. In addition, the outer ring and the inner ring are relative concepts, and specifically, the outer ring only needs to be axially outside where the inner ring is located.

[0048] The coil 210 of this embodiment of the present application is obtained by adding at least one capacitor 220 arranged in parallel to a conventional design.

[0049] When the antenna structure 200 operates in the low-frequency mode, the capacitor 220 connected in parallel with the coil 210 is in an open-circuit state, and the parallel-connected capacitor 220 does not affect the normal operation of the coil 210. It can be understood that the low-frequency mode is generally less than 100 MHz. For example, the coil 210 operating in the low-frequency mode may be a wireless charging coil or a near field communication (NFC) coil. If the coil 210 is a wireless charging coil, the operating frequency of the antenna structure 200 in the low-frequency mode is several tens of kHz. If the coil 210 is an NFC coil, the operating frequency of the antenna structure 200 in the low-frequency mode is 13.6 MHz.

[0050] When the antenna structure 200 operates in high frequency mode, the capacitor 220 connected in parallel with the coil 210 is short-circuited, so that the conduction between the inner and outer rings of the coil 210 can be ensured. In this case, the voltage between the inner and outer rings of the coil 210 is balanced, and the whole coil 210 can be used as an entity and as a radiator operating in high frequency mode, and has good radiation characteristics. It can be understood that the high frequency mode is usually above 1 GHz. For example, the coil 210 operating in high frequency mode can operate in 2G / 3G / 4G / 5G related frequency bands, or can operate in 2.4 GHz or 5 GHz WiFi frequency bands.

[0051] It should be understood that as the number of capacitors 220 connected in parallel to the coil 210 increases, the voltage between the inner and outer rings of the coil 210 tends to be the same, and thus the radiation performance of the coil becomes better. The number of capacitors 220 connected in parallel to the coil 210 can be determined based on actual design or simulation.

[0052] Optionally, the first end 201 and the second end 202 of the coil 210 may be electrically connected to a front-end circuit of an electronic device to transmit an electrical signal. For example, if the coil 210 is a wireless charging coil, the first end 201 and the second end 202 may be electrically connected to a wireless charging module in the electronic device. Alternatively, if the coil 210 is a radio frequency communication antenna, the first end 201 may be electrically connected to a radio frequency module in the electronic device and the second end 202 may be electrically connected to a reference ground in the electronic device.

[0053] As an option, the capacitance value of the capacitor 220 may be between 0.5 pF and 5 pF.

[0054] Optionally, the capacitance value of the capacitor 220 may be 1 pF. It should be understood that the capacitance value of the capacitor 220 can be selected based on actual design or simulation, which is not limited in this application.

[0055] Optionally, the capacitor 220 may be a distributed capacitor or a lumped capacitor. If the capacitor 220 is a distributed capacitor, the capacitance value of the capacitor 220 may vary with the frequency radiated by the antenna structure, providing a better match to the antenna structure. If the capacitor 220 is a lumped capacitor, the volume of the capacitor 220 is smaller, which contributes to a smaller antenna structure.

[0056] As an option, the planar size of coil 210 is 80 mm×80 mm or less, which contributes to miniaturization of the antenna structure.

[0057] FIG. 3 is a schematic diagram of a structure of an electronic device according to an embodiment of the present application.

[0058] As shown in FIG. 3, the electronic device may include a low-frequency processing module 310, a high-frequency processing module 320, and an antenna structure 200, which may be the aforementioned antenna structure shown in FIG. 2.

[0059] The low-frequency processing module 310 may be electrically connected to the first end 201 and the second end 202 of the coil in the antenna structure 200 separately. The high-frequency processing module 320 may be electrically connected to the first end 201 and the second end 202 of the coil in the antenna structure 200 separately. The low-frequency processing module 310 may be configured to process electrical signals used when the parallel-connected capacitors in the antenna structure 200 are open-circuited, and in particular, may process electrical signals having frequencies less than 100 MHz. The high-frequency processing module 320 may be configured to process electrical signals used when the parallel-connected capacitors in the antenna structure 200 are short-circuited, and in particular, may process electrical signals having frequencies greater than 1 GHz.

[0060] Optionally, when the antenna structure 200 operates in a radio frequency mode, in the radio frequency processing module 320, the antenna structure 200 may be electrically connected to a radio frequency processing circuit at the first end 201 of the coil, and the second end 202 of the coil may be grounded, and a matching network may be added between the second end 202 and ground, which may suppress currents in other frequency bands and improve the overall performance of the antenna structure.

[0061] Optionally, the electronic device 300 may further include a first low pass filter 330 , a second low pass filter 340 , a first high pass filter 350 , and a second high pass filter 360 .

