Antenna system and electronic equipment

Abstract

The invention provides an antenna system and electronic equipment, the antenna system comprises a first antenna, a second antenna and a third antenna, and the third antenna is located between the first antenna and the second antenna. A first radio frequency circuit, a second radio frequency circuit and a third radio frequency circuit, the first radio frequency circuit is connected with the first antenna, and the second radio frequency circuit is connected with the second antenna. And a switching device and a load circuit, wherein the third antenna is connected with the switching device. And the switching device is used for connecting the third antenna with the third radio frequency circuit or the load circuit. The switching device is used for connecting the third antenna and the load circuit or connecting the third antenna and the third radio frequency circuit. According to the antenna system, on one hand, the transmitting power of signals can be increased, on the other hand, the receiving power of the signals can be increased, the antenna system can detect and fully utilize the aperture of the antenna, and the antenna aperture utilization rate is improved.

Description

Technical Field

[0001] The present application relates to the field of wireless communications, and in particular to an antenna system and an electronic device. Background Art

[0002] Duplex communication refers to a working mode that allows two-way information transmission between two communication devices. Therefore, duplex communication has the characteristics of high communication efficiency. For example, in full-duplex communication, both parties can send and receive information at the same time, that is, both parties can act as information senders and receivers at the same time. For example, during a voice call, both parties can speak and listen to each other's response at the same time, which is a full-duplex communication.

[0003] Due to the excellent performance of duplex communication, duplex communication is widely used, for example, in scenarios such as voice calls and video calls. In addition, duplex communication is also one of the key features of the sixth generation mobile communications (6G).

[0004] A duplex antenna is an antenna that allows for both signal reception and transmission, and is an important unit in duplex communication. An isolation device is usually installed inside the duplex antenna to ensure the normal operation of the duplex antenna transceiver unit. However, the isolation device takes up some space and loses the aperture efficiency of the antenna. Summary of the invention

[0005] The embodiments of the present application provide an antenna system and an electronic device, so that in a scenario with poor coverage, antenna units can be directly reused through switch switching, thereby improving the aperture utilization of the antenna.

[0006] In the present application, an antenna (e.g., a first antenna, a second antenna, or a third antenna) may also be referred to as a radiator or a radiating unit, etc. An antenna is a device for receiving / transmitting electromagnetic waves. An antenna may include one antenna or multiple antennas (e.g., an antenna array). For example, the first antenna may be one antenna, i.e., one physical antenna, or an antenna array, i.e., including multiple physical antennas.

[0007] In a first aspect, an embodiment of the present application provides an antenna system, the antenna system comprising:

[0008] a first antenna, a second antenna, and a third antenna, wherein the third antenna is located between the first antenna and the second antenna;

[0009] a first radio frequency circuit, a second radio frequency circuit and a third radio frequency circuit, wherein the first radio frequency circuit is connected to the first antenna, and the second radio frequency circuit is connected to the second antenna;

[0010] A switching device and a load circuit, the third antenna is connected to the switching device; the switching device is used to connect the third antenna to the third radio frequency circuit or the load circuit; the switching device is used to connect the third antenna to the load circuit, or to connect the third antenna to the third radio frequency circuit.

[0011] In an embodiment of the present application, an antenna system is provided, including: a first antenna, a second antenna, a third antenna, a first radio frequency circuit, a second radio frequency circuit, a third radio frequency circuit, a switch device and a load circuit. Among them, the first antenna is connected to the first radio frequency circuit, the second antenna is connected to the second radio frequency circuit, and the third antenna can be connected to the third radio frequency circuit or the load circuit through a switch device. In the case where the third antenna is connected to the load circuit through a switch device, the third antenna can receive signals from other antennas (for example, the third antenna can receive signals from the first antenna), and the signal may produce a phase or amplitude change after passing through the load, and is transmitted through the third antenna. Equivalently, the signal transmitted by the third antenna can be a signal after the phase and amplitude of the signal transmitted by the first antenna are adjusted. Therefore, after the signals transmitted by the first antenna and the third antenna are superimposed, the signal transmitted by the first antenna may be enhanced / weakened. If the signal transmitted by the third antenna can weaken the signal transmitted by the first antenna, the third antenna connected to the load circuit can shield the signal transmitted by the first antenna. In the case where the third antenna is connected to the third radio frequency circuit through a switch device, the third antenna can be used to transmit a signal to a terminal device or receive a signal from a terminal device. The third antenna is used to receive / transmit signals. On the one hand, it can increase the transmission power of the signal, and on the other hand, it can also increase the receiving power of the signal, so that the antenna system can detect and fully utilize the antenna aperture, thereby achieving the effect of improving the utilization rate of the antenna aperture.

[0012] In a possible implementation manner of the first aspect, the load circuit includes a lumped parameter circuit and / or a distributed parameter circuit.

[0013] In the implementation manner of the present application, the load circuit includes a lumped parameter circuit and / or a distributed parameter circuit, which can realize flexible design of the load circuit so that the signal passing through the load circuit produces a preset phase and amplitude change. When the third antenna is connected to the load circuit through a switching device, the third antenna receives a signal from other antennas (taking the first antenna as an example), and the signal of the first antenna will produce a phase and amplitude change, or a preset phase and amplitude change after passing through the load circuit. The third antenna transmits a signal with a phase and amplitude change, which can be superimposed with the signal of the first antenna, thereby achieving the effect of enhancing / weakening the signal transmitted by the first antenna. It can be understood that in an antenna system, the signal transmitted by the first antenna can be received by the second antenna and the third antenna. However, the signal of the first antenna is directly received by the second antenna, which may interfere with the signal received by the second antenna from the terminal device. The third antenna is connected to the load circuit so that the third antenna transmits a signal with a phase and amplitude change, and the signal can weaken the signal of the first antenna, so that the signal received by the second antenna from the first antenna is weakened, thereby reducing interference from the first antenna.

[0014] In another possible implementation of the first aspect, the first radio frequency circuit includes a radio frequency transmitting circuit, and the second radio frequency circuit includes a radio frequency receiving circuit.

[0015] In the implementation manner of the present application, the first radio frequency circuit includes a radio frequency transmitting circuit, and the second radio frequency circuit includes a radio frequency receiving circuit. The first antenna is connected to the first radio frequency circuit, and the second antenna is connected to the second radio frequency circuit. In other words, the first antenna can be used to transmit signals, and the second antenna can be used to receive signals.

[0016] In yet another possible implementation of the first aspect, the first radio frequency circuit further includes a radio frequency receiving circuit, and / or the second radio frequency circuit further includes a radio frequency transmitting circuit.

[0017] In the implementation manner of the present application, the first RF circuit further includes a RF receiving circuit, and / or the second RF circuit further includes a RF transmitting circuit, which is equivalent to that the first antenna can be used not only for transmitting signals but also for receiving signals, and the second antenna can be used not only for receiving signals but also for transmitting signals.

[0018] In yet another possible implementation of the first aspect, the third radio frequency circuit includes a radio frequency transmitting circuit and / or a radio frequency receiving circuit.

[0019] In the implementation manner of the present application, the third radio frequency circuit includes a radio frequency transmitting circuit and / or a radio frequency receiving circuit. When the third antenna is connected to the third radio frequency circuit through a switch device, the third antenna can be used to transmit signals and / or receive signals. When the first antenna, the second antenna, and the third antenna can all be used to transmit signals and receive signals, the antenna system can also be regarded as an all-aerial antenna, that is, all antennas in the antenna system can be used to transmit signals or receive signals.

[0020] In another possible implementation of the first aspect, when the switching device connects the third antenna to the load circuit; the first antenna is used to transmit a first signal, and the first signal and the second signal received by the second antenna have different amplitudes and / or phases.

[0021] In the implementation mode of the present application, the third antenna is connected to the load circuit through a switch device, the first antenna transmits a first signal, and the second antenna receives the first signal and the second signal, wherein the first signal and the second signal have different amplitudes and / or phases. Since the difference between the first signal and the second signal is that the first signal and the second signal have different amplitudes and / or phases, the first signal and the second signal received by the second antenna may cancel each other, thereby reducing the interference of the signal from the first antenna received by the second antenna.

