An antenna system

Abstract

The embodiment of the application provides an antenna system, relates to the technical field of terminals, and solves the problems of device customization difficulty, antenna cost and area limitation under the combination of LB+LB and 4*4 MIMO of a 5G terminal device. The specific scheme is as follows: a first tunable phase-shifting circuit is used for adjusting the frequency when a first antenna receives a signal, so as to receive a first double-frequency signal from the first antenna; a first tunable power divider is used for adjusting the frequency of a radio frequency channel between the first antenna and an integrated module; the first double-frequency signal received from the first tunable phase-shifting circuit is separated into a first frequency signal and a second frequency signal and transmitted to the first antenna integrated module; the first antenna integrated module is used for combining the two signals into a second double-frequency signal through a radio frequency integrated module first tunable filter; and the first tunable filter is used for outputting the second double-frequency signal on different radio frequency channels according to the frequency. The embodiment of the application is used for terminal device downlink reception control.

Description

TECHNICAL FIELD

[0001] Embodiments of the present application relate to the technical field of terminals, and in particular to an antenna system. BACKGROUND

[0002] With the development of 5th generation mobile networks (5G) communication and 5G terminal devices, the non-standalone network mode of Long Term Evolution (LTE) and 5G New Radio (NR) NR dual connectivity is developing rapidly. Operators have strong demand for 5G terminal devices to support low frequency (LB) + LB (such as B20 + n28A) dual bands, and hope that LB can support 4*4 multiple input multiple output (MIMO) combination to improve the downlink rate of 5G terminal devices.

[0003] At present, in an existing technology, a multi-functional device is used to realize signal synthesis method evaluation to realize 4*4 MIMO combination of LB1 + LB2 (B20 + N28A) or LB3 + LB2 (B8 + N28A). For example, an antenna is combined with multiple duplexers, or multiple triplexers, or multiple quadplexers, and Dual saw or filter (Trisaw), etc., to realize 4*4 MIMO combination of LB1 + LB2 or LB3 + LB2, etc., transmitter-receiver (TRX) of main set reception and transmission, MIMO primary reception (PRX) of B8 + N28A & B20 + N28A, diversity reception (DRX) and MIMO DRX of B8 + N28A & B20 + N28A. However, to support LB + LB and 4*4 MIMO combination under this method, multiple duplexers / triplexers / quadplexers and Dual saw / Trisaw devices are required, which increases the difficulty of device customization, and increases the cost and area of the antenna. SUMMARY

[0004] Embodiments of the present application provide an antenna system, which solves the problems of device customization difficulty, antenna cost and area limitation under LB + LB and 4*4 MIMO combination of 5G terminal devices.

[0005] To achieve the above-mentioned purpose, embodiments of the present application adopt the following technical solutions:

[0006] In a first aspect, an antenna system is provided, which comprises a first antenna integrated module, a first radio frequency integrated module, a first antenna, a first tunable phase-shifting circuit coupled with the first antenna, a first tunable power divider, and a first tunable filter; when the first antenna receives a signal:

[0007] The first tunable phase-shifting circuit is configured to adjust the frequency of the signal received by the first antenna, so as to receive a first dual-frequency signal from the first antenna and send the first dual-frequency signal to the first tunable power divider; the first tunable power divider is configured to adjust the frequency of a radio frequency channel between the first tunable power divider and the first antenna integrated module; according to the frequency of the radio frequency channel between the first tunable power divider and the first antenna integrated module, the first tunable power divider separates the first dual-frequency signal received from the first tunable phase-shifting circuit into a first frequency signal and a second frequency signal, and transmits the first frequency signal and the second frequency signal to the first antenna integrated module; the first antenna integrated module is configured to demodulate the first frequency signal and the second frequency signal received from the first tunable power divider, combine the two demodulated signals into a second dual-frequency signal, and send the second dual-frequency signal to the first radio frequency integrated module; the first radio frequency integrated module is configured to send the second dual-frequency signal; and the first tunable filter is configured to receive the second dual-frequency signal and distribute the second dual-frequency signal on different radio frequency channels according to the frequency.

[0008] Thus, in the case where the antenna system comprises the first tunable phase-shifting circuit, the first tunable power divider, and the first tunable filter, the frequency adjustment of the signal received by the first antenna, the distribution of the adjusted frequency on the radio frequency channel, and the distribution of signals of different frequencies on the radio frequency channel can be realized through the tunable circuit. In this way, the frequencies of the antenna end and the radio frequency end can be kept consistent, and precise frequency and matching control from the antenna end to the radio frequency end can be realized. In addition, the use of the tunable circuit in the system combining dual-frequency and MIMO can avoid the use of a large number of complex LB+LB MIMO combinations in the prior art, and the number of devices of the tunable circuit of the present application is small, and the PCB area occupied is small.

[0009] In a possible design, when the first antenna is the main antenna, the antenna system further includes a second tunable power divider coupled with the main antenna; when the main antenna is used to receive signals, the first RF integrated module is configured to send the second dual-frequency signal to the second tunable power divider; the second tunable power divider is configured to receive the second dual-frequency signal sent by the first RF integrated module, and send the second dual-frequency signal to the first tunable filter; and the first tunable filter is configured to receive the second dual-frequency signal sent by the second tunable power divider. That is, when the first antenna is the main antenna, the second tunable power divider can receive the second dual-frequency signal sent by the first RF integrated module, where the second dual-frequency signal is transmitted to the second tunable power divider on one RF channel. The second tunable power divider can directly send the second dual-frequency signal to the first tunable filter, so that the first tunable filter performs signal distribution on the second dual-frequency signal.

[0010] In a possible design, when the first antenna is the main antenna, and the main antenna is used to transmit signals, the antenna system further includes a second tunable power divider coupled with the main antenna; the first RF integrated module is configured to send the second dual-frequency signal to the second tunable power divider; the second tunable power divider is configured to receive the second dual-frequency signal sent by the first RF integrated module, and send the second dual-frequency signal to the first tunable filter; and the first tunable filter is configured to receive the second dual-frequency signal sent by the second tunable power divider.

[0011] The second tunable power divider is further configured to combine two signals received from different RF channels into a third dual-frequency signal, and send the third dual-frequency signal to the first RF integrated module; the first RF integrated module is configured to send the third dual-frequency signal to the first antenna integrated module; the first antenna integrated module is further configured to demodulate the third dual-frequency signal received from the first RF integrated module, and separate the third dual-frequency signal into a third frequency signal and a fourth frequency signal according to frequencies of the RF channels between the first tunable power divider and the first antenna integrated module, and send the third frequency signal and the fourth frequency signal to the first tunable power divider; the first tunable power divider is further configured to adjust the frequencies of the RF channels between the first tunable power divider and the first antenna integrated module; and the first tunable power divider is further configured to combine the third frequency signal and the fourth frequency signal received from the first antenna integrated module into a fourth dual-frequency signal, and send the fourth dual-frequency signal to the first tunable phase shift circuit; and the first tunable phase shift circuit is further configured to adjust the frequency of the main antenna, so as to transmit the fourth dual-frequency signal received from the first tunable power divider through the main antenna.

[0012] That is, when the first antenna transmits signals, the second tunable power divider at the radio frequency end can perform signal synthesis on signals received from radio frequency channels of different frequencies, so as to send the synthesized signals to the first antenna integrated module through the radio frequency integrated module. The first antenna integrated module can further distribute the synthesized signals sent from the radio frequency end, and the distribution is based on the frequency of the radio frequency channel between the first tunable power divider and the antenna integrated module adjusted by the first tunable power divider, that is, the synthesized signals are sent to the first tunable power divider according to the frequency of different radio frequency channels, so as to realize accurate frequency control and matching control from the radio frequency end to the antenna end. The first tunable phase-shifting circuit can also tune the frequency of the main set antenna, so that the main set antenna can transmit the dual-frequency signals received from the radio frequency end according to the tuned frequency.

[0013] In a possible design, when the first antenna is a main set antenna, the antenna system further includes a second antenna, a second tunable phase-shifting circuit coupled with the second antenna, a third tunable power divider, and a second tunable filter; the second antenna is a diversity antenna, and when the diversity antenna is used to receive signals:

[0014] The second tunable phase-shifting circuit is configured to adjust the frequency when the diversity antenna receives signals, so as to receive a fifth dual-frequency signal from the diversity antenna and send the fifth dual-frequency signal to the third tunable power divider; the third tunable power divider is configured to adjust the frequency of the radio frequency channel between the third tunable power divider and the first antenna integrated module; the fifth dual-frequency signal received from the second tunable phase-shifting circuit is separated into a fifth frequency signal and a sixth frequency signal according to the frequency of the radio frequency channel between the third tunable power divider and the first antenna integrated module, and the fifth frequency signal and the sixth frequency signal are transmitted to the first antenna integrated module; the first antenna integrated module is configured to demodulate the fifth frequency signal and the sixth frequency signal received from the third tunable power divider, synthesize the two demodulated signals into a sixth dual-frequency signal, and send the sixth dual-frequency signal to the first radio frequency integrated module; the first radio frequency integrated module is configured to send the sixth dual-frequency signal to the second tunable filter; and the second tunable filter is configured to receive the sixth dual-frequency signal from the first radio frequency integrated module and distribute the sixth dual-frequency signal on different radio frequency channels according to the frequency. Similar to the case that the first antenna is a main set antenna, the diversity antenna of the present application can also realize accurate frequency control and frequency matching from the radio frequency end to the antenna end through the tunable circuit at the radio frequency end and the tunable circuit at the antenna end. Moreover, the present application can reduce the number of antennas, multiplexers, and multi-frequency filters in the case of multiple complex LB+LB 4*4 MIMO combinations, and only needs to couple corresponding tunable circuits to the main set antenna and the diversity antenna.

[0015] In a possible design, the antenna system further includes a second antenna integration module, a second radio frequency integration module, a first multiple-input multiple-output (MIMO) antenna, and a second MIMO antenna; a third tunable phase-shifting circuit, a fourth tunable power divider, and a third tunable filter coupled with the first MIMO antenna; a fourth tunable phase-shifting circuit, a fifth tunable power divider, and a fourth tunable filter coupled with the second MIMO antenna; and the first MIMO antenna is configured to receive a signal, and the third tunable phase-shifting circuit is configured to adjust a frequency of the signal received by the first MIMO antenna, to receive a seventh dual-frequency signal from the first MIMO antenna, and to send the seventh dual-frequency signal to the fourth tunable power divider.

[0016] The third tunable phase-shifting circuit is configured to adjust the frequency of the signal received by the first MIMO antenna, to receive a seventh dual-frequency signal from the first MIMO antenna, and to send the seventh dual-frequency signal to the fourth tunable power divider; the fourth tunable power divider is configured to adjust a frequency of a radio frequency channel between the fourth tunable power divider and the second antenna integration module; the fourth tunable power divider is configured to separate the seventh dual-frequency signal received from the fourth tunable phase-shifting circuit into a seventh frequency signal and an eighth frequency signal according to the frequency of the radio frequency channel between the fourth tunable power divider and the second antenna integration module, and to transmit the seventh frequency signal and the eighth frequency signal to the second antenna integration module; the second antenna integration module is configured to demodulate the seventh frequency signal and the eighth frequency signal received from the fourth tunable power divider, to combine the two demodulated signals into an eighth dual-frequency signal, and to send the eighth dual-frequency signal to the second radio frequency integration module; the second radio frequency integration module is configured to send the eighth dual-frequency signal to the third tunable filter; and the third tunable filter is configured to receive the eighth dual-frequency signal from the second radio frequency integration module, and to distribute the eighth dual-frequency signal on different radio frequency channels according to the frequency.

[0017] The second MIMO antenna is configured to receive a signal, and the fourth tunable phase-shifting circuit is configured to adjust a frequency of the signal received by the second MIMO antenna, to receive a ninth dual-frequency signal from the second MIMO antenna, and to send the ninth dual-frequency signal to the fifth tunable power divider.

[0018] The fourth tunable phase-shifting circuit is configured to adjust the frequency of the signal received by the second MIMO antenna, to receive a ninth dual-frequency signal from the second MIMO antenna, and to send the ninth dual-frequency signal to the fifth tunable power divider; the fifth tunable power divider is configured to adjust a frequency of a radio frequency channel between the fifth tunable power divider and the second antenna integration module; the fifth tunable power divider is configured to separate the ninth dual-frequency signal received from the fourth tunable phase-shifting circuit into a ninth frequency signal and a tenth frequency signal according to the frequency of the radio frequency channel between the fifth tunable power divider and the second antenna integration module, and to transmit the ninth frequency signal and the tenth frequency signal to the second antenna integration module; the second antenna integration module is configured to demodulate the ninth frequency signal and the tenth frequency signal received from the fourth tunable power divider, to combine the two demodulated signals into a tenth dual-frequency signal, and to send the tenth dual-frequency signal to the second radio frequency integration module; the second radio frequency integration module is configured to send the tenth dual-frequency signal to the third tunable filter; and the fourth tunable filter is configured to receive the tenth dual-frequency signal from the second radio frequency integration module, and to distribute the tenth dual-frequency signal on different radio frequency channels according to the frequency.

