Radio frequency circuit, control method of radio frequency circuit, chip and electronic equipment

Abstract

The embodiment of the invention discloses a radio frequency circuit, a control method of the radio frequency circuit, a chip and electronic equipment, relates to the technical field of communication, and aims to adjust the frequency of radio frequency signal transmission of each antenna and reduce the coupling influence between the antennas while terminal equipment supports various communication systems. According to the specific scheme, the radio frequency circuit comprises a first tuning switch, a second tuning switch, a first control circuit and a second control circuit, the first tuning switch comprises a first selection end and a plurality of second selection ends, and the second tuning switch comprises a plurality of third selection ends. The plurality of second selection ends and the plurality of third selection ends are used for transmitting radio frequency signals corresponding to different communication systems. The fixed end of the first tuning switch is used for being coupled with an antenna, the first selection end of the first tuning switch is coupled with the fixed end of the second tuning switch, the controlled end of the first tuning switch is coupled with the output end of the first control circuit, and the controlled end of the second tuning switch is coupled with the output end of the second control circuit.

Description

Technical Field

[0001] The embodiments of the present application relate to the field of communication technology, and in particular to a radio frequency circuit, a control method for a radio frequency circuit, a chip, and an electronic device. Background Art

[0002] As the functions and communication systems supported by terminal devices increase, more and more antennas are included in the terminal devices. For example, the terminal devices may support communication systems such as satellite communication systems, short-range communication systems, and cellular communication systems.

[0003] As the number of antennas in terminal devices increases, the coupling effect between antennas becomes increasingly greater, which will lead to a decrease in the communication quality of the terminal devices. How to adjust the frequency of RF signals transmitted by each antenna while supporting multiple communication systems in the terminal devices and reduce the coupling effect between antennas has become an urgent problem to be solved. Summary of the invention

[0004] The embodiments of the present application provide a radio frequency circuit, a control method for the radio frequency circuit, a chip and an electronic device. When the terminal device supports multiple communication systems, the frequency of the radio frequency signal transmitted by each antenna can be adjusted to reduce the coupling effect between the antennas.

[0005] In order to achieve the above purpose, the embodiment of the present application adopts the following technical solution:

[0006] In a first aspect of an embodiment of the present application, a radio frequency circuit is provided, which supports communication of at least two communication systems, and the radio frequency circuit includes a first tuning switch, a second tuning switch, a first control circuit, and a second control circuit, wherein the first tuning switch includes a first selection end and multiple second selection ends, and the second tuning switch includes multiple third selection ends, and the multiple second selection ends and the multiple third selection ends are used to transmit radio frequency signals corresponding to different communication systems. Among them, the fixed end of the first tuning switch is used to couple with an antenna, the first selection end of the first tuning switch is coupled with the fixed end of the second tuning switch, the controlled end of the first tuning switch is coupled with the output end of the first control circuit, and the controlled end of the second tuning switch is coupled with the output end of the second control circuit.

[0007] Optionally, the at least two communication systems mentioned above may include at least two of a satellite communication system, a cellular communication system and a short-range communication system. The embodiment of the present application does not limit the specific types of the at least two communication systems.

[0008] Based on this solution, the first tuning switch includes a first selection end and multiple second selection ends, and the second tuning switch includes multiple third selection ends. By coupling the first selection end of the first tuning switch and the fixed end of the second tuning switch, the first tuning switch selects the selection end under the control of the first control circuit, and the second tuning switch selects the selection end under the control of the second control circuit, so that the multiple second selection ends and the multiple third selection ends can transmit radio frequency signals corresponding to different communication systems under the control of different control circuits, which can avoid the problem of control conflict when multiple communication systems control the same antenna, and when the radio frequency circuit is applied to the terminal device, each antenna is coupled with an radio frequency circuit, and the frequency of the radio frequency signal transmitted by each antenna can be adjusted to reduce the coupling effect between the antennas, which can improve the communication quality of the terminal device.

[0009] In combination with the first aspect, in a possible implementation, the communication system corresponding to the radio frequency signals transmitted by the multiple second selection ends is a cellular communication system or a satellite communication system, and the communication system corresponding to the radio frequency signals transmitted by the multiple third selection ends is a short-range communication system or a cellular communication system.

[0010] In combination with the first aspect, in a possible implementation, when multiple second selection terminals are used to transmit radio frequency signals; the first control circuit is used to send a first control signal, and the first tuning switch is used to receive the first control signal, and under the control of the first control signal, a path between a fixed end of the first tuning switch and a selected second selection terminal among the multiple second selection terminals is selected.

[0011] Optionally, the selected second selection end may be one of a plurality of second selection ends, or may be a plurality of the plurality of second selection ends, which is not limited in the embodiment of the present application.

[0012] In combination with the first aspect, in a possible implementation, when multiple third selection terminals are used to transmit radio frequency signals: the first control circuit is used to send a second control signal, the first tuning switch is used to receive the second control signal, and under the control of the second control signal, the path between the fixed terminal of the first tuning switch and the first selection terminal is selected. The second control circuit is used to send a third control signal, the second tuning switch is used to receive the third control signal, and under the control of the third control signal, the path between the fixed terminal of the second tuning switch and a selected third selection terminal among the multiple third selection terminals is selected.

[0013] Optionally, the selected third selection end may be one of multiple third selection ends, or may be multiple of multiple third selection ends, which is not limited in the embodiment of the present application.

[0014] In combination with the first aspect, in a possible implementation, the second tuning switch further includes a fourth selection terminal, the radio frequency circuit further includes a third tuning switch and a third control circuit, the third tuning switch includes a plurality of fifth selection terminals, and the plurality of fifth selection terminals, the plurality of second selection terminals, and the plurality of third selection terminals are used to transmit radio frequency signals corresponding to different communication systems. The fourth selection terminal of the second tuning switch is coupled to the fixed terminal of the third tuning switch, and the controlled terminal of the third tuning switch is coupled to the output terminal of the third control circuit.

