CN112532282B

CN112532282B - Communication method and terminal device

Info

Publication number: CN112532282B
Application number: CN201910888651.1A
Authority: CN
Inventors: 黄菲; 徐佳; 车翔; 熊恩亮; 陈志君; 张昌峰
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2019-09-19
Filing date: 2019-09-19
Publication date: 2022-01-14
Anticipated expiration: 2039-09-19
Also published as: CN112532282A

Abstract

The application provides a terminal device and a communication method, which can improve the phenomenon of antenna mutual interference in the terminal device. The terminal device includes: a first antenna and a second antenna; a first signal link and a matching link, the matching link comprising a matching network; a switch switching unit; the switch switching unit is used for switching the first antenna from the first signal link to the matching link at a first moment, and switching the second antenna to the first signal link at or after the first moment; wherein the configuration of the matching network is such that: the difference value between the first impedance and the second impedance is smaller than a preset threshold value, the first impedance is the impedance between the first output end of the switch switching unit and the ground under the condition that the first antenna is switched to the matching link, and the second impedance is the impedance between the first output end of the switch switching unit and the ground under the condition that the first antenna is switched to the first signal link.

Description

Communication method and terminal device

Technical Field

The present application relates to the field of communications, and in particular, to a communication method and a terminal device.

Background

A plurality of antennas are generally provided in a terminal device, and since electromagnetic fields between the antennas affect each other, completely independent operation cannot be achieved. For example, changes in the electromagnetic field of antenna a will affect the distribution of the electromagnetic field of antenna B, thereby causing variations in the amplitude and/or phase of the signals received and/or transmitted by antenna B, resulting in fluctuations and degradation of data throughput.

In some scenarios, the antenna may be switched between different signal links, and the switching may cause the impedance of the antenna to change, thereby affecting the field distribution of the antenna. Due to the same-frequency mutual interference among the antennas, the impedance change of one antenna may affect the field distribution of other antennas, thereby affecting the signal continuity of other antennas and causing the deterioration of throughput. For example, with the advent of the fifth generation communication system (5G), there may be multiple communication systems in a terminal device, each configured with multiple antennas. Interference may occur between antennas between different communication systems. For example, a Long Term Evolution (LTE) system and a New Radio (NR) system may coexist in a terminal device, and the NR system may support a Sounding Reference Signal (SRS) round. During SRS round-robin transmission, the NR system needs to switch the transmitting antenna frequently, and during the switching, the antenna field in the LTE system may be affected, thereby deteriorating the throughput of the LTE system.

Disclosure of Invention

The application provides a communication method and terminal equipment, which can improve the phenomenon of mutual interference of antennas of a multi-antenna system in the terminal equipment.

In a first aspect, a terminal device is provided, which includes: a first antenna and a second antenna; a first signal link and a matching link, the matching link comprising a matching network; a switch switching unit comprising: a first input terminal connected to the first signal link; the second input end is connected with the matching link; the first output end is connected with the first antenna, and the second output end is connected with the second antenna; the switch switching unit is used for switching the first antenna from the first signal link to the matching link at a first moment; the switch switching unit is further configured to switch the second antenna to the first signal link at or after the first time; wherein the configuration of the matching network is such that: the difference value between a first impedance and a second impedance is smaller than a preset threshold value, the first impedance is an impedance between a first output end of the switch switching unit and the ground when the first antenna is switched to the matching link, and the second impedance is an impedance between the first output end of the switch switching unit and the ground when the first antenna is switched to the first signal link.

In this embodiment of the application, when the terminal device switches the first antenna, the first antenna may be switched from the first signal link to the matching link, where the matching link includes a matching network, and the configuration of the matching network makes a first impedance of the first antenna after the switch is switched and a second impedance of the first antenna before the switch is switched smaller than a preset threshold, so as to reduce, as much as possible, a change in an antenna field of the first antenna before and after the switch is switched, thereby reducing interference of the first antenna on other antennas.

With reference to the first aspect, in a possible implementation manner, the matching network is configured such that: the difference between the first impedance and the second impedance is smaller than a preset threshold, and the method comprises the following steps: the matching network is configured such that: the first impedance is the same as the second impedance.

With reference to the first aspect, in a possible implementation manner, the terminal device further includes a second signal link, the switch switching unit further includes a third input end, the third input end is connected to the second signal link, and the switch switching unit is further configured to switch the second antenna to the first signal link at the first time or after the first time, and includes: the switch switching unit is configured to switch the second antenna from the second signal link to the first signal link at or after the first time.

With reference to the first aspect, in a possible implementation manner, the terminal device further includes a third antenna, where the matching network includes multiple sub-matching networks, and the multiple sub-matching networks correspond to multiple frequency bands of transmission signals of the third antenna; the switch switching unit is configured to switch the first antenna from the first signal link to the matching link at a first time, and includes: the switch switching unit is configured to switch the first antenna to a first sub-matching network of the plurality of sub-matching networks at the first time, where the first sub-matching network corresponds to a frequency band of a current transmission signal of the third antenna.

In this embodiment of the application, the matching network may include a plurality of sub-matching networks, and the plurality of sub-matching networks correspond to a plurality of frequency bands of transmission signals of the third antenna, so that the first antenna may be flexibly switched to the corresponding sub-matching network according to the frequency band of the current transmission signal of the third antenna, thereby reducing mutual interference of antennas in the plurality of frequency bands.

With reference to the first aspect, in a possible implementation manner, the terminal device further includes a third antenna, and the matching network is a tuning matching network, where the configuration of the matching network is such that: the difference value between the first impedance and the second impedance is smaller than a preset threshold value, and the method comprises the following steps: the impedance configuration of the tuned matching network is such that: the first impedance corresponds to a frequency band of a signal currently transmitted by the third antenna.

In this embodiment of the application, the matching network may be a tuned matching network, so that the first impedance of the first antenna may be flexibly adjusted by adjusting the impedance of the tuned matching network according to the frequency band of the current transmission signal of the third antenna, thereby reducing mutual interference of antennas in multiple frequency bands.

With reference to the first aspect, in a possible implementation manner, the tuning matching network is configured to adjust an impedance of the tuning matching network before the first time, so that the first impedance corresponds to a frequency band of a signal currently transmitted by the third antenna.