[0062] The first low-pass filter 330 may be disposed between the low-frequency processing module 310 and the first end 201 of the coil in the antenna structure 200, and is electrically connected to the low-frequency processing module 310 and the antenna structure 200. The second low-pass filter 340 may be disposed between the low-frequency processing module 310 and the second end 202 of the coil in the antenna structure 200, and is electrically connected to the low-frequency processing module 310 and the antenna structure 200. The first high-pass filter 350 may be disposed between the low-frequency processing module 310 and the first end 201 of the coil in the antenna structure 200, and is electrically connected to the low-frequency processing module 310 and the antenna structure 200. The second high-pass filter 360 may be disposed between the low-frequency processing module 310 and the second end 202 of the coil in the antenna structure 200, and is electrically connected to the low-frequency processing module 310 and the antenna structure 200.

[0063] It should be understood that the electronic device provided in this embodiment of the present application can distinguish between high-frequency channels and low-frequency channels through high-pass filters and low-pass filters. When the antenna structure 200 works in low-frequency mode, a high-pass filter is disposed between the antenna structure 200 and the high-frequency processing module 320, and the antenna structure is an open circuit at low frequencies, so as to prevent the crosstalk of low-frequency electrical signals to the high-frequency processing module 320. When the antenna structure 200 works in high-frequency mode, a low-pass filter is disposed between the antenna structure 200 and the low-frequency processing module 310, and the antenna structure is an open circuit at high frequencies, so as to prevent the crosstalk of high-frequency electrical signals to the low-frequency processing module 310. Adding high-pass filters and low-pass filters to the electronic device can effectively reduce the problem of signal interference.

[0064] FIG. 4 is a schematic diagram of an application scenario of an electronic device according to an embodiment of the present application.

[0065] It should be understood that the CPE shown in Figure 1 can be divided into an indoor unit (IDU) located indoors and an outdoor unit (ODU) located outdoors. Therefore, the electronic device provided in this embodiment of the present application can be an IDU or an ODU.

[0066] As shown in FIG. 4, a first electronic device 410 and a second electronic device 420 may be located on either side of an obstacle, respectively, and the first electronic device 410 and the second electronic device 420 are disposed opposite each other.

[0067] The obstacle may be a window or a wall. The first electronic device 410 and the second electronic device 420 are electronic devices shown in FIG. 3. The first electronic device 410 may include a first antenna structure 411, a first low-frequency module, and a first high-frequency module. The second electronic device 420 may include a second antenna structure 421, a second low-frequency module, and a second high-frequency module.

[0068] The first electronic device 410 may be an ODU and is located outdoors. The first antenna structure 411 may be a charging coil when operating in a low frequency mode, and may be a communication antenna when operating in a high frequency mode. Correspondingly, the first low frequency processing module in the first electronic device 410 may be configured to process electrical signals of wireless charging, and the first high frequency processing module may be configured to process electrical signals of data transmission.

[0069] The second electronic device 420 may be an IDU and is located indoors. The second antenna structure 421 may be a charging coil when operating in a low frequency mode, and may be a communication antenna when operating in a high frequency mode. Correspondingly, the second low frequency processing module in the second electronic device 320 may be configured to process the electrical signal of wireless charging, and the second high frequency processing module may be configured to process the electrical signal of data transmission.

[0070] The second antenna structure 421 of the second electronic device 420 can be used as a transmitting charging coil, and the first antenna structure 411 of the first electronic device 410 can be used as a receiving charging coil. The second electronic device 420 located indoors can use the second low-frequency processing module to process the wireless charging electric signal, use the second antenna structure 421 to transmit the wireless charging electric signal to the first antenna structure 411, and use the first low-frequency processing module to power the first electronic device 410. Therefore, the second electronic device 420 can be used to power the first electronic device 410 located outdoors, no additional power supply is needed, and the internal structure of the first electronic device 410 is simpler.

[0071] At the same time, the electronic device 410 located outdoors can use the first radio frequency processing module to process the electrical signal carrying data, and use the first antenna structure 411 to transmit the electrical signal carrying data to the second antenna structure 421. After processing by the second radio frequency processing module, the second electronic device 420 can obtain the transmitted data. It should be understood that the data transmission is bidirectional, and the second electronic device 420 also transmits data to the first electronic device 410 through a similar path.

[0072] Optionally, the distance L1 between the first antenna structure 411 and the second antenna structure 421 may be less than 10 cm, and may be 5 cm. The distance L1 between the first antenna structure 411 and the second antenna structure 421 may be the horizontal distance between the first antenna structure 411 and the second antenna structure 421, or may be the straight-line distance between the closest points of the first antenna structure 411 and the second antenna structure 421.

[0073] Optionally, the planar size of the first antenna structure 411 and the planar size of the second antenna structure 421 can be different, specifically, the diameter of the coil in the first antenna structure 311 and the diameter of the coil in the second antenna structure 321 can be different. It should be understood that the adjustment can be made based on the actual design or simulation results, which is not limited in this application.