[0015] In combination with the first aspect, in a possible implementation, when multiple fifth selection terminals are used to transmit radio frequency signals: the second control circuit is further used to send a fourth control signal, the second tuning switch is further used to receive the fourth control signal, and under the control of the fourth control signal, the path between the fixed terminal of the second tuning switch and the fourth selection terminal is selected. The third control circuit is used to send a fifth control signal, the third tuning switch is used to receive the fifth control signal, and under the control of the fifth control signal, the path between the fixed terminal of the third tuning switch and the selected fifth selection terminal among the multiple fifth selection terminals is selected.

[0016] Based on this solution, by setting a third tuning switch and a third control circuit, the RF circuit can support communications of at least three communication systems, and can avoid the problem of control conflict when the three communication systems control the same antenna. When the RF circuit is applied to a terminal device, each antenna is coupled to an RF circuit, and the frequency of the RF signal transmitted by each antenna can be adjusted to reduce the coupling effect between the antennas, thereby improving the communication quality of the terminal device.

[0017] In a second aspect of an embodiment of the present application, a control method for a radio frequency circuit is provided, wherein the radio frequency circuit supports communication of at least two communication systems, wherein the radio frequency circuit includes a first tuning switch, a second tuning switch, a first control circuit, and a second control circuit, wherein the first tuning switch includes a first selection terminal and a plurality of second selection terminals, and the second tuning switch includes a plurality of third selection terminals, wherein the plurality of second selection terminals and the plurality of third selection terminals are used to transmit radio frequency signals corresponding to different communication systems, wherein the fixed terminal of the first tuning switch is used to couple with an antenna, the first selection terminal of the first tuning switch is coupled with the fixed terminal of the second tuning switch, the controlled terminal of the first tuning switch is coupled with the output terminal of the first control circuit, and the controlled terminal of the second tuning switch is coupled with the output terminal of the second control circuit. When the plurality of second selection terminals are used to transmit radio frequency signals, the method includes: the first control circuit sends a first control signal, the first tuning switch receives the first control signal, and under the control of the first control signal, the path between the fixed terminal of the first tuning switch and the selected second selection terminal among the plurality of second selection terminals is selected.

[0018] In combination with the second aspect, in a possible implementation, the communication system corresponding to the radio frequency signals transmitted by the multiple second selection ends is a cellular communication system or a satellite communication system, and the communication system corresponding to the radio frequency signals transmitted by the multiple third selection ends is a short-range communication system or a cellular communication system.

[0019] In combination with the second aspect, in a possible implementation, when multiple third selection terminals are used to transmit radio frequency signals, the method further includes: the first control circuit sends a second control signal, the first tuning switch receives the second control signal, and under the control of the second control signal, the path between the fixed terminal of the first tuning switch and the first selection terminal is switched on. The second control circuit sends a third control signal, the second tuning switch receives the third control signal, and under the control of the third control signal, the path between the fixed terminal of the second tuning switch and a selected third selection terminal among the multiple third selection terminals is switched on.

[0020] In combination with the second aspect, in a possible implementation, the second tuning switch further includes a fourth selection terminal, the radio frequency circuit further includes a third tuning switch and a third control circuit, the third tuning switch includes a plurality of fifth selection terminals, the plurality of fifth selection terminals, the plurality of second selection terminals and the plurality of third selection terminals are used to transmit radio frequency signals corresponding to different communication systems, the fourth selection terminal of the second tuning switch is coupled with the fixed terminal of the third tuning switch, and the controlled terminal of the third tuning switch is coupled with the output terminal of the third control circuit. When the plurality of fifth selection terminals are used to transmit radio frequency signals, the method further includes: the second control circuit sends a fourth control signal, the second tuning switch receives the fourth control signal, and under the control of the fourth control signal, the path between the fixed terminal of the second tuning switch and the fourth selection terminal is selected. The third control circuit sends a fifth control signal, the third tuning switch receives the fifth control signal, and under the control of the fifth control signal, the path between the fixed terminal of the third tuning switch and the selected fifth selection terminal among the plurality of fifth selection terminals is selected.

[0021] According to a third aspect of an embodiment of the present application, a chip is provided, comprising a packaging substrate, and a radio frequency circuit arranged on the packaging substrate, wherein the radio frequency circuit is the radio frequency circuit described in the first aspect or any possible implementation method of the first aspect.

[0022] According to a fourth aspect of an embodiment of the present application, an electronic device is provided, comprising an antenna and a radio frequency circuit coupled to the antenna, wherein the radio frequency circuit is the radio frequency circuit described in the first aspect or any possible implementation of the first aspect.

[0023] Optionally, the electronic device may be a terminal device, and the types of the terminal device include mobile phones, tablet computers, PDAs (personal assistants) and wearable devices (smart watches, bracelets, digital glasses), etc., which are not limited in the embodiments of the present application.

[0024] The descriptions of the second to fourth aspects of the present application can refer to the detailed description of the first aspect; and the beneficial effects described in the second to fourth aspects can refer to the beneficial effect analysis of the first aspect, which will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a structural schematic diagram of a radio frequency circuit;

[0026] Figure 2 A schematic diagram of the structure of a radio frequency circuit provided in an embodiment of the present application;

[0027] Figure 3 A schematic diagram of the structure of a tuning switch provided in an embodiment of the present application;

[0028] Figure 4 A schematic diagram of the structure of another radio frequency circuit provided in an embodiment of the present application;

[0029] Figure 5 A schematic diagram of the structure of another radio frequency circuit provided in an embodiment of the present application;

[0030] Figure 6 A schematic diagram of a flow chart of a method for controlling a radio frequency circuit provided in an embodiment of the present application;

[0031] Figure 7 A schematic flow chart of another method for controlling a radio frequency circuit provided in an embodiment of the present application;

[0032] Figure 8 A flowchart of another method for controlling a radio frequency circuit provided in an embodiment of the present application;

[0033] Fig. 9 A schematic diagram of the structure of a chip provided in an embodiment of the present application;

[0034] Fig.10 A schematic diagram of the structure of an electronic device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0035] The following will discuss the making and use of each embodiment in detail. However, it should be understood that many applicable inventive concepts provided by this application can be implemented in a variety of specific environments. The specific embodiments discussed are only used to illustrate the specific ways to implement and use this description and this technology, and do not limit the scope of this application.