With reference to the first aspect, in a possible implementation manner, the matching link includes a second signal link and a matching network, the second signal link is connected to the first input end of the combiner, the matching network is connected to the second input end of the combiner, and the output end of the combiner is connected to the second input end of the switch switching unit.

In a second aspect, a communication method is provided, which is applied to a terminal device, where the terminal device includes a first antenna and a second antenna; a first signal link and a matching link, the matching link comprising a matching network; a switch switching unit comprising: a first input terminal connected to the first signal link; the second input end is connected with the matching link; a first output coupled to the first antenna and a second output coupled to the second antenna, the method comprising: switching a first antenna from the first signal link to the matching link at a first time; switching the second antenna to the first signal link at or after the first time; wherein the configuration of the matching network is such that: the difference value between a first impedance and a second impedance is smaller than a preset threshold value, the first impedance is an impedance between a first output end of the switch switching unit and the ground when the first antenna is switched to the matching link, and the second impedance is an impedance between the first output end of the switch switching unit and the ground when the first antenna is switched to the first signal link.

It should be understood that the communication method of the second aspect and the terminal device of the first aspect are based on the same inventive concept, and therefore, the technical solutions of the second aspect may refer to the description of the first aspect and are not described again.

With reference to the second aspect, in a possible implementation manner, the matching network is configured such that: the difference value between the first impedance and the second impedance is smaller than a preset threshold value, and the method comprises the following steps: the matching network is configured such that: the first impedance is the same as the second impedance.

With reference to the second aspect, in a possible implementation manner, the terminal device further includes a second signal link, the switch switching unit further includes a third input end, the third input end is connected to the second signal link, and switching the second antenna to the first signal link at or after the first time includes: switching the second antenna from the second signal link to the first signal link at or after the first time.

With reference to the second aspect, in a possible implementation manner, the terminal device further includes a third antenna, where the matching network includes multiple sub-matching networks, and the multiple sub-matching networks correspond to multiple frequency bands of transmission signals of the third antenna; the switching the first antenna from the first signal link to the matching link at a first time comprises: and switching the first antenna to a first sub-matching network in the plurality of sub-matching networks at the first moment, wherein the first sub-matching network corresponds to the frequency band of the current transmission signal of the third antenna.

With reference to the second aspect, in a possible implementation manner, the method further includes a third antenna, and the matching network is a tuning matching network, where the matching network is configured such that: the difference value between the first impedance and the second impedance is smaller than a preset threshold value, and the method comprises the following steps: the impedance configuration of the tuned matching network is such that: the first impedance corresponds to a frequency band of a signal currently transmitted by the third antenna.

With reference to the second aspect, in a possible implementation manner, the tuning matching network is configured to adjust an impedance of the tuning matching network before the first time, so that the first impedance corresponds to a frequency band of a signal currently transmitted by the third antenna.

With reference to the second aspect, in a possible implementation manner, the matching link includes a second signal link and a matching network, the second signal link is connected to the first input end of the combiner, the matching network is connected to the second input end of the combiner, and the output end of the combiner is connected to the second input end of the switch switching unit.

In a third aspect, a terminal device is provided, which includes: a processor. The processor is configured to execute instructions, the processor is configured to read and execute a computer program stored in the memory to perform the second aspect or the method in any possible implementation manner of the second aspect. Optionally, the terminal device further comprises a memory, and the memory and the processor are connected with the memory through a circuit or a wire. Optionally, the circuitry further comprises a communication interface.

In a fourth aspect, the present application provides a computer-readable storage medium having stored thereon computer instructions which, when executed on a computer, cause the computer to perform the method of the second aspect or any possible implementation thereof.

In a fifth aspect, the present application provides a computer program product comprising computer program code which, when run on a computer, causes the computer to perform the method of the second aspect or any possible implementation thereof.

In a sixth aspect, the present application provides a chip, where the chip includes a processing circuit, and the processing circuit is configured to execute the method in the second aspect or any possible implementation manner thereof.

Drawings

Fig. 1 is a schematic diagram of a radio frequency circuit of a terminal device according to an embodiment of the present application.

Fig. 2 is a schematic diagram of a radio frequency circuit of a terminal device according to another embodiment of the present application.

Fig. 3 is a schematic diagram of a radio frequency circuit of a terminal device according to another embodiment of the present application.

Fig. 4 is a schematic diagram of a radio frequency circuit of a terminal device according to another embodiment of the present application.

Fig. 5 is a schematic diagram of a radio frequency circuit of a terminal device according to another embodiment of the present application.

Fig. 6 is a schematic diagram of a radio frequency circuit of a terminal device according to another embodiment of the present application.

Fig. 7 is a schematic diagram of a radio frequency circuit of a terminal device according to another embodiment of the present application.

Fig. 8 is a schematic diagram of a radio frequency circuit of a terminal device according to another embodiment of the present application.

Fig. 9 is a schematic diagram of a radio frequency circuit of a terminal device according to another embodiment of the present application.

Fig. 10 is a schematic diagram of a radio frequency circuit of a terminal device according to another embodiment of the present application.

Fig. 11 is a schematic structural diagram of a terminal device according to an embodiment of the present application.

Fig. 12 is a schematic structural diagram of a terminal device according to another embodiment of the present application.

Fig. 13 is a flowchart illustrating a communication method according to an embodiment of the present application.

Detailed Description

The technical solution in the present application will be described below with reference to the accompanying drawings.

The technical scheme of the embodiment of the application can be applied to various communication systems, for example: a Long Term Evolution (LTE) system, a Frequency Division Duplex (FDD) system, a Time Division Duplex (TDD) system, a Universal Mobile Telecommunications System (UMTS), a Worldwide Interoperability for Microwave Access (WiMAX) communication system, a future fifth Generation (5th Generation, 5G) system, a New Radio (NR), or the like.

Terminal equipment in the embodiments of the present application may refer to user equipment, access terminals, subscriber units, subscriber stations, mobile stations, remote terminals, mobile devices, user terminals, wireless communication devices, user agents, or user devices. The terminal device may also be a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a Wireless Local Loop (WLL) station, a Personal Digital Assistant (PDA), a handheld device with wireless communication function, a computing device or other processing device connected to a wireless modem, a vehicle-mounted device, a wearable device, a terminal device in a future 5G network or a terminal device in a future evolved Public Land Mobile Network (PLMN), and the like, which are not limited in this embodiment.

