Radio frequency system, antenna switching method and electronic device

Abstract

A radio frequency system, an antenna switching method and an electronic device, the radio frequency system comprising a radio frequency transceiver, a first transceiver path, a second transceiver path, a first control circuit, a second control circuit and a switching control circuit, wherein: the first control circuit is configured to transmit a first control signal, wherein the first control signal is used to enable the transceiver function of the first transceiver path and the second transceiver path; the second control circuit is configured to transmit a second control signal, wherein the second control signal is used to enable the antenna switching operation; the switching control circuit is connected to the first control circuit and the second control circuit, and is used to receive the first control signal and the second control signal, and according to the first control signal and the second control signal, control one of the first transceiver path and the second transceiver path to switch and connect with one of the first antenna and the second antenna; the scheme can avoid the influence of the reflection of the transmission signal on the power amplifier caused by the instantaneous open circuit when the antenna is switched.

Description

Technical Field

[0001] The present application discloses but is not limited to wireless communication technology, and more specifically, to a radio frequency system, an antenna switching method and an electronic device. Background Art

[0002] With the popularization of IoT technology, users are using mobile phones to connect to routers, home appliances, True Wireless Stereo (TWS) headphones, watches, and other scenarios. However, users use mobile phones in many postures and scenarios, which means that a single antenna cannot meet user needs. For example, when holding the phone horizontally, the upper and lower antennas are held, and when holding the phone vertically, the middle and lower antennas are held. Therefore, various antenna switching technologies have been proposed to meet the needs of different scenarios. However, the use of antenna switching technology also brings corresponding problems. Summary of the invention

[0003] The following is a summary of the subject matter described in detail herein. This summary is not intended to limit the scope of the claims.

[0004] The present application provides a radio frequency system, including:

[0005] RF transceiver;

[0006] a first transceiver path, one end of which is connected to the radio frequency transceiver, and the other end of which is switchably connected to a first antenna or a second antenna, and the first transceiver path is used for transmitting and receiving a first radio frequency signal;

[0007] a second transceiver path, one end of which is connected to the radio frequency transceiver, and the other end of which is switchably connected to the first antenna or the second antenna, and the second transceiver path is used for transmitting and receiving a second radio frequency signal;

[0008] A first control circuit is connected to the first transceiver path and the second transceiver path, and is configured to transmit a first control signal, wherein the first control signal is used to enable the transceiver function of the first transceiver path and the second transceiver path;

[0009] A second control circuit is connected to the first transceiver path and the second transceiver path and is configured to transmit a second control signal, wherein the second control signal is used to enable an antenna switching operation;

[0010] A switching control circuit is connected to the first control circuit and the second control circuit, and is used to receive the first control signal and the second control signal, and control one of the first transceiver path and the second transceiver path to switch and connect with one of the first antenna and the second antenna according to the first control signal and the second control signal.

[0011] The embodiment of the present application further provides an antenna switching method, which is applied to the radio frequency system, including:

[0012] Receiving the first control signal and the second control signal; wherein the first control signal is used to enable the transceiver function of the first transceiver path and the second transceiver path, and the second control signal is used to enable the antenna switching operation;

[0013] If the second control signal requests an antenna switching operation, determining whether the first transceiver path and the second transceiver path are performing a radio frequency signal transmission operation according to the first control signal;

[0014] If neither the first transceiver path nor the second transceiver path performs a radio frequency signal transmission operation, an antenna switching operation is performed.

[0015] An embodiment of the present application also provides an electronic device, comprising the radio frequency system as described in any embodiment of the present application.

[0016] An embodiment of the present application further provides a computer-readable storage medium, wherein the computer-readable storage medium stores a computer program, and the computer program is the antenna switching method described above when executed by a processor.

[0017] Compared with the related art in which an antenna switching operation is performed upon receiving an antenna switching operation request, the solution provided in the present application, when receiving a second control signal requesting antenna switching, also determines the transceiver status of the first transceiver path and the second transceiver path according to the first control signal to judge whether the switching can be performed, so that the antenna switching and the RF transmission state do not occur at the same time, ensuring that no reflected signal enters the PA, thereby solving the problem of transient open circuit burning of the PA due to antenna switching.

[0018] Other aspects will be apparent upon reading and understanding the drawings and detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings are used to provide an understanding of the embodiments of the present disclosure and constitute a part of the specification. Together with the embodiments of the present disclosure, they are used to explain the technical solutions of the present disclosure and do not constitute a limitation to the technical solutions of the present disclosure.