[0036] Unless defined otherwise, all technical and scientific terms used herein have the same meanings as commonly understood by one of ordinary skill in the art.

[0037] Various circuits or other components may be described or referred to as being "configured to" perform one or more tasks. In this case, "configured to" is used to imply structure by indicating that the circuit / component includes structure (e.g., circuitry) that performs the one or more tasks during operation. Thus, even when the specified circuit / component is not currently operational (e.g., not turned on), the circuit / component may be referred to as being configured to perform the task. Circuits / components used with the phrase "configured to" include hardware, such as circuits that perform an operation, etc.

[0038] The technical scheme in the embodiment of the present application will be described below in conjunction with the accompanying drawings in the embodiment of the present application. In the present application, "at least one" refers to one or more, and "multiple" refers to two or more. "And / or" describes the association relationship of the associated objects, indicating that there may be three relationships, for example, A and / or B, which can represent: A exists alone, A and B exist at the same time, and B exists alone, where A and B can be singular or plural. The character " / " generally indicates that the associated objects before and after are in an "or" relationship. "At least one of the following" or its similar expressions refers to any combination of these items, including any combination of single items or plural items. For example, at least one of a, b or c can represent: a, b, c, a and b, a and c, b and c or a, b and c, where a, b and c can be single or multiple. In addition, in the embodiment of the present application, the words "first", "second" and the like do not limit the quantity and order.

[0039] In this application, the words "exemplary" or "for example" are used to indicate examples, illustrations or descriptions. Any embodiment or design described as "exemplary" or "for example" in this application should not be interpreted as being more preferred or more advantageous than other embodiments or designs. Specifically, the use of the words "exemplary" or "for example" is intended to present the related concepts in a concrete way.

[0040] Before introducing the embodiments of the present application, the technical terms and background technologies involved in the present application are first introduced.

[0041] Tuning switch: a special switch that is coupled to the antenna and is used to change the impedance of the antenna so that the antenna can achieve better RF signal reception and transmission effects at a specific operating frequency.

[0042] Hall state: refers to the folding state of a folding screen mobile phone (referred to as a folding machine in the following embodiments of this application) detected by a Hall sensor. The Hall state includes an unfolded state and one of multiple folded states.

[0043] Antenna state: When the antenna is tuned to a certain resonant frequency, it is called an antenna state.

[0044] As terminal devices support more and more functions and communication systems, they include more and more antennas, and the coupling effect between antennas is getting bigger and bigger, which leads to the reduction of communication quality of terminal devices. How to adjust the frequency of RF signals transmitted by each antenna and reduce the coupling effect between antennas while supporting multiple communication systems has become an urgent problem to be solved.

[0045] For example, taking the terminal device as a folding machine, the folding machine includes a first body and a second body arranged on both sides of the rotating shaft. As the number of antennas in the folding machine increases, the antennas in the folding machine begin to be distributed in the first body and the second body. When the folding machine is in an unfolded state or a different folded state, the coupling influence between each antenna is different. Among them, when the folding machine is in a folded state, the coupling influence between the antenna in the first body and the antenna in the second body is large. In order to reduce the coupling influence between each antenna in the folding machine, when the folding machine supports a communication system, the communication system can configure each antenna to a different antenna state according to the Hall state of the folding machine, thereby reducing the coupling influence between each antenna. However, when the folding machine supports multiple communication systems, multiple communication systems control the same antenna, and there is a problem of control conflict. Therefore, how to avoid control conflicts, adjust the frequency of each antenna transmitting radio frequency signals, and reduce the coupling influence between each antenna has become an urgent problem to be solved.

[0046] like Figure 1 As shown, it is a schematic diagram of the structure of a radio frequency circuit 100. The radio frequency circuit 100 includes a first logic gate 110, a second logic gate 120, a third logic gate 130 and a tuning switch 140. The tuning switch 140 includes a plurality of first selection terminals and a plurality of second selection terminals. The plurality of first selection terminals are used to transmit radio frequency signals corresponding to the first communication system, and the plurality of second selection terminals are used to transmit radio frequency signals corresponding to the second communication system. The output terminal of the first logic gate 110 and the output terminal of the second logic gate 120 are coupled to the input terminal of the third logic gate 130, the output terminal of the third logic gate 130 is coupled to the controlled terminal of the tuning switch 140, and the fixed terminal of the tuning switch 140 is coupled to the antenna (antenna, ANT) 1.

[0047] The first logic gate 110 is used to receive a first control logic signal sent by the first communication system and a second control logic signal sent by the second communication system, perform a logic operation, and send a third control logic signal to the third logic gate 130. The second logic gate 120 is used to receive a first control logic signal sent by the first communication system and a second control logic signal sent by the second communication system, perform a logic operation, and send a fourth control logic signal to the third logic gate 130. The third logic gate 130 is used to generate and send a control signal according to the third control logic signal and the fourth logic signal. The tuning switch 140 is used to select a path between a fixed end of the tuning switch 140 and a selected first selection end among a plurality of first selection ends under the control of the control signal to transmit a radio frequency signal corresponding to the first communication system, or select a path between a fixed end of the tuning switch 140 and a selected second selection end among a plurality of second selection ends under the control of the control signal to transmit a radio frequency signal corresponding to the second communication system.

[0048] It can be understood that in the RF circuit 100, the control conflict problem can be avoided when the first communication system and the second communication system control the antenna state of the antenna ANT 1 through the first logic gate 110 to the third logic gate 130. When the terminal device includes multiple antennas and supports multiple communication systems, the terminal device can avoid the conflict problem when different communication systems control the same antenna by adopting the RF circuit 100, thereby adjusting the frequency of the RF signal transmitted by each antenna in the terminal device, reducing the coupling effect between the antennas, and improving the communication quality of the terminal device.