The network device in this embodiment may be a device for communicating with a terminal device, and the network device may be a base station, an evolved Node B (eNB) or an eNodeB in an LTE system, or a wireless controller in a Cloud Radio Access Network (CRAN) scenario, or the network device may be a relay station, an access point, a vehicle-mounted device, a new generation base station (new generation Node B, gNodeB) in a 5G network, and the like.

To facilitate understanding of the technical solutions of the embodiments of the present application, the concepts and terms involved are first described below.

Channel Sounding Reference Signal (SRS) transmission: the terminal device sequentially transmits the SRS signals on the plurality of antennas in order. The SRS signal may be used for the network device to measure the channel quality of the uplink channel. For example, the network device may measure the SRS transmitted by the terminal device to obtain the uplink channel quality. The network device may allocate corresponding uplink transmission resources or downlink transmission resources to the terminal device according to the SRS sent by the terminal device.

Mutual interference of antennas: the antennas work by receiving electromagnetic waves, and when the physical distances among the antennas are short, mutual interference can be generated among the electromagnetic fields, the quality of signals received by the antennas is influenced, and the interference is caused.

Matching network: refers to a circuit unit for performing impedance matching. The matching network may match the electrical characteristics of the circuit by configuring the impedance. Lumped parameter elements, distributed parameter elements, and/or mixed parameter elements may be included in the matching network. Wherein the lumped parameter elements may comprise, for example, capacitive, inductive, resistive, etc. elements and the distributed parameter elements may comprise, for example, transmission lines. The hybrid parameter element may include a lumped parameter element and a distributed parameter element. The matching network may comprise a fixed matching network and a tuned matching network, wherein components in the fixed matching network are not tunable, i.e. the impedance of the fixed matching network is fixed and constant for the same frequency. The tuning matching network comprises tunable elements, such as tunable capacitors, i.e. the impedance of the tuning matching network can be varied for the same frequency.

A combiner: the combiner may include a plurality of input terminals and an output terminal, and may combine a plurality of input signals in frequency to form a single signal output.

An antenna field: the electromagnetic field generated around the antenna when the antenna transmits and/or receives signals.

As can be seen from the foregoing description, in a multi-antenna system, when the field distribution of one antenna in a terminal device changes, due to the effect of co-frequency mutual interference between the antennas, the field distribution of other antennas will be affected, so that signal discontinuity of other antennas is caused, and throughput is degraded. The radio frequency circuit inside the terminal equipment often involves switching of the antenna, and therefore, the same-frequency mutual interference among the antennas is inevitably caused. The following first describes the principle of antenna mutual interference in the terminal device according to the embodiment of the present application, with reference to fig. 1.

Fig. 1 is a schematic diagram of a radio frequency circuit of a terminal device according to an embodiment of the present application. In fig. 1, the terminal device 100 includes an NR system and an LTE system as an example, and those skilled in the art can understand that the present application may also be applied to a scenario in which the terminal device includes a communication system. Among them, the NR system includes a first antenna (i.e., antenna 1 in fig. 1) and a second antenna (i.e., antenna 2 in fig. 1). The radio frequency circuitry of the NR system includes a first signal link 110 and a second signal link 120. And a switch unit is arranged between the signal link and each antenna, and the switch unit can realize the switching between different signal links and antennas. By way of example and not limitation, the switching unit may include a Double Pole Double Throw (DPDT) switch.

By way of example, the first signal link 110 may be used for transmitting signals, or for both transmitting and receiving signals. The second signal link 120 may be used for receiving signals or for transmitting and receiving signals. The LTE system further comprises a third antenna, i.e. antenna 3 in fig. 1, and the radio frequency circuitry of the LTE system further comprises a third signal link 130. The third signal link 130 transmits and/or receives signals through a third antenna. The first signal link 110, the second signal link 120, and the third signal link 130 may operate in FDD mode or TDD mode. The frequency band of the third signal link 130 for transmitting and/or receiving signals may be referred to as an LTE frequency band.

The NR system in fig. 1 includes two antennas (antenna 1 and antenna 2), and the LTE system includes one antenna (antenna 3), which are only used as examples and do not limit the scope of the embodiments of the present application. Those skilled in the art will understand that the NR system of the terminal device may further include more than two antennas, and the LTE system of the terminal device may also include two or more than two antennas.

By way of example and not limitation, the switch unit may include a DPDT switch, and in the case where the NR system includes two or more antennas, the switch unit may include a Multiple Pole Multiple Throw (MPMT) switch. The switching unit includes a first input terminal a1, a second input terminal a2, a first output terminal B1, and a second input terminal B2. Wherein the first input a1 and the second input a2 are for connecting the first signal link 110 and the second signal link 120, respectively, and the first output B1 and the second output B2 are for connecting the first antenna and the second antenna, respectively. The switches inside the switch unit can be switched between a plurality of input terminals and a plurality of output terminals, so that different input terminals and different output terminals are communicated. For example, in the case where the first input terminal a1 is connected to the first output terminal B1, and the second input terminal a2 is connected to the second output terminal B2, the switch cell may be said to be in a through state. In a state where the first input terminal a1 is connected to the second output terminal B2 and the second input terminal a2 is connected to the first output terminal B1, the switch cell can be said to be in a cross state.

With continued reference to fig. 1, during SRS transmission, the first signal link 110 needs to be sequentially switched to different antennas to transmit SRS. For example, first, the first signal link 110 transmits SRS through the first antenna (antenna 1), and the second signal link 120 receives and/or transmits signals through the second antenna (antenna 2), and at this time, the switch unit is in a direct-on state; then, the first signal link 110 is switched to the second antenna to continue transmitting the SRS signal, and the second signal link 120 is switched to the first antenna to receive and/or transmit the signal, where the switch unit is in the cross state. For the first antenna, in the LTE frequency band, the impedance when it is switched to the first signal link 110 is different from the impedance when it is switched to the second signal link 120, that is, the switching may cause the impedance of the first antenna in the LTE frequency band to change, thereby causing the field distribution of the first antenna to change. This will affect the field distribution of the third antenna transmitting signals in the LTE band due to the mutual interference effect between the antennas, thereby affecting the continuity of the signals at the third antenna, resulting in deterioration of the transmission signal quality of the third antenna. Or the NR system may cause the LTE system to suffer from the data throughput degradation when performing SRS round transmission. Since frequent switching of the switch is required when SRS is transmitted, for example, switching of one antenna every 10 milliseconds (ms) to transmit an SRS signal, the SRS transmission has a significant influence on the throughput of the LTE system. In other words, the switching of the radio frequency switch of the NR system may cause the amplitude and/or phase of the first antenna connected thereto to change abruptly, thereby causing the amplitude and/or phase of the antenna of the LTE system to change abruptly, resulting in the degradation of LTE throughput.