[0074] Optionally, the first electronic device 410 may further include a first antenna unit 412, whose operating frequency band may cover at least one frequency band of a cellular network and may be used for data transmission to and from the network device. The cellular network may include 2G, 3G, 4G, 5G, or a future communication system.

[0075] Optionally, the second electronic device 420 may further include a second antenna unit 422, and the operating frequency band of the second antenna unit 422 may cover a WiFi frequency band and may be used for data transmission with indoor user equipment. The WiFi frequency band may be at least one of a 2.4 GHz or a 5G frequency band.

[0076] It should be understood that the cellular network signal can be converted into a WiFi signal through the first electronic device 410 and the second electronic device 420, and the cellular network signal transmitted by the network device can be wirelessly transmitted from outdoors to indoors. Therefore, the PoE network cable does not need to pass through the window or wall, and the need for professional technical installation work and drilling is eliminated. This is convenient and quick, and greatly improves the user experience.

[0077] Optionally, the second antenna unit 422 may instead be the antenna structure shown in Fig. 2. The second antenna unit 422 may be an NFC coil when operating in a low frequency mode, or an antenna operating in the WiFi frequency band when operating in a high frequency mode. If so, the corresponding low frequency processing module of the second antenna unit 422 may be configured to process NFC electrical signals, and the corresponding high frequency processing module may be configured to process WiFi frequency band electrical signals.

[0078] Therefore, the electronic device provided in this embodiment of the present application may instead be the user equipment shown in Figure 1, and the user equipment may include the antenna structure shown in Figure 2. In the antenna structure, the NFC coil and the WiFi antenna are combined to reduce the number of antennas in the user equipment and provide a larger placement space for antennas operating in other frequency bands. At the same time, when the indoor user equipment is within a certain range of the second antenna unit 322, the user equipment can obtain the WiFi password through NFC, which is more convenient and contributes to improving the user experience.

[0079] It should be understood that the coil provided in this embodiment of the present application can operate at high and low frequencies simultaneously by utilizing the design of parallel-connected capacitors and the property that the capacitors are shorted at high and low frequencies. The high-frequency processing module and the low-frequency processing module process signals of two frequencies respectively. Therefore, the coil provided in this embodiment of the present application can be another low-frequency communication coil instead, and is not limited to a wireless charging coil or an NFC coil.

[0080] Figures 5 and 6 are schematic diagrams of S-parameter simulations between the first and second antenna structures shown in Figure 4. Figure 5 is a schematic diagram of an S-parameter simulation when a capacitor is not connected in parallel to the coil. Figure 6 is a schematic diagram of an S-parameter simulation when a capacitor is connected in parallel to the coil.

[0081] As shown in Fig. 5 and Fig. 6, port 1 may be a connection port between a coil in a first antenna structure of a first electronic device and a radio frequency processing module, and port 2 may be a connection port between a coil in a second antenna structure of a second electronic device and a radio frequency processing module. After a capacitor is connected in parallel with the coil, a larger parameter S12 indicates more electrical signals transmitted from port 2 to port 1, indicating better signal transmission performance between the first antenna structure and the second antenna structure. At the same time, a smaller parameter S11 indicates less reflection at port 1, indicating more electrical signals transmitted to port 2. Similarly, a smaller parameter S22 indicates less reflection at port 2, indicating more electrical signals transmitted to port 1.

[0082] Optionally, with a limit of S12 greater than -5 dB, after the capacitor is added to the coil, in high frequency mode there may be a bandwidth of about 200 MHz to ensure good signal transmission characteristics between the first and second antenna structures.

[0083] Those skilled in the art may implement the described functions using different methods for each specific application, but such implementations should not be deemed to go beyond the scope of the present application.

[0084] It will be clearly understood by those skilled in the art that for the detailed working processes of the above-mentioned systems, devices and units, reference should be made to the corresponding processes of the above-mentioned method embodiments, and the details will not be described again here.

[0085] In some embodiments provided in the present application, it should be understood that the disclosed system, device, and method may be implemented in other ways. For example, the described device embodiment is only an example. For example, the division into units is only a logical division of functions, and may be other divisions in actual implementation. For example, multiple units or components may be combined or integrated into another system, or some functions may be ignored or not performed. Furthermore, the shown or discussed mutual couplings or direct couplings or communication connections may be implemented through some interfaces. Indirect couplings or communication connections between devices or units may be implemented in electronic form or other forms.