[0019] In combination with the above-mentioned main diversity antenna, diversity antenna, and first MIMO antenna and second MIMO antenna in the present design, the present application can realize frequency control and frequency matching under LB+LB combined with MIMO. That is, similar to the main diversity antenna and the diversity antenna, the tunable circuit coupled with the radio frequency end of the first MIMO antenna and the tunable circuit of the antenna end can realize precise frequency control and frequency matching of the radio frequency end and the antenna end of the first MIMO antenna. Similar to the first MIMO antenna, the tunable circuit coupled with the radio frequency end of the second MIMO antenna and the tunable circuit of the antenna end can realize precise frequency control and frequency matching of the radio frequency end and the antenna end of the second MIMO antenna. Moreover, the present application can reduce the number of antennas and multiplexers, multi-frequency filters under various complex LB+LB 4*4 MIMO combinations, and only needs to couple the corresponding tunable circuits of the main diversity antenna, diversity antenna, first MIMO antenna, and second MIMO antenna, thereby reducing the area occupation of the single board.

[0020] In a possible design, the first tunable phase-shifting circuit includes: a first variable capacitor group connected with the open end of the radiation patch of the first antenna; the first variable capacitor group is used to adjust the double frequency when the first antenna receives a signal and the frequency when the first antenna transmits a signal. In this way, by adjusting the capacitance value of the first variable capacitor group, the tuning frequency of a single antenna, such as the main diversity antenna, can be expanded to LB1+LB2+LB3…, so that the single antenna can process signals of multiple frequency bands through the tunable phase-shifting circuit. Similarly, the implementation principles of the second tunable phase-shifting circuit corresponding to the diversity antenna, the third tunable phase-shifting circuit corresponding to the first MIMO antenna, and the fourth tunable phase-shifting circuit corresponding to the second MIMO antenna can be referred to the principle of the first tunable phase-shifting circuit to realize frequency adjustment of the diversity antenna, the first MIMO antenna, and the second MIMO antenna.

[0021] In a possible design, the first tunable power divider includes: a multi-path power divider, each path of the multi-path power divider including a microstrip transmission line, a second variable capacitor set and a DC bias circuit connected to the microstrip transmission line; each microstrip transmission line corresponds to an RF channel; the second variable capacitor set and the DC bias circuit are used to adjust the frequency of the microstrip transmission line; a plurality of first tunable impedances, each first tunable impedance of the plurality of first tunable impedances being connected between adjacent microstrip transmission lines, and used to perform port isolation between the adjacent microstrip transmission lines. That is, the tunable power divider can perform LB+LB signal frequency distribution, that is, through the first tunable power divider, a plurality of frequency signals of a single antenna (a main diversity antenna) can be tuned to different microstrip transmission lines, for example, LB1 TRX is tuned to be transmitted on one microstrip transmission line, and LB2 TRX is tuned to be transmitted on another microstrip transmission line, to implement LB+LB signal frequency distribution. In addition, the application can also perform port isolation between the transmission lines through the first tunable impedance, to reduce interference between the microstrip transmission lines. Similarly, the implementation of the second tunable power divider coupled with the main diversity antenna, the third tunable power divider coupled with the diversity antenna, the fourth tunable power divider coupled with the first MIMO antenna, and the fifth tunable power divider coupled with the second MIMO antenna can be referred to the implementation of the first tunable power divider.

[0022] In a possible design, the first tunable power divider is connected with a coupler and a plurality of second tunable impedances between the antenna integration module, and used to perform antenna isolation between the main diversity antenna and other antennas. The coupler and the second tunable impedance herein can be understood as being used to improve PRX and DRX; MIMO antenna PRX and DRX; isolation between the main diversity antenna, the diversity antenna and the MIMO antenna, and reduce interference when signals are transmitted between RF channels of different antennas.

[0023] In a second aspect, a frequency control method is provided, and is applied to an antenna system. The antenna system includes a first antenna integration module, a first RF integration module, a first antenna, a first tunable phase shift circuit coupled with the first antenna, a first tunable power divider, and a first tunable filter. When the first antenna is used to receive a signal, the method includes the following steps.

[0024] The first tunable phase-shifting circuit is controlled to adjust the frequency of the first antenna in receiving the signal, so as to receive the first dual-frequency signal from the first antenna; the first tunable phase-shifting circuit is controlled to send the first dual-frequency signal to the first tunable power divider; the first tunable power divider is controlled to adjust the frequency of the radio frequency channel between the first tunable power divider and the first antenna integrated module, and according to the frequency of the radio frequency channel between the first tunable power divider and the first antenna integrated module, the first tunable power divider is controlled to separate the first dual-frequency signal into the first frequency signal and the second frequency signal, and transmit the first frequency signal and the second frequency signal to the first antenna integrated module; the first antenna integrated module is controlled to demodulate the first frequency signal and the second frequency signal, combine the two demodulated signals into a second dual-frequency signal, and send the second dual-frequency signal to the first radio frequency integrated module; the first radio frequency integrated module is controlled to send the second dual-frequency signal; and the first tunable filter is controlled to receive the second dual-frequency signal and distribute the second dual-frequency signal on different radio frequency channels according to the frequency.

[0025] The beneficial effects of the second aspect can be referred to the description of the beneficial effects of the first aspect.

[0026] In a possible design, when the first antenna is a main antenna, the antenna system further includes a second tunable power divider coupled with the main antenna; and when the main antenna is used to receive the signal, the control of the first radio frequency integrated module to send the second dual-frequency signal to the first tunable filter includes: control of the first radio frequency integrated module to send the second dual-frequency signal to the second tunable power divider; and control of the second tunable power divider to output the second dual-frequency signal to the first tunable filter.

[0027] In a possible design, when the first antenna is a main antenna, and when the main antenna is used to transmit the signal, the method further includes: control of the second tunable power divider to combine two signals received from radio frequency channels of different frequencies into a third dual-frequency signal, and send the third dual-frequency signal to the first radio frequency integrated module; control of the first radio frequency integrated module to send the third dual-frequency signal to the first antenna integrated module; control of the first antenna integrated module to demodulate the third dual-frequency signal, and according to the frequency of the radio frequency channel between the first tunable power divider and the first antenna integrated module, separate the third dual-frequency signal into a third frequency signal and a fourth frequency signal, and send the third frequency signal and the fourth frequency signal to the first tunable power divider; control of the first tunable power divider to adjust the frequency of the radio frequency channel between the first tunable power divider and the first antenna integrated module; combination of the received third frequency signal and fourth frequency signal into a fourth dual-frequency signal, and sending of the fourth dual-frequency signal to the first tunable phase-shifting circuit; and control of the first tunable phase-shifting circuit to adjust the frequency of the main antenna, and control of the first tunable phase-shifting circuit to send the fourth dual-frequency signal to the main antenna, so as to control the main antenna to transmit the fourth dual-frequency signal.

[0028] In a possible design, when the first antenna is a main set antenna, the antenna system further includes a second antenna, a second tunable phase-shifting circuit coupled with the second antenna, a third tunable power divider, and a second tunable filter; the second antenna is a diversity antenna, and when the diversity antenna is used to receive a signal, the method further includes: controlling the second tunable phase-shifting circuit to adjust a frequency at which the diversity antenna receives the signal, so as to receive a fifth dual-frequency signal from the diversity antenna and send the fifth dual-frequency signal to the third tunable power divider; controlling the third tunable power divider to adjust a frequency of a radio frequency channel between the third tunable power divider and the first antenna integrated module; controlling the third tunable power divider to separate, according to the frequency of the radio frequency channel between the third tunable power divider and the first antenna integrated module, the fifth dual-frequency signal received from the second tunable phase-shifting circuit into a fifth frequency signal and a sixth frequency signal, and to transmit the fifth frequency signal and the sixth frequency signal to the first antenna integrated module; controlling the first antenna integrated module to demodulate the fifth frequency signal and the sixth frequency signal received from the third tunable power divider, combine the two demodulated signals into a sixth dual-frequency signal, and send the sixth dual-frequency signal to the first radio frequency integrated module; controlling the first radio frequency integrated module to send the sixth dual-frequency signal to the second tunable filter; and controlling the second tunable filter to receive the sixth dual-frequency signal from the first radio frequency integrated module and distribute the sixth dual-frequency signal on different radio frequency channels according to the frequency.

[0029] In a possible design, the antenna system further includes a second antenna integrated module, a second radio frequency integrated module, a first MIMO antenna, and a second MIMO antenna; a third tunable phase-shifting circuit, a fourth tunable power divider, and a third tunable filter coupled with the first MIMO antenna; a fourth tunable phase-shifting circuit, a fifth tunable power divider, and a fourth tunable filter coupled with the second MIMO antenna;

[0030] When the first MIMO antenna is used to receive signals, the method further comprises: controlling the third tunable phase-shifting circuit to adjust the frequency when the first MIMO antenna receives signals, so as to receive a seventh dual-frequency signal from the first MIMO antenna and send the seventh dual-frequency signal to the fourth tunable power divider; controlling the fourth tunable power divider to adjust the frequency of the radio frequency channel between the fourth tunable power divider and the second antenna integrated module; controlling the fourth tunable power divider to separate the seventh dual-frequency signal received from the fourth tunable phase-shifting circuit into a seventh frequency signal and an eighth frequency signal according to the frequency of the radio frequency channel between the second antenna integrated module, and transmit the seventh frequency signal and the eighth frequency signal to the second antenna integrated module; controlling the second antenna integrated module to demodulate the seventh frequency signal and the eighth frequency signal received from the fourth tunable power divider, combine the two demodulated signals into an eighth dual-frequency signal, and send the eighth dual-frequency signal to the second radio frequency integrated module; controlling the second radio frequency integrated module to send the eighth dual-frequency signal to the third tunable filter; and controlling the third tunable filter to receive the eighth dual-frequency signal from the second radio frequency integrated module and distribute the eighth dual-frequency signal on different radio frequency channels according to the frequency.

[0031] When the second MIMO antenna is used to receive signals, the method further comprises: controlling the fourth tunable phase-shifting circuit to adjust the frequency when the second MIMO antenna receives signals, so as to receive a ninth dual-frequency signal from the second MIMO antenna and send the ninth dual-frequency signal to the fifth tunable power divider; controlling the fifth tunable power divider to adjust the frequency of the radio frequency channel between the fifth tunable power divider and the second antenna integrated module; separating the ninth dual-frequency signal received from the fourth tunable phase-shifting circuit into a ninth frequency signal and a tenth frequency signal according to the frequency of the radio frequency channel between the second antenna integrated module, and transmitting the ninth frequency signal and the tenth frequency signal to the second antenna integrated module; controlling the second antenna integrated module to demodulate the ninth frequency signal and the tenth frequency signal received from the fourth tunable power divider, combine the two demodulated signals into a tenth dual-frequency signal, and send the tenth dual-frequency signal to the second radio frequency integrated module; controlling the second radio frequency integrated module to send the tenth dual-frequency signal to the third tunable filter; and controlling the fourth tunable filter to receive the tenth dual-frequency signal from the second radio frequency integrated module and distribute the tenth dual-frequency signal on different radio frequency channels according to the frequency.

[0032] In a possible design, the controlling the first tunable phase-shifting circuit to adjust the frequency when the first antenna receives signals comprises: controlling a first variable capacitor group in the first tunable phase-shifting circuit to adjust the frequency when the first antenna receives signals, the first variable capacitor group being connected to an open end of a radiating patch of the first antenna.

[0033] In a possible design, the first tunable power divider includes: a plurality of power dividers, each of the plurality of power dividers including a microstrip transmission line, a second variable capacitor set connected to the microstrip transmission line, and a direct current bias circuit; each microstrip transmission line corresponds to one radio frequency channel; a plurality of first tunable impedances, each of the plurality of first tunable impedances being connected between adjacent microstrip transmission lines; and the method of controlling the first tunable power divider to adjust the frequency of the radio frequency channel between the first tunable power divider and the antenna integration module includes: adjusting the frequency of the microstrip transmission line by the second variable capacitor set connected to the microstrip transmission line and the direct current bias circuit included in each power divider; and performing port isolation on the adjacent microstrip transmission lines by the plurality of first tunable impedances.

[0034] In a possible design, a coupler and a plurality of second tunable impedances are connected between the first tunable power divider and the antenna integration module, to perform inter-antenna isolation on the first antenna and other antennas.

[0035] In a third aspect, an antenna system is provided, including the first aspect and any possible design of the first aspect.

[0036] In a fourth aspect, a chip is provided, which is coupled with a memory, and is configured to read and execute program instructions stored in the memory, to implement the method in the second aspect or any possible design of the second aspect.

[0037] In a fifth aspect, a computer readable storage medium is provided, including computer instructions, which, when running on an electronic device, cause the electronic device to perform the method in the second aspect or any possible design of the second aspect.

[0038] In a sixth aspect, a computer program product is provided, which, when running on a computer, causes an electronic device to perform the method in the second aspect or any possible design of the second aspect. BRIEF DESCRIPTION OF DRAWINGS

[0039] Figure 1 A circuit schematic diagram for implementing signal synthesis by an antenna array is provided for an embodiment of the present application;

[0040] Figure 2 A circuit schematic diagram for implementing signal synthesis by an antenna array is provided for an embodiment of the present application;

[0041] Figure 3 An antenna system schematic diagram is provided for an embodiment of the present application;

[0042] Figure 4A An antenna system schematic diagram is provided for an embodiment of the present application;

[0043] Figure 4B A schematic diagram of an antenna system provided for an embodiment of the present application is shown in FIG. 1.