[0020] Figure 1A is a module diagram of a radio frequency system;

[0021] Figure 1B for Figure 1A A circuit diagram of the radio frequency system shown;

[0022] Figure 2 A first schematic diagram of a radio frequency system provided in an embodiment of the present application;

[0023] Figure 3 for Figure 2 a second schematic diagram of the radio frequency system shown;

[0024] Figure 4 for Figure 2 a third schematic diagram of the radio frequency system shown;

[0025] Figure 5 for Figure 4 The application diagram of the radio frequency system shown;

[0026] Figure 6 for Figure 2 A fourth schematic diagram of the radio frequency system shown;

[0027] Figure 7 for Figure 6 The application diagram of the radio frequency system shown;

[0028] Figure 8 A flowchart of an antenna switching method provided in an embodiment of the present application;

[0029] Fig. 9 is a signal timing diagram provided by an embodiment of the present application;

[0030] Fig.10 Another signal timing diagram provided in an embodiment of the present application;

[0031] Fig.11 A module diagram of an antenna switching device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0032] The present disclosure describes multiple embodiments, but the description is exemplary rather than restrictive, and it is obvious to those skilled in the art that there may be more embodiments and implementations within the scope of the embodiments described in the present disclosure.

[0033] In the description of the present disclosure, the words "exemplary" or "for example" are used to indicate examples, illustrations or explanations. Any embodiment described as "exemplary" or "for example" in the present disclosure should not be interpreted as being more preferred or advantageous than other embodiments. "And / or" in this article is a description of the association relationship of associated objects, indicating that there may be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. "Multiple" means two or more than two. In addition, in order to facilitate the clear description of the technical solutions of the embodiments of the present disclosure, the words "first" and "second" are used to distinguish between the same items or similar items with basically the same functions and effects. Those skilled in the art can understand that the words "first" and "second" do not limit the quantity and execution order, and the words "first" and "second" do not limit them to be necessarily different. In the description of the present disclosure, the connections between the radio frequency devices are all electrical connections, which can be direct connections or indirect connections.

[0034] When describing representative exemplary embodiments, the specification may have presented the method and / or process as a specific sequence of steps. However, to the extent that the method or process does not rely on the specific order of the steps described herein, the method or process should not be limited to the steps in the specific order described. As will be appreciated by those of ordinary skill in the art, other orders of steps are also possible. Therefore, the specific order of the steps set forth in the specification should not be interpreted as a limitation on the claims. In addition, the claims for the method and / or process should not be limited to the steps that are performed in the order written, and those skilled in the art can easily understand that these orders can be changed and still remain within the spirit and scope of the disclosed embodiments.

[0035] A radio frequency system that adds a switch between the front-end modules (FEM) and the antenna to enable intelligent selection of the antenna. Figure 1A As shown, it includes a radio frequency transceiver 21, a first transceiver path 25, a switch 27, a first antenna 29 and a second antenna 31, wherein: one end of the first transceiver path 25 is connected to the radio frequency transceiver 21, and the other end is connected to the switch 27; the switch 27 is configured to switchably connect the first transceiver path 25 to the first antenna 29 or the second antenna 31. The switching control signal used to control the switching of the switch 27 can come from an application processor (AP) or the radio frequency transceiver 21, etc.

[0036] The first radio frequency signal transmitted by the above-mentioned first transceiver path may be a Bluetooth (BT) signal or a Wi-Fi signal. It may also include two signals such as the first transceiver path used to transmit Bluetooth signals and Wi-Fi signals in time-sharing. This embodiment sets at least two antennas for transmitting and receiving the first radio frequency signal. The two antennas can be respectively set at both ends of the electronic device, or one is set in the middle of the electronic device and the other is set on one side of the electronic device, which can better adapt to more scenarios. When the position of one of the antennas is held or touched, it can switch to the other antenna for communication, thereby improving the overall signal transmission quality.

[0037] However, this embodiment controls the switching switch 27 to implement antenna switching in a hard switching manner. The switching switch 27 is in an open circuit state during the switching transient state (~500ns). If the first RF signal is in a transmitting state at this time, the first RF signal will be completely reflected back when it reaches the switching switch 27, which may affect the RF devices inside the front-end module, such as the power amplifier (PA), such as shortening the service life of the PA or burning it out.

[0038] Figure 1B In the illustrated embodiment, it is a circuit diagram of a radio frequency system shared by Bluetooth and Wi-Fi operating in the 2.4G frequency band (ie, Wi-Fi 2.4G) on a mobile phone. Figure 1B In the IEEE 802.11ac wireless communication protocol, Wi-Fi and BT use the time division duplex (TDD) working mechanism and share the receiving and transmitting paths. A communication cycle includes BT working time and Wi-Fi working time. The BT working time and Wi-Fi working time are each divided into multiple receiving and transmitting cycles. Each receiving and transmitting cycle includes one transmitting time and one receiving time.