[0049] However, in the RF circuit 100, the first logic gate 110 to the third logic gate 130 are used to avoid the problem of control conflict when the first communication system and the second communication system control the antenna state of the antenna ANT 1, which will result in a larger board area of ​​the RF circuit 100, a higher implementation cost, and higher power consumption during operation.

[0050] In an antenna state control method, a communication system that controls an antenna is determined among multiple communication systems through an operating system of a terminal device. For example, taking the case where a terminal device supports a cellular communication system and a satellite communication system, and the two communication systems need to control the antenna state of the same antenna, the operating system of the terminal device can determine that the antenna is controlled by the cellular communication system, or that the antenna is controlled by the satellite communication system, based on information such as the current application scenario. However, this method requires support from the operating system of the terminal device, is relatively complex to implement, and is not compatible with different terminal devices.

[0051] In order to solve the above problems, an embodiment of the present application provides a radio frequency circuit, which cascades multiple tuning switches, and each tuning switch selects a different selection end under the control of a different control circuit, thereby avoiding the problem of control conflict when multiple communication systems control the same antenna. When the radio frequency circuit is applied to a terminal device, each antenna is coupled to an radio frequency circuit, and the frequency of the radio frequency signal transmitted by each antenna can be adjusted, thereby reducing the coupling effect between the antennas and improving the communication quality of the terminal device.

[0052] like Figure 2 As shown, it is a schematic diagram of the structure of a radio frequency circuit 200 provided in an embodiment of the present application. The radio frequency circuit 200 supports communication of at least two communication systems, and the embodiment of the present application does not limit how many communication systems the radio frequency circuit 200 specifically supports. The radio frequency circuit 200 includes a first tuning switch 210, a second tuning switch 220, a first control circuit 230 and a second control circuit 240. The first tuning switch 210 includes a first selection terminal and a plurality of second selection terminals, and the second tuning switch 220 includes a plurality of third selection terminals, and the plurality of second selection terminals and the plurality of third selection terminals are used to transmit radio frequency signals corresponding to different communication systems. The embodiment of the present application does not limit the specific number of the plurality of second selection terminals and the plurality of third selection terminals.

[0053] Among them, the fixed end of the first tuning switch 210 is used to couple with the antenna ANT 2, the first selection end of the first tuning switch 210 is coupled with the fixed end of the second tuning switch 220, the controlled end of the first tuning switch 210 is coupled with the output end of the first control circuit 230, and the controlled end of the second tuning switch 220 is coupled with the output end of the second control circuit 240.

[0054] In a possible embodiment, the at least two communication systems may be communication systems with similar frequency bands. Alternatively, the at least two communication systems may be: a high-order harmonic of a frequency band of a communication system, and two communication systems with a frequency band close to that of another communication system, which is not limited in the embodiment of the present application. Thus, the at least two communication systems may share the same antenna, and the number of antennas may be increased within the limited space of the terminal device, thereby improving the communication quality of the terminal device.

[0055] For example, among the at least two communication systems: one communication system may be a wireless fidelity 5th Generation (WIFI 5G) communication system in a short-range communication system; another communication system may be a cellular 5G communication system in a cellular communication system, or another communication system may be a satellite communication system.

[0056] Optionally, the at least two communication systems mentioned above may include at least two of a satellite communication system, a cellular communication system and a short-range communication system. The embodiment of the present application does not limit the specific types of the at least two communication systems.

[0057] In a possible embodiment, the communication systems corresponding to the radio frequency signals transmitted by the multiple second selection ends and the communication systems corresponding to the radio frequency signals transmitted by the multiple third selection ends can be pre-set by developers based on the performance requirements of the communication systems and the control priorities corresponding to the communication systems. The embodiment of the present application does not limit the specific types of the communication systems corresponding to the radio frequency signals transmitted by the multiple second selection ends and the specific types of the communication systems corresponding to the radio frequency signals transmitted by the multiple third selection ends.

[0058] In a possible embodiment, the communication system corresponding to the radio frequency signals transmitted by the multiple second selection ends is a cellular communication system or a satellite communication system, and the communication system corresponding to the radio frequency signals transmitted by the multiple third selection ends is a short-range communication system or a cellular communication system.

[0059] Exemplarily, when the communication system corresponding to the radio frequency signals transmitted by the multiple second selection terminals is a cellular communication system, the communication system corresponding to the radio frequency signals transmitted by the multiple third selection terminals may be a short-range communication system. When the communication system corresponding to the radio frequency signals transmitted by the multiple second selection terminals is a satellite communication system, the communication system corresponding to the radio frequency signals transmitted by the multiple third selection terminals is a short-range communication system, or the communication system corresponding to the radio frequency signals transmitted by the multiple third selection terminals is a cellular communication system.

[0060] It can be understood that the first control circuit 230 controls the selection end of the first tuning switch 210, and the second control circuit 240 controls the selection end of the second tuning switch 220. The fixed end of the second tuning switch 220 is coupled to the first selection end of the first tuning switch 210. Therefore, the priority of the first control circuit 230 is higher than the priority of the second control circuit 240, thereby avoiding the problem of control conflict when at least two communication systems control the same antenna.

[0061] In a possible embodiment, when multiple second selection ends of the first tuning switch 210 are used to transmit radio frequency signals: the first control circuit 230 is used to send a first control signal, and the first tuning switch 210 is used to receive the first control signal, and under the control of the first control signal, a path between a fixed end of the first tuning switch 210 and a selected second selection end among the multiple second selection ends is selected.

[0062] Optionally, the selected second selection end may be one of a plurality of second selection ends, or may be a plurality of the plurality of second selection ends, which is not limited in the embodiment of the present application.

[0063] For example, taking the example that the first tuning switch 210 includes four second selection terminals, the first tuning switch 210 can select one of the four second selection terminals, or can select three of the four second selection terminals, under the control of the first control signal.