[0044] Figure 4C A schematic diagram of an antenna system provided for an embodiment of the present application is shown in FIG. 1.

[0045] Figure 4D A schematic diagram of an antenna system provided for an embodiment of the present application is shown in FIG. 1.

[0046] Figure 5 A flowchart of a frequency control method provided for an embodiment of the present application is shown in FIG. 1.

[0047] Figure 6 A schematic diagram of a control flow of a signal control module provided for an embodiment of the present application is shown in FIG. 1.

[0048] Figure 7 A schematic diagram of a circuit structure of a first tunable power divider provided for an embodiment of the present application is shown in FIG. 1.

[0049] Figure 8 A schematic diagram of a circuit structure of a coupler and a plurality of second tunable impedances provided for an embodiment of the present application is shown in FIG. 1.

[0050] Figure 9 A schematic diagram of a structure of a radio frequency device provided for an embodiment of the present application is shown in FIG. 1.

[0051] Figure 10 A schematic diagram of a structure of a communication device provided for an embodiment of the present application is shown in FIG. 1.

[0052] Figure 11 A schematic diagram of a structure of a terminal device provided for an embodiment of the present application is shown in FIG. 1. DETAILED DESCRIPTION

[0053] For the convenience of understanding, some explanations of concepts related to embodiments of the present application are given as examples for reference. As shown below:

[0054] LB+LB: low frequency mode supported by a terminal device under LTE and NR dual connectivity, for example, LB+LB supported by a 5G mobile phone can be B20+N28A, B8+N28A, and the like, and various LB+LB combinations of 8 / 20 / 28A…

[0055] MIMO antenna: an antenna system in which multiple antennas are used at the transmitting end and the receiving end to form multiple channels between the transceiver.

[0056] Main set antenna: responsible for signal transmission and reception.

[0057] Diversity antenna: responsible for receiving signals, not responsible for transmitting signals.

[0058] TRX: signals received and transmitted by the main set antenna, which can include transmitted TX signals and main set received PRX signals;

[0059] DRX: signals received by the diversity antenna.

[0060] PRX: signals received by the main set antenna.

[0061] Currently, there is no product and solution in the industry that supports LB+LB and m*m MIMO, such as 4*4 MIMO. Currently, in one technology, a multi-functional device is used to implement a signal synthesis method to evaluate a 4*4 MIMO scheme of LB1+LB2 (B20+N28A) and LB3+LB2 (B8+N28A) as shown in Figure 1 , where N28A is a number in the 5G frequency band, and B8 and B20 are both numbers in the 4G frequency band. Figure 1 The diagram shows the current existing signal synthesis scheme implemented by a multi-functional device, which includes an antenna (ANT), an antenna integrated module (ANT integrated module), a radio frequency integrated module (Radio Frequency integrated module), a multiplexer, a frequency division filter (TriSAW), etc. See Figure 1 It can be understood that ANT1 and ANT2 combine the multiplexer to implement LB1+LB2 and LB3+LB2 TRX, ANT3 combines a TriSAW to implement LB3+LB2 & LB1+LB2 MIMO PRX, ANT4, ANT5 and ANT6 combine two Trisaws to implement LB3+LB2 & LB1+LB2 DRX and MIMO DRX, respectively.

[0062] It can be understood that in this technology, to support LB+LB and 4*4 MIMO combination, multiple duplexers / triplexers / quadruplexers, multiplexers, TriSAWs, etc. are needed, which increases the difficulty of device customization, and also increases the antenna cost and area; the number of LB+LB combination and LB MIMO determines the number of antennas, the more combinations, the more antennas, the larger the antenna cost and area.

[0063] In another technology, an antenna array is used to implement a signal synthesis scheme as shown in Figure 2As shown, including antenna integration module, radio frequency integrated module, diplexer, diversity module and switch module. Through the antenna ANT1, ANT2 and ANT3 realize LB1 (B20), LB3 (B8) and LB2 (N28A) TRX, ANT4 realizes LB1 (B20), LB3 (B8) and LB2 (N28A) DRX. ANT5, ANT6 and ANT7 respectively realize LB1 (B20), LB3 (B8) and LB2 (N28A) MIMO PRX and DRX. However, in this technology, similarly, LB and LB combination and LB MIMO are directly related to the number of antennas, the combination increases, the number of antennas also increases, resulting in the decline of antenna efficiency, and the difficulty of implementation.

[0064] Therefore, the present application aims at the problem that the rapid development of 5G communication leads to the contradiction between the LB+LB and 4*4 MIMO combination requirements of 5G terminal equipment of each operator and the device customization difficulty, antenna cost and area limitation in the prior art, and the problem of how to realize the isolation between LB and LB signals due to the very close frequency bands of LB+LB, proposes an antenna system, which uses tunable phase shift circuit and tunable circuit (such as tunable power divider and tunable filter) etc., by changing the loading voltage signal of the tunable frequency shift phase circuit and the tunable circuit, the capacitance group value of the LB+LB combination antenna tunable phase shift circuit, tunable power divider and tunable filter can be changed at the same time, so as to cooperatively control the frequency, LB+LB MIMO signal combination and impedance matching of the antenna end and the radio frequency end, realize the precise frequency and matching control from the antenna end to the radio frequency end.

[0065] The embodiment of the present application is used in the combination and distribution scene of LB+LB signal in the antenna system.

[0066] The scenario can be applied to a terminal device supporting LB+LB dual frequency, for example, the terminal device can support LB+LB dual frequency under LTE and NR dual connectivity, that is, the antenna of the terminal device can transmit signals of dual frequency. The terminal device can be a user equipment (UE), an access terminal, a subscriber unit, a subscriber station, a mobile station, a mobile, a remote station, a remote terminal, a mobile device, a user terminal, a terminal, a wireless communication device, a user agent, or a user apparatus. The terminal device in the embodiments of the present application can be a mobile phone, a tablet computer, a computer with wireless transceiver function, a virtual reality (VR) terminal device, an augmented reality (AR) terminal device, a wireless terminal in industrial control, a wireless terminal in self-driving, a wireless terminal in remote medical treatment, a wireless terminal in smart grid, a wireless terminal in transportation safety, a wireless terminal in smart city, a wireless terminal in smart home, a terminal device in a 5G network, or a terminal device in a future evolved public land mobile network (PLMN), and the like. The embodiments of the present application do not limit the application scenarios. The methods and steps implemented by the terminal device in the present application can also be implemented by components (such as chips or circuits) that can be used for the terminal device. The terminal device and the components (such as chips or circuits) that can be provided in the terminal device in the present application are collectively referred to as terminal devices.

[0067] In the antenna system of the terminal device, the present application improves the hardware circuit between the antenna and the antenna integration module, and the hardware circuit connected with the radio frequency integration module, as shown in Figure 3 The antenna tuning module 301 is added to the circuit between the antenna and the antenna integration module, the radio frequency tuning module 302 is added to the circuit connected with the radio frequency integration module, and the antenna tuning module 301 and the radio frequency tuning module 302 are controlled by the signal control module 303 implemented by software, so as to realize accurate frequency and matching control from the antenna end to the radio frequency end.

[0068] The antenna tuning module 301 of the present application is implemented by using a tunable phase shift circuit system and a tunable power divider of LB+LB and MIMO. Specifically, the tunable phase shift circuit of the present application is used to control the antenna beam forming. The phase shifter can be implemented by using a phase shifter device or a self-made phase shifter. Specifically, a variable capacitor group can be added at the open end of the antenna radiation patch to expand the tuning frequency of a single antenna in LB1+LB2+LB3…; for the main set antenna, the diversity antenna and the MIMO antenna, the tunable power divider is used for frequency distribution of LB+LB signals.

[0069] In addition, the present application uses a coupler and an odd-even mode method at the signal output end of the tunable power divider to improve the isolation between PRX and DRX, MIMO antenna PRX and DRX, main set antenna, diversity antenna and MIMO antenna.

[0070] The present application can also add a variable capacitor group at the short-circuit end of the antenna radiation patch for impedance matching adjustment.

[0071] The present application can also add an integrated module to the antenna integration module, for example, a switch module, which is used to realize signal combination switching of the antenna tuning module 301 to the radio frequency tuning module 302.

[0072] The radio frequency tuning module 302 of the present application can use a tunable power divider and a tunable filter group to realize signal distribution of LB1+LB2+…TRX / DRX and MIMO PRX / DRX.

[0073] The signal control module 303 of the present application can be used to control the frequency of LB+LB of the antenna tuning module 301 and the radio frequency tuning module 302 to be consistent. For example, the capacitance C of the variable capacitor group has a nonlinear relationship with the loading voltage V. The signal control module 303 can change the loading voltage signal of the variable capacitor group, which can simultaneously change the capacitance value of the variable capacitor group of the LB+LB combination antenna tuning module 301 and the radio frequency tuning module 302, so as to cooperatively control the frequency and impedance matching of the antenna tuning module 301 and the radio frequency tuning module 302, and realize accurate frequency and matching control from the antenna end to the radio frequency end.

[0074] Taking the LB+LB combination combined with 4*4 MIMO as an example, for the first antenna (which can be a main set antenna, a diversity antenna or a MIMO antenna) in the four antennas, as shown in the antenna system 40, Figure 4A when the circuit coupled with the first antenna includes a first tunable phase shift circuit, a first tunable power divider and a first tunable filter, and when the first antenna is used to receive signals:

[0075] The first tunable phase-shifting circuit is configured to adjust the frequency of the signal received by the first antenna to obtain the first dual-frequency signal from the first antenna and send the first dual-frequency signal to the first tunable power divider. For example, the first tunable phase-shifting circuit connected to the first antenna is configured to adjust the frequency of the first antenna to LB1+LB2, so that the first antenna can receive the first dual-frequency signal with the frequency of LB1+LB2, the first tunable phase-shifting circuit can receive the first dual-frequency signal with the frequency of LB1+LB2 from the first antenna, and send the first dual-frequency signal with the frequency of LB1+LB2 to the first tunable power divider. For example, when the first antenna is a main set antenna, the first dual-frequency signal can be LB1+LB2 PRX.

[0076] The first tunable power divider is configured to adjust the frequency of the radio frequency channel between the first tunable power divider and the first antenna integrated module. For example, the frequency of one radio frequency channel between the first tunable power divider and the first antenna integrated module is adjusted to LB1, and the frequency of another radio frequency channel between the first tunable power divider and the first antenna integrated module is adjusted to LB2.

[0077] The first tunable power divider is configured to separate the first dual-frequency signal received from the first tunable phase-shifting circuit into a first frequency signal and a second frequency signal according to the frequency of the radio frequency channel between the first tunable power divider and the first antenna integrated module, and transmit the first frequency signal and the second frequency signal to the first antenna integrated module. For example, according to the above example, the first tunable power divider can separate LB1 PRX+LB2 PRX received from the first antenna into a first frequency signal LB1 PRX and a second frequency signal PB2 PRX according to the frequencies LB1 and LB2 of different radio frequency channels between the antenna integrated module;

[0078] The first antenna integrated module is configured to demodulate the first frequency signal and the second frequency signal received from the first tunable power divider, combine the two demodulated signals into a second dual-frequency signal, and send the second dual-frequency signal to the radio frequency integrated module. For example, according to the above example, the first antenna integrated module can be provided with a switch module, which can output the first frequency signal LB1 PRX and the second frequency signal PB2 PRX received from the first tunable power divider among a plurality of tunable power dividers to the first radio frequency integrated module on one radio frequency channel, i.e. the first antenna integrated module can not output the signals of other tunable power dividers when outputting the output signal of the first tunable power divider, so as to send the second dual-frequency signal LB1 PRX+LB2 PRX to the first radio frequency integrated module through one radio frequency channel.

[0079] The first radio frequency integrated module is configured to transmit the second dual frequency signal; for example, the first radio frequency integrated module transmits the second dual frequency signal LB1 PRX+LB2 PRX to the first tunable filter through the intermediate coupling circuit;

[0080] The first tunable filter is configured to receive the second dual frequency signal and distribute the second dual frequency signal on different radio frequency channels according to the frequency; for example, the first tunable filter is configured to output the received second dual frequency signal LB1 PRX+LB2 PRX on different radio frequency channels according to the frequencies of LB1 and LB2, one radio frequency channel outputs LB1 PRX, and the other radio frequency channel outputs LB2 PRX. For example, LB1 PRX and LB2 PRX output by the first tunable filter can be output to a processor connected to the antenna system for further processing.

[0081] Reference Figure 4A The circuit structure of the first antenna in the antenna system can include:

[0082] One end a of the first antenna is coupled to a first end b of the first tunable phase-shifting circuit, a second end c of the first tunable phase-shifting circuit is coupled to a first end d of the first tunable power divider, a second end e of the first tunable power divider is coupled to a first end f of the first antenna integrated module; a third end p of the first tunable power divider is coupled to a second end m of the first antenna integrated module.

[0083] A third end g of the first antenna integrated module is coupled to a first end h of the first radio frequency integrated module; a second end i of the first radio frequency integrated module is coupled to a first end j of the first tunable filter.