[0039] like Figure 1B As shown, the RF transceivers of BT and Wi-Fi are integrated in the WCN IC in the figure, namely the Wireless Communication Network (WCN) chip. The RF transceiver is provided with a signal interface shared by BT and Wi-Fi, including two transmitting interfaces (Wi-Fi & BT TX0 and Wi-Fi & BT TX1) and two receiving interfaces (Wi-Fi & BT RX0 and Wi-Fi & BT RX0). The first group of transmitting interfaces and receiving interfaces (Wi-Fi & BT TX0 and Wi-Fi & BT RX0) are connected to the first transmitting and receiving path shared by BT and Wi-Fi, and the second group of transmitting interfaces and receiving interfaces (Wi-Fi & BT TX1 and Wi-Fi & BT RX1) are connected to the second transmitting and receiving path shared by BT and Wi-Fi.

[0040] As shown in the figure, the first transceiver path and the second transceiver path are integrated in the front-end module (i.e., the Wi-Fi&BT FEM chip in the figure). The first transceiver path includes a first transmitting path and a first receiving path shared by Bluetooth and Wi-Fi. Among them, the first transmitting path includes a power amplifier PA and a connector CPL0, the first receiving path includes a low noise amplifier (LowNoise Amplifier) ​​LNA and a bypass switch BYPASS, the first transmitting path is connected to the transmitting interface Wi-Fi&BT TX0 on the RF transceiver through the first signal transmitting terminal TX0, and the first receiving path is connected to the receiving interface Wi-Fi&BT RX0 on the RF transceiver through the first signal receiving terminal RX0. The first transmitting path and the first receiving path also share a switching switch, namely a single-pole double-throw switch SPDT0. The first end of SPDT0 (also referred to as the common end) is connected to the antenna port ATN_0 of the chip.

[0041] PA is used to amplify the corresponding transmitted RF signal to increase the transmit power, LNA is used to amplify the received RF signal to improve the receiving sensitivity, and CPL0 is used to feed back part of the PA's transmit power to the RF transceiver through port CPLR0 to achieve power control. SPDT0 connects these two branches to the antenna port ATN_0 in a time-division manner to achieve Bluetooth and Wi-Fi signal transmission and reception. The first transceiver path also includes some capacitors and resistors, which will not be repeated here.

[0042] The antenna port ATN_0 is connected to the first end of the switch SPDT, which may be a single-pole double-throw switch. One of the two second ends of SPDT is connected to the first antenna ANT0 through the first filter FLT0, and the other is connected to the second antenna ANT1 through the second filter FLT1. The AP may send a switching control signal to the switch SPDT so that the first transceiver path is connected to ANT0 or ANT1.

[0043] The structure of the second transceiver path is the same as that of the first transceiver path, but the antenna port ATN_1 is connected to the third antenna ANT2 through the third filter FLT2 without passing through the switching switch.

[0044] The Wi-Fi&BT FEM chip is also provided with a power supply terminal VCC, and some enable terminals connected to corresponding interfaces of the WCN IC, such as a Bluetooth enable terminal BTEN, a low noise amplifier enable terminal LNAEN and a power amplifier enable terminal PAEN, which are connected to corresponding control ports of the WCN IC.

[0045] In this embodiment, the transmitting path and receiving path of BT and Wi-Fi are shared, but in other embodiments, the transmitting path of BT and Wi-Fi can be independent, the receiving path can be shared, or the transmitting path and receiving path of BT and Wi-Fi can be set independently.

[0046] This embodiment exists Figure 1A The same problem as the embodiment shown is that in the SPDT switching transient state (~500ns), the SPDT is in an open circuit state. At this time, Wi-Fi or BT may be in a signal transmission (Transmit, TX) state. The signal reaches the SPDT and is reflected back, which has an adverse effect on the PA inside the FEM.

[0047] Figure 2 This is a first schematic diagram of a radio frequency system provided in an embodiment of the present application. Figure 2 As shown, the radio frequency system includes a radio frequency transceiver, a first transceiver path, a second transceiver path, a first control circuit, a second control circuit and a switching control circuit, wherein:

[0048] The above-mentioned RF transceiver can be implemented with a wireless communication network (Wireless Communication Network, WCN) chip, which is configured to complete the conversion and reverse conversion process of digital signals to RF signals. After the digital signal encoded by the processor (not shown) is sent to the RF transceiver, it is packaged into frames, converted from digital to analog signals, modulated, up-converted, etc., and finally generates a corresponding RF signal. Alternatively, the received RF signal undergoes a series of reverse processes in the RF transceiver, such as down-conversion, demodulation, conversion of analog to digital signals, decapsulation, etc., and then is sent to the processor for decoding and subsequent signal processing.

[0049] A first transceiver path, one end of the first transceiver path is connected to the radio frequency transceiver, the other end of the first transceiver path is switchably connected to the first antenna or the second antenna, and the first transceiver path is used for transmitting and receiving a first radio frequency signal;

[0050] Specifically, the first transceiver path receives the first RF signal from the RF transceiver and transmits it through the first antenna or the second antenna; and receives the first RF signal from the first antenna or the second antenna and sends it to the RF transceiver.