[0064] In a possible embodiment, the first tuning switch 210 may be as follows: Figure 3 The single-pole multi-throw switch 310 shown in (a) of FIG. 1 may be, for example, Figure 3 The multi-pole multi-throw switch 320 shown in (b) of the present application is not limited in this embodiment. The single-pole multi-throw switch 310 includes a fixed end and multiple selection ends, and the fixed end can be coupled to the antenna ANT2. The multi-pole multi-throw switch 320 includes multiple fixed ends and multiple selection ends, and the multiple fixed ends can be coupled to the antenna ANT2.

[0065] Exemplarily, when the first tuning switch 210 is as follows Figure 3 When the single-pole multi-throw switch 310 shown in (a) of FIG. 1 is used, the first tuning switch 210 can, under the control of the first control signal, switch on the path between the fixed end of the first tuning switch and one of the second selection ends of the plurality of second selection ends. Figure 3 When the multi-pole multi-throw switch 320 shown in (b) is used, the first tuning switch 210 can, under the control of the first control signal, select the path between the fixed end of the first tuning switch and one or more second selection ends of the plurality of second selection ends. The specific process can refer to the prior art, and the embodiments of the present application will not be repeated here.

[0066] In a possible embodiment, when the multiple third selection terminals in the second tuning switch 220 are used to transmit radio frequency signals: the first control circuit 230 is used to send a second control signal, the first tuning switch 210 is used to receive the second control signal, and under the control of the second control signal, the path between the fixed terminal and the first selection terminal of the first tuning switch 210 is switched. The second control circuit 240 is used to send a third control signal, the second tuning switch 220 is used to receive the third control signal, and under the control of the third control signal, the path between the fixed terminal of the second tuning switch 220 and the selected third selection terminal among the multiple third selection terminals is switched.

[0067] Optionally, the selected third selection end may be one of multiple third selection ends, or may be multiple of multiple third selection ends, which is not limited in the embodiment of the present application.

[0068] For example, taking the example that the second tuning switch 220 includes four second selection terminals, the second tuning switch 220 can select one of the four third selection terminals, or three of the four third selection terminals, under the control of the third control signal.

[0069] In a possible embodiment, the second tuning switch 220 may be as follows: Figure 3 The single-pole multi-throw switch 310 shown in (a) of FIG. 1 may be, for example, Figure 3 The multi-pole multi-throw switch 320 shown in (b) is not limited to this embodiment of the present application.

[0070] It can be understood that the RF circuit 200 provided in the embodiment of the present application can control the first tuning switch 210 through the first control circuit 230 to select the path between the fixed end of the first tuning switch 210 and the selected second selection end among the multiple second selection ends, so as to transmit the RF signal corresponding to one communication system through the multiple second selection ends of the first tuning switch 210. The first tuning switch 210 can also be controlled by the first control circuit 230 to select the path between the fixed end of the first tuning switch 210 and the first selection end, and the second tuning switch 220 can be controlled by the second control circuit 240 to select the path between the fixed end of the second tuning switch 220 and the selected third selection end among the multiple third selection ends, so as to transmit the RF signal corresponding to another communication system through the multiple third selection ends of the second tuning switch 220. Thus, the problem of control conflict when multiple communication systems control antenna ANT 2 can be avoided, and different communication systems can transmit RF signals through antenna ANT 2. Moreover, when the RF circuit 200 is applied to a terminal device, each antenna is coupled with an RF circuit 200, and the frequency of the RF signal transmitted by each antenna can be adjusted, thereby reducing the coupling effect between the antennas and improving the communication quality of the terminal device.

[0071] For example, the RF circuit 200 provided in the embodiment of the present application is applied to a folding machine, and multiple second selection terminals are used to transmit RF signals corresponding to a cellular communication system, and multiple third selection terminals are used to transmit RF signals corresponding to a WIFI communication system. When the user uses the folding machine and is outdoors, the first control circuit 230 can control the first tuning switch 210 to transmit the RF signal corresponding to the cellular communication system through multiple second selection terminals. When the user uses the folding machine and is indoors, the first control circuit 230 can control the first tuning switch 210 to select the path between the fixed end and the first selection terminal, and the second control circuit 240 can control the second tuning switch 220 to select the path between the fixed end of the second tuning switch 220 and the third selection terminal selected from the multiple third selection terminals, so as to transmit the RF signal corresponding to the WIFI communication system through multiple third selection terminals. Thus, different communication systems can be supported according to the scenario in which the user uses the folding machine, and the frequency of the RF signal transmitted by each antenna can be adjusted, which can reduce the coupling effect between the antennas and improve the communication quality of the folding machine.

[0072] In a possible embodiment, when multiple third selection terminals in the second tuning switch 220 are not used to transmit RF signals, the second control circuit 240 can send a power-off control signal to the second tuning switch 220, and the second tuning switch 220 can receive the power-off control signal and stop operating under the control of the power-off control signal to reduce the power consumption of the RF circuit 200.

[0073] In a possible embodiment, the tuning switch and the corresponding control circuit are coupled via at least one of the following: a general-purpose input / output (GPIO) port and a mobile industry processor interface (MIPI), which is not limited in the embodiments of the present application.

[0074] In one possible example, Figure 4As shown, the RF circuit 200 also includes an RF front-end circuit 250, a plurality of first tuning circuits 260 and a plurality of second tuning circuits 270. The input and output ends of the RF front-end circuit 250 are coupled to the antenna ANT 2. One end of the plurality of first tuning circuits 260 is coupled to the plurality of second selection ends of the first tuning switch 210. One end of the plurality of second tuning circuits 270 is coupled to the plurality of third selection ends of the second tuning switch 220. The other ends of the plurality of first tuning circuits 260 and the other ends of the plurality of second tuning circuits 270 are coupled to the ground end (ground, GND). The RF front-end circuit 250 is used to filter, amplify and frequency convert the RF signal received or sent by the antenna ANT 2. The plurality of first tuning circuits 260 and the plurality of second tuning circuits 270 are used to adjust the frequency of the RF signal transmitted by the antenna ANT 2 when the corresponding selection ends are selected.