It should be understood that the impedance of the first antenna in the LTE frequency band may refer to an impedance between a connection node of the first antenna and the switch unit to ground when a signal transmitted by the first antenna is in the LTE frequency band. For example, it may be the impedance between the output terminal B1 of the DPDT and ground. Under normal operating conditions, the signal transmitted by the first antenna belongs to the NR frequency band. In order to obtain the impedance of the first antenna corresponding to the frequency range of the full frequency band, when the terminal device is tested, the first antenna may be used to transmit signals of different frequency bands, so as to measure the impedance of the first antenna at different frequency bands.

In addition, mutual interference between antennas can be reduced by controlling reception and transmission periods of signals of different antennas. However, this is easier to implement for antennas in the same communication system, and the scheme for synchronizing rf signals between different communication systems in the terminal device is complicated, which results in increased cost and complexity of the terminal device design.

Some common solutions to solve the mutual interference between antennas include increasing isolation from the perspective of the antennas, or using decoupling devices, or changing the form of the antennas, etc. to reduce the coupling of the same frequency band or adjacent frequency bands of the multi-antenna system. However, the above solution for solving the mutual interference of the antennas imposes constraints on the antennas themselves, and may reduce the performance of the antennas.

In view of this, the embodiments of the present application provide a new scheme for reducing inter-antenna interference. According to the scheme, the antenna form is not required to be changed, communication between the two systems is not required to be carried out, the condition of mutual interference between the antennas can be improved, and the design complexity can be reduced. The following describes the technical solutions of the embodiments of the present application in detail with reference to the accompanying drawings.

Fig. 2 is a schematic structural diagram of the terminal device 100 according to the embodiment of the present application. As shown in fig. 2, the terminal device 200 includes:

a first antenna and a second antenna (i.e., antenna 1 and antenna 2 in fig. 2);

a first signal link 110;

a matching link 140, said matching link 140 comprising a matching network;

the switch switching unit 180 includes: a first input terminal a1 coupled to the first signal link 110; a second input a2 connected to the matching link 140; a first output terminal B1 connected to the first antenna and a second output terminal B2 connected to the second antenna.

The switch switching unit 180 is configured to switch the first antenna from the first signal link 110 to the matching link 140 at a first time;

the switch switching unit 180 is further configured to switch the second antenna to the first signal link 110 at or after the first time;

wherein the configuration of the matching network is such that: the difference between a first impedance between the first output terminal B1 of the switch switching unit 180 to ground in case the first antenna is switched to the matching link 140 and a second impedance between the first output terminal B1 of the switch switching unit 180 to ground in case the first antenna is switched to the first signal link 110 is smaller than a preset threshold.

It should be understood that the first time may be a time point, or may be a short period of time, i.e. a period of time that the switching process has elapsed.

Optionally, the first signal link 110 may be used for transmitting signals and/or receiving signals. The first signal link 110 can operate in either a TDD mode or an FDD mode. If the first signal link 110 operates in TDD mode, the first antenna (or the second antenna) may be used only for transmitting signals or only for receiving signals during the same time period. If the first signal link 110 is operating in FDD mode, the first antenna (or second antenna) may be used for both transmitting and receiving signals during the same time period.

Optionally, the first signal link 110 may perform SRS transmission through the first antenna and the second antenna. For example, first signal link 110 may transmit SRS signals over a first antenna for a first time period and transmit SRS signals over a second antenna for a second time period, and the first time may be between the first time period and the second time period.

In some examples, the switch switching unit 180 may include a DPDT switch or an MPMT switch. Alternatively, the switch switching unit 180 may include a combination of various types of switches, for example, a combination of an MPMT switch and a Single Pole Multiple Throw (SPMT) switch. Or may be other types of switches, which are not limited in the embodiments of the present application.

Optionally, the first signal link 110 is a radio frequency transceiving link, and may also be a radio frequency transmitting link. By way of example and not limitation, the first signal link 110 may include: a Low Noise Amplifier (LNA), a filter, a Power Amplifier (PA), and the like.

It should be understood that the smaller the difference between the first impedance and the second impedance, the smaller the electromagnetic field variation of the first antenna before and after switching, and the smaller the interference of the first antenna with other antennas. Therefore, ideally, when the first impedance and the second impedance are equal, the antenna mutual interference of the terminal devices is minimally affected. However, in view of non-idealities, there may be a difference between the first impedance and the second impedance, the difference being less than a preset threshold. The size of the preset threshold may be determined according to practical applications, which is not limited in this application.

In some examples, the matching network is configured such that: the difference value between the first impedance and the second impedance is smaller than a preset threshold value, and the method comprises the following steps: the matching network is configured such that: the first impedance is the same as the second impedance.

It should be appreciated that the matching network in the matching chain 140 may be used to adjust the impedance of the matching chain 140 such that the first impedance of the first antenna is the same as the second impedance of the first antenna. It should be understood by those skilled in the art that the above-mentioned similarities do not mean the same in absolute terms, but mean that the values of the first impedance and the second impedance are the same within an allowable error range. In other words, impedance between the connection node of the first antenna and the switch switching unit 180 to the ground hardly changes before and after the switch switching of the first antenna, and thus an electromagnetic field of the first antenna hardly changes before and after the switch switching, so that the first antenna does not cause interference with electromagnetic fields of other antennas, resulting in deterioration of communication quality of the other antennas.

In this embodiment, when the terminal device switches the first antenna, the terminal device may switch the first antenna from the first signal link 110 to the matching link 140, where the matching link 140 includes a matching network, and the matching network is configured to make a first impedance of the first antenna after the switch is switched and a second impedance of the first antenna before the switch is switched the same, so as to reduce, as much as possible, a change in an antenna field of the first antenna before and after the switch is switched, thereby reducing interference of the first antenna on other antennas.