[0022] In another possible implementation manner of the first aspect, the third antenna is used to receive the first signal and transmit the second signal;

[0023] The second signal is the first signal processed by the load circuit.

[0024] In the implementation manner of the present application, the third antenna is used to receive the first signal and transmit the second signal, and the second signal is a signal processed by the load circuit, so that when the third antenna is connected to the load circuit, it can be used to reduce the interference of the first signal on the signal received by the second antenna, thereby playing a role in signal isolation.

[0025] In another possible implementation of the first aspect, when the switch device connects the third antenna to the third RF circuit; when the third RF circuit is a RF receiving circuit, the first antenna transmits signals, and the second antenna and the third antenna receive signals.

[0026] In the implementation manner of the present application, the third antenna is connected to the third RF circuit through a switching device, and the third RF circuit is a RF receiving circuit, so that the third antenna is used to receive signals, which can increase the ability of the antenna system to receive signals and improve the performance of the antenna system in receiving weak signals.

[0027] In another possible implementation of the first aspect, when the switch device connects the third antenna to the third RF circuit; when the third RF circuit is a RF transmitting circuit, the first antenna and the third antenna transmit signals, and the second antenna receives signals.

[0028] In the implementation manner of the present application, the third antenna is connected to the third RF circuit through a switching device, and the third RF circuit is an RF transmitting circuit, so that the third antenna is used to transmit signals, which can increase the ability of the antenna system to transmit signals and improve the power of the antenna system to transmit signals and the coverage range of the signals.

[0029] In yet another possible implementation of the first aspect, the antenna system further includes a control unit; the control unit is used to control the switch device.

[0030] In an embodiment of the present application, the antenna system further includes a control unit, which is used to control the switch device so that the third antenna is connected to the third radio frequency unit, or the third antenna is connected to the load circuit. Thus, the antenna system can adapt to more application scenarios. For example, the connection between the third antenna and the load circuit can be applied to scenarios with good signal coverage, which can provide better isolation between the first antenna and the second antenna, reduce the interference of the first antenna signal on the second antenna, and meet the requirements of duplex communication. For another example, the connection between the third antenna and the third radio frequency circuit can be applied to scenarios with poor signal coverage, which can allow the third antenna to be used to transmit / receive signals, thereby improving the aperture utilization of the antenna system.

[0031] In a second aspect, an electronic device is provided, comprising: an antenna system as described in any one of the first aspect.

[0032] Optionally, the electronic device may be a base station, for example, a public mobile communication base station, including: a 2G base station, a 3G base station, a 4G base station or a 5G base station, etc.

[0033] Optionally, the electronic device can also be a future 6G base station.

[0034] Optionally, the electronic device may be a smart phone, a smart wearable device, or a tablet computer.

[0035] The beneficial effects of the embodiments of the present application can refer to the beneficial effects of the corresponding embodiments in the first aspect, which will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments of the present application will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0037] Figure 1 A schematic diagram of a communication system architecture provided for an implementation manner of the present application;

[0038] Figure 2 A schematic diagram of the structure of a base station provided in an embodiment of the present application;

[0039] Figure 3 A schematic diagram of the composition of an antenna provided in an embodiment of the present application;

[0040] Figure 4 A schematic diagram of the structure of a duplex antenna provided in an embodiment of the present application;

[0041] Figure 5 A schematic diagram of the structure of an all-sky antenna provided in an embodiment of the present application;

[0042] Figure 6 A schematic diagram of a first antenna system provided in an embodiment of the present application;

[0043] Figure 7 A schematic diagram of an antenna system provided in an embodiment of the present application;

[0044] Figure 8 A schematic diagram of the structure of a first load circuit provided in an embodiment of the present application;

[0045] Fig. 9 A schematic diagram of the structure of a second load circuit provided in an embodiment of the present application;

[0046] Fig.10 A schematic diagram of the structure of a third load circuit provided in an embodiment of the present application;

[0047] Fig.11 A schematic diagram of the structure of a fourth load circuit provided in an embodiment of the present application;

[0048] Fig. 12A A schematic diagram of a second antenna system provided in an embodiment of the present application;

[0049] Fig. 12B A schematic diagram of the first isolation degree provided for an implementation manner of the present application;

[0050] Fig.13 A second isolation diagram provided for an embodiment of the present application. DETAILED DESCRIPTION

[0051] The technical solutions in the embodiments of the present application will be described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments.

[0052] In this document, the terms "first", "second", etc. are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, unless otherwise specified, "plurality" means two or more.

[0053] In addition, in this article, directional terms such as "upper" and "lower" are defined relative to the orientation of the structure schematically placed in the drawings. It should be understood that these directional terms are relative concepts. They are used for relative description and clarification, and they can change accordingly according to the change of the orientation of the structure.

[0054] The solid circle in the direction coordinate diagram in the accompanying drawings of the specification represents the direction Y perpendicular to the XZ plane.

[0055] To facilitate understanding of the antenna and base station provided in the embodiments of the present application, their application scenarios are introduced below. Figure 1 A schematic diagram of a communication system architecture is shown as an example. Figure 1As shown, the application scenario may include a base station and a terminal. Wireless communication can be achieved between the base station and the terminal. The base station can be located in a base station subsystem (base btationbubsystem, BBS), a terrestrial radio access network (UMTS terrestrial radio access network, UTRAN) or an evolved terrestrial radio access network (evolved universal terrestrial radio access, E-UTRAN), and is used to provide cell coverage for wireless signals to achieve communication between terminal equipment and a wireless network. Specifically, the base station can be a base transceiver station (BTS) in a global system for mobile communications (GSM) or a (code division multiple access, CDMA) system, or a node B (NodeB, NB) in a wideband code division multiple access (WCDMA) system, or an evolutionary node B (eNB or eNodeB) in a long term evolution (LTE) system, or a wireless controller in a cloud radio access network (CRAN) scenario. Alternatively, the base station may also be a relay station, an access point, a vehicle-mounted device, a wearable device, a g-node (gNodeB or gNB) in a new wireless (NR) system, or a base station in a future evolved network, etc., and the embodiments of the present application are not limited thereto.

[0056] See also Figure 2 , Figure 2 A schematic diagram of the structure of a base station provided for the embodiment of the present application. The base station may generally include structures such as an antenna 1, a pole 2, and an antenna adjustment bracket 3. Among them, the antenna 1 of the base station includes a radome 11, which has good electromagnetic wave penetration characteristics in electrical performance and can withstand the influence of external harsh environment in mechanical performance, thereby protecting the antenna system from the influence of the external environment. The antenna 1 can be installed on the pole 2 or the tower through the antenna adjustment bracket 3 to facilitate the reception or transmission of the antenna 1 signal.

[0057] In addition, the base station may also include a radio frequency processing unit 5 and a baseband processing unit 6. For example, the radio frequency processing unit 5 may be used to perform frequency selection, amplification, and down-conversion processing on the signal received by the antenna 1, and convert it into an intermediate frequency signal or a baseband signal and send it to the baseband processing unit 6, or the radio frequency processing unit 5 may be used to convert the baseband processing unit 6 or the intermediate frequency signal into an electromagnetic wave through the antenna 1 after up-conversion and amplification processing and send it out. The baseband processing unit 6 may be connected to the feeding network of the antenna 1 through the radio frequency processing unit 5. In some embodiments, the radio frequency processing unit 5 may also be referred to as a remote radio unit (RRU), and the baseband processing unit 6 may also be referred to as a baseband unit (BBU). In one possible embodiment, as Figure 2 As shown, the RF processing unit 5 can be integrally provided with the antenna 1, and the baseband processing unit 6 is located at the far end of the antenna 1. In some other embodiments, the RF processing unit 5 and the baseband processing unit 6 can also be located at the far end of the antenna 1 at the same time. The RF processing unit 5 and the baseband processing unit 6 can be connected via a cable 7.