[0051] a second transceiver path, one end of the second transceiver path is connected to the radio frequency transceiver, the other end of the second transceiver path is switchably connected to the first antenna or the second antenna, and the second transceiver path is used for transmitting and receiving a second radio frequency signal;

[0052] Specifically, the second transceiver path receives the second RF signal from the RF transceiver and transmits it through the first antenna or the second antenna; and receives the second RF signal from the first antenna or the second antenna and sends it to the RF transceiver.

[0053] Furthermore, the above-mentioned first transceiver path and the second transceiver path can be implemented using an RF front-end module chip, which is configured to amplify the transmitted RF signal to increase the transmission power and increase the transmission distance. It can also be used to connect and feed back part of the transmission power to the RF transceiver to achieve power control; and, amplify the received RF signal to increase the receiving sensitivity, thereby increasing the receiving distance.

[0054] and Figure 1A The structure shown is different in that Figure 2 The radio frequency system shown is additionally provided with a first control circuit, a second control circuit and a switching control circuit, wherein:

[0055] A first control circuit is connected to the first transceiver path and the second transceiver path, and is configured to transmit a first control signal, wherein the first control signal is used to enable the transceiver function of the first transceiver path and the second transceiver path;

[0056] Specifically, the first control circuit is connected to the first transceiver path and the second transceiver path through the interface of the RF front-end module chip, thereby outputting the first control signal to enable the transceiver function of the first transceiver path and the second transceiver path.

[0057] A second control circuit is connected to the first transceiver path and the second transceiver path and is configured to transmit a second control signal, wherein the second control signal is used to enable an antenna switching operation;

[0058] Specifically, the second control circuit is connected to the first transceiver path and the second transceiver path through the interface of the RF front-end module chip, thereby achieving connection with the first transceiver path and the second transceiver path, and outputting a second control signal, wherein the second control signal is used to enable antenna switching operation, that is, controlling the antenna used by the first transceiver path and the second transceiver path to switch from one antenna to another antenna, thereby achieving the purpose of switching the antenna used by the first transceiver path and the second transceiver path.

[0059] The switching control circuit determines whether to perform an antenna switching operation according to a first control signal output by the first control circuit and a second control signal output by the second control circuit.

[0060] Specifically, the switching control circuit is connected to the first control circuit and the second control circuit, and is used to receive the first control signal and the second control signal, and control one of the first transceiver path and the second transceiver path to switch and connect with one of the first antenna and the second antenna according to the first control signal and the second control signal.

[0061] Compared with the related art in which an antenna switching operation is performed upon receiving an antenna switching operation request, the RF system provided in the present application, when receiving a second control signal requesting antenna switching, also determines the transceiver status of the first transceiver path and the second transceiver path according to the first control signal to judge whether the switching can be performed, so that the antenna switching and the RF transmission state do not occur at the same time, ensuring that no reflected signal enters the PA, thereby solving the problem of transient open circuit burning of the PA due to antenna switching.

[0062] The first antenna and the second antenna are used to convert the conducted signal into a wireless signal and send it into the air to achieve wireless long-distance transmission. The first antenna or the second antenna can be used as part of the radio frequency system of this embodiment, or can be partially or completely set independently.

[0063] Figure 3 for Figure 2 A second schematic diagram of a radio frequency system is shown. Figure 3 As shown, the switching control circuit includes a state conversion module and a switch device; wherein:

[0064] The state conversion module outputs a third control signal according to the first control signal and the second control signal. The third control module is used to control the conduction state of the switch device.

[0065] At least one of the first control signal, the second control signal and the third control signal may use high or low levels to represent different states.

[0066] Specifically, a first input end of the state conversion module is connected to the first control circuit, a second input end of the state conversion module is connected to the second control circuit, and an output end of the state conversion module is connected to the control end of the switch device, and is used to receive the first control signal and the second control signal, and output a third control signal according to the first control signal and the second control signal;

[0067] Furthermore, after receiving the first control signal and the second control signal, if the second control signal requests an antenna switching operation, the state transition module determines, based on the first control signal, whether the first transceiver path and the second transceiver path are performing a radio frequency signal transmission operation; if neither the first transceiver path nor the second transceiver path is performing a radio frequency signal transmission operation, a third control signal for performing the antenna switching operation is output.

[0068] The switch device is configured to control one of the first transceiver path and the second transceiver path and one of the first antenna and the second antenna to be in a conductive state according to a third control signal.

[0069] Specifically, the input end of the switch device is connected to the first transceiver path or the second transceiver path, the first output end of the switch device is connected to the first antenna, and the second output end of the switch device is connected to the second antenna.