[0084] In this way, for the first antenna in the antenna system, when the first antenna receives a signal, the frequency of the antenna end can be tuned through the first tunable phase-shifting circuit, the distribution of signals of different frequencies on the radio frequency channel can be performed through the first tunable power divider, and the distribution of signals of different frequencies on the radio frequency end can be realized through the first tunable filter, thereby realizing the precise frequency control from the antenna end to the radio frequency end and the matching control of the frequency and the radio frequency channel.

[0085] For the LB+LB combined 4*4 MIMO antenna system, four antennas can be included, which realize the principle of the first antenna, i.e., the main set antenna of the radio frequency, the diversity antenna of the radio frequency, the MIMO main set antenna, and the MIMO diversity antenna, so as to realize the frequency matching control from the antenna end to the radio frequency end in the LB+LB combined 4*4 MIMO antenna system.

[0086] It can be understood that when the first antenna is used as the main set antenna of the radio frequency, the first antenna can also be used for transmitting a signal. When the first antenna is used for transmitting a signal, for example, Figure 4BAs shown, the circuit coupled with the main antenna set can further include a second tunable power divider. The second tunable power divider is coupled between the first radio frequency integrated module and the first tunable filter. In combination Figure 4A and Figure 4B It can be known that the first end r of the second tunable power divider is coupled with the second end of the first radio frequency integrated module, and the second end q of the second tunable power divider is coupled with the first end j of the first tunable filter. When the first antenna is used for receiving signals, the first radio frequency integrated module is configured to send a second dual-frequency signal LB1 PRX+LB2 PRX to the second tunable power divider; the second tunable power divider is configured to receive the second dual-frequency signal LB1 PRX+LB2 PRX sent by the first radio frequency integrated module, and send the second dual-frequency signal LB1 PRX+LB2 PRX to the first tunable filter; and the first tunable filter is configured to receive the second dual-frequency signal LB1 PRX+LB2 PRX sent by the second tunable power divider.

[0087] When Figure 4B The first antenna is a main antenna set of radio frequency, and when the main antenna set is used for transmitting signals:

[0088] The second tunable power divider is further configured to combine two signals received from different frequency radio frequency channels into a third dual-frequency signal, and send the third dual-frequency signal to the first radio frequency integrated module; for example, the two signals received by the second tunable power divider from two radio frequency channels are LB1 TX and LB2 TX, and the second tunable power divider can combine LB1 TX and LB2 TX to transmit to the first radio frequency integrated module on one radio frequency channel, and the third dual-frequency signal after combination can be exemplified as LB1 TX+LB2 TX (LB1+LB2 TX).

[0089] The first radio frequency integrated module is configured to send the third dual-frequency signal to the antenna integrated module; for example, the first radio frequency integrated module sends the third dual-frequency signal LB1 TX+LB2 TX to the first antenna integrated module.

[0090] The first antenna integration module is also configured to demodulate the third dual-frequency signal received from the first radio frequency integration module, separate the third dual-frequency signal into a third frequency signal and a fourth frequency signal according to the frequencies of the radio frequency channels between the first tunable power divider and the first antenna integration module, and transmit the third frequency signal and the fourth frequency signal to the first tunable power divider. For example, after the first antenna integration module demodulates the third dual-frequency signal LB1 TX+LB2 TX, assuming that the first tunable power divider adjusts the frequencies of the two radio frequency channels between the first tunable power divider and the first antenna integration module to LB1 and LB2, the first antenna integration module can separate LB1 TX+LB2 TX into a third frequency signal LB1 TX and a fourth frequency signal LB2 TX, and transmit LB1 TX on the radio frequency channel with the frequency of LB1 and LB2 TX on the radio frequency channel with the frequency of LB2.

[0091] The first tunable power divider is also configured to adjust the frequencies of the radio frequency channels between the first tunable power divider and the first antenna integration module, combine the third frequency signal and the fourth frequency signal received from the first antenna integration module into a fourth dual-frequency signal, and transmit the fourth dual-frequency signal to the first tunable phase shift circuit. For example, when the first tunable power divider receives the third frequency signal LB1 TX and the fourth frequency signal LB2 TX, in order to enable the first antenna to transmit the dual-frequency signal, the first tunable power divider can combine the third frequency signal LB1 TX and the fourth frequency signal LB2 TX into a fourth dual-frequency signal LB1 TX+LB2 TX and transmit the fourth dual-frequency signal to the first tunable phase shift circuit.

[0092] The first tunable phase shift circuit is also configured to adjust the frequency of the main set antenna to transmit the fourth dual-frequency signal received from the first tunable power divider through the main set antenna. That is, when the first tunable phase shift circuit adjusts the frequency of the main set antenna to the dual frequency LB1+LB2, the main set antenna can transmit the fourth dual-frequency signal LB1 TX+LB2 TX received from the first tunable phase shift circuit.

[0093] In this way, when the main set antenna transmits the dual-frequency signal, the frequency matching control from the antenna end to the radio frequency end can also be realized through the first tunable phase shift circuit, the first tunable power divider, and the second tunable power divider coupled with the main set antenna.

[0094] It can be understood that the main set antenna can realize the transmission and reception of signals, so that on the radio frequency channel coupled with the first antenna, there can be both transmission of the transmission signal TX and transmission of the reception signal PRX. TX and PRX can be transmitted in frequency division, that is, transmission of the transmission signal and the reception signal can be realized simultaneously in the frequency division duplex (TDD) mode. For example,Figure 4C As shown, on the first antenna-coupled radio frequency channel, the combined signal LB1 TRX+LB2 TRX can be transmitted, or the separated LB1 TRX or LB2 TRX can be transmitted. Wherein, LB1 TRX includes LB1 TX and LB1 PRX, and LB2 TRX includes LB2 TX and LB2 PRX.

[0095] It can be understood that when a combined signal is transmitted on a radio frequency channel, such as the first, second, third and fourth dual-frequency signals described above, a TDD mode can also be used for transmission, such as the first dual-frequency signal LB1 PRX+LB2 PRX using a TDD mode to simultaneously transmit LB1 PRX and LB2 PRX. Of course, the TDD mode is also applicable to other dual-frequency signals of the present application.

[0096] Of course, to realize the combination of LB+LB and 4*4 MIMO to receive signals, on the basis of Figure 4C When the first antenna is a radio frequency main diversity antenna, the antenna system can further include a second radio frequency antenna (such as a diversity antenna), a first MIMO antenna and a second MIMO antenna. Figure 4D As shown, the antenna system includes a radio frequency main diversity antenna ANT1, a first tunable phase-shifting circuit, a first tunable power divider and a first tunable filter coupled to the ANT1, and further includes a diversity antenna ANT2, a second antenna integrated module, a second radio frequency integrated module, a first MIMO antenna ANT3 and a second MIMO antenna ANT4; a second tunable phase-shifting circuit, a third tunable power divider and a second tunable filter coupled to the ANT2; a third tunable phase-shifting circuit, a fourth tunable power divider and a third tunable filter coupled to the ANT3; and a fourth tunable phase-shifting circuit, a fifth tunable power divider and a fourth tunable filter coupled to the ANT4.

[0097] Referring to Figure 4D Similar to the process of ANT1 for receiving signals, when ANT2 is used to receive signals:

[0098] The second tunable phase-shifting circuit is used to adjust the frequency of the diversity antenna when receiving signals, so as to receive a fifth dual-frequency signal from the diversity antenna and send the fifth dual-frequency signal to the third tunable power divider; for example, the first tunable phase-shifting circuit connected to the ANT2 is used to adjust the frequency of the ANT2 to LB1+LB2, and the ANT2 can receive a fifth dual-frequency signal LB1+LB2DRX with a frequency of LB1+LB2, and the second tunable phase-shifting circuit can receive the fifth dual-frequency signal LB1+LB2DRX from the ANT2 and send the fifth dual-frequency signal LB1+LB2DRX to the third tunable power divider.

[0099] a third tunable power divider for adjusting the frequency of the radio frequency channel between the third tunable power divider and the first antenna integrated module; for example, the third tunable power divider adjusts the frequency of one radio frequency channel between the third tunable power divider and the first antenna integrated module to LB1, and adjusts the frequency of another radio frequency channel between the third tunable power divider and the first antenna integrated module to LB2.

[0100] According to the frequency of the radio frequency channel between the third tunable power divider and the first antenna integrated module, the fifth dual-frequency signal received from the second tunable phase-shifting circuit is separated into a fifth frequency signal and a sixth frequency signal, and the fifth frequency signal and the sixth frequency signal are transmitted to the first antenna integrated module; for example, according to the above example, the third tunable power divider can separate LB1DRX+LB2DRX received from ANT2 into a fifth frequency signal LB1DRX and a sixth frequency signal LB2DRX according to the frequencies LB1 and LB2 of different radio frequency channels between the first antenna integrated module;

[0101] The first antenna integrated module is configured to demodulate the fifth frequency signal and the sixth frequency signal received from the third tunable power divider, combine the two demodulated signals into a sixth dual-frequency signal, and transmit the sixth dual-frequency signal to the first radio frequency integrated module; for example, according to the above example, the first antenna integrated module can be provided with a switch module, and the fifth frequency signal LB1DRX and the sixth frequency signal PB2DRX received from the third tunable power divider can be output to the first radio frequency integrated module on one radio frequency channel, i.e., the sixth dual-frequency signal LB1DRX+LB2DRX is transmitted to the first radio frequency integrated module through one radio frequency channel;

[0102] The first radio frequency integrated module is configured to transmit the sixth dual-frequency signal to the second tunable filter; for example, the first radio frequency integrated module transmits the sixth dual-frequency signal LB1DRX+LB2DRX to the first tunable filter;

[0103] The second tunable filter is configured to receive the sixth dual-frequency signal from the first radio frequency integrated module and output the sixth dual-frequency signal on different radio frequency channels according to the frequency; for example, the second tunable filter is configured to output the received sixth dual-frequency signal LB1DRX+LB2DRX through different radio frequency channels according to the frequencies LB1 and LB2, one radio frequency channel outputs LB1DRX, and another radio frequency channel outputs LB2DRX. For example, LB1DRX and LB2DRX output by the second tunable filter can be output to a processor connected to the antenna system for further processing.

[0104] When the ANT3 antenna is used to receive signals:

[0105] a third tunable phase shift circuit for adjusting the frequency of the first MIMO antenna receiving signal to receive a seventh dual frequency signal from the first MIMO antenna and send the seventh dual frequency signal to a fourth tunable power divider; for example, the third tunable phase shift circuit connected with ANT3 is used to adjust the frequency of ANT3 at LB1+LB2, ANT3 can receive the seventh dual frequency signal LB1+LB2 MIMO PRX with the frequency of LB1+LB2, the third tunable phase shift circuit can receive the seventh dual frequency signal LB1+LB2 MIMO PRX from ANT3 and send the seventh dual frequency signal LB1+LB2 MIMO PRX to the fourth tunable power divider.

[0106] a fourth tunable power divider for adjusting the frequency of the radio frequency channel between the fourth tunable power divider and the second antenna integrated module; for example, the frequency of one radio frequency channel between the fourth tunable power divider and the second antenna integrated module is adjusted to LB1, and the frequency of another radio frequency channel between the fourth tunable power divider and the second antenna integrated module is adjusted to LB2.

[0107] the fourth tunable power divider separates the seventh dual frequency signal received from the third tunable phase shift circuit into a seventh frequency signal and an eighth frequency signal according to the frequency of the radio frequency channel between the fourth tunable power divider and the second antenna integrated module, and transmits the seventh frequency signal and the eighth frequency signal to the second antenna integrated module; for example, according to the above example, the fourth tunable power divider can separate LB1 MIMO PRX+LB2 MIMO PRX received from the third tunable phase shift circuit into a seventh frequency signal LB1 MIMO PRX and an eighth frequency signal PB2 MIMO PRX according to the frequencies LB1 and LB2 of different radio frequency channels between the fourth tunable power divider and the second antenna integrated module.

[0108] the second antenna integrated module demodulates the seventh frequency signal and the eighth frequency signal received from the fourth tunable power divider, combines the two demodulated signals into an eighth dual frequency signal, and sends the eighth dual frequency signal to the radio frequency integrated module; for example, according to the above example, the second antenna integrated module can be provided with a switch module, for example, the seventh frequency signal LB1 MIMO PRX and the eighth frequency signal PB2 MIMO PRX received from the fourth tunable power divider can be output to the second radio frequency integrated module on one radio frequency channel, that is, the eighth dual frequency signal LB1 MIMO PRX+LB2 MIMO PRX is sent to the second radio frequency integrated module through one radio frequency channel;

[0109] a second RFIC module for sending the eighth dual frequency signal to a third tunable filter; for example, the second RFIC module sends the eighth dual frequency signal LB1 MIMO PRX+LB2 MIMO PRX to the third tunable filter;

[0110] a third tunable filter for receiving the eighth dual frequency signal from the second RFIC module and distributing the eighth dual frequency signal on different RF channels according to frequency; for example, the third tunable filter is configured to output the received eighth dual frequency signal LB1 MIMO PRX+LB2 MIMO PRX through different RF channels according to the frequencies of LB1 and LB2, one RF channel outputs LB1 MIMO PRX and another RF channel outputs LB2 MIMO PRX. For example, the LB1 MIMO PRX and LB2 MIMO PRX output by the third tunable filter can be output to a processor connected to the antenna system for further processing.