[0058] More specifically, please refer to Figure 2 and Figure 3 , Figure 3 The following is a schematic diagram of the composition of an antenna provided in an embodiment of the present application. Figure 3 As shown, the antenna 1 of the base station may include a radiation unit 500 and a reflector 100. It is worth noting that the radiation unit here generally refers to all radiation units, for example, it may be a positive pole radiation unit and a negative pole radiation unit, etc. The above-mentioned radiation unit 500 may also be called an antenna vibrator, a vibrator or an antenna, etc. The radiation unit 500 is a unit constituting the basic structure of the antenna array, which can effectively send or receive antenna signals. In the antenna 1, the frequencies of different radiation units 500 may be the same or different. The reflector 100 may also be called a bottom plate, an antenna panel or a reflecting surface, etc., which may be made of metal. When the antenna receives a signal, the reflector 100 may reflect the antenna signal and concentrate it on the receiving point, thereby realizing directional reception. When the antenna transmits a signal, the reflector 100 realizes directional transmission of the antenna signal. The radiation unit 500 is usually placed on one side of the reflector 100, which not only greatly enhances the signal reception or transmission capability of the antenna 1, but also blocks and shields interference from other radio waves coming from the back side of the reflector 100 (the back side of the reflector 100 in this application refers to the side opposite to the reflector 100 where the radiation unit 500 is set), thereby improving the gain of the antenna.

[0059] In the antenna 1 of the base station, the radiation unit 500 is connected to the feed network 300. The feed network 300 is usually composed of a controlled impedance transmission line. The feed network 300 can feed the signal to the radiation unit 500 according to a certain amplitude and phase, or send the received signal to the baseband processing unit 6 of the base station according to a certain amplitude and phase. Specifically, in some embodiments, the feed network 300 can realize different radiation beam pointing through the transmission mechanism 400, or be connected to the transmission mechanism 400 to obtain the calibration signal required by the system. The feed network 300 may include a phase shifter 330 to change the maximum direction of antenna signal radiation. Some modules for expanding performance may also be set in the feed network 300, such as a power divider 301, which can be used to combine multiple signals into one signal and transmit it through the antenna 1; or the power divider 301 divides one signal into multiple signals, for example, the signal received by the antenna 1 is divided into multiple channels according to different frequencies and transmitted to the baseband processing unit 6 for processing. For another example, a filter 302 may be provided in the feeding network 300 to filter out interference signals.

[0060] In some scenarios, you can Figure 3 The antenna shown is called an antenna system. For example, the radiation unit 500 includes a plurality of sub-antennas, each of which can be used to receive signals and / or transmit signals according to the RF circuit (RF receiving circuit and / or RF transmitting circuit) to which it is connected. In addition, the antenna in the radiation unit 500 can be used to receive signals and / or transmit signals according to the purpose of the antenna. Figure 3 The antennas shown are classified into duplex antennas, all-dish antennas or simplex antennas, etc. Among them, the duplex antenna can receive and transmit signals at the same time, all sub-antennas in the all-dish antenna can be used to receive signals or transmit signals, and the simplex antenna can only be used to receive signals or transmit signals.

[0061] Next, combine Figure 4 and Figure 5 The structures of a duplex antenna and an all-dish antenna are introduced by way of example.

[0062] See also Figure 4 , Figure 4 A structural schematic diagram of a duplex antenna provided in an embodiment of the present application is used to demonstrate the antenna structure of the duplex antenna and to exemplarily introduce the working mode of the duplex antenna in combination with the antenna structure.

[0063] like Figure 4 As shown, Figure 4 It includes an antenna 410, an isolation device 420, an antenna 430, a radio frequency transmitting circuit and a radio frequency receiving circuit, wherein the antenna 410 is connected to the radio frequency transmitting circuit, the antenna 430 is connected to the radio frequency receiving circuit, and the isolation device 420 is located between the antenna 410 and the antenna 430.

[0064] The antenna 410 and the antenna 430 may be Figure 2 The antenna 1 shown in FIG. 1 may also include an antenna having one or more radiating units 500. For a detailed description of the antenna 410 and the antenna 430, please refer to the above Figure 2 or Figure 3 The above-mentioned radio frequency transmitting circuit or radio frequency receiving circuit can be Figure 2 The RF processing unit 5 shown in FIG. 4 is a RF transmitting circuit or a RF receiving circuit. Figure 2 The introduction of the corresponding content will not be repeated here.

[0065] The isolation device 420 may be a device capable of isolating electromagnetic waves, or a device capable of absorbing electromagnetic waves. For example, the isolation device 420 may be a device having an electromagnetic band gap (EBG) structure, which is a periodic structure that can block the propagation of electromagnetic waves in a specified frequency band by selecting appropriate scattering materials, the size of the scattering materials, and the shape of the scattering materials, thereby achieving the effect of shielding electromagnetic waves and reducing mutual interference between electromagnetic waves. For another example, the isolation device 420 may be an absorbing material that can significantly reduce the energy of the electromagnetic waves received by the absorbing material, thereby achieving the effect of reducing electromagnetic interference.

[0066] from Figure 4 As can be seen in FIG, antenna 410 is connected to the radio frequency transmitting circuit, and antenna 430 is connected to the radio frequency receiving circuit. Therefore, antenna 410 can be used to transmit signals, for example, antenna 410 can be used to transmit signals to the first terminal device. Antenna 430 can be used to receive signals, for example, antenna 430 can receive signals from the second terminal device. The first terminal device and the second terminal device can be the same terminal device, or the first terminal device and the second terminal device can be different terminal devices, which is not limited in the embodiments of the present application.

[0067] It is understandable that, in addition to receiving signals from the second terminal device, antenna 430 can also directly receive signals transmitted from antenna 410. Moreover, the signal received by antenna 430 from antenna 410 will interfere with the signal received by antenna 430 from the second terminal device, reduce the quality of the signal received by antenna 430 from the second terminal device, and increase the difficulty of parsing the signal of the second terminal device. Therefore, in a duplex antenna system, it is usually necessary to add an isolation device (for example, isolation device 420) to prevent the signal transmitted by antenna 410 from being directly received by antenna 430.

[0068] In a possible application scenario, when the isolation device 420 is a device with an EBG structure, the isolation device 420 can block the propagation of the signal transmitted by the antenna 410 to the antenna 430 by selecting appropriate materials, sizes and shapes, etc., thereby reducing the interference of the signal transmitted by the antenna 410 on the signal received by the antenna 430.

[0069] In another possible application scenario, when the isolation device 420 has the ability to absorb electromagnetic waves, the isolation device 420 can absorb the electromagnetic wave signal that propagates through the isolation device 420 to the antenna 430, thereby reducing the interference of the signal emitted by the antenna 410 on the signal received by the antenna 430.

[0070] Although the isolation device 420 can reduce the interference of the signal transmitted by the antenna 410 on the signal received by the antenna 430, the isolation device 420 will take up a large amount of space, resulting in low utilization of the antenna aperture, reducing the antenna's maximum transmission power and ability to receive weak signals, thereby causing the antenna coverage performance to deteriorate.

[0071] In order to fully utilize the aperture of the antenna, improve the maximum transmission power of the antenna and the ability to receive weak signals, thereby improving the coverage performance of the antenna, the embodiment of the present application also provides an all-aerial antenna that can fully utilize the aperture of the antenna to transmit and receive signals.

[0072] See also Figure 5 , Figure 5 A structural schematic diagram of an all-sky antenna provided in an embodiment of the present application is used to demonstrate the antenna structure of the all-sky antenna and to exemplarily introduce the working mode of the all-sky antenna in combination with the antenna structure.