[0070] The above-mentioned switch device can be implemented by a single-pole double-throw SPDT switch. In other embodiments, it can also be other types of switches, such as a single-pole three-throw SP3T switch, a single-pole single-throw SPST switch, etc.

[0071] Take the case where the input end of the switch device is connected to the first transceiver path as an example:

[0072] Taking the current working antenna as the first antenna as an example, if the second control signal requests an antenna switching operation, it is determined according to the first control signal whether the first transceiver path is performing a transmission operation of the first radio frequency signal.

[0073] If the first transceiver path does not perform the transmission operation of the first RF signal, it means that the first transceiver path is not in the RF transmission state. Since antenna switching and RF transmission state cannot occur at the same time, when the first RF path is not in the RF transmission state, the antenna switching operation can be performed, that is, the working antenna is switched from the first antenna to the second antenna. While realizing the antenna switching, it is ensured that no reflected signal enters the PA, thereby solving the problem of transient open circuit burning of the PA during antenna switching.

[0074] If the first transceiver path performs the transmission operation of the first RF signal, it means that the first transceiver path is in the RF transmission state. Since antenna switching and RF transmission state cannot occur at the same time, when the first RF path is in the RF transmission state, the antenna switching operation cannot be performed, ensuring that no reflected signal enters the PA, thereby solving the problem of transient open circuit burning of the PA during antenna switching.

[0075] Similarly, when the input end of the switch device is connected to the second transceiver path, the implementation method is similar and will not be described in detail here.

[0076] The state conversion module is used to output a third control signal to control the conduction state of the switch device, thereby achieving the control purpose of antenna switching.

[0077] Figure 4 for Figure 2 The third schematic diagram of the radio frequency system is shown in FIG. Figure 4 As shown, the RF transceiver is configured with a transmitting port and a receiving port, the transmitting port is configured to support the transmission processing of the first RF signal and the second RF signal, and the receiving port is configured to support the reception processing of the first RF signal and the second RF signal.

[0078] In the present application, the same transmitting port can simultaneously transmit the first RF signal and the second RF signal, and the same receiving port can simultaneously receive the first RF signal and the second RF signal, so that the first transceiver path and the second transceiver path are both connected to the same transmitting port, and the first transceiver path and the second transceiver path are both connected to the same receiving port, thereby improving the integration of the circuit.

[0079] Specifically, the first transceiver path includes a first transmitting branch and a first receiving branch, wherein:

[0080] The input end of the first transmitting branch is connected to the transmitting port of the radio frequency transceiver, and the output end of the first transmitting branch is switchably connected to the input end of the switch device.

[0081] Specifically, the first transmitting branch receives the first RF signal through the transmitting port of the RF transceiver, and is connected to the first antenna or the second antenna through the switching device, so as to transmit the first RF signal using the first antenna or the second antenna. Furthermore, the first transmitting branch is also configured with a first power amplifier unit for power amplifying the first RF signal. The first transmitting branch can also use the first power amplifier unit in the first transmitting branch to amplify the first RF signal and then output it, so as to increase the transmission distance of the first RF signal.

[0082] The input end of the first receiving branch is connected to the receiving port of the radio frequency transceiver, and the output end of the first receiving branch is switchably connected to the input end of the switch device.

[0083] Specifically, the first receiving branch is connected to the first antenna or the second antenna through a switching device to receive the first RF signal from the first antenna or the second antenna, and the received first RF signal is sent to the RF transceiver through the receiving port of the RF transceiver. Furthermore, the first receiving branch is also configured with a second power amplifier unit for power amplifying the first RF signal. The first receiving branch can also use the second power amplifier unit in the first receiving branch to amplify the first RF signal and then output it to increase the receiving distance of the second RF signal.

[0084] In an exemplary embodiment, the second transceiver path includes a second transmit branch and a second receive branch, wherein:

[0085] The input end of the second transmitting branch is connected to the transmitting port of the radio frequency transceiver, and the output end of the second transmitting branch is switchably connected to the input end of the switch device.

[0086] Specifically, the second transmitting branch receives the second RF signal through the transmitting port of the RF transceiver, and is connected to the first antenna or the second antenna through the switching device, so as to transmit the second RF signal using the first antenna or the second antenna. Furthermore, the second transmitting branch is also configured with a first power amplifier unit for power amplifying the second RF signal. The second transmitting branch can also use the first power amplifier unit in the second transmitting branch to amplify the second RF signal and then output it, so as to increase the transmission distance of the second RF signal.

[0087] The input end of the second receiving branch is connected to the receiving port of the radio frequency transceiver, and the output end of the second receiving branch is switchably connected to the input end of the switch device.

[0088] Specifically, the second receiving branch is connected to the first antenna or the second antenna through a switching device to receive the first RF signal from the first antenna or the second antenna, and the received second RF signal is sent to the RF transceiver through the receiving port of the RF transceiver. Furthermore, the second receiving branch is also configured with a second power amplifier unit for power amplification of the second RF signal. The second receiving branch can also use the second power amplifier unit in the second receiving branch to amplify the second RF signal and then output it to increase the receiving distance of the second RF signal.

[0089] Furthermore, the first frequency band corresponding to the first radio frequency signal and the second frequency band corresponding to the second radio frequency signal adopt a time division duplexing (TDD) working mechanism, that is, the first transceiver path and the second transceiver path are the same transceiver path, sharing a receiving branch and a transmitting branch. A communication cycle includes the working time of the first frequency band and the working time of the second frequency band, wherein the working time of the first frequency band and the working time of the second frequency band are each divided into a plurality of transceiver cycles, and each transceiver cycle includes a time for transmission and a time for reception.

[0090] By setting the transmitting port and receiving port of the RF transceiver to support the frequency bands corresponding to the first RF signal and the second RF signal, the first transceiver path and the second transceiver path can use the same transmitting port and receiving port, and because the circuit structures of the first transceiver path and the second transceiver path are the same, the first RF signal and the second RF signal can be transmitted and received using the same transceiver path.

[0091] By adopting the above structure, the first radio frequency signal and the second radio frequency signal can be sent and received, and the circuit structure of the radio frequency system can be simplified.

[0092] In an exemplary embodiment, the first control circuit includes a first control branch, a second control branch and a third control branch; wherein:

[0093] A first control branch is configured to output a first branch signal, wherein the first branch signal is used to enable a first PA in the first transceiver circuit and the second transceiver circuit;

[0094] Specifically, after the first transceiver path receives the first branch signal, if the first branch signal enables the first PA to be in a working state, the first transceiver circuit performs the transmission operation of the first RF signal; if the first branch signal enables the first PA not to be in a working state, the first transceiver circuit does not perform the transmission operation of the first RF signal. Similarly, the processing method of the second transceiver path for the second RF signal can be obtained, which will not be repeated here.

[0095] After the state conversion module receives the first branch signal, if the first branch signal enables the first PA to be in a working state, it can be determined that the current first transceiver path is in a RF transmission state; if the first branch signal enables the first PA not to be in a working state, it can be determined that the current first transceiver path is not in a RF transmission state.

[0096] A second control branch is configured to output a second branch signal, wherein the second branch signal is used to enable the transceiver operation of the first radio frequency signal in the first transceiver circuit and the second transceiver circuit;

[0097] Specifically, after the first transceiver path receives the second branch signal, if the second branch signal enables the first RF signal to be in a transceiver state, the first transceiver circuit can perform the transceiver operation of the first RF signal; if the second branch signal enables the first RF signal not to be in a transceiver state, the first transceiver circuit does not perform the transceiver operation of the first RF signal.

[0098] After the state conversion module receives the second branch signal, if the second branch signal enables the first RF signal to be in the transceiver state, it can be determined that the current first transceiver path is in the RF transceiver state; if the first branch signal enables the first RF signal not to be in the transceiver state, it can be determined that the current first transceiver path is not in the RF transceiver state.

[0099] A third control branch is configured to output a third branch signal, wherein the third branch signal is used to enable the second PA in the first transceiver circuit and the second transceiver circuit;

[0100] Specifically, after the first transceiver path receives the third branch signal, if the third branch signal is to enable the second PA to be in a working state, the first transceiver circuit performs a receiving operation of the first RF signal; if the first branch signal is to enable the second PA not to be in a working state, the first transceiver circuit does not perform a receiving operation of the first RF signal. Similarly, the processing method of the second transceiver path for the second RF signal can be obtained, which will not be repeated here.

[0101] After the state conversion module receives the third branch signal, if the third branch signal enables the second PA to be in a working state, it can be determined that the current first transceiver path is in a RF receiving state; if the third branch signal enables the second PA not to be in a working state, it can be determined that the current first transceiver path is not in a RF receiving state.

[0102] In an exemplary embodiment, the second control circuit includes an AP, and the application controller AP is configured to determine whether to perform an antenna switching operation according to the received collection result, and output a second control signal.

[0103] Specifically, the application controller AP may determine whether to perform the antenna switching operation according to a preset antenna switching strategy, such as signal strength or an external switching request.

[0104] Furthermore, the first radio frequency signal is a Bluetooth signal, and the second radio frequency signal is a Wi-Fi signal.

[0105] Figure 5 for Figure 4 The application diagram of the RF system is shown in Figure 1. Figure 5 As shown, the radio frequency system is a circuit diagram of a radio frequency system shared by Bluetooth and Wi-Fi with an operating frequency band of 2.4G (ie, Wi-Fi 2.4G) on a mobile phone. Figure 5 In the present invention, Wi-Fi and BT use the TDD working mechanism and share the same transceiver channel. Here, the transceiver channel shared by Wi-Fi and BT is the first transceiver channel mentioned above as an example. A communication cycle includes BT working time and Wi-Fi working time. BT working time and Wi-Fi working time are each divided into multiple transceiver cycles. Each transceiver cycle includes one transmission time and one reception time.

[0106] The RF transceiver is provided with a signal interface shared by BT and Wi-Fi, including a transmitting interface Wi-Fi&BT TX0 and a receiving interface Wi-Fi&BT RX0;

[0107] Among them, the first transmitting branch shared by Wi-Fi and BT includes a power amplifier PA and a connector CPL0, and the first transmitting branch is connected to the transmitting interface Wi-Fi & BT TX0 on the RF transceiver through the first signal transmitting terminal TX0; the first receiving branch shared by Wi-Fi and BT includes a low noise amplifier LNA and a bypass switch BYPASS, and the first receiving branch is connected to the receiving interface Wi-Fi & BT RX0 on the RF transceiver through the first signal receiving terminal RX0. The first transmitting branch and the first receiving branch also share a switching switch, namely a single-pole double-throw switch SPDT0. The first end (also called the common end) of SPDT0 is connected to the antenna port ATN_0 of the chip.

[0108] The antenna port ATN_0 is connected to a first terminal of a switch device SPDT1, which may be a single-pole double-throw switch. One of the two second terminals of SPDT1 is connected to the first antenna ANT0 through a first filter FLT0, and the other is connected to the second antenna ANT1 through a second filter FLT1.

[0109] The state conversion module may send a third control signal to the switch device SPDT1 so that the first transceiver path is connected to the first antenna ANT0 or the second antenna ANT1 .

[0110] Figure 5 In the illustrated embodiment, the Wi-Fi & BT FEM chip is also provided with a power supply terminal VCC, and some enable terminals connected to corresponding interfaces of the WCN IC, such as a Bluetooth enable terminal BTEN, a low noise amplifier enable terminal LNAEN and a power amplifier enable terminal PAEN, and these enable terminals are connected to corresponding control ports of the WCN IC.

[0111] Corresponding to the enable end corresponding to the Wi-Fi & BT FEM chip, the WCN IC is provided with multiple GPIOs for connecting to the enable end on the front-end module, including a first GPIO interface (WL_XFEM_CTRL_2G_CH1_0_GPIO) connected to the power amplifier enable end PAEN, a second GPIO interface (WL_XFEM_CTRL_2G_CH1_1_GPIO) connected to the low noise amplifier enable end LNAEN, and a third GPIO interface (WL_XFEM_CTRL_2G_CH1_2_GPIO) connected to the Bluetooth enable end BTEN.

[0112] Specifically, if the signal received by the power amplifier enable terminal PAEN from the first GPIO interface is to enable the PA to be in a working state, it indicates that the current first transmitting branch is in a working state; if the signal received from the first GPIO interface is to enable the PA not to be in a working state, it indicates that the current first RF branch is not in a working state.

[0113] If the signal received by the low noise amplifier enable terminal LNAEN from the second GPIO interface is to enable the LNA to be in a working state, it means that the first receiving branch is in a working state; if the signal received from the second GPIO interface is to enable the LNA not to be in a working state, it means that the first receiving branch is currently not in a working state.

[0114] If the signal received by the Bluetooth enabling end BTEN from the third GPIO interface is a radio frequency signal that enables BT to be in a transceiver state, it indicates that the current first transmitting branch and the first receiving branch are in the radio frequency signal transceiver state of BT; if the signal received from the third GPIO interface is a radio frequency signal that enables BT to be not in a working state, it indicates that the current first transmitting branch and the first receiving branch are not in the radio frequency signal transceiver state of BT.

[0115] Figure 6 for Figure 2 A fourth schematic diagram of a radio frequency system is shown. Figure 6 As shown, the radio frequency system also includes:

[0116] A transmitting path, one end of which is connected to the radio frequency transceiver, and the other end of which is switchably connected to the first antenna or the second antenna, and the transmitting path is used to transmit the first radio frequency signal.

[0117] The radio frequency transceiver also includes another transmitting port for transmitting a first radio frequency signal.

[0118] The transmission path includes a power amplifier PA and a bypass switch BYPASS.

[0119] The transmission path receives a first radio frequency signal through another transmission port, and uses a power amplifier to amplify the first radio frequency signal and then outputs it.

[0120] Figure 7 for Figure 6 The application diagram of the RF system is shown in Figure 1. Figure 7 As shown, the transmission path is connected to the Bluetooth transmission interface BT TX0 on the RF transceiver via the Bluetooth transmission terminal BT0, wherein the first control branch and the second control branch mentioned above can both control the RF transmission state of the transmission path.

[0121] Figure 8 Flow chart of the antenna switching method provided in the embodiment of the present application. Figure 8 As shown, the antenna switching method is implemented in an electronic device such as a mobile phone, and the electronic device includes a radio frequency system of any embodiment of the present application. The antenna switching method includes:

[0122] Step 110, receiving a first control signal and a second control signal; wherein the first control signal is used to enable the transceiver function of the first transceiver path and the second transceiver path, and the second control signal is used to enable the antenna switching operation;

[0123] Step 120: If the second control signal requests an antenna switching operation, determining whether the first transceiver path and the second transceiver path are performing a radio frequency signal transmission operation according to the first control signal;

[0124] Step 130: If neither the first transceiver path nor the second transceiver path performs a radio frequency signal transmission operation, an antenna switching operation is performed.

[0125] Compared with the related art in which an antenna switching operation is performed upon receiving an antenna switching operation request, the method provided in the present application, when receiving a second control signal requesting antenna switching, also determines the transceiver status of the first transceiver path and the second transceiver path according to the first control signal to judge whether the switching can be performed, so that the antenna switching and the RF transmission state do not occur at the same time, ensuring that no reflected signal enters the PA, thereby solving the problem of transient open circuit burning of the PA due to antenna switching.

[0126] The method provided in the embodiment of the present application is described below:

[0127] Determining, according to the first control signal, whether the first transceiver path and the second transceiver path are performing a transmission operation of the radio frequency signal includes:

[0128] Acquire a first branch signal output by the first control branch and a second branch signal output by the second control branch, wherein the first branch signal is used to enable a first power amplification unit in the first transceiver circuit and the second transceiver circuit, and the second branch signal is used to enable transceiver operations of radio frequency signals in a second frequency band in the first transceiver circuit and the second transceiver circuit;

[0129] According to the first branch signal and the second branch signal, it is determined whether the first transceiver path and the second transceiver path are performing a transmission operation of the radio frequency signal.

[0130] By judging whether the first transceiver path and the second transceiver path are performing the transmission operation of the radio frequency signal according to the first branch signal and the second branch signal, the judging method is simple to implement.

[0131] by Figure 7 The RF system shown in the figure is combined with Fig. 9 The timing diagram shown is used to illustrate:

[0132] Figure 7 In the radio frequency system shown, when the third control signal SPDT_OUT is at a high level, SPDT1 selects the second antenna ANT1; when the third control signal SPDT_OUT is at a low level, the first antenna ANT0 is selected. The logic may also be the opposite according to the actual circuit.

[0133] (1) When the AP determines that it needs to switch to ANT1 in the specified scenario, the AP outputs the second control signal AP_CTRL, and the level of the signal is high. At this time, the state conversion module will collect the current second control signal at the same time, where the second control signal includes the PA EN signal, the BT EN signal and the LNA EN signal. In the figure, the levels of the PA EN signal and the BT EN signal are both low, indicating that both WIFI and BT are in the non-TX state, and the SPDT_OUT control signal is also pulled high, and the antenna switching is completed immediately.

[0134] (2) When the AP determines that it needs to switch to ANT0 in the specified scenario, the AP outputs the second control signal AP_CTRL, and the level of the signal is low. At this time, the state conversion module will collect the current second control signal at the same time, where the second control signal includes the PA EN signal, the BT EN signal and the LNA EN signal. In the figure, the levels of the PA EN signal and the BT EN signal are both low, indicating that both WIFI and BT are in the non-TX state. The level of the LNA_EN signal is high, indicating that WIFI / BT is in the RX state. At this time, the third control signal SPDT_OUT control signal can also be immediately pulled down to switch to the ANT0 antenna, because there is no risk of hardware damage when switching the switch in the RX state.

[0135] (3) When the AP determines again that it needs to switch to ANT1 in the specified scenario, the AP outputs the second control signal AP_CTRL at a high level. At this time, the state conversion module will simultaneously collect the current second control signals, including the PA EN signal, the BT EN signal, and the LNA EN signal. In the figure, the BT EN signal is at a high level, indicating that the BT is in the TX state. At this time, the antenna cannot be switched, so the third control signal SPDT_OUT is always at a low level. This state continues until the BT EN is pulled low, and then the third control signal SPDT_OUT is pulled high, thereby completing the antenna switching.

[0136] (4) When the AP determines that it is to switch to ANT0 in the specified scenario, the AP outputs the second control signal AP_CTRL with a low level. At this time, the state conversion module will simultaneously collect the current second control signals, including the PA EN signal, the BT EN signal and the LNA EN signal. The level of the PA EN signal in the figure is high, indicating that the WIFI is in the TX state, indicating that the antenna cannot be switched at this time, so the level of the