[0086] The above description is merely a specific implementation of the present application, and is not intended to limit the scope of protection of the present application. Any variations or replacements that are easily conceived by those skilled in the art within the technical scope disclosed in this application shall fall within the scope of protection of the present application. Therefore, the scope of protection of the present application shall be subject to the scope of protection of the claims. [Explanation of symbols]

[0087] 100 Mobile communication system 101 Network Devices 102 CPE 103 User Equipment (UE) 200 Antenna Structure 210 Coil 220 Capacitor 201 First end 202 Second End 300 Electronic Devices 310 Low Frequency Processing Module 320 High Frequency Processing Module 330 First Low-pass Filter 340 Second Low-pass Filter 350 1st High Pass Filter 360 Second High-Pass Filter 410 First Electronic Device 411 First Antenna Structure 412 First Antenna Unit 420 Second Electronic Device 421 Second Antenna Structure 422 Second Antenna Unit 1 port 2 Ports

Claims

1. An electronic device including a low frequency processing module, a high frequency processing module, a coil, and at least one capacitor, the low frequency processing module is electrically connected to two ends of the coil; the radio frequency processing module is electrically connected to the two ends of the coil; each of the at least one capacitor is connected in parallel with the coil; one end of each of the at least one capacitor is electrically connected to the coil at an outer ring of the coil and the other end of each of the at least one capacitor is electrically connected to the coil at an inner ring of the coil, the outer ring being axially outward relative to the inner ring; When the coil and the at least one capacitor operate in a low frequency mode, the at least one capacitor is in an open circuit state, and when the coil and the at least one capacitor operate in a high frequency mode, the at least one capacitor is in a short circuit state. Electronic devices.

2. The electronic device comprises: further comprising a first low pass filter, a second low pass filter, a first high pass filter, and a second high pass filter; the first low pass filter is disposed between the low frequency processing module and a first end of the coil, the second low pass filter is disposed between the low frequency processing module and a second end of the coil, the first low pass filter is electrically connected to the low frequency processing module and the coil, and the second low pass filter is electrically connected to the low frequency processing module and the coil; 2. The electronic device of claim 1, wherein the first high-pass filter is disposed between the radio frequency processing module and the first end of the coil, the second high-pass filter is disposed between the radio frequency processing module and the second end of the coil, the first high-pass filter is electrically connected to the radio frequency processing module and the coil, and the second high-pass filter is electrically connected to the radio frequency processing module and the coil.

3. The electronic device according to claim 1 or 2, wherein the low frequency processing module is configured to process electrical signals for wireless charging.

4. The electronic device of claim 3 , wherein the radio frequency processing module is configured to process electrical signals for data transmission.

5. 3. The electronic device according to claim 1, wherein the low frequency processing module is configured to process electrical signals of a near field communication standard (NFC).

6. The electronic device of claim 5 , wherein the radio frequency processing module is configured to process electrical signals in a Wireless Fidelity WiFi frequency band.

7. The electronic device according to any one of claims 1 to 6, wherein the capacitance value of each of the at least one capacitor is between 0.5 pF and 5 pF.

8. 8. The electronic device of claim 7, wherein the capacitance value of each of the at least one capacitor is 1 pF.

9. 9. The electronic device of claim 1, wherein each of the at least one capacitor is a distributed capacitor or a lumped capacitor.

10. The electronic device comprises:

10. The electronic device of claim 1, further comprising a first antenna unit, the operating frequency band of the first antenna unit covering at least one frequency band of a cellular network.

11. The electronic device comprises:

10. The electronic device of claim 1, further comprising a second antenna unit, the operating frequency band of the second antenna unit covering the WiFi frequency band.

12. The electronic device of claim 1 , wherein the outer ring is the outermost ring of the coil and the inner ring is the innermost ring of the coil.

13. The electronic device according to claim 1 , wherein the coil has a planar size of 80 mm×80 mm or less.

14. An antenna structure including a planar coil and at least one capacitor, each of the at least one capacitor is connected in parallel with the coil; one end of each of the at least one capacitor is electrically connected to the coil at an outer ring of the coil; the other end of each of the at least one capacitor is electrically connected to the coil at an inner ring of the coil; the outer ring is axially outwardly of the inner ring; the at least one capacitor is in an open circuit state when the antenna structure operates in a low frequency mode, and the at least one capacitor is in a short circuit state when the antenna structure operates in a high frequency mode. Antenna structure.

15. The antenna structure of claim 14, wherein the coil is a wireless charging coil or a low frequency communication coil.

16. 16. The antenna structure of claim 15, wherein the low frequency communication coil is a near field communication (NFC) coil.

17. The antenna structure according to claim 14, wherein the capacitance value of each of said at least one capacitor is between 0.5 pF and 5 pF.

18. 18. An antenna structure as claimed in claim 17, wherein the capacitance value of each of said at least one capacitor is 1 pF.

19. 19. The antenna structure according to claim 14, wherein the planar size of the coil is 80 mm x 80 mm or less.

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