[0073] like Figure 5 As shown, Figure 5 It includes an antenna 510, a circulator, a radio frequency receiving circuit, and a radio frequency transmitting circuit. The antenna 510 is connected to the first port of the circulator, the second port of the circulator is connected to the radio frequency receiving circuit, and the third port of the circulator is connected to the radio frequency transmitting circuit. The flow direction of the signal in the circulator is that the signal entering from the first port of the circulator will flow out from the second port of the circulator, and the signal entering from the third port of the circulator will flow out from the first port of the circulator. It ensures that the signal received by the antenna 510 can flow into the radio frequency receiving circuit, and the signal generated by the radio frequency transmitting circuit can be transmitted by the antenna 510.

[0074] The antenna 510 may be Figure 2 The antenna 1 shown in FIG. 1 may also include an antenna having one or more radiating units 500. For a detailed description of the antenna 510, please refer to the above Figure 2 or Figure 3The above-mentioned radio frequency transmitting circuit or radio frequency receiving circuit can be Figure 2 The RF processing unit 5 shown in FIG. 4 is a RF transmitting circuit or a RF receiving circuit. Figure 2 The introduction of the corresponding content will not be repeated here.

[0075] from Figure 5 It can be seen that Figure 5 The all-aerial antenna shown can make full use of the aperture of the antenna. For example, the signal generated by the RF transmitting circuit can be transmitted to the antenna 510 through the circulator and transmitted by the antenna 510. For another example, the antenna 510 can receive a signal from a terminal device and transmit it to the RF receiving circuit through the circulator, which is processed and analyzed by the RF receiving circuit. It is understandable that the antenna 510 cannot be used to receive and transmit signals at the same time. The antenna 510 can only be used to receive or transmit signals at the same time. Therefore, the antenna 510 cannot be used for duplex communication, so the resources of the transceiver channel cannot be reused, which increases the cost of data transmission.

[0076] Above Figure 4 and Figure 5 Duplex antennas and all-aerial antennas are introduced respectively. However, the existing duplex antennas cannot fully utilize the antenna aperture, and the all-aerial antennas cannot perform duplex communication, and both have disadvantages in communication performance.

[0077] In view of this, the embodiment of the present application provides an antenna system that can fully utilize the aperture of the antenna and has the ability of duplex communication. In addition, the antenna system provided by the present application can also adjust the working mode of the antenna system based on the specific application scenario, which can improve the communication performance of the antenna system in the current application scenario, thereby meeting the communication needs of the application scenario as much as possible.

[0078] See also Figure 6 , Figure 6 The first antenna system schematic diagram provided for the implementation of the present application, when the antenna system is applied to a scenario with good coverage, the isolation between the transmitting and receiving antennas can be improved through spatial wave cancellation, and a sub-band duplex architecture can be implemented to improve the cell capacity. When the antenna system is applied to a scenario with poor coverage, the antenna aperture can be fully utilized to improve the aperture utilization, thereby improving the coverage of uplink and downlink communications.

[0079] like Figure 6 As shown, Figure 6 The first antenna 610, the third antenna 620, the second antenna 630, the first radio frequency circuit, the second radio frequency circuit, the third radio frequency circuit, a switch device and a load circuit are included. The first antenna 610, the third antenna 620 and the second antenna 630 can be Figure 2The antenna 1 shown in FIG. 1 may also include an antenna having one or more radiating units 500. For a detailed description of the first antenna 610, the third antenna 620 and the second antenna 630, reference may be made to the above Figure 2 or Figure 3 The introduction of the corresponding content will not be repeated here.

[0080] Exemplarily, the number of radiation units 500 included in the first antenna 610, the third antenna 620, and the second antenna 630 may be equal or unequal, and the embodiment of the present application does not limit this. For example, the first antenna 610 and the second antenna 630 each include 50 radiation units 500, and the third antenna 620 includes 30 radiation units 500. For another example, the first antenna 610, the third antenna 620, and the second antenna 630 each include 50 radiation units 500. For another example, the first antenna 610 includes 50 radiation units 500, the second antenna 630 includes 40 radiation units 500, and the third antenna 620 includes 30 radiation units 500.

[0081] The first radio frequency circuit, the second radio frequency circuit and the third radio frequency circuit may be Figure 2 The RF processing unit 5 shown in FIG. 4 is a RF transmitting circuit or a RF receiving circuit. Figure 2 The introduction of the corresponding content will not be repeated here.

[0082] In a possible scenario, the first RF circuit and the second RF circuit include at least one RF receiving circuit and one RF transmitting circuit. The RF receiving circuit is used to perform frequency selection, amplification, and down-conversion processing on the signal received by the antenna, and convert it into an intermediate frequency signal or a baseband signal and send it to the baseband processing unit. The RF transmitting circuit is used to perform up-conversion and power amplification processing on the baseband signal or the intermediate frequency signal. For example, the first RF circuit may be a RF transmitting circuit, and the second RF circuit may be a RF receiving circuit. For another example, the first RF circuit may be a RF receiving circuit, and the second RF circuit may be a RF transmitting circuit. For another example, the first RF circuit may include a RF transmitting circuit and a RF receiving circuit. Specifically, the first antenna 610 and the RF transmitting circuit and the RF receiving circuit included in the first RF circuit may be connected through a circulator, so that the first antenna 610 can be used to transmit and receive signals. Similarly, the second RF circuit may also include a RF transmitting circuit and a RF receiving circuit. Specifically, the second antenna 630 and the RF transmitting circuit and the RF receiving circuit included in the second RF circuit may be connected through a circulator, so that the second antenna 630 can be used to transmit and receive signals.

[0083] In addition, the third RF circuit may include an RF transmitting circuit and / or an RF receiving circuit, and the type of RF circuit specifically included in the third RF circuit is not limited in the embodiments of the present application. Exemplarily, the type of the third RF circuit can be determined according to the requirements of the application scenario. For example, in the case where the uplink signal strength is insufficient, the type of the third RF circuit can be determined as an RF receiving circuit, which is used to improve the ability of the antenna system to receive weak signals, thereby improving the uplink coverage. For another example, in the case where the downlink signal strength is insufficient, the type of the third RF circuit can be determined as an RF transmitting circuit, which is used to increase the power of the antenna system transmitting the signal, thereby improving the downlink coverage.

[0084] The switch device can connect the third antenna 620 to the third radio frequency circuit, or the switch device can connect the third antenna 620 to the load circuit. For example, the switch device can be a single-pole double-throw switch. The first end of the switch device is connected to the third antenna 620, the second end of the switch device is connected to the third radio frequency circuit, and the third end of the switch device is connected to the load circuit. The switch device can connect the first end to the second end, or the switch device can connect the first end to the third end.

[0085] The load circuit can be, for example, a lumped parameter circuit, a distributed parameter circuit, or a circuit obtained by combining a lumped parameter circuit and a distributed parameter circuit. The load circuit can cause a change in the phase or amplitude of the passing signal. For a detailed introduction to the load circuit, please refer to the subsequent related content, which will not be described in detail here.

[0086] In a possible implementation, when a preset condition is met, the third antenna 620 can be connected to the third RF circuit, or the third antenna can be connected to the load circuit by controlling the switch device. Specifically, the following situations may be included:

[0087] Case 1: When the downlink coverage of the antenna system is poor, the switch device is controlled so that the third antenna 620 is connected to the third RF circuit.

[0088] The antenna system can be Figure 6The antenna system shown. Poor downlink coverage may refer to the phenomenon that the coverage range of the signal transmitted by the antenna system is small, the signal transmission power of the antenna system is small, or the signal strength received by the terminal device from the antenna system is low. For example, the coverage range of the antenna system is less than 10m, the signal transmission power of the antenna system is less than 10dBm, or the terminal device 50m away from the antenna system receives a signal strength from the antenna system of less than 2dBm. In the specific implementation process, the embodiment of the present application does not limit the method for judging the downlink coverage difference. For example, it may be a preset program inside the antenna system, which obtains the judgment result of the downlink coverage difference through calculation. It may also be that the user sends an indication message to the antenna system through the human-computer interaction interface, indicating the downlink coverage of the antenna system is poor.