[0111] when the ANT4 antenna is used to receive signals:

[0112] a fourth tunable phase shift circuit for adjusting the frequency of the second MIMO antenna when receiving signals, so as to receive a ninth dual frequency signal from the second MIMO antenna and send the ninth dual frequency signal to a fifth tunable power divider; for example, the fourth tunable phase shift circuit connected to the ANT4 is used to adjust the frequency of the ANT4 to LB1+LB2, and the ANT4 can receive the ninth dual frequency signal LB1 MIMO DRX+LB2 MIMO DRX with the frequency of LB1+LB2. The fourth tunable phase shift circuit can receive the ninth dual frequency signal LB1 MIMO DRX+LB2 MIMO DRX from the ANT4 and send the ninth dual frequency signal LB1 MIMO DRX+LB2 MIMO DRX to the fifth tunable power divider.

[0113] a fifth tunable power divider for adjusting the frequency of the RF channel between the fifth tunable power divider and the second antenna integrated module; for example, the frequency of one RF channel between the fifth tunable power divider and the second antenna integrated module is adjusted to LB1, and the frequency of another RF channel between the fifth tunable power divider and the second antenna integrated module is adjusted to LB2.

[0114] a fifth tunable power divider for splitting the ninth dual frequency signal received from the fourth tunable phase shift circuit into a ninth frequency signal and a tenth frequency signal according to the frequency of the radio frequency channel between the second antenna integrated module, and transmitting the ninth frequency signal and the tenth frequency signal to the second antenna integrated module; for example, according to the above example, the fifth tunable power divider can split LB1 MIMO DRX+LB2 MIMO DRX received from the fourth tunable phase shift circuit into a ninth frequency signal LB1 MIMO DRX and a tenth frequency signal PB2 MIMO DRX according to the frequencies LB1 and LB2 of different radio frequency channels between the second antenna integrated module.

[0115] a second antenna integrated module for demodulating the ninth frequency signal and the tenth frequency signal received from the fourth tunable power divider, combining the two demodulated signals into a tenth dual frequency signal, and transmitting the tenth dual frequency signal to a second radio frequency integrated module; for example, according to the above example, a switch module can be provided in the second antenna integrated module, and the ninth frequency signal LB1 MIMO DRX and the tenth frequency signal PB2 MIMO DRX received from the fifth tunable power divider can be output to the second radio frequency integrated module on one radio frequency channel, i.e., the tenth dual frequency signal LB1 MIMO DRX+LB2 MIMO DRX is transmitted to the second radio frequency integrated module through one radio frequency channel;

[0116] a second radio frequency integrated module for transmitting the tenth dual frequency signal to a fourth tunable filter; for example, the second radio frequency integrated module transmits the tenth dual frequency signal LB1 MIMO DRX+LB2 MIMO DRX to the fourth tunable filter;

[0117] a fourth tunable filter for outputting the tenth dual frequency signal received from the second radio frequency integrated module on different radio frequency channels according to the frequency; for example, the fourth tunable filter is used to output the received tenth dual frequency signal LB1 MIMO DRX+LB2 MIMO DRX through different radio frequency channels according to the frequencies LB1 and LB2, one radio frequency channel outputs LB1 MIMO DRX, and the other radio frequency channel outputs LB2 MIMO DRX. For example, LB1 MIMO DRX and LB2 MIMO DRX output by the fourth tunable filter can be output to a processor connected to the antenna system for further processing.

[0118] wherein ANT2 is connected to the antenna integrated module and the radio frequency integrated module in a similar manner to ANT1, and the connection mode is as described in Figure 4D :

[0119] One end w of ANT2 is coupled with a first end x of a second tunable phase-shifting circuit, a second end v of the second tunable phase-shifting circuit is coupled with a first end u of a third tunable power divider, a second end s of the third tunable power divider is coupled with a fourth end y of the first antenna integrated module; a third end t of the third tunable power divider is coupled with a fifth end z of the antenna integrated module;

[0120] A sixth end n of the first antenna integrated module is coupled with a third end o of the first radio frequency integrated module; a fourth end k of the first radio frequency integrated module is coupled with a first end l of the second tunable filter.

[0121] ANT3 and ANT4 are coupled with the third tunable phase-shifting circuit, the fourth tunable power divider, the second antenna integrated module, the second radio frequency integrated module and the fourth tunable filter in the same way as ANT2 is coupled in the antenna system. Here, no further description is given.

[0122] It should be noted that the first antenna integrated module and the second antenna integrated module can be different modules or the same module; the first radio frequency integrated module and the second radio frequency integrated module can be different modules or the same module.

[0123] The devices in the antenna tuning module 301 and the radio frequency tuning module 302 can be controlled by the signal control module 303 in software to adjust the frequency of the antenna, perform frequency distribution and signal distribution.

[0124] Therefore, the present application can realize various LB+LB 4*4 MIMO combinations through the signal control module by adding the antenna tuning module and the radio frequency tuning module, thereby reducing the number of antennas, multiplexers and multi-frequency filters under various complex LB+LB 4*4 MIMO combinations and reducing the occupied area of the printed circuit board (PCB).

[0125] In combination Figure 4D The antenna system shown, the control flow of the LB+LB compatible MIMO antenna scheme of the present application and some implementation modes of the antenna tuning module 301 and the radio frequency tuning module 302 are introduced below. Taking that the antenna system is used for receiving signals as an example, referring to Figure 5 The control flow of the present application can include:

[0126] 501. The antenna system judges whether the dual-frequency compatible MIMO combination is within the achievable range.

[0127] In some embodiments, the terminal device can store a list of supportable frequencies and MIMO specifications, for example, the list includes an indication of support for LB1, LB2, LB3, …, LBn frequencies, and an indication of support for 2*2 MIMO, 4*4 MIMO, etc. When the terminal device receives an indication from the network side, for example, receives a first indication from the base station, indicating that the terminal device transmits a signal compatible with 4*4 MIMO for the combination of LB1+LB2 frequencies, the terminal device can check in the list whether the frequency and MIMO indicated by the first indication are supported according to the first indication. If supported, proceed to step 502, if not supported, the flow ends.

[0128] Step 501 can be determined by the signal control module 303 in the antenna system corresponding to the software program.

[0129] In some embodiments, as Figure 6 The software program of the signal control module 303 of the present application controls the module in the hardware circuit structure provided by the present application. Figure 4D The signal control module 303 can be divided into a function analysis module, an LB+LB main diversity antenna control module, and an LB+LB MIMO antenna control module according to functions. The LB+LB main diversity antenna control module is mainly used to control the LB+LB signal of the main diversity antenna and the diversity antenna of the radio frequency, for example, the TRX and DRX of LB1+LB2, including the control of the first tunable phase-shifting circuit, the first tunable power divider, the first tunable filter, the third tunable power divider, the first antenna integrated module, and the first radio frequency integrated module. The LB+LB MIMO antenna control module is mainly used to control the LB+LB signal of the MIMO antenna, for example, the PRX and DRX of LB2+LB3, including the control of the second tunable phase-shifting circuit, the second tunable power divider, the second tunable filter, and the second antenna integrated module and the second radio frequency integrated module. The function analysis module is mainly used for function analysis, feedback, and signal synchronization of main diversity, diversity & MIMO. Figure 6 The function analysis module shown in the figure includes a plurality of signal synchronization modules for signal synchronization of main diversity, diversity & MIMO.

[0130] Reference is made to Figure 6, the LB+LB main diversity antenna control module can determine whether the terminal device supports the LB+LB combined frequency indicated by the base station, and if so, the LB+LB main diversity antenna control module controls the antenna tuning module 301 to execute the subsequent process, for example, the LB+LB main diversity antenna control module sends an indication to the first tunable phase shift circuit to execute step 502; the LB+LB MIMO antenna control module can determine whether the terminal device supports MIMO indicated by the base station, and if so, the LB+LB MIMO antenna control module can continue to control the antenna tuning module 301 to execute the subsequent process, for example, the LB+LB MIMO antenna control module sends an indication to the second tunable phase shift circuit to execute step 502.

[0131] 502、The antenna system adjusts the frequency of the main diversity antenna, the diversity antenna, and the MIMO antenna receiving signal through the antenna tuning module 301.

[0132] When the first tunable phase shift circuit and the second tunable phase shift circuit receive the indication of the LB+LB main diversity antenna control module, as shown in Figure 6 , the first tunable phase shift circuit connected with the main diversity antenna can: 1) select the LB+LB antenna in the terminal device; 2) adjust the frequency of the LB+LB antenna to control the beam of the main diversity antenna to form according to the adjusted frequency. The implementation of the second tunable phase shift circuit connected with the diversity antenna and the first tunable phase shift circuit is similar.

[0133] When the third tunable phase shift circuit and the fourth tunable phase shift circuit receive the indication of the LB+LB MIMO antenna control module, as shown in Figure 6 , the second tunable phase shift circuit connected with the MIMO antenna and the fourth tunable phase shift circuit can: 1) select the LB+LB MIMO antenna in the terminal device; 2) adjust the frequency of the LB+LB MIMO antenna to control the beam of the LB+LB MIMO antenna to form according to the adjusted frequency.

[0134] For example, the first tunable phase shift circuit includes a plurality of variable capacitor groups connected with the open end of the radiation patch of the main diversity antenna ANT1, and the LB+LB main diversity antenna control module can control the capacitance value of the plurality of variable capacitor groups to adjust the frequency of the main diversity antenna ANT1 to LB1+LB2 when receiving and transmitting signals, that is, the main diversity antenna ANT1 transmits and receives signals as LB1 PRX / TX+LB2 PRX / TX. Similarly, the LB+LB main diversity antenna control module can also control the capacitance value of the plurality of variable capacitor groups of the second tunable phase shift circuit connected with the radiation patch of the diversity antenna ANT2 to adjust the frequency of the diversity antenna ANT2 to LB1+LB2 when receiving signals, that is, the receiving signal of the diversity antenna ANT2 is LB1+LB2 D RX.

[0135] Similarly, the third tunable phase shifting circuit and the fourth tunable phase shifting circuit have similar structure as the first tunable phase shifting circuit. For example, the third tunable phase shifting circuit can include a second variable capacitor set connected with the open end of the radiating patch of the MIMO antenna ANT3, and the second variable capacitor set is used to adjust the frequency of the received signal of ANT3. It can be understood that the LB+LB MIMO antenna control module can control the capacitance value of the plurality of second variable capacitors of the third tunable phase shifting circuit connected with the radiating patch of ANT3 to adjust the frequency of the received signal of the MIMO antenna ANT3 to LB1+LB2, that is, the MIMO antenna ANT3 can receive LB1 MIMO PRX+LB2 MIMO PRX. Similarly, the fourth tunable phase shifting circuit is used to adjust the frequency of ANT4 to LB1+LB2, so that ANT4 can receive LB1 MIMO PRX+LB2 MIMO DRX.

[0136] 503、The antenna system separates the dual-frequency signals received by the main diversity antenna, the diversity antenna and the MIMO antenna according to the frequency of the radio frequency channel through the antenna tuning module 301.

[0137] For example, referring to Figure 4D When the LB+LB main diversity antenna control module completes the frequency adjustment of the main diversity antenna ANT1 and the diversity antenna ANT2, the LB+LB main diversity antenna control module can control the first tunable power divider corresponding to the main diversity antenna ANT1 in the antenna tuning module 301, so that the first tunable power divider adjusts the frequency of the radio frequency channel between the first tunable power divider and the antenna integration module to LB1 and LB2. When the first tunable power divider receives the combined signal LB1 PRX+LB2 PRX sent by the first tunable phase shifting circuit, the first tunable power divider can separate LB1 PRX+LB2 PRX into LB1 PRX and LB2 PRX, that is, LB1 PRX and LB2 PRX are transmitted to the first antenna integration module on two radio frequency channels respectively. Similarly, the LB+LB main diversity antenna control module can control the third tunable power divider corresponding to the diversity antenna NAT2 in the antenna tuning module 301, so that the third tunable power divider transmits LB1 DRX and LB2 DRX to the first antenna integration module on two radio frequency channels respectively.

[0138] For example, after the LB+LB MIMO antenna control module completes the frequency adjustment of the MIMO antennas ANT3 and ANT4, the LB+LB MIMO antenna control module can control the fourth tunable power divider and the fifth tunable power divider corresponding to ANT3 and ANT4 in the antenna tuning module 301 to separate the LB1 MIMO PRX+LB2 MIMO PRX received by the MIMO antenna ANT3 and transmit them to the second antenna integration module on two radio frequency channels, and separate the LB1 MIMO DRX+LB2 MIMO DRX received by ANT4 and transmit them to the second antenna integration module on two radio frequency channels.

[0139] That is, the first tunable power divider as shown in Figure 6 allocates the frequency of the main set antenna, and the fourth tunable power divider allocates the frequency of the MIMO antenna.

[0140] In some embodiments, the circuit structures of the first tunable power divider, the second tunable power divider, the third tunable power divider, the fourth tunable power divider, and the fifth tunable power divider are similar. The first tunable power divider can include: a multi-path power divider, each path of the multi-path power divider including a microstrip transmission line, a second variable capacitor set and a DC bias circuit connected to the microstrip transmission line; and the second variable capacitor set and the DC bias circuit are used to adjust the frequency of the microstrip transmission line. The microstrip transmission line can be understood as a radio frequency channel for transmitting signals.