Optionally, as shown in fig. 2, the terminal device further includes a third antenna, and the third antenna may be connected to the third signal link 130. The third signal link 130 may transmit signals and/or receive signals through the third antenna. The third antenna may be in a TDD mode of operation or in an FDD mode of operation. The third signal link 130 may be in a different communication system than the first signal link 110 and the second signal link 120. For example, the first signal link 110 and the second signal link 120 may both belong to an NR system, and the third signal link 130 may belong to an LTE system. Alternatively, the first signal link 110, the second signal link 120 and the third signal link 130 may belong to the same communication system, for example, the first signal link 110 to the third signal link 130 all belong to an NR system or all belong to an LTE system.

In the embodiment of the application, the matching network is arranged for the first antenna, so that the impedance of the first antenna is not influenced before and after the switch on the radio frequency path is switched, the problem of antenna co-frequency mutual interference caused by antenna switching is solved from the radio frequency perspective, the antenna is not changed, communication between two systems is not needed, the antenna design is simplified, and the signaling overhead burden of the system is reduced.

It should be understood that, assuming that the first antenna will interfere with the field distribution of the third antenna when the switch is switched, or the configuration of the matching network is to reduce the interference of the first antenna with the third antenna, the first impedance needs to correspond to the frequency band of the transmission signal of the third antenna, since the field interference between the antennas is mutual. In other words, in order to reduce the influence of the change of the field of the first antenna on the third antenna, when the frequency band of the transmission signal of the third antenna changes, the first impedance should be configured to correspond to the frequency band of the current transmission signal of the third antenna. Optionally, the current transmission signal of the third antenna may be a transmission signal or a reception signal.

It should be understood that the first impedance of the first antenna corresponds to the frequency band of the transmission signal of the third antenna, which may mean that the second impedance of the first antenna corresponds to the frequency band of the current transmission signal of the third antenna. In order to obtain the impedance of the first antenna corresponding to the frequency range of the full frequency band, when the terminal device is tested, the first antenna may be used to transmit signals of different frequency bands, so as to measure the impedance of the first antenna at different frequency bands. As an example, assuming that the frequency band of the current transmission signal of the third antenna is the first frequency band, the first antenna may be switched to the first signal link, and the first antenna may be used to transmit the signal in the first frequency band. Then, the impedance between the first output terminal B1 of the switch switching unit 180 and the ground is measured, and the impedance is the first impedance of the first antenna corresponding to the frequency band of the current transmission signal of the third antenna.

It should be understood that the frequency band of the signal currently transmitted by the third antenna may refer to the frequency band of the signal transmitted by the third antenna during the switching of the first antenna.

In some examples, the matching network may be a fixed matching network or a tuned matching network.

Optionally, the tuning matching network is configured to adjust an impedance of the tuning matching network before the first time, so that the first impedance corresponds to a frequency band of a signal currently transmitted by the third antenna.

Optionally, referring to fig. 2, the terminal device may further include a second signal link. The second signal link may or may not belong to the matching link 140. The second signal link may be connected to an input of the switch switching unit 180. The second signal link 120 may be switched to the first antenna or the second antenna by the switch switching unit 180 to transmit and/or receive signals. The second signal link 120 can operate in FDD mode as well as TDD mode.

Fig. 3 is a schematic diagram of a radio frequency circuit of the terminal device 100 according to another embodiment of the present application. As shown in fig. 3, the matching link 140 may be a matching network 150, the terminal device includes a second signal link 120, the switch switching unit 180 further includes a third input terminal A3, and the second signal link 120 is connected to a third input terminal A3 of the switch switching unit 180.

In TDD mode, the second signal link 120 may be used only for receiving signals. Or the second signal link 120 may be used for both receiving and transmitting signals.

As an example, the switch switching unit 180 is further configured to switch the second antenna to the first signal link 110 at or after the first time, including: the switch switching unit 180 is configured to switch the second antenna from the second signal link 120 to the first signal link 110 at or after the first time.

As an example, the switch switching unit 180 may switch the first signal link 110 to the first antenna and the second signal link 120 to the second antenna.

As an example, assuming that the first signal link 110 and the second signal link 120 operate in a TDD mode, during a third time period, the switch switching unit 180 switches the first signal link 110 to the second antenna and the matching network 150 to the first antenna. The first antenna neither transmits nor receives signals in a third time period; the second antenna is used for transmitting signals in a third time period. During a fourth time period, the switch switching unit 180 switches the first signal link 110 to the first antenna and the second signal link 120 to the second antenna. The first antenna and the second antenna are both configured to receive signals during a fourth time period; or the first antennas are all used for sending signals in the fourth time period; or the first antenna is used for transmitting signals in the fourth time period, and the second antenna does not transmit or receive signals in the fourth time period.

It should be understood that the switching unit 180 in fig. 3 may be implemented by one switching entity, or may be implemented by a plurality of switching entities. For example, fig. 4 is a schematic structural diagram of a radio frequency circuit of a terminal device 100 according to another embodiment of the present application. Fig. 4 shows a scheme in which the switch switching unit 180 includes one DPDT switch and one Single Pole Double Throw (SPDT) switch.

As shown in fig. 4, the first input terminal a1 of the DPDT switch is connected to the first signal link 110, and the second input terminal C of the DPDT switch is connected to the output terminal D of the SPDT switch. The first output terminal B1 of the DPDT switch is connected to the first antenna (i.e., antenna 1 in fig. 4), and the second output terminal B2 of the DPDT switch is connected to the second antenna (i.e., antenna 2 in fig. 4). The second input a2 of the SPDT switch is connected to the matching network 150 and the third input A3 of the SPDT switch is connected to the second signal link 120.

Alternatively, the schemes of fig. 3 and 4 are applicable to scenarios where the first signal link 110 and the second signal link 120 operate in TDD mode, and the second signal link 120 may support a disconnection from an antenna.

In other examples, the matching link 140 includes a second signal link 120 and a matching network 150, the matching network 150 is connected to the second signal link 120, and the matching network 150 is configured to adjust an impedance of the second signal link 120 and the matching link 140 formed by the matching network 150.

For example, fig. 5 is a schematic structural diagram of a radio frequency circuit of a terminal device 100 according to another embodiment of the present application. As shown in fig. 5, the matching link 140 includes a second signal link 120 and a matching network 150, and the second signal link 120 is connected to the matching network 150.

Alternatively, the second input a2 of the switching unit 180 may be connected to the second signal link 120. Alternatively, the second input a2 of the switching unit 180 is connected to both the second signal link 120 and the matching network 150. The second signal link 120 can operate in FDD mode as well as TDD mode. Alternatively, the first signal link 110 and the second signal link 120 may belong to the same communication system. For example, the first signal link 110 and the second signal link 120 both belong to the NR system.