[0089] When it is determined that the downlink coverage of the antenna system is poor, the control unit inside the antenna system may send control instruction information to the switching device to connect the third antenna 620 to the third RF circuit, or the user may send control instruction information to the switching device through the human-computer interaction interface to connect the third antenna 620 to the third RF circuit. The implementation manner of the present application does not limit this.

[0090] It can be understood that in this case, the third RF circuit includes a RF transmitting circuit, which allows the third antenna 620 to be used to transmit signals, thereby enhancing the transmit signal power of the antenna system, thereby improving the downlink coverage of the antenna system.

[0091] Case 2: When the uplink coverage of the antenna system is poor, the switch device is controlled so that the third antenna 620 is connected to the third RF circuit.

[0092] The antenna system can be Figure 6 The antenna system shown. Poor uplink coverage may refer to phenomena such as low signal gain of the antenna system receiving signals or poor ability of the antenna system to receive weak signals. For example, when the signal transmission power of the terminal device remains unchanged, the antenna system can receive signals transmitted by a terminal device that is at most 10m away from the antenna system. In the specific implementation process, the embodiment of the present application does not limit the method for judging poor uplink coverage. For example, it may be a preset program inside the antenna system, which obtains the judgment result of poor uplink coverage through calculation. It may also be that the user sends an indication message to the antenna system through the human-computer interaction interface, indicating that the antenna system has poor uplink coverage.

[0093] When it is determined that the uplink coverage of the antenna system is poor, the control unit inside the antenna system may send control instruction information to the switching device to connect the third antenna 620 to the third RF circuit, or the user may send control instruction information to the switching device through the human-computer interaction interface to connect the third antenna 620 to the third RF circuit. The implementation manner of the present application does not limit this.

[0094] It can be understood that in this case, the third RF circuit includes a RF receiving circuit, which allows the third antenna 620 to receive signals, thereby enhancing the gain of the received signal of the antenna system, thereby improving the uplink coverage of the antenna system.

[0095] Case 3: When the antenna system has good uplink and downlink coverage, the switch device is controlled so that the third antenna 620 is connected to the load circuit.

[0096] The antenna system can be Figure 6 The antenna system shown. Good uplink and downlink coverage may mean that the effective coverage range of the antenna system transmitting the signal is greater than or equal to the preset range, and the antenna system can receive the signal from the target terminal device. Alternatively, the antenna system can communicate normally with the target terminal device. Alternatively, good uplink and downlink coverage may refer to excluding the cases other than poor downlink coverage (case one) and poor uplink coverage (case two).

[0097] When it is determined that the antenna system has good uplink and downlink coverage, the control unit inside the antenna system can send control instruction information to the switching device to connect the third antenna 620 to the load circuit, or the user can send control instruction information to the switching device through the human-computer interaction interface to connect the third antenna 620 to the load circuit. The implementation manner of the present application does not limit this.

[0098] It can be understood that the signal passing through the load circuit may produce a change in phase and / or amplitude. By setting the structure and parameters of the load circuit, the signal passing through the load circuit can produce a specified change in phase and / or amplitude, so that the third antenna 620 can receive the signal and make the received signal produce a specified change in phase and / or amplitude, and then transmit it. The signal transmitted by the third antenna 620 has a change in phase and / or amplitude relative to the original signal (the signal received by the third antenna 620). Therefore, the signal transmitted by the third antenna 620 can offset the original signal, so that the original signal can reduce the interference to other signals. For example, the first antenna 610 is used to transmit a signal, and the second antenna 630 is used to receive a signal. The signal transmitted by the first antenna 610 will interfere with the signal received by the second antenna 630. If the third antenna 620 is connected to the load circuit, so that the third antenna 620 receives the signal transmitted by the first antenna 610, and transmits a signal with a change in phase and / or amplitude, which is used to offset the signal transmitted by the first antenna 610, it can reduce the interference of the signal transmitted by the first antenna 610 to the second antenna 630.

[0099] Next, the connection of the third antenna 620 to the load circuit is exemplarily introduced with reference to the accompanying drawings.

[0100] See also Figure 7 , Figure 7 A schematic diagram of the operation of an antenna system provided in an embodiment of the present application is used to show how to reduce the interference of the signal transmitted by the first antenna 610 on the signal received by the second antenna 630 when the third antenna 620 is connected to a load circuit.

[0101] like Figure 7 As shown, Figure 7 The first antenna 610, the second antenna 630 and the third antenna 620 are included, wherein the first antenna 610 can be Figure 6 The first antenna 610 shown in FIG. 6A and the second antenna 630 may be Figure 6 The second antenna 630 shown in FIG. 6A and the third antenna 620 may be Figure 6 For an introduction to the first antenna 610, the second antenna 630 and the third antenna 620, see Figure 6 The corresponding description in will not be repeated here. In addition, Figure 7 The sub-antennas included in the first antenna 610, the second antenna 630, and the third antenna 620 are also exemplarily shown. For example, the first antenna 610 may include L sub-antennas, which are sub-antenna 11, sub-antenna 12, ..., and sub-antenna 1L. The second antenna 630 may include M sub-antennas, which are sub-antenna 21, sub-antenna 22, ..., and sub-antenna 2M. The third antenna 620 may include N sub-antennas, which are sub-antenna 31, sub-antenna 32, ..., and sub-antenna 3N. Among them, L, M, and N are all positive integers. For the convenience of description, it can be assumed that L, M, and N are all equal to 3.

[0102] In one possible scenario, the antenna system composed of the first antenna 610, the second antenna 630 and the third antenna 620 can be a duplex antenna. For example, the first antenna 610 is used to transmit signals, the second antenna 630 is used to receive signals, and the third antenna 620 is connected to a load circuit to shield the interference of the signal transmitted by the first antenna 610 on the signal received by the second antenna 630. Among them, the L sub-antennas included in the first antenna 610 can transmit signals simultaneously or in time-sharing, and the implementation mode of the present application is not limited to this. For example, taking L equal to 3 as an example, the sub-antenna 11, sub-antenna 12 and sub-antenna 13 in the first antenna 610 can transmit signals simultaneously, or only some of the sub-antennas can transmit signals at the same time. For example, sub-antenna 11 and sub-antenna 12 can transmit signals at the same time, or sub-antenna 11, sub-antenna 12 and sub-antenna 13 can transmit signals at different times. However, the L sub-antennas included in the first antenna 610, whether transmitting signals simultaneously or in time-sharing, can simplify the signal transmitted by the first antenna 610 into one signal, such as Figure 7Signal A shown. Similarly, the N sub-antennas in the second antenna 630 may receive signals simultaneously, or only some of the sub-antennas may receive signals at the same time, and the embodiments of the present application do not limit this. For example, taking N equals 3 as an example, the sub-antenna 31, sub-antenna 32 and sub-antenna 33 in the second antenna 630 may receive signals simultaneously, or only some of the sub-antennas may receive signals at the same time, for example, sub-antenna 31 and sub-antenna 32 may receive signals at the same time, or sub-antenna 31, sub-antenna 32 and sub-antenna 33 may receive signals at different times. However, the N sub-antennas included in the second antenna 630, whether receiving signals simultaneously or receiving signals in time division, can take one antenna in the second antenna 630 as an example to introduce the process of the second antenna 630 receiving signals.

[0103] Understandably, Figure 7 In addition to being received by the terminal device, the signal A transmitted by the first antenna 610 can also be received by the third antenna 620 and the second antenna 630. For example, the signal A can be received by the sub-antenna 21, sub-antenna 22, sub-antenna 2M, etc. of the third antenna 620, and can also be received by the sub-antenna 31, sub-antenna 32, sub-antenna 3N, etc. of the second antenna 630. Next, taking the sub-antenna 31 in the second antenna 630 as an example, it is exemplarily described how to eliminate the interference of the signal transmitted by the first antenna 610 on the signal received by the second antenna 630 when the second antenna is connected to the load circuit.