[0141] For example, Figure 7 The circuit structure diagram of the first tunable power divider is shown, wherein the multi-path power divider can adopt a Wilkinson power divider+ferroelectric film variable capacitor structure. The Wilkinson power divider can adopt an equal-power or unequal-power N-path power divider structure, which includes a signal input end 71 (connected to the output end of the first tunable phase-shifting circuit) and two or more microstrip transmission lines. Figure 7 A 3-microstrip transmission line 73, 74 and 75 is shown, Figure 4D The N-path power divider structure includes 2 microstrip transmission lines. Among them, the microstrip transmission line can be a single-section transformer, a multi-section transformer, or a tapered line transmission line structure, and the microstrip transmission line can be matched with different LC matching networks to adjust the impedance of the microstrip transmission line, realize different power distribution, and adjust the frequency of each channel. For LB+LB combination, if there is no special case, it is considered that the power distribution of each microstrip transmission line is the same. Two or more short-circuit adjustable branches 76 and 77 can be added to each microstrip transmission line of the N-path power divider, and the short-circuit adjustable branch includes a second variable capacitor set and a DC bias circuit Figure 7The dielectric layer of the second variable capacitor bank can be ferroelectric thin film material such as BST or PZT, and the LB+LB diversity antenna control module can change the voltage on the second variable capacitor bank to change the capacitance value to adjust the frequencies of the microstrip transmission lines 73, 74 and 75 in LB1 / LB3, LB2 / LB4, LB5 / LB6 respectively.

[0142] According to the principle of Figure 7 , Figure 4D The first tunable power divider connected with the main set antenna ANT1 separates the LB1 PRX+LB2 PRX corresponding to the main set antenna ANT1 and transmits them to the first antenna integrated module on two microstrip transmission lines, one microstrip transmission line transmits LB1 PRX to the first antenna integrated module, and the other microstrip transmission line transmits LB2 PRX to the first antenna integrated module.

[0143] The third tunable power divider connected with the diversity antenna ANT2 separates the LB1 DRX+LB2 DRX corresponding to the diversity antenna ANT2 and transmits them to the first antenna integrated module on two microstrip transmission lines, one microstrip transmission line transmits LB1 DRX to the first antenna integrated module, and the other microstrip transmission line transmits LB2 DRX to the first antenna integrated module.

[0144] The fourth tunable power divider connected with the MIMO antenna ANT3 separates the LB1+LB2 MIMO PRX corresponding to the MIMO antenna ANT3 and transmits them to the second antenna integrated module on two microstrip transmission lines, one microstrip transmission line transmits LB1 MIMO PRX to the second antenna integrated module, and the other microstrip transmission line transmits LB2 MIMO PRX to the second antenna integrated module.

[0145] The fifth tunable power divider connected with the MIMO antenna ANT4 separates the LB1+LB2 MIMO DRX corresponding to the MIMO antenna ANT4 and transmits them to the second antenna integrated module on two microstrip transmission lines, one microstrip transmission line transmits LB1 MIMO DRX to the second antenna integrated module, and the other microstrip transmission line transmits LB2 MIMO DRX to the second antenna integrated module.

[0146] In addition, in some embodiments, the first tunable power divider can further include: a plurality of first tunable impedances, each of the plurality of first tunable impedances being connected across adjacent microstrip transmission lines for port isolation of the adjacent microstrip transmission lines.

[0147] For example, referring to Figure 7 , the first tunable impedances 78 are connected across the microstrip transmission lines 73, 74 and 75 for port isolation between the transmission lines, Figure 7The first tunable impedance 78 shown in the figure is a tunable resistance, and can also be implemented by a tunable LC network. Generally, the real part of the first tunable impedance 78 is required to be greater than 1k.

[0148] Similarly, the second tunable power divider, the third tunable power divider, the fourth tunable power divider and the fifth tunable power divider can also include a plurality of first tunable impedances, and the principle can be referred to the description of the first tunable power divider.

[0149] 504、The antenna system detects whether the frequency of the main diversity antenna, the frequency of the diversity antenna, the frequency of the MIMO antenna meet the requirements, and detects whether the isolation between the main diversity antenna, the diversity antenna and the MIMO antenna meets the requirements. If it is determined that the requirements are not met, it returns to step 502 for continuous execution, and if it is determined that the requirements are met, it continues to step 505.

[0150] When the frequency adjustment of the first tunable power divider and the third tunable power divider by the LB+LB main diversity antenna control module is completed, and the frequency adjustment of the fourth tunable power divider and the fifth tunable power divider by the LB+LB MIMO antenna control module is completed, in order to improve the isolation between the antennas, for example, a coupler and an odd-even mode method can also be used between the signal output end of the first tunable power divider and the antenna integration module to improve the isolation between the main diversity antenna PRX and DRX, the MIMO antenna PRX and DRX, and the main diversity antenna and the MIMO antenna.

[0151] In some embodiments, a coupler and a plurality of second tunable impedances (not shown in the figure) are connected between the first tunable power divider and the first antenna integration module, for isolating the main diversity antenna, the diversity antenna and the MIMO antenna. Figure 4D Thus, the LB+LB main diversity antenna control module can also realize the isolation between the antennas by controlling the coupler and the plurality of second tunable impedances. Similarly, a coupler and a tunable impedance can also be connected between the third tunable power divider and the first antenna integration module; a coupler and a tunable impedance can also be connected between the fourth tunable power divider and the fifth tunable power divider and the second antenna integration module.

[0152] For example, the circuit structure of the coupler and the plurality of second tunable impedances connected between the first tunable power divider and the first antenna integration module can be as shown in Figure 8As shown. The first tunable power divider is connected with the first antenna integrated module, and a coupler 81, a signal detection system 84, a second tunable impedance 82 and a tunable large resistance 83 are connected between the first tunable power divider and the first antenna integrated module. The coupler 81 can adopt a directional / reverse / turn coupler structure, similar to the tunable power divider, and for different LB1+LB2 combinations, a tunable short-circuit stub can be added to the microstrip transmission line where the coupler 81 is located, for adjusting the frequency of the coupler 81. The through port 811 of the coupler 81 transmits signals to the first antenna integrated module, and the coupled port 812 of the coupler 81 feeds back signals to the signal detection system 84. In addition, the odd-even mode method is used to improve the isolation between antennas, for example Figure 8 In the PRX and DRX, MIMO PRX and MIMO DRX signals, a second tunable impedance 82 is used for cross-connection, and the second tunable impedance 82 can be realized by a tunable resistance or a tunable LC network. Generally, the real part of the second tunable impedance 82 can be required to be greater than 1k. The signals of the main set antenna, the signals of the diversity antenna and the MIMO antenna signals can be directly isolated by the tunable large resistance 83, and the resistance of the tunable large resistance 83 can generally be greater than 5k.

[0153] The signal detection system 84 can detect whether the frequency on the microstrip transmission line where the coupler 81 is located meets the requirements according to the signals input by the coupler 81, for example, whether the frequency is adjusted to the frequency of LB1. If the requirements are not met, the frequency of the microstrip transmission line can be further adjusted. The signal detection system 84 can also detect whether the resistance of the second tunable impedance 82 and the tunable large resistance 83 meets the requirements, i.e. whether the isolation between antennas meets the requirements. If the requirements are not met, the resistance of the second tunable impedance 82 and the tunable large resistance 83 can be further adjusted.

[0154] 505, the antenna system performs signal reception from the antenna end to the radio frequency end.

[0155] When the LB+LB main diversity antenna control module controls the signal detection system 84 in the antenna tuning module 301 to complete the detection and meet the requirements, the LB+LB main diversity antenna control module can control the antenna integrated module connected with the main set antenna ANT1 of the radio frequency to realize: 1) select the LB+LB combination; 2) demodulate and separate the PRX signals of LB+LB respectively and output two PRX signals to the first radio frequency integrated module. For example, as shown in Figure 6 Figure 4D ​As shown, the first antenna integration module selects LB1 PRX and LB2 PRX received from the first tunable power divider to perform signal combination after demodulation, to obtain a dual-frequency signal LB1 PRX+LB2 PRX sent to the first radio frequency integration module, to realize signal reception between the antenna end and the radio frequency end. Similarly, for the diversity antenna ANT2, the antenna integration module can select LB1 DRX and LB2 DRX to perform signal combination, to obtain a dual-frequency signal LB1 DRX+LB2 DRX, to realize signal reception between ANT2 and the radio frequency end.

[0156] Similarly, as shown in Figure 6 The LB+LB MIMO antenna control module can control the antenna integration module connected with the MIMO antenna to realize: 1) selection of LB+LB MIMO combination; 2) demodulation and output of the DRX and PRX signals of the LB+LB MIMO to the second radio frequency integration module, respectively. For example, as shown in Figure 4D The second antenna integration module selects two signals LB1 MIMO PRX and LB2 MIMO PRX received from the fourth tunable power divider to perform signal combination after demodulation, to obtain a dual-frequency signal LB1 MIMO PRX+LB2 MIMO PRX, to realize signal reception between the MIMO antenna ANT3 and the radio frequency end; the second antenna integration module selects two signals LB1 MIMO DRX and LB2 MIMO DRX received from the fifth tunable power divider to perform signal combination after demodulation, to obtain a dual-frequency signal LB1 MIMO DRX+LB2 MIMO DRX, to realize signal reception between the MIMO antenna ANT4 and the radio frequency end.

[0157] In some embodiments, the first antenna integration module can include an integration module, for example, a switch module, to realize signal combination switching between the antenna end and the radio frequency end, i.e., to select two frequency signals received from one antenna ANT1 through the switch module, to combine the two frequency signals into a dual-frequency signal output to the first radio frequency integration module, and to output signals of other antennas, for example, ANT2. Similarly, the second antenna integration module can also include a switch module.

[0158] 506、The antenna system transmits signals to the radio frequency tuning module 302 of the radio frequency front end through the first radio frequency integration module and the second radio frequency integration module.

[0159] For example, referring to Figure 4DThe LB+LB main diversity antenna control module controls the first radio frequency integrated module connected with the main diversity antenna to realize: transmitting the received double-frequency signal LB1 PRX+LB2 PRX corresponding to the main antenna ANT1 to the second tunable power divider of the radio frequency tuning module 301, and transmitting the received double-frequency signal LB1 DRX+LB2 DRX corresponding to the diversity antenna ANT2 to the second tunable filter of the radio frequency tuning module 301.

[0160] The LB+LB MIMO antenna control module controls the second radio frequency integrated module connected with the MIMO antenna to realize: transmitting the received double-frequency signal LB1 MIMO PRX+LB2 MIMO PRX corresponding to the MIMO antenna ANT3 to the third tunable filter of the radio frequency tuning module 301, and transmitting the received double-frequency signal LB1 MIMO DRX+LB2 MIMO DRX corresponding to the MIMO antenna ANT4 to the fourth tunable filter of the radio frequency tuning module.

[0161] 507、The antenna system outputs the double-frequency signal corresponding to the main antenna, the double-frequency signal corresponding to the diversity antenna and the double-frequency signal corresponding to the MIMO antenna after signal separation by the radio frequency tuning module 302.

[0162] It can be understood that the radio frequency tuning module 302 is used to separate and output the PRX, DRX, MIMO PRX and MIMO DRX of the LB+LB signal according to different frequencies. That is, as shown in Figure 6 , the LB+LB main diversity antenna control module controls the first tunable filter connected with the main diversity antenna to realize: signal separation of the LB+LB combined PRX, and the LB+LB MIMO antenna control module controls the third tunable filter connected with the MIMO antenna to realize: signal separation of the LB+LB combined MIMO PRX and output.

[0163] Therefore, it can be understood that, referring to Figure 4D , the first tunable filter is used to separate the double-frequency signal LB1 PRX+LB2 PRX of ANT1 into LB1 PRX and LB2 PRX according to different frequencies and output on different radio frequency channels;

[0164] The second tunable filter is used to separate the double-frequency signal LB1 DRX+LB2 DRX of ANT2 into LB1 DRX and LB2 DRX according to different frequencies and output on different radio frequency channels;

[0165] The third tunable filter is used to output the LB1 MIMO PRX and LB2 MIMO PRX on different radio frequency channels after separating the dual-frequency signal LB1 MIMO PRX+LB2 MIMO PRX of ANT3 according to different frequencies.

[0166] The fourth tunable filter is used to output the LB1 MIMO DRX and LB2 MIMO DRX on different radio frequency channels after separating the dual-frequency signal LB1 MIMO DRX+LB2 MIMO DRX of ANT4 according to different frequencies.