[0075] In the RF circuit 200 provided in the embodiment of the present application, the first tuning switch 210 includes a first selection end and a plurality of second selection ends, and the second tuning switch 220 includes a plurality of third selection ends. By coupling the first selection end of the first tuning switch 210 and the fixed end of the second tuning switch 220, the first tuning switch 210 selects the selection end under the control of the first control circuit 230, and the second tuning switch 220 selects the selection end under the control of the second control circuit 240, so that the plurality of second selection ends and the plurality of third selection ends can transmit RF signals corresponding to different communication systems under the control of different control circuits, which can avoid the problem of control conflict when multiple communication systems control the same antenna, and when the RF circuit 200 is applied to a terminal device, each antenna is coupled with a RF circuit 200, and the frequency of the RF signal transmitted by each antenna can be adjusted, reducing the coupling effect between each antenna, and improving the communication quality of the terminal device. At the same time, compared with the above-mentioned RF circuit 100, it is not necessary to use a logic gate with a large board area, which can reduce the cost and power consumption during operation. Compared with the above-mentioned antenna state control method, it does not require the support of the terminal device operating system and has better compatibility.

[0076] In a possible embodiment, Figure 5 As shown, the second tuning switch 220 also includes a fourth selection terminal, the RF circuit 200 also includes a third tuning switch 280 and a third control circuit 290, and the third tuning switch 280 includes multiple fifth selection terminals. The multiple fifth selection terminals and the multiple second selection terminals and multiple third selection terminals are used to transmit RF signals corresponding to different communication systems. The embodiment of the present application does not limit the specific number of the multiple fifth selection terminals. The fourth selection terminal of the second tuning switch 220 is coupled to the fixed terminal of the third tuning switch 280, and the controlled terminal of the third tuning switch 280 is coupled to the output terminal of the third control circuit 290.

[0077] In a possible embodiment, the communication systems corresponding to the radio frequency signals transmitted by the multiple second selection ends, the communication systems corresponding to the radio frequency signals transmitted by the multiple third selection ends, and the communication systems corresponding to the radio frequency signals transmitted by the multiple fifth selection ends can be pre-set by developers based on the performance requirements of the communication system and the control priority corresponding to the communication system. The embodiments of the present application do not limit this.

[0078] Exemplarily, when the communication system corresponding to the RF signals transmitted by multiple second selection ends is a cellular communication system, the communication system corresponding to the RF signals transmitted by multiple third selection ends may be a short-range communication system, and the communication system corresponding to the RF signals transmitted by multiple fifth selection ends may be a satellite communication system.

[0079] It can be understood that the second control circuit 240 controls the selection end of the second tuning switch 220, and the third control circuit 290 controls the selection end of the third tuning switch 280. The fixed end of the third tuning switch 280 is coupled to the fourth selection end of the second tuning switch 220. Therefore, the priority of the second control circuit 240 is higher than the priority of the third control circuit 290, thereby avoiding the problem of control conflict when at least two communication systems control the same antenna.

[0080] In a possible embodiment, when the multiple fifth selection terminals of the third tuning switch 280 are used to transmit radio frequency signals: the first control circuit 230 is used to send a second control signal, the first tuning switch 210 is used to receive the second control signal, and under the control of the second control signal, the path between the fixed terminal and the first selection terminal of the first tuning switch 210 is selected. The second control circuit 240 is also used to send a fourth control signal, the second tuning switch 220 is also used to receive the fourth control signal, and under the control of the fourth control signal, the path between the fixed terminal and the fourth selection terminal of the second tuning switch 220 is selected. The third control circuit 290 is used to send a fifth control signal, the third tuning switch 280 is used to receive the fifth control signal, and under the control of the fifth control signal, the path between the fixed terminal of the third tuning switch 280 and the selected fifth selection terminal among the multiple fifth selection terminals is selected.

[0081] Optionally, the selected fifth selection end may be one of a plurality of fifth selection ends, or may be a plurality of the plurality of fifth selection ends, which is not limited in the embodiment of the present application.

[0082] For example, taking the example that the third tuning switch 280 includes four fifth selection terminals, the third tuning switch 280 can select one of the four fifth selection terminals, or can select three of the four fifth selection terminals, under the control of the fifth control signal.

[0083] In a possible embodiment, the third tuning switch 280 may be as follows: Figure 3 The single-pole multi-throw switch 310 shown in (a) of FIG. 1 may be, for example, Figure 3 The multi-pole multi-throw switch 320 shown in (b) is not limited to this embodiment of the present application.

[0084] In a possible embodiment, when multiple fifth selection terminals in the third tuning switch 280 are not used to transmit RF signals, the third control circuit 290 can send a power-off control signal to the third tuning switch 280, and the third tuning switch 280 can receive the power-off control signal and stop operating under the control of the power-off control signal to reduce the power consumption of the RF circuit 200.

[0085] In a possible embodiment, the third tuning switch 280 and the third control circuit 290 are coupled via at least one of the following: a general-purpose input / output port and a mobile industry processor interface, which is not limited in the embodiment of the present application.

[0086] The RF circuit 200 provided in the embodiment of the present application controls the first tuning switch 210 through the first control circuit 230 to select the path between the fixed end and the first selection end of the first tuning switch 210, controls the second tuning switch 220 through the second control circuit 240 to select the path between the fixed end and the fourth selection end of the second tuning switch 220, and controls the third tuning switch 280 through the third control circuit 290 to select the path between the fixed end of the third tuning switch 280 and the fifth selection end selected from the plurality of fifth selection ends, so as to transmit the RF signal corresponding to another communication system through the plurality of fifth selection ends of the third tuning switch 280. At this time, the RF circuit 200 can support the communication of at least three communication systems. It can be understood that the RF circuit 200 can support the communication of more communication systems by cascading more tuning switches after the third tuning switch 280 and respectively setting a plurality of control circuits coupled to the plurality of tuning switches, and the embodiment of the present application will not be repeated here.