[0104] from Figure 7 It can be seen that when sub-antenna 21 receives signal A, it will emit signal 1. When sub-antenna 22 receives signal A, it will emit signal 2. When sub-antenna 2M receives signal A, it will emit signal 3. Among them, signal 1, signal 2 and signal 3 are all signals obtained after signal A changes in phase and / or amplitude, and signal 1, signal 2, signal 3 and signal A can all be received by sub-antenna 31. It is equivalent to that the signal received by sub-antenna 31 is a signal formed by superposition of signal 1, signal 2, signal 3 and signal A. It can be understood that the change in phase and / or amplitude of signal 1, signal 2 and signal 3 compared with signal A is related to the load circuit connected to the third antenna 620 (for how to control the change in phase and / or amplitude by adjusting the parameters and structure of the load circuit, please refer to the subsequent related description, which will not be described in detail here). Therefore, by setting a load circuit with suitable parameters and structure, the signal obtained by superposition of signal 1, signal 2 and signal 3 can offset each other with signal A, thereby reducing the interference of signal A on the signal received by sub-antenna 31. This is equivalent to a signal obtained by superimposing signal 1, signal 2, and signal 3, which is 180° out of phase with signal A and has the same amplitude. Similarly, for the interference of signal A to other sub-antennas in the second antenna 630, reference can also be made to the implementation method of reducing the interference of signal A to sub-antenna 31, which will not be repeated here.

[0105] In a possible implementation manner, the load circuit includes a plurality of sub-load circuits.

[0106] The first antenna, the second antenna or the third antenna may include a plurality of sub-antennas, and the corresponding load circuit may also include a plurality of sub-load circuits, and the number of load circuits may not be equal to the number of sub-antennas in the third antenna 620. For example, the third antenna 620 includes M sub-antennas, and the load circuit may include K sub-load circuits, K may not be equal to M, for example, M=3, K may be equal to 2, 3, 4, or 5, etc., which is not limited in the implementation of the present application. Exemplarily, the number of load circuits may be determined by the cost, volume, function, etc. of the antenna. For example, the more load circuits there are, the higher the cost of the antenna is generally, and the fewer load circuits there are, the lower the cost of the antenna is generally. Therefore, the number of load circuits may be determined according to the cost of the antenna. For another example, the load circuit usually needs to occupy a certain space, so the volume of the antenna will also affect the number of load circuits. For another example, the load circuit can adjust the amplitude and / or phase of the signal, so more load circuits may achieve more accurate amplitude and / or phase adjustment, thereby achieving richer functions.

[0107] The switch circuit connects the third antenna 620 to the load circuit, which may include one or more of the following situations:

[0108] Case 1: The M sub-antennas of the third antenna 620 are all connected to one sub-load circuit.

[0109] Wherein, M is a positive integer, and the number of sub-load circuits needs to be greater than or equal to M. For example, M can be 3, which are sub-antenna 21, sub-antenna 22 and sub-antenna 23 respectively. The number of sub-load circuits can be 4, which are sub-load circuit 1, sub-load circuit 2, sub-load circuit 3 and sub-load circuit 4 respectively. The above sub-antennas can be connected to any sub-load circuit, for example, sub-antenna 21 can be connected to sub-load circuit 1, and can also be connected to sub-load circuit 2, etc. For another example, sub-antenna 22 can be connected to sub-load circuit 2, and can also be connected to sub-load circuit 3, etc. The M sub-antennas of the third antenna 620 are all connected to a sub-load circuit, for example, sub-antenna 21 can be connected to sub-load circuit 1, sub-antenna 22 can be connected to sub-load circuit 3, and sub-antenna 23 can be connected to sub-load circuit 4. It can also be that sub-antenna 21 is connected to sub-load circuit 2, sub-antenna 22 is connected to sub-load circuit 1, and sub-antenna 23 is connected to sub-load circuit 3.

[0110] The embodiments of the present application do not limit which sub-load circuit the sub-antenna is specifically connected to. For example, the connection relationship between the sub-antenna in the third antenna 620 and the sub-load circuit in the load circuit can be determined based on the type, phase characteristics, amplitude characteristics, etc. of the signal A transmitted by the first antenna 610. In some scenarios, the connection relationship between the sub-antenna in the third antenna 620 and the load circuit can also be adjusted based on the change of the signal A.

[0111] Case 2: some of the M sub-antennas of the third antenna 620 are connected to the sub-load circuit.

[0112] Wherein, M is a positive integer, and the number of sub-load circuits is also a positive integer. For example, M can be 3, which are sub-antenna 21, sub-antenna 22, and sub-antenna 23. The number of sub-load circuits can be 5, which are sub-load circuit 1, sub-load circuit 2, sub-load circuit 3, sub-load circuit 4, and sub-load circuit 5. For example, some of the sub-antennas in the M sub-antennas of the third antenna 620 are connected to the sub-load circuit, such as sub-antenna 21 is connected to sub-load circuit 1, sub-antenna 22 is connected to sub-load circuit 3, and sub-antenna 23 is not connected to the load circuit. It can also be that sub-antenna 21 is connected to sub-load circuit 2, sub-antenna 22 is not connected to the load circuit, and sub-antenna 23 is connected to sub-load circuit 4.

[0113] Case 3: the sub-antennas in the third antenna 620 may be connected to different sub-load circuits at different times.

[0114] For example, the sub-antenna 21 is a sub-antenna of the third antenna 620, and the sub-load circuit 1 and the sub-load circuit 2 are sub-load circuits of the load circuit. The sub-antenna 21 can be connected to the sub-load circuit 1 at a first moment, and the sub-antenna 21 can be connected to the sub-load circuit 2 at a second moment. The first moment and the second moment are two different moments. For example, the first moment and the second moment can be moments after the third antenna 620 is connected to the load circuit, wherein the first moment can be a moment before the second moment.

[0115] In one possible implementation, the load circuit may include one or more of a capacitor, an inductor, and a resistor, and the parameters of the capacitor, inductor, and resistor in the load circuit are not limited in the implementation of the present application. By setting the structure of the load circuit and the parameters of the components, the signal phase and / or amplitude can be adjusted, thereby achieving the effect of spatial wave cancellation. The load circuit may include one or more of the following forms:

[0116] Form 1: The load circuit includes a series circuit.

[0117] See also Figure 8 , Figure 8 A schematic diagram of the structure of a first load circuit provided in an embodiment of the present application, Figure 8It includes a signal interface 801, a first circuit 802, a main transmission line 803 and a second circuit 804. The signal interface 801, the first circuit 802, the main transmission line 803 and the second circuit 804 can be connected in series.

[0118] The signal interface 801 is used to connect to the antenna. The signal received by the antenna can be transmitted to the load circuit through the signal interface 801, or the signal in the load circuit can be transmitted to the antenna through the signal interface 801. For example, the signal interface 801 can be connected to Figure 6 The third antenna 620 shown in the figure, the signal received by the third antenna 620 can be transmitted to the first circuit 802, the main transmission line 803, the second circuit 804, etc. through the signal interface 801. The signals in the first circuit 802, the main transmission line 803, and the second circuit 804 can also be transmitted to the third antenna 620 through the signal interface 801.

[0119] The first circuit 802 and the second circuit 804 may each include one or more capacitors, resistors and inductors. The implementation of the present application does not limit the number and parameters of the components included in the first circuit 802 and the second circuit 804. For example, the first circuit 802 includes a 5-ohm resistor, and the second circuit 804 includes an inductor and a capacitor. The size of the inductor may be 2 Henrys, and the size of the capacitor may be 3 Farads. The main transmission line 803 may be a signal line of a target length, and the implementation of the present application does not limit the target length. For example, the length of the main transmission line 803 may be 10m, and the resistor may be 0.2 ohms. It is understandable that energy loss will occur when the signal is transmitted on the resistor, and the corresponding signal amplitude will be reduced. The capacitor will cause the phase of the signal to lag, and the amplitude of the signal phase lag is related to the size of the capacitor. In some scenarios, the larger the capacitance, the greater the amplitude of the signal phase lag, and the smaller the capacitance, the smaller the amplitude of the signal phase lag. The inductor will advance the phase of the signal, and the amplitude of the signal phase advance is related to the size of the inductor. In some scenarios, the larger the inductance, the greater the amplitude of the signal phase advance, and the smaller the inductance, the smaller the amplitude of the signal phase advance. In addition, the long-distance transmission of the signal on the transmission line will also cause the signal phase to change. The amplitude of the signal phase change is related to the length of the transmission line. In some scenarios, the longer the signal line, the greater the amplitude of the signal phase change, and the shorter the signal line, the smaller the amplitude of the signal phase change.