Optionally, the matching network 150 may be a fixed matching network or a tuned matching network.

Optionally, the second signal link 120 and the matching network 150 may be connected by a combiner. For example, fig. 6 is a schematic structural diagram of a radio frequency circuit of a terminal device according to another embodiment of the present application. As shown in fig. 6, the second signal link 120 is connected to the first input E1 of the combiner, the matching network 150 is connected to the second input E2 of the combiner, and the second input a2 of the switching unit 180 is connected to the output F of the combiner. The matching network 150 may adjust the impedance of the matching link 140 through a combiner, and the matching link 140 includes the matching network 150 and the second signal link 120.

Optionally, the schemes in fig. 5 and fig. 6 may be applied to a scenario where the first signal link 110 and the second signal link 120 are in a TDD operation mode, or a scenario where the first signal link 110 and the second signal link 120 are in an FDD operation mode.

It should be noted that, assuming that the matching network 150 is configured to reduce interference of the first antenna with the third antenna, because fields between the antennas affect each other, when frequency bands where signals transmitted by the third antenna are located are different, the second impedance of the first antenna is also different, and therefore the configuration of the first impedance of the first antenna also needs to be changed along with the second impedance. The impedance of the matching network 150 may be adjusted such that the first impedance of the first antenna may vary according to the frequency band of the currently transmitted signal of the third antenna. For example, the matching network 150 may be configured to include a plurality of sub-matching networks, each having a different impedance. Or the matching network 150 may be provided as a tuned matching network that can adjust the impedance.

Fig. 7 is a schematic structural diagram of a radio frequency circuit of a terminal device 100 according to another embodiment of the present application. As shown in fig. 7, the matching network 150 may include a plurality of sub-matching networks 1501, the sub-matching networks 1501 correspond to a plurality of frequency bands of a transmission signal of the third antenna, and each sub-matching network 1501 has different impedance.

For example, the switch switching unit 180 is configured to switch the first antenna from the first signal link 110 to the matching link at a first time, and includes: the switch switching unit 180 is configured to switch the first antenna to a first sub-matching network in the plurality of sub-matching networks 1501 at the first time, where the first sub-matching network corresponds to a frequency band of a signal currently transmitted by the third antenna.

For example, assuming that the frequency band of the transmission signal of the third antenna is a first frequency band corresponding to the first sub-matching network 1501, the switch switching unit 180 switches the first antenna to the first sub-matching network 1501. For another example, if the frequency band of the transmission signal of the third antenna is a second frequency band corresponding to the second sub-matching network 1501, the switch switching unit 180 switches the first antenna to the second sub-matching network 1501. Alternatively, the sub-matching networks 1501 may be fixed-impedance matching networks.

Fig. 8 is a schematic structural diagram of a radio frequency circuit of a terminal device 100 according to another embodiment of the present application. As shown in fig. 8, the switch switching unit 180 may include a DPDT switch and a Single Pole Multiple Throw (SPMT) switch. The rf circuit structure of fig. 8 is similar to that of fig. 4, and the same contents are not repeated for brevity. Except that the SPDT switch in fig. 4 is replaced with an SPMT switch. The matching network 150 in fig. 4 is replaced by a plurality of sub-matching networks 1501 in fig. 8. Each sub-matching network 1501 corresponds to a frequency band of the third antenna transmission signal.

In some examples, multiple frequency bands of the third antenna transmission signal may be supported by the tuned matching network 150, thereby eliminating the need to configure multiple fixed impedance sub-matching networks.

Fig. 9 is a schematic structural diagram of a radio frequency circuit of a terminal device according to another embodiment of the present application. The rf circuit structure of fig. 9 is similar to that of fig. 4, and the same contents are not repeated for brevity. Except that the matching network 150 in fig. 4 is replaced by a tuned matching network 150 in fig. 9. For example, a tunable capacitor may be included in the tuning matching network 150, and the impedance of the matching network 150 may be adjusted by adjusting the capacitance value in the tuning matching network 150, so that the first impedance of the first antenna after switching is the same as the second impedance of the first antenna before switching. Under the condition that the frequency band of the transmission signal of the third antenna changes, the tuning matching network 150 can flexibly adjust the impedance, so that a plurality of sub-matching networks with fixed impedance are not required to be configured, and the circuit design is simplified.

Alternatively, the schemes of fig. 7-9 are applicable to scenarios where the first signal link 110 and the second signal link 120 operate in TDD mode, and the second signal link 120 may support a disconnect from antenna.

Fig. 10 is a schematic structural diagram of a radio frequency circuit of a terminal device according to another embodiment of the present application. The rf circuit of fig. 10 is similar to that of fig. 6, and the same contents are not repeated for brevity. Except that the matching network 150 in fig. 6 is replaced by a tuned matching network 150 in fig. 10. Therefore, if the frequency band of the transmission signal of the third antenna changes, the impedance of the tuning matching network 150 can be adjusted, so that the first impedance of the first antenna after switching is the same as the second impedance of the first antenna before switching.

Alternatively, the tuned matching network 150 of fig. 10 may be replaced by a plurality of fixed impedance sub-matching networks. For example, an SPMT switch may be provided between the combiner and the plurality of sub-matching networks, and the connected sub-matching network may be selected according to a change in a frequency band of a signal transmitted by the third antenna.

Optionally, the scheme in fig. 10 may be applicable to a scenario in which the first signal link 110 and the second signal link 120 are in a TDD operating mode, and may also be applicable to a scenario in which the first signal link 110 and the second signal link 120 are in an FDD operating mode.

Fig. 11 is a schematic structural diagram of a terminal device 100 according to another embodiment of the present application. As shown in fig. 11, the terminal device 100 may further include a main controller 190, and the main controller 190 may include, but is not limited to, various types of processors such as a System On Chip (SOC), an Application Processor (AP), or a general purpose processor. The radio frequency circuits in fig. 1 to 10 may belong to a radio frequency module 170 of a terminal device. An interface may exist between the main controller 190 and the rf module 170. The interface may include, for example, a Mobile Industry Processor Interface (MIPI) and/or a general purpose input/output (GPIO) interface. In this embodiment, the main controller 190 may send an instruction to the rf module 170 through the interface to instruct the switch switching unit 180 to switch.