[0087] like Figure 6 , which is a flow chart of a control method of a radio frequency circuit provided in an embodiment of the present application. The control method of the radio frequency circuit can be applied to the radio frequency circuit 200 described above. When the multiple second selection terminals of the first tuning switch 210 are used to transmit radio frequency signals, the method includes steps S601-S602.

[0088] S601: The first control circuit 230 sends a first control signal.

[0089] S602: The first tuning switch 210 receives a first control signal, and under the control of the first control signal, switches on a path between a fixed end of the first tuning switch 210 and a selected second selection end among a plurality of second selection ends.

[0090] Optionally, the selected second selection end may be one of a plurality of second selection ends, or may be a plurality of the plurality of second selection ends, which is not limited in the embodiment of the present application.

[0091] In a possible embodiment, Figure 7 As shown, when the plurality of third selection terminals of the second tuning switch 220 are used to transmit radio frequency signals, the method further includes steps S701-S704.

[0092] S701 : The first control circuit 230 sends a second control signal.

[0093] S702 : The first tuning switch 210 receives a second control signal, and under the control of the second control signal, switches on a path between a fixed terminal and a first selection terminal of the first tuning switch 210 .

[0094] S703: The second control circuit 240 sends a third control signal.

[0095] S704 , the second tuning switch 220 receives a third control signal, and under the control of the third control signal, switches on a path between a fixed end of the second tuning switch 220 and a selected third selection end among a plurality of third selection ends.

[0096] Optionally, the selected third selection end may be one of multiple third selection ends, or may be multiple of multiple third selection ends, which is not limited in the embodiment of the present application.

[0097] The control method of the RF circuit provided in the embodiment of the present application controls the first tuning switch 210 to enable the selection end through the first control circuit 230, and controls the second tuning switch 220 to enable the selection end through the second control circuit 240, so that the multiple second selection ends of the first tuning switch 210 and the multiple third selection ends of the second tuning switch 220 can transmit RF signals corresponding to different communication systems under the control of different control circuits, which can avoid the problem of control conflict when multiple communication systems control the same antenna, and when the RF circuit 200 is applied to the terminal device, each antenna is coupled with an RF circuit 200, the frequency of the RF signal transmitted by each antenna can be adjusted, the coupling effect between the antennas can be reduced, and the communication quality of the terminal device can be improved.

[0098] In a possible embodiment, Figure 8As shown, when the plurality of fifth selection terminals of the third tuning switch 280 are used to transmit radio frequency signals, the method further includes steps S801-S806.

[0099] S801 : The first control circuit 230 sends a second control signal.

[0100] S802 : The first tuning switch 210 receives a second control signal, and under the control of the second control signal, switches on a path between a fixed terminal and a first selection terminal of the first tuning switch 210 .

[0101] S803: The second control circuit 240 sends a fourth control signal.

[0102] S804 , the second tuning switch 220 receives a fourth control signal, and under the control of the fourth control signal, switches on a path between the fixed end and the fourth selection end of the second tuning switch 220 .

[0103] S805 , the third control circuit 290 sends a fifth control signal.

[0104] S806: The third tuning switch 280 receives the fifth control signal, and under the control of the fifth control signal, switches on a path between the fixed end of the third tuning switch 280 and a selected fifth selection end among the plurality of fifth selection ends.

[0105] Optionally, the selected fifth selection end may be one of a plurality of fifth selection ends, or may be a plurality of the plurality of fifth selection ends, which is not limited in the embodiment of the present application.

[0106] The control method of the radio frequency circuit provided in the embodiment of the present application controls the selection end of the second tuning switch 220 through the second control circuit 240, and controls the selection end of the third tuning switch 280 through the third control circuit 290, so as to avoid the problem of control conflict when multiple communication systems control the same antenna. For specific analysis, please refer to the above description, and the embodiment of the present application will not be repeated here. And when the radio frequency circuit 200 is applied to the terminal device, each antenna is coupled with a radio frequency circuit 200, and the frequency of the radio frequency signal transmitted by each antenna can be adjusted, reducing the coupling effect between each antenna, and improving the communication quality of the terminal device.

[0107] like Fig. 9 FIG. 1 is a schematic diagram of a structure of a chip 900 provided in an embodiment of the present application. The chip 900 includes a packaging substrate 910 and a radio frequency circuit 920 disposed on the packaging substrate 910. The structure of the radio frequency circuit 920 is as follows: Figure 2-Figure 5 The structure of the radio frequency circuit 200 shown in any of the figures.

[0108] Based on this, Fig.10As shown, the embodiment of the present application further provides an electronic device 1000, the electronic device 1000 includes an antenna 1100, and a radio frequency circuit 1200 coupled to the antenna 1100, the structure of the radio frequency circuit 1200 is as follows Figure 2-Figure 5 The structure of the radio frequency circuit 200 shown in any of the figures.

[0109] Optionally, the electronic device 1000 may be a terminal device, and the types of the terminal device include mobile phones, tablet computers, PDAs (personal assistants) and wearable devices (smart watches, bracelets, digital glasses), etc., which are not limited in the embodiments of the present application.

[0110] The relevant description of the RF circuit 200 provided above can be referred to the control method of the RF circuit, the chip 900 and the electronic device 1000, and the embodiments of the present application are not repeated here. The chip 900 and the electronic device 1000 provided in the embodiments of the present application both include the functions of the RF circuit 200 in the above embodiments, and thus can achieve the same effect as the above RF circuit 200.