[0120] visible, Figure 8 The load circuit shown can cause a signal to produce a change in phase and / or amplitude. The phase and / or amplitude of the signal passing through the load circuit can be adjusted by adjusting parameters in the load circuit.

[0121] Form 2: The load circuit includes a parallel circuit.

[0122] See also Fig. 9 , Fig. 9 A schematic diagram of the structure of a second load circuit provided in an embodiment of the present application, Fig. 9 The device comprises a signal interface 901, a first circuit 902, a second circuit 903, a third circuit 904, a fourth circuit 905 and a fifth circuit 906. The third circuit 904, the fourth circuit 905 and the fifth circuit 906 form a parallel circuit.

[0123] The signal interface 901 is used to connect the antenna, and the signal received by the antenna can be transmitted to the load circuit through the signal interface 901, or the signal in the load circuit can be transmitted to the antenna through the signal interface 901. For specific implementations, reference can be made to the relevant description of the signal interface 801, which will not be repeated here.

[0124] The first circuit 902, the second circuit 903, the third circuit 904, the fourth circuit 905 and the fifth circuit 906 may include one or more capacitors, resistors and inductors. The embodiment of the present application does not limit the number and parameters of the components included in the first circuit 902, the second circuit 903, the third circuit 904, the fourth circuit 905 and the fifth circuit 906. For specific implementations, reference may be made to the relevant description of the first circuit 802 or the second circuit 804, which will not be repeated here. It can be understood that by adjusting the parameters and connection methods of the components in the first circuit 902, the second circuit 903, the third circuit 904, the fourth circuit 905 and the fifth circuit 906, the phase and / or amplitude of the signal passing through the load circuit can be adjusted.

[0125] Form three: The load circuit includes a lumped parameter circuit.

[0126] See also Fig.10 , Fig.10 A schematic diagram of the structure of a third load circuit provided in an embodiment of the present application, Fig.10 The circuit 1001 includes a signal interface 1001, a first circuit 1002, a lumped parameter circuit 1003, a second circuit 1004 and a third circuit 1005. The lumped parameter circuit 1003 can be an adjustable lumped parameter circuit or a non-adjustable lumped parameter circuit. The circuit parameters (including capacitance, inductance and resistance) in the above-mentioned adjustable lumped parameter circuit can be adjusted, and the circuit parameters (including capacitance, inductance and resistance) in the non-adjustable lumped parameter circuit cannot be adjusted. For example, the resistance in the adjustable lumped parameter circuit can be adjusted from 5 ohms to 6 ohms, the capacitance can be adjusted from 3 farads to 2 farads, the inductance can be adjusted from 4 Henrys to 7 Henrys, etc. The capacitance, inductance and resistance in the non-adjustable lumped parameter circuit are all fixed values ​​and cannot be adjusted after being determined.

[0127] The signal interface 1001 is used to connect the antenna, and the signal received by the antenna can be transmitted to the load circuit through the signal interface 1001, or the signal in the load circuit can be transmitted to the antenna through the signal interface 1001. For specific implementations, reference can be made to the relevant description of the signal interface 801, which will not be repeated here.

[0128] The first circuit 1002, the second circuit 1004 and the third circuit 1005 may include one or more capacitors, resistors and inductors. The embodiment of the present application does not limit the number and parameters of the components included in the first circuit 1002, the second circuit 1004 and the third circuit 1005. For specific implementations, reference may be made to the relevant description of the first circuit 802 or the second circuit 804, which will not be repeated here. It can be understood that by adjusting the parameters and connection methods of the components in the first circuit 1002, the second circuit 1004 and the third circuit 1005, the phase and / or amplitude of the signal passing through the load circuit can be adjusted.

[0129] The above-mentioned lumped parameter circuit 1003 may also be composed of one or more capacitors, resistors and inductors, but the lumped parameter circuit 1003 is regarded as a component and exhibits a fixed capacitance value, inductance value or resistance value. For example, the lumped parameter circuit 1003 may be a device with a capacitance value of 3 farads, an inductance value of 5 Henrys, and a resistance value of 2 ohms. The specific parameters exhibited by the lumped parameter circuit 1003 are not limited in the embodiments of the present application.

[0130] Form 4: The load circuit can include series circuits, parallel circuits and lumped parameter circuits at the same time.

[0131] See also Fig.11 , Fig.11 A schematic diagram of the structure of a fourth load circuit provided in an embodiment of the present application, Fig.11 It includes a signal interface 1101, a first circuit 1102, a second circuit 1103, a third circuit 1104, a lumped parameter circuit 1105, a fourth circuit 1106, a fifth circuit 1107, a sixth circuit 1108 and a seventh circuit 1109. Among them, the first circuit 1102, the second circuit 1103, the third circuit 1104 and the lumped parameter circuit 1105 form a series circuit. The circuit composed of the fourth circuit 1106 and the fifth circuit 1107 and the circuit composed of the third circuit 1104 and the lumped parameter circuit 1105 form a parallel circuit. The circuit composed of the lumped parameter circuit 1105 and the sixth circuit 1108 and the seventh circuit 1109 forms a parallel circuit. It can be seen that Fig.11 The circuit shown includes a series circuit, a parallel circuit and a lumped parameter circuit, and, Fig.11 There are two parallel circuits involved.

[0132] The signal interface 1101 is used to connect the antenna, and the signal received by the antenna can be transmitted to the load circuit through the signal interface 1101, or the signal in the load circuit can be transmitted to the antenna through the signal interface 1101. For specific implementations, reference can be made to the relevant description of the signal interface 801, which will not be repeated here.

[0133] The number and parameters of components included in the first circuit 1102, the second circuit 1103, the third circuit 1104, the lumped parameter circuit 1105, the fourth circuit 1106, the fifth circuit 1107, the sixth circuit 1108 and the seventh circuit 1109 are not limited. For specific implementations, reference can be made to the relevant descriptions of the first circuit 802, the second circuit 804 or the lumped parameter circuit 1003, which will not be repeated here. It can be understood that by adjusting the parameters and connection methods of the components in the first circuit 1102, the second circuit 1103, the third circuit 1104, the lumped parameter circuit 1105, the fourth circuit 1106, the fifth circuit 1107, the sixth circuit 1108 and the seventh circuit 1109, the phase and / or amplitude of the signal passing through the load circuit can be adjusted.

[0134] It should be noted that the above Figure 8-Figure 11 The form of the load circuit shown is exemplary, and may include more or fewer components in a specific implementation, but in essence, the effect of adjusting the amplitude and / or phase of the signal is achieved through a combination of one or more of capacitors, inductors, and resistors. This method of achieving the effect of adjusting the amplitude and / or phase of the signal through a combination of one or more of capacitors, inductors, and resistors, and then achieving the cancellation of spatial waves, all falls within the protection scope of the embodiments of the present application.

[0135] In a possible implementation, the end components of the load circuit can be grounded or open-circuited. The end of the load circuit can be a device that has only one end connected to other components except the signal interface, for example, the second circuit 804, the third circuit 904, the fifth circuit 906, the third circuit 1005, the lumped parameter circuit 1105, the fifth circuit 1107 and the seventh circuit 1109. When the end components are grounded, it is equivalent to connecting a resistor with a resistance of 0 to the end components. When the end components are open-circuited, it is equivalent to connecting a resistor with an infinite resistance to the end components.