Alternatively, for the scheme in fig. 7 or fig. 8, in the case that the sub-matching network 1501 supports multiple frequency bands, different instructions may be invoked by the main controller 190 according to different scenarios, so as to instruct the first antenna in the radio frequency module 170 to connect to different sub-matching networks 1501. The above-mentioned instructions may be sent to a corresponding switching unit or tuning matching network, for example, the switching unit 180, DPDT, SPMT, etc. in fig. 7 or fig. 8 or the matching network 150.

For the scheme of fig. 9 or fig. 10, in the case that the tuned matching network 150 supports multiple frequency bands, different instructions may be called by the main controller 190 according to different scenarios, and the instructions are sent to the corresponding switch unit or tuned matching network 150 to perform switch switching and adjust the impedance of the tuned matching network 150.

It should be understood that the above described scheme of adjusting the matching network and the switch control is by way of example only and not by way of limitation. Those skilled in the art will appreciate that the impedance of the matching network or the switching elements in the present application may be configured in other ways.

Fig. 12 is a schematic structural diagram of a terminal device 100 according to still another embodiment of the present application. The terminal device 100 may be adapted to the solutions of fig. 1 to 11. For convenience of explanation, fig. 12 shows only main components of the terminal device 100. As shown in fig. 12, the terminal device 100 includes a processor, a memory, a radio frequency circuit, an antenna, and an input-output means. The processor is mainly used for processing communication protocols and communication data, controlling the whole terminal equipment, executing software programs and processing data of the software programs, and the memory is mainly used for storing the software programs and the data, such as data used in the communication process. The radio frequency circuit is mainly used for converting baseband signals and radio frequency signals and processing the radio frequency signals. The radio frequency circuit and the antenna together, which may also be called a transceiver, are mainly used for transceiving radio frequency signals in the form of electromagnetic waves. Input and output devices such as touch screens, display screens, and keyboard lights are mainly used for receiving data input by users and outputting data to users.

For example, in the embodiment of the present application, an antenna and a radio frequency circuit having a transceiving function may be regarded as the transceiving unit 1001 of the terminal device 100, and a processor having a processing function may be regarded as the processing unit 1002 of the terminal device 100. Such as

As shown in fig. 12, the terminal device 1002 includes a transceiving unit 1001 and a processing unit 1002. The transceiving unit 1001 may also be referred to as a transceiver, a transceiving device, etc. Alternatively, a device for implementing a receiving function in the transceiving unit 1001 may be regarded as a receiving unit, and a device for implementing a transmitting function in the transceiving unit 1001 may be regarded as a transmitting unit, that is, the transceiving unit 1001 includes a receiving unit and a transmitting unit. For example, the receiving unit may also be referred to as a receiver, a receiving circuit, etc., and the sending unit may be referred to as a transmitter, a transmitting circuit, etc.

For example, the rf circuit of fig. 12 may include the rf module 170 of fig. 11. The processor of fig. 12 may include the main controller 190 of fig. 11.

When the terminal device 100 is powered on, the processor may read the software program in the storage unit, interpret and execute the data of the software program. When data needs to be sent through the antenna, the processor carries out baseband processing on the data to be sent and outputs baseband signals to the radio frequency circuit, and the radio frequency circuit carries out radio frequency processing on the baseband signals and sends the radio frequency signals to the outside through the antenna in the form of electromagnetic waves. When data is sent to the terminal equipment, the radio frequency circuit receives radio frequency signals through the antenna, converts the radio frequency signals into baseband signals and outputs the baseband signals to the processor, and the processor converts the baseband signals into the data and processes the data.

Those skilled in the art will appreciate that fig. 12 shows only one memory and processor for ease of illustration. In an actual terminal device, there may be multiple processors and memories. The memory may also be referred to as a storage medium or a storage device, and the like, which is not limited in this respect in the embodiment of the present invention.

As an alternative implementation manner, the processor may include a baseband processor and a central processing unit, where the baseband processor is mainly used to process a communication protocol and communication data, and the central processing unit is mainly used to control the whole terminal device, execute a software program, and process data of the software program. The processor in fig. 12 integrates the functions of the baseband processor and the central processing unit, and those skilled in the art will understand that the baseband processor and the central processing unit may also be independent processors, and are interconnected through a bus or the like. Those skilled in the art will appreciate that the terminal device may include a plurality of baseband processors to accommodate different network formats, the terminal device may include a plurality of central processors to enhance its processing capability, and various components of the terminal device may be connected by various buses. The baseband processor can also be expressed as a baseband processing circuit or a baseband processing chip. The central processing unit can also be expressed as a central processing circuit or a central processing chip. The function of processing the communication protocol and the communication data may be built in the processor, or may be stored in the storage unit in the form of a software program, and the processor executes the software program to realize the baseband processing function.

Fig. 13 is a flow chart illustrating a communication method 1300 according to an embodiment of the present application. The method may be performed by any of the terminal devices of fig. 1-12. The terminal equipment comprises a first antenna and a second antenna; a first signal link and a matching link, the matching link comprising a matching network; a switch switching unit comprising: a first input terminal connected to the first signal link; the second input end is connected with the matching link; a first output coupled to the first antenna and a second output coupled to the second antenna, the method 1300 comprising:

s1301, switching a first antenna from the first signal link to the matching link at a first time;

s1302, switching the second antenna to the first signal link at or after the first time; wherein the configuration of the matching network is such that: the difference value between a first impedance and a second impedance is smaller than a preset threshold value, the first impedance is an impedance between a first output end of the switch switching unit and the ground when the first antenna is switched to the matching link, and the second impedance is an impedance between the first output end of the switch switching unit and the ground when the first antenna is switched to the first signal link.

In some embodiments, the matching network is configured such that: the difference value between the first impedance and the second impedance is smaller than a preset threshold value, and the method comprises the following steps: the matching network is configured such that: the first impedance is the same as the second impedance.

In some embodiments, the terminal device further comprises a second signal link, the switch switching unit further comprises a third input connected to the second signal link, and the switching the second antenna to the first signal link at or after the first time comprises: switching the second antenna from the second signal link to the first signal link at or after the first time.

In some embodiments, the terminal device further includes a third antenna, and the matching network includes a plurality of sub-matching networks corresponding to a plurality of frequency bands of transmission signals of the third antenna; the switching the first antenna from the first signal link to the matching link at a first time comprises: and switching the first antenna to a first sub-matching network in the plurality of sub-matching networks at the first moment, wherein the first sub-matching network corresponds to the frequency band of the current transmission signal of the third antenna.