[0167] It can be understood that the second tunable power divider in the radio frequency tuning module 302 can be used to realize the separation of the TX and PRX of the LB+LB signal, that is, when ANT1 is used to receive a signal, the second tunable power divider can output the received dual-frequency signal on the radio frequency channel of the received signal to the first tunable filter; when ANT2 is used to transmit a signal, the second tunable power divider can combine the two frequency signals LB1 TX and LB2 TX to be output into a dual-frequency signal LB1 TX+LB2 TX and output to the first radio frequency integrated module. As shown in Figure 6 The antenna system can further include a radio frequency signal transmitting / receiving module and a MIMO radio frequency signal receiving module, and the LB+LB main diversity antenna control module can control the radio frequency signal transmitting / receiving module to realize: the transmission of the LB+LB TX signal transmitted by the radio frequency tuning module connected to the main diversity antenna, the reception of the LB+LB PRX and DRX signal; the LB+LB MIMO antenna control module controls the MIMO radio frequency signal receiving module to realize: the reception of the LB+LB MIMO PRX and DRX signal transmitted by the radio frequency tuning module connected to the MIMO antenna.

[0168] 508、The antenna system judges whether a new dual-frequency compatible MIMO combination needs to be realized, if yes, returns to step 501 for continuous execution, if no, ends.

[0169] Therefore, compared with the existing LB+LB 2*2 MIMO, the application realizes LB+LB 4*4 MIMO specification, so that the downlink rate of the 5G terminal device is doubled. Moreover, compared with the existing implementation scheme, since the application increases the adjustable antenna tuning module and the radio frequency tuning module, the antenna system provided by the application can support multiple LB+LB 4*4 MIMO combinations at the same time, reduces the number of antennas and multiplexers, and multi-frequency filters under multiple complex LB+LB 4*4 MIMO combinations, solves the device customization difficulty, antenna cost and area limitation problem under the LB+LB and 4*4 MIMO combination of the 5G terminal device. By simultaneously changing the capacitance group value of the adjustable phase shifter, the adjustable power divider and the adjustable filter of the LB+LB combination antenna, the frequency, the LB+LB MIMO signal combination and the impedance matching of the antenna end and the radio frequency end can be cooperatively controlled, and the precise frequency and matching control from the antenna end to the radio frequency end can be realized.

[0170] It can be understood that, in order to realize the above functions, the antenna system includes corresponding hardware and / or software modules for performing each function. The algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in hardware or a combination of hardware and computer software. Whether a certain function is implemented in hardware or computer software driven hardware depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application in conjunction with the embodiments, but such implementation should not be considered beyond the scope of the application.

[0171] The present embodiment can divide the functional modules of the antenna system according to the above method examples. For example, each functional module can be divided according to each function, or two or more functions can be integrated in one processing module. The integrated module can be implemented in the form of hardware. It should be noted that the division of modules in the present embodiment is illustrative, and is only a logical function division. When actually implemented, there can be another division method.

[0172] In the case of dividing each functional module according to each function, Figure 9 A possible composition schematic diagram of the antenna system involved in the above embodiments is shown, which can be in a radio frequency device 90. The radio frequency device can be a radio frequency chip, such as Figure 9As shown, the radio frequency device 90 can include a tuning unit 901, a control unit 902, an antenna integration unit 903, and a radio frequency integration unit 904. The tuning unit 901 can include the antenna tuning unit 301 and the radio frequency tuning unit 302 described above; the control unit 902 can include the signal control module 303 described above; the antenna integration unit 903 can include the first antenna integration module and the second antenna integration module described above, and the radio frequency integration unit 904 can include the first radio frequency integration module and the second radio frequency integration module described above.

[0173] The control unit 902 can be configured to support the radio frequency device 90 to perform the steps 501, 508, etc. described above, and / or other processes of the techniques described herein, such as sending control instructions to the tuning unit 901, the antenna integration unit 903, and the radio frequency integration unit 904.

[0174] The tuning unit 901 can be configured to support the radio frequency device 90 to perform the steps 502, 503, 504, 507, etc. described above, and / or other processes of the techniques described herein.

[0175] The antenna integration unit 903 can be configured to support the radio frequency device 90 to perform the steps 505, etc. described above, and / or other processes of the techniques described herein.

[0176] The radio frequency integration unit 904 can be configured to support the radio frequency device 90 to perform the steps 506, etc. described above, and / or other processes of the techniques described herein.

[0177] It should be noted that all relevant content of each step involved in the above method embodiments can be cited from the function description of the corresponding functional module, which will not be repeated here.

[0178] The radio frequency device 90 provided in the embodiment is configured to perform the frequency control method described above, and thus can achieve the same effects as the implementation method described above.

[0179] For example, the radio frequency device 90 can be configured to perform the steps 501, 502, 503, 504, 505, 506, 507, 508, etc. described above. Figure 10As shown, the radio frequency device 90 where the tuning unit 901, the antenna integration unit 903 and the radio frequency integration unit 904 are located can be included in a transceiver for processing the received signals and transmitting signals to other devices. The present application also provides a communication device 100 including a transceiver, a processor and a memory. The processor or controller, which can implement or execute the various exemplary logical blocks, modules and circuits described in connection with the present application, such as the controller including the control unit 902. The processor can also be a combination of implementing computing functions, such as a combination of one or more microprocessors, a combination of digital signal processing (DSP) and microprocessors, and the like. The memory can be used to store software programs executed by the control unit 902 for implementing the above control processes.

[0180] Figure 11 A structural schematic diagram of a terminal device is shown, for ease of illustration, Figure 11 Only the main components of the terminal device are shown. As Figure 11 As shown, the terminal device 110 includes a processor 1102, a memory 1103, a control circuit, an antenna and an input / output device. The processor 1102 is mainly used for processing communication protocols and communication data, and controlling the entire terminal device, executing software programs, processing data of software programs, such as for supporting the terminal device 110 to perform the actions described in the above method embodiments. The memory 1103 is mainly used for storing software programs and data. The control circuit is mainly used for the conversion between baseband signals and radio frequency signals and the processing of radio frequency signals. The control circuit and the antenna together can also be called a transceiver 1101, which is mainly used for transceiving radio frequency signals in the form of electromagnetic waves. The control circuit can include the radio frequency chip provided in the present application; the input / output device, such as a touch screen, a display screen, a keyboard, etc., is mainly used for receiving user input data and outputting data to the user.

[0181] When the terminal device is powered on, the processor 1102 can read the software program of the memory, interpret and execute the instructions of the software program, and process the data of the software program. When data needs to be transmitted wirelessly, the processor 1102 performs baseband processing on the data to be transmitted, and outputs the baseband signal to the radio frequency circuit. The radio frequency circuit converts the baseband signal into a radio frequency signal, and transmits the radio frequency signal in the form of electromagnetic waves through the antenna. When data is transmitted to the terminal device, the radio frequency circuit receives the radio frequency signal through the antenna, converts the radio frequency signal into a baseband signal, and outputs the baseband signal to the processor 1102. The processor 1102 converts the baseband signal into data and processes the data.

[0182] The embodiment of the present application further provides a computer storage medium, which stores computer instructions, and when the computer instructions are executed on an electronic device, the electronic device executes the related method steps to implement the frequency control method in the above embodiment.

[0183] The embodiment of the present application further provides a computer program product, which, when executed on a computer, causes the computer to execute the related steps to implement the frequency control method executed by the electronic device in the above embodiment.

[0184] In addition, the embodiment of the present application further provides an apparatus, which can be a chip, a component or a module, and the apparatus can include a processor and a memory connected to each other; the memory is used to store computer execution instructions; when the apparatus is running, the processor can execute the computer execution instructions stored in the memory to enable the chip to execute the frequency control method executed by the electronic device in the above method embodiments.

[0185] The terminal device, the computer storage medium, the computer program product or the chip provided by the embodiment can be used to execute the corresponding method provided above, and thus the beneficial effects achieved thereby can refer to the beneficial effects of the corresponding method provided above, which will not be described herein again.

[0186] Through the description of the above embodiments, those skilled in the art can understand that, for the convenience and brevity of description, only the division of the above functional modules is taken as an example for illustration, and in actual application, the above functions can be completed by different functional modules according to needs, that is, the internal structure of the apparatus is divided into different functional modules to complete all or part of the functions described above.

[0187] In the several embodiments provided by the present application, it should be understood that the disclosed apparatus and method can be implemented in other ways. For example, the apparatus embodiments described above are only schematic. The division of the modules or units is only a logical function division, and there can be another division manner in actual implementation. For example, a plurality of units or components can be combined or integrated into another apparatus, or some features can be ignored or not executed. In addition, the displayed or discussed mutual couplings or direct couplings or communication connections between the units can be indirect couplings or communication connections through some interfaces, apparatuses or units, and can be electrical, mechanical or in other forms.

[0188] The units described as separate components can or can not be physically separate, and the components displayed as units can be one physical unit or multiple physical units, that is, can be located in one place, or can be distributed to multiple different places. Some or all of the units can be selected according to actual needs to achieve the purpose of the embodiment scheme.

[0189] In addition, each function unit in each embodiment of the present application can be integrated in one processing unit, or each unit can be physically present separately, or two or more units can be integrated in one unit. The integrated unit can be realized in the form of hardware or in the form of a software function unit.

[0190] The integrated unit, if realized in the form of a software function unit and sold or used as an independent product, can be stored in a readable storage medium. Based on such understanding, the technical solutions of the embodiments of the present application essentially or the part that contributes to the prior art or the whole or part of the technical solutions can be embodied in the form of a software product. The software product is stored in a storage medium and includes a plurality of instructions for causing an apparatus (which can be a single-chip microcomputer, a chip, etc.) or a processor to execute all or part of the steps of the method described in each embodiment of the present application. The foregoing storage medium includes a U disk, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk, and various media that can store program codes.

[0191] The above is only a specific embodiment of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art can easily think of changes or replacements within the technical scope disclosed in the present application, which should be covered in the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. An antenna system, characterized in that, The antenna system includes a first antenna integrated module, a first radio frequency integrated module, a first antenna, a first tunable phase shift circuit coupled to the first antenna, a first tunable power divider, and a first tunable filter; When the first antenna is used to receive signals: The first tunable phase-shifting circuit is used to adjust the frequency of the first antenna when receiving signals, so as to receive a first dual-frequency signal from the first antenna and send the first dual-frequency signal to the first tunable power divider. The first tunable power divider is used to adjust the frequency of the radio frequency channel between the first tunable power divider and the first antenna integrated module; According to the frequency of the radio frequency channel between the first tunable power divider and the first antenna integration module, the first dual-frequency signal received from the first tunable phase shift circuit is separated into a first frequency signal and a second frequency signal, and the first frequency signal and the second frequency signal are transmitted to the first antenna integration module. The first antenna integration module is used to demodulate the first frequency signal and the second frequency signal received from the first tunable power divider, combine the two demodulated signals into a second dual-frequency signal, and send the second dual-frequency signal to the first radio frequency integration module. The first radio frequency integrated module is used to transmit the second dual-frequency signal; The first tunable filter is used to receive the second dual-frequency signal and distribute the second dual-frequency signal on different radio frequency channels according to the frequency.

2. The antenna system according to claim 1, characterized in that, When the first antenna is the main antenna, the antenna system further includes a second tunable power divider coupled to the main antenna; when the main antenna is used to receive signals: The first radio frequency integrated module is used to send the second dual-frequency signal to the second tunable power divider; The second tunable power divider is used to receive the second dual-frequency signal sent by the first RF integrated module and send the second dual-frequency signal to the first tunable filter. The first tunable filter is used to receive the second dual-frequency signal sent by the second tunable power divider.

3. The antenna system according to claim 2, characterized in that, When the first antenna is the main antenna, and the main antenna is used to transmit signals: The second tunable power divider is also used to combine two signals received from radio frequency channels of different frequencies into a third dual-frequency signal, and send the third dual-frequency signal to the first radio frequency integrated module; The first radio frequency integrated module is used to send the third dual-frequency signal to the antenna integrated module; The first antenna integration module is further configured to demodulate the third dual-frequency signal received from the first radio frequency integration module, and to separate the third dual-frequency signal into a third frequency signal and a fourth frequency signal according to the frequency of the radio frequency channel between the first tunable power divider, and to send the third frequency signal and the fourth frequency signal to the first tunable power divider. The first tunable power divider is also used to adjust the frequency of the radio frequency channel between the first tunable power divider and the first antenna integrated module; to combine the third frequency signal and the fourth frequency signal received from the first antenna integrated module into a fourth dual-frequency signal, and to send the fourth dual-frequency signal to the first tunable phase shift circuit; The first tunable phase-shifting circuit is further configured to adjust the frequency of the main antenna to transmit the fourth dual-frequency signal received from the first tunable power divider via the main antenna.

4. The antenna system according to any one of claims 1-3, characterized in that, When the first antenna is the main antenna, the antenna system further includes a second antenna, a second tunable phase-shifting circuit coupled to the second antenna, a third tunable power divider, and a second tunable filter; The second antenna is a diversity antenna, which is used to receive signals as follows: The second tunable phase-shifting circuit is used to adjust the frequency of the signal received by the diversity antenna in order to receive the fifth dual-frequency signal from the diversity antenna and send the fifth dual-frequency signal to the third tunable power divider. The third tunable power divider is used to adjust the frequency of the radio frequency channel between the third tunable power divider and the first antenna integrated module; According to the frequency of the radio frequency channel between the third tunable power divider and the first antenna integration module, the fifth dual-frequency signal received from the second tunable phase shift circuit is separated into a fifth frequency signal and a sixth frequency signal, and the fifth frequency signal and the sixth frequency signal are transmitted to the first antenna integration module. The first antenna integration module is used to demodulate the fifth frequency signal and the sixth frequency signal received from the third tunable power divider, combine the two modulated signals into a sixth dual-frequency signal, and send the sixth dual-frequency signal to the first radio frequency integration module. The first radio frequency integrated module is used to send the sixth dual-frequency signal to the second tunable filter; The second tunable filter is used to receive the sixth dual-frequency signal from the first RF integrated module and distribute the sixth dual-frequency signal on different RF channels according to the frequency.