[0136] It is understandable that the above Figure 8 and Fig. 9 The load circuit shown is a distributed parameter circuit. Fig.10 The displayed load circuit includes a lumped parameter circuit and a distributed parameter circuit. The load circuit may also be a circuit composed only of a lumped parameter circuit, which is not limited in the implementation mode of the present application.

[0137] In summary, the influence of the load circuit on the signal amplitude and / or phase can be adjusted by changing the structure and parameters of the load circuit, so that the signal passing through the load circuit produces a preset amplitude and / or phase adjustment. The signal with amplitude and / or phase adjustment (for example, Figure 7 1, 2, and 3), can be compared with the original signal (for example, Figure 7 By superimposing the signal A in the above-mentioned figure, the superimposed signal can be made into a weak signal (for example, a signal with an amplitude much lower than the original signal), thereby reducing the interference of the original signal on other signals.

[0138] In order to better demonstrate the technical effects of the implementation methods of this application, please Fig. 12A , Fig. 12B , Figure 6 and Fig.13 , the technical effects of the implementation methods of this application are explained.

[0139] See also Fig. 12A , Fig. 12A The second antenna system schematic diagram provided for the embodiment of the present application is used to demonstrate the isolation between the transmitting and receiving antennas in the duplex antenna system without an isolation device. Fig. 12A The first antenna 610 includes a first antenna 610, a second antenna 630, a first radio frequency circuit, and a second radio frequency circuit. The first antenna 610 is connected to the first radio frequency circuit, the second antenna 630 is connected to the second radio frequency circuit, and the distance between the first antenna 610 and the second antenna 630 is the target distance. For the introduction of the first antenna 610, the second antenna 630, the first radio frequency circuit, and the second radio frequency circuit, please refer to Figure 6 The corresponding description will not be repeated here.

[0140] In a possible scenario, the first RF circuit includes a RF transmitting circuit, and the first antenna 610 can be used to transmit signals. The second RF circuit includes a RF receiving circuit, and the second antenna 630 can be used to receive signals. This is equivalent to, Fig. 12A In the duplex antenna system shown, the first antenna 610 is used to transmit signals, and the second antenna 630 is used to receive signals. The signal transmitted by the first antenna 610 may interfere with the signal received by the second antenna 630. Fig. 12A The target distance in is the distance between the first antenna 610 and the second antenna 630, which may be 105 mm, for example.

[0141] See also Fig. 12B , Fig. 12B The first isolation diagram provided in the embodiment of the present application is used to show Fig. 12A Isolation of the duplex antenna system shown. Fig. 12BThe horizontal axis in the figure represents the frequency of the signal, and the vertical axis represents the signal strength. The multiple curves on the axis represent the signal strength of the second antenna 630 receiving the first antenna 610. Fig. 12B It can be seen that in the frequency band from 4.8 GHz to 4.9 GHz, the signal strength received by the second antenna 630 is the largest at -53.1 dB. Therefore, in the frequency band from 4.8 GHz to 4.9 GHz, Fig. 12A The isolation of the duplex antenna system shown is 53.1dB. The 4.8GHz-4.9GHz frequency band can be Fig. 12A The operating frequency band of the duplex antenna system shown.

[0142] See also Figure 6 ,about Figure 6 For an introduction to , please refer to the corresponding description above, which will not be repeated here.

[0143] In one possible scenario, Figure 6 The first RF circuit includes a RF transmitting circuit, and the first antenna 610 can be used to transmit signals. The second RF circuit includes a RF receiving circuit, and the second antenna 630 can be used to receive signals. This is equivalent to, Figure 6 In the duplex antenna system shown, the first antenna 610 is used to transmit signals, and the second antenna 630 is used to receive signals. The signal transmitted by the first antenna 610 may interfere with the signal received by the second antenna 630. Figure 6 The third antenna 620 in the embodiment is connected to the load circuit through a switch device, so as to increase the isolation between the first antenna 610 and the second antenna 630. In addition, the distance between the first antenna 610 and the second antenna 630 can be Fig. 12A , for example, the distance between the first antenna 610 and the second antenna 630 may be 105 mm.

[0144] See also Fig.13 , Fig.13 A second isolation diagram provided in the embodiment of the present application is used to illustrate Figure 6 Isolation of the duplex antenna system shown. Fig.13 The horizontal axis in the figure represents the frequency of the signal, and the vertical axis represents the signal strength. The multiple curves on the axis represent the signal strength of the second antenna 630 receiving the first antenna 610. Fig.13 It can be seen that in the frequency band from 4.8 GHz to 4.9 GHz, the signal strength received by the second antenna 630 is the largest -65.7 dB. Therefore, in the frequency band from 4.8 GHz to 4.9 GHz, Figure 6 The isolation of the duplex antenna system shown is 65.7dB. The 4.8GHz-4.9GHz frequency band can be Figure 6 The operating frequency band of the duplex antenna system shown.

[0145] Combination Fig. 12B and Fig.13 It can be seen that when the third antenna is connected to the load circuit, the isolation between the first antenna 610 and the second antenna 630 is increased by 12.6 dB, which can reduce the interference of signals in the duplex antenna system and improve the quality of the received signals of the duplex antenna system.

[0146] In summary, the above Figure 6 The antenna system shown can connect the third antenna 620 to the third RF circuit in the case of poor coverage, so that the third antenna 620 can be used to transmit or receive signals, thereby improving the uplink and downlink coverage of the antenna system and improving the aperture utilization. Figure 6 The antenna system shown can also connect the third antenna 620 to the load circuit when the coverage scenario is good, thereby increasing the isolation between the first antenna 610 and the second antenna 630, achieving the effect of improving isolation, and thus meeting the requirements of duplex communication.

Claims

1. An antenna system, characterized in that: The antenna system comprises: a first antenna, a second antenna, and a third antenna, wherein the third antenna is located between the first antenna and the second antenna; a first radio frequency circuit, a second radio frequency circuit and a third radio frequency circuit, wherein the first radio frequency circuit is connected to the first antenna, and the second radio frequency circuit is connected to the second antenna; A switching device and a load circuit, the third antenna is connected to the switching device; the switching device is used to connect the third antenna to the third radio frequency circuit or the load circuit; the switching device is used to connect the third antenna to the load circuit, or to connect the third antenna to the third radio frequency circuit.

2. The antenna system according to claim 1, characterized in that The load circuit includes a lumped parameter circuit and / or a distributed parameter circuit.

3. The antenna system according to claim 1 or 2, characterized in that: The first radio frequency circuit includes a radio frequency transmitting circuit, and the second radio frequency circuit includes a radio frequency receiving circuit.

4. The antenna system according to claim 3, characterized in that The first radio frequency circuit further includes a radio frequency receiving circuit, and / or the second radio frequency circuit further includes a radio frequency transmitting circuit.

5. The antenna system according to any one of claims 1 to 4, characterized in that: The third radio frequency circuit includes a radio frequency transmitting circuit and / or a radio frequency receiving circuit.

6. The antenna system according to any one of claims 1 to 5, characterized in that: When the switch device connects the third antenna to the load circuit; the first antenna is used to transmit a first signal, and the first signal and the second signal received by the second antenna have different amplitudes and / or phases.

7. The antenna system according to claim 6, characterized in that: The third antenna is used to receive the first signal and transmit the second signal; The second signal is the first signal processed by the load circuit.

8. The antenna system according to any one of claims 1 to 5, characterized in that: When the switch device connects the third antenna to the third RF circuit; when the third RF circuit is a RF receiving circuit, the first antenna transmits signals, and the second antenna and the third antenna receive signals.

9. The antenna system according to any one of claims 1 to 5, characterized in that: When the switch device connects the third antenna to the third radio frequency circuit; when the third radio frequency circuit is a radio frequency transmitting circuit, the first antenna and the third antenna transmit signals, and the second antenna receives signals.

10. The antenna system according to any one of claims 1 to 9, characterized in that: The antenna system further comprises a control unit; the control unit is used for controlling the switch device.

11. An electronic device, characterized in that: Comprising the antenna system according to any one of claims 1-10.

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