In some embodiments, the method further comprises a third antenna, the matching network being a tuned matching network, wherein the configuration of the matching network is such that: the difference value between the first impedance and the second impedance is smaller than a preset threshold value, and the method comprises the following steps: the impedance configuration of the tuned matching network is such that: the first impedance corresponds to a frequency band of a signal currently transmitted by the third antenna.

In some embodiments, the tuning matching network is configured to adjust an impedance of the tuning matching network before the first time, so that the first impedance corresponds to a frequency band of a signal currently transmitted by the third antenna.

In some embodiments, the matching link includes a second signal link connected to the first input terminal of the combiner, and a matching network connected to the second input terminal of the combiner, and the output terminal of the combiner is connected to the second input terminal of the switch switching unit.

Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.

It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described systems, apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.

In the several embodiments provided in the present application, it should be understood that the disclosed system, apparatus and method may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one logical division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.

The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In addition, functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit.

The functions, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present application or portions thereof that substantially contribute to the prior art may be embodied in the form of a software product stored in a storage medium and including instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present application. And the aforementioned storage medium includes: various media capable of storing program codes, such as a usb disk, a removable hard disk, a read-only memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk.

The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present application, and shall be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A terminal device, comprising:

a first antenna and a second antenna;

a first signal link and a matching link, the matching link comprising a matching network;

a switch switching unit comprising: a first input terminal connected to the first signal link; the second input end is connected with the matching link; the first output end is connected with the first antenna, and the second output end is connected with the second antenna;

the switch switching unit is used for switching the first antenna from the first signal link to the matching link at a first moment;

the switch switching unit is further configured to switch the second antenna to the first signal link at or after the first time;

wherein the configuration of the matching network is such that: the difference value between a first impedance and a second impedance is smaller than a preset threshold value, the first impedance is an impedance between a first output end of the switch switching unit and the ground when the first antenna is switched to the matching link, and the second impedance is an impedance between the first output end of the switch switching unit and the ground when the first antenna is switched to the first signal link.

2. The terminal device of claim 1, wherein the matching network is configured such that: the difference between the first impedance and the second impedance is smaller than a preset threshold, and the method comprises the following steps:

the matching network is configured such that: the first impedance is the same as the second impedance.

3. The terminal device according to claim 1 or 2, characterized in that the terminal device further comprises a second signal link, the switch switching unit further comprises a third input connected to the second signal link,

the switch switching unit is further configured to switch the second antenna to the first signal link at or after the first time, and includes:

the switch switching unit is configured to switch the second antenna from the second signal link to the first signal link at or after the first time.

4. The terminal device of claim 3, wherein the terminal device further comprises a third antenna, and wherein the matching network comprises a plurality of sub-matching networks corresponding to a plurality of frequency bands of transmission signals of the third antenna;

the switch switching unit is configured to switch the first antenna from the first signal link to the matching link at a first time, and includes:

the switch switching unit is configured to switch the first antenna to a first sub-matching network of the plurality of sub-matching networks at the first time, where the first sub-matching network corresponds to a frequency band of a current transmission signal of the third antenna.

5. The terminal device of claim 3, wherein the terminal device further comprises a third antenna, the matching network is a tuned matching network,

wherein the configuration of the matching network is such that: the difference value between the first impedance and the second impedance is smaller than a preset threshold value, and the method comprises the following steps:

the impedance configuration of the tuned matching network is such that: the first impedance corresponds to a frequency band of a signal currently transmitted by the third antenna.

6. The terminal device of claim 5, wherein the tuning matching network is configured to adjust an impedance of the tuning matching network prior to the first time such that the first impedance corresponds to a frequency band of a signal currently being transmitted by the third antenna.

7. The terminal device of claim 1, wherein the matching link comprises a second signal link and a matching network,

the second signal link is connected with the first input end of the combiner, the matching network is connected with the second input end of the combiner, and the output end of the combiner is connected with the second input end of the switch switching unit.

8. The terminal device of claim 7, wherein the terminal device further comprises a third antenna, the matching network is a tuned matching network,

9. A communication method is applied to terminal equipment, and is characterized in that the terminal equipment comprises a first antenna and a second antenna; a first signal link and a matching link, the matching link comprising a matching network; a switch switching unit comprising: a first input terminal connected to the first signal link; the second input end is connected with the matching link; a first output coupled to the first antenna and a second output coupled to the second antenna, the method comprising:

switching a first antenna from the first signal link to the matching link at a first time;

switching the second antenna to the first signal link at or after the first time;

10. The method of claim 9, wherein the matching network is configured such that: the difference value between the first impedance and the second impedance is smaller than a preset threshold value, and the method comprises the following steps:

11. The method according to claim 9 or 10, wherein the terminal device further comprises a second signal link, wherein the switch switching unit further comprises a third input connected to the second signal link,

the switching the second antenna to the first signal link at or after the first time comprises: switching the second antenna from the second signal link to the first signal link at or after the first time.

12. The method of claim 11, wherein the terminal device further comprises a third antenna, wherein the matching network comprises a plurality of sub-matching networks, and wherein the plurality of sub-matching networks correspond to a plurality of frequency bands of transmission signals of the third antenna;

the switching the first antenna from the first signal link to the matching link at a first time comprises: and switching the first antenna to a first sub-matching network in the plurality of sub-matching networks at the first moment, wherein the first sub-matching network corresponds to the frequency band of the current transmission signal of the third antenna.

13. The method of claim 11, further comprising a third antenna, the matching network being a tuned matching network,

14. The method of claim 13, wherein the tuning matching network is configured to adjust an impedance of the tuning matching network prior to the first time such that the first impedance corresponds to a frequency band of a signal currently being transmitted by the third antenna.

15. The method of claim 9, wherein the matching link comprises a second signal link and a matching network,

16. The method of claim 15, further comprising a third antenna, the matching network being a tuned matching network,

17. A terminal device, characterized in that the terminal device comprises:

a memory to store instructions;

a processor coupled to the memory for executing the memory-stored instructions, which when executed by the processor, causes the terminal device to perform the method of any of claims 9 to 16.

18. A chip comprising processing circuitry for performing the method of any of claims 9 to 16.