5. The antenna system according to claim 4, characterized in that, The antenna system further includes a second antenna integrated module, a second radio frequency integrated module, a first MIMO antenna and a second MIMO antenna; a third tunable phase shift circuit, a fourth tunable power divider and a third tunable filter coupled to the first MIMO antenna; and a fourth tunable phase shift circuit, a fifth tunable power divider and a fourth tunable filter coupled to the second MIMO antenna. When the first MIMO antenna is used to receive signals: The third tunable phase-shifting circuit is used to adjust the frequency of the first MIMO antenna when receiving signals, so as to receive the seventh dual-frequency signal from the first MIMO antenna and send the seventh dual-frequency signal to the fourth tunable power divider. The fourth tunable power divider is used to adjust the frequency of the radio frequency channel between the fourth tunable power divider and the second antenna integrated module; according to the frequency of the radio frequency channel between the fourth tunable phase shift circuit and the second antenna integrated module, the seventh dual-frequency signal received from the fourth tunable phase shift circuit is separated into a seventh frequency signal and an eighth frequency signal, and the seventh frequency signal and the eighth frequency signal are transmitted to the second antenna integrated module. The second antenna integration module is used to demodulate the seventh frequency signal and the eighth frequency signal received from the fourth tunable power divider, combine the two demodulated signals into an eighth dual-frequency signal, and send the eighth dual-frequency signal to the second radio frequency integration module. The second radio frequency integrated module is used to send the eighth dual-frequency signal to the third tunable filter; The third tunable filter is used to receive the eighth dual-frequency signal from the second RF integrated module and distribute the eighth dual-frequency signal on different RF channels according to the frequency for output. When the second MIMO antenna is used to receive signals: The fourth tunable phase-shifting circuit is used to adjust the frequency of the second MIMO antenna when receiving signals, so as to receive the ninth dual-frequency signal from the second MIMO antenna and send the ninth dual-frequency signal to the fifth tunable power divider. The fifth tunable power divider is used to adjust the frequency of the radio frequency channel between the fifth tunable power divider and the second antenna integrated module; according to the frequency of the radio frequency channel between the fifth tunable power divider and the second antenna integrated module, the ninth dual-frequency signal received from the fourth tunable phase shift circuit is separated into a ninth frequency signal and a tenth frequency signal, and the ninth frequency signal and the tenth frequency signal are transmitted to the second antenna integrated module. The second antenna integration module is used to demodulate the ninth frequency signal and the tenth frequency signal received from the fourth tunable power divider, combine the two demodulated signals into a tenth dual-frequency signal, and send the tenth dual-frequency signal to the second radio frequency integration module. The second radio frequency integrated module is used to send the tenth dual-frequency signal to the third tunable filter; The fourth tunable filter is used to receive the tenth dual-frequency signal from the second RF integrated module and distribute the tenth dual-frequency signal on different RF channels according to the frequency.

6. The antenna system according to any one of claims 1-3, characterized in that, The first tunable phase-shifting circuit includes: The first variable capacitor bank is connected to the open terminal of the radiating patch of the first antenna; The first variable capacitor bank is used to adjust the dual frequencies when the first antenna receives signals and when it transmits signals.

7. The antenna system according to any one of claims 1-3, characterized in that, The first tunable power divider includes: A power divider, wherein each power divider includes a microstrip transmission line, a second variable capacitor bank connected to the microstrip transmission line, and a DC bias circuit; each microstrip transmission line corresponds to one radio frequency channel; The second variable capacitor bank and the DC bias circuit are used to adjust the frequency of the microstrip transmission line; A plurality of first tunable impedances, each of the plurality of first tunable impedances being connected across adjacent microstrip transmission lines for port isolation of adjacent microstrip transmission lines.

8. The antenna system according to any one of claims 1-3, characterized in that, The first tunable power divider is connected to the antenna integration module by a coupler and multiple second tunable impedances, which are used to isolate the first antenna from other antennas.

9. A downlink control method, characterized in that, Applied to an antenna system, the antenna system includes a first antenna integrated module, a first radio frequency integrated module, a first antenna, a first tunable phase shift circuit coupled to the first antenna, a first tunable power divider, and a first tunable filter; When the first antenna is used to receive signals, the method includes: The first tunable phase-shifting circuit is controlled to adjust the frequency of the first antenna when receiving signals, so as to receive a first dual-frequency signal from the first antenna; the first tunable phase-shifting circuit is controlled to send the first dual-frequency signal to the first tunable power divider. The first tunable power divider is controlled to adjust the frequency of the radio frequency channel between the first tunable power divider and the first antenna integrated module. According to the frequency of the radio frequency channel between the first tunable power divider and the first antenna integrated module, the first tunable power divider is controlled to separate the first dual-frequency signal into a first frequency signal and a second frequency signal, and the first frequency signal and the second frequency signal are transmitted to the first antenna integrated module. The first antenna integration module is controlled to demodulate the first frequency signal and the second frequency signal, combine the two demodulated signals into a second dual-frequency signal, and send the second dual-frequency signal to the first radio frequency integration module; Control the first radio frequency integrated module to send the second dual-frequency signal; The first tunable filter is controlled to receive the second dual-frequency signal and to distribute the second dual-frequency signal on different radio frequency channels according to the frequency.

10. The method according to claim 9, characterized in that, When the first antenna is the main antenna, the antenna system further includes a second tunable power divider coupled to the main antenna; when the main antenna is used to receive signals, controlling the first RF integrated module to send the second dual-frequency signal includes: The first radio frequency integrated module is controlled to send the second dual-frequency signal to the second tunable power divider. The second tunable power divider is controlled to send the second dual-frequency signal to the first tunable filter.

11. The method according to claim 10, characterized in that, When the first antenna is a master antenna, and the master antenna is used to transmit signals, the method further includes: The second tunable power divider is controlled to combine two signals received from radio frequency channels of different frequencies into a third dual-frequency signal, and the third dual-frequency signal is sent to the first radio frequency integrated module. The first radio frequency integrated module is controlled to send the third dual-frequency signal to the first antenna integrated module; The first antenna integration module is controlled to demodulate the third dual-frequency signal and, according to the frequency of the radio frequency channel between the first tunable power divider and the third dual-frequency signal, separate the third dual-frequency signal into a third frequency signal and a fourth frequency signal, and send the third frequency signal and the fourth frequency signal to the first tunable power divider. The first tunable power divider is controlled to adjust the frequency of the radio frequency channel between the first tunable power divider and the first antenna integrated module; the received third frequency signal and the fourth frequency signal are combined into a fourth dual-frequency signal, and the fourth dual-frequency signal is sent to the first tunable phase shift circuit. The first tunable phase-shifting circuit is controlled to adjust the frequency of the main antenna, and the first tunable phase-shifting circuit is controlled to send the fourth dual-frequency signal to the main antenna, so as to control the main antenna to transmit the fourth dual-frequency signal.

12. The method according to any one of claims 9-11, wherein the characteristic is that, When the first antenna is the main antenna, the antenna system further includes a second antenna, a second tunable phase-shifting circuit coupled to the second antenna, a third tunable power divider, and a second tunable filter; The second antenna is a diversity antenna. When the diversity antenna is used to receive signals, the method further includes: The second tunable phase-shifting circuit is controlled to adjust the frequency of the diversity antenna when receiving signals, so as to receive a fifth dual-frequency signal from the diversity antenna and send the fifth dual-frequency signal to the third tunable power divider; The third tunable power divider is controlled to adjust the frequency of the radio frequency channel between the third tunable power divider and the first antenna integrated module; the third tunable power divider is controlled to separate the fifth dual-frequency signal received from the second tunable phase shift circuit into a fifth frequency signal and a sixth frequency signal according to the frequency of the radio frequency channel between the third tunable power divider and the first antenna integrated module, and the fifth frequency signal and the sixth frequency signal are transmitted to the first antenna integrated module; The first antenna integration module is controlled to demodulate the fifth frequency signal and the sixth frequency signal received from the third tunable power divider, combine the two modulated signals into a sixth dual-frequency signal, and send the sixth dual-frequency signal to the first radio frequency integration module. The first radio frequency integrated module is controlled to send the sixth dual-frequency signal to the second tunable filter; The second tunable filter is controlled to receive the sixth dual-frequency signal from the first RF integrated module and distribute the sixth dual-frequency signal on different RF channels according to the frequency.

13. The method according to claim 12, characterized in that, The antenna system further includes a second antenna integrated module, a second radio frequency integrated module, a first MIMO antenna and a second MIMO antenna; a third tunable phase shift circuit, a fourth tunable power divider and a third tunable filter coupled to the first MIMO antenna; and a fourth tunable phase shift circuit, a fifth tunable power divider and a fourth tunable filter coupled to the second MIMO antenna. When the first MIMO antenna is used to receive signals, the method further includes: The third tunable phase-shifting circuit is controlled to adjust the frequency of the first MIMO antenna when receiving signals, so as to receive the seventh dual-frequency signal from the first MIMO antenna and send the seventh dual-frequency signal to the fourth tunable power divider. The fourth tunable power divider is controlled to adjust the frequency of the radio frequency channel between the fourth tunable power divider and the second antenna integrated module; the fourth tunable power divider is controlled to separate the seventh dual-frequency signal received from the fourth tunable phase shift circuit into a seventh frequency signal and an eighth frequency signal according to the frequency of the radio frequency channel between the fourth tunable power divider and the second antenna integrated module, and the seventh frequency signal and the eighth frequency signal are transmitted to the second antenna integrated module. The second antenna integration module is controlled to demodulate the seventh frequency signal and the eighth frequency signal received from the fourth tunable power divider, combine the two demodulated signals into an eighth dual-frequency signal, and send the eighth dual-frequency signal to the second radio frequency integration module. The second radio frequency integrated module is controlled to send the eighth dual-frequency signal to the third tunable filter; The third tunable filter is controlled to receive the eighth dual-frequency signal from the second RF integrated module, and the eighth dual-frequency signal is distributed and output on different RF channels according to the frequency. When the second MIMO antenna is used to receive signals, the method further includes: The fourth tunable phase-shifting circuit is controlled to adjust the frequency of the second MIMO antenna when receiving signals, so as to receive the ninth dual-frequency signal from the second MIMO antenna and send the ninth dual-frequency signal to the fifth tunable power divider; The fifth tunable power divider is controlled to adjust the frequency of the radio frequency channel between the fifth tunable power divider and the second antenna integrated module; according to the frequency of the radio frequency channel between the fifth tunable power divider and the second antenna integrated module, the ninth dual-frequency signal received from the fourth tunable phase shift circuit is separated into a ninth frequency signal and a tenth frequency signal, and the ninth frequency signal and the tenth frequency signal are transmitted to the second antenna integrated module; The second antenna integration module is controlled to demodulate the ninth frequency signal and the tenth frequency signal received from the fourth tunable power divider, combine the two demodulated signals into a tenth dual-frequency signal, and send the tenth dual-frequency signal to the second radio frequency integration module. The second radio frequency integrated module is controlled to send the tenth dual-frequency signal to the third tunable filter; The fourth tunable filter is controlled to receive the tenth dual-frequency signal from the second RF integrated module, and the tenth dual-frequency signal is distributed and output on different RF channels according to the frequency.

14. The method according to any one of claims 9-11, characterized in that, The control of the first tunable phase-shifting circuit to adjust the frequency of the first antenna receiving the signal includes: The first variable capacitor bank in the first tunable phase-shifting circuit is controlled to adjust the frequency of the first antenna when receiving signals. The first variable capacitor bank is connected to the open terminal of the radiating patch of the first antenna.

15. The method according to any one of claims 9-11, characterized in that, The first tunable power divider includes: a multi-channel power divider, each of which includes a microstrip transmission line, a second variable capacitor bank connected to the microstrip transmission line, and a DC bias circuit; each microstrip transmission line corresponds to a radio frequency channel; and a plurality of first tunable impedances, each of which is connected across adjacent microstrip transmission lines. The step of controlling the first tunable power divider to adjust the frequency of the radio frequency channel between the first tunable power divider and the first antenna integrated module includes: The frequency of the microstrip transmission line is adjusted by the second variable capacitor bank and DC bias circuit connected to the microstrip transmission line included in each power divider; and port isolation of adjacent microstrip transmission lines is achieved by the plurality of first tunable impedances.

16. The method according to any one of claims 9-11, characterized in that, The first tunable power divider is connected to the antenna integration module by a coupler and multiple second tunable impedances, which are used to isolate the first antenna from other antennas.

17. A communication device, characterized in that, Including the antenna system as described in any one of claims 1-8.

18. A computer-readable storage medium, characterized in that, Includes computer instructions that, when executed on an electronic device, cause the electronic device to perform the method described in any one of claims 9-16.

19. A computer program product, characterized in that, When the computer program product is run on a computer, it causes the electronic device to perform the method described in any one of claims 9-16.

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