[0111] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions within the technical scope disclosed in the present application should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A radio frequency circuit, characterized in that: The radio frequency circuit supports communication of at least two communication systems, and the radio frequency circuit includes a first tuning switch, a second tuning switch, a first control circuit and a second control circuit, the first tuning switch includes a first selection end and a plurality of second selection ends, the second tuning switch includes a plurality of third selection ends, and the plurality of second selection ends and the plurality of third selection ends are used to transmit radio frequency signals corresponding to different communication systems; The fixed end of the first tuning switch is used to couple with the antenna, the first selection end of the first tuning switch is coupled with the fixed end of the second tuning switch, the controlled end of the first tuning switch is coupled with the output end of the first control circuit, and the controlled end of the second tuning switch is coupled with the output end of the second control circuit.

2. The radio frequency circuit according to claim 1, characterized in that: The communication system corresponding to the radio frequency signals transmitted by the multiple second selection ends is a cellular communication system or a satellite communication system, and the communication system corresponding to the radio frequency signals transmitted by the multiple third selection ends is a short-range communication system or the cellular communication system.

3. The radio frequency circuit according to claim 1 or 2, characterized in that: When the plurality of second selection terminals are used to transmit radio frequency signals; The first control circuit is used to send a first control signal; The first tuning switch is used to receive the first control signal, and under the control of the first control signal, to select a path between a fixed end of the first tuning switch and a selected second selection end among the plurality of second selection ends.

4. The radio frequency circuit according to any one of claims 1 to 3, characterized in that: When the plurality of third selection terminals are used to transmit radio frequency signals; The first control circuit is used to send a second control signal; The first tuning switch is used to receive the second control signal, and under the control of the second control signal, to switch on a path between a fixed end of the first tuning switch and the first selection end; The second control circuit is used to send a third control signal; The second tuning switch is used to receive the third control signal, and under the control of the third control signal, to select a path between the fixed end of the second tuning switch and a selected third selection end among the plurality of third selection ends.

5. The radio frequency circuit according to claim 4, characterized in that: The second tuning switch further includes a fourth selection terminal, the radio frequency circuit further includes a third tuning switch and a third control circuit, the third tuning switch includes a plurality of fifth selection terminals, and the plurality of fifth selection terminals, the plurality of second selection terminals and the plurality of third selection terminals are used to transmit radio frequency signals corresponding to different communication systems; The fourth selection terminal of the second tuning switch is coupled to the fixed terminal of the third tuning switch, and the controlled terminal of the third tuning switch is coupled to the output terminal of the third control circuit.

6. The radio frequency circuit according to claim 5, characterized in that: When the plurality of fifth selection terminals are used to transmit radio frequency signals; The second control circuit is further used to send a fourth control signal; The second tuning switch is further used to receive the fourth control signal, and under the control of the fourth control signal, to switch on the path between the fixed end of the second tuning switch and the fourth selection end; The third control circuit is used to send a fifth control signal; The third tuning switch is used to receive the fifth control signal, and under the control of the fifth control signal, to select a path between a fixed end of the third tuning switch and a selected fifth selection end among the plurality of fifth selection ends.

7. A method for controlling a radio frequency circuit, characterized in that: The radio frequency circuit supports communication of at least two communication systems, and the radio frequency circuit includes a first tuning switch, a second tuning switch, a first control circuit, and a second control circuit. The first tuning switch includes a first selection end and multiple second selection ends, and the second tuning switch includes multiple third selection ends. The multiple second selection ends and the multiple third selection ends are used to transmit radio frequency signals corresponding to different communication systems. The fixed end of the first tuning switch is used to couple with an antenna, the first selection end of the first tuning switch is coupled with the fixed end of the second tuning switch, the controlled end of the first tuning switch is coupled with the output end of the first control circuit, and the controlled end of the second tuning switch is coupled with the output end of the second control circuit. When the multiple second selection ends are used to transmit radio frequency signals, the method includes: The first control circuit sends a first control signal; The first tuning switch receives the first control signal, and under the control of the first control signal, switches on a path between a fixed end of the first tuning switch and a selected second selection end among the plurality of second selection ends.

8. The method according to claim 7, characterized in that The communication system corresponding to the radio frequency signals transmitted by the multiple second selection ends is a cellular communication system or a satellite communication system, and the communication system corresponding to the radio frequency signals transmitted by the multiple third selection ends is a short-range communication system or the cellular communication system.

9. The method according to claim 7 or 8, characterized in that: When the plurality of third selection terminals are used to transmit radio frequency signals, the method further includes: The first control circuit sends a second control signal; The first tuning switch receives the second control signal, and under the control of the second control signal, switches on a path between a fixed end and the first selection end of the first tuning switch; The second control circuit sends a third control signal; The second tuning switch receives the third control signal, and under the control of the third control signal, switches on a path between a fixed end of the second tuning switch and a selected third selection end among the plurality of third selection ends.

10. The method according to claim 9, characterized in that The second tuning switch further includes a fourth selection terminal, the radio frequency circuit further includes a third tuning switch and a third control circuit, the third tuning switch includes a plurality of fifth selection terminals, the plurality of fifth selection terminals, the plurality of second selection terminals and the plurality of third selection terminals are used to transmit radio frequency signals corresponding to different communication systems, the fourth selection terminal of the second tuning switch is coupled to the fixed terminal of the third tuning switch, the controlled terminal of the third tuning switch is coupled to the output terminal of the third control circuit, and when the plurality of fifth selection terminals are used to transmit radio frequency signals, the method further includes: The second control circuit sends a fourth control signal; The second tuning switch receives the fourth control signal, and under the control of the fourth control signal, switches on a path between the fixed end of the second tuning switch and the fourth selection end; The third control circuit sends a fifth control signal; The third tuning switch receives the fifth control signal, and under the control of the fifth control signal, switches on a path between a fixed end of the third tuning switch and a selected fifth selection end among the plurality of fifth selection ends.

11. A chip, characterized in that: The chip includes a packaging substrate and a radio frequency circuit arranged on the packaging substrate, and the radio frequency circuit is the radio frequency circuit according to any one of claims 1 to 6.

12. An electronic device, characterized in that: The electronic device includes an antenna and a radio frequency circuit coupled to the antenna, and the radio frequency circuit is the radio frequency circuit according to any one of claims 1 to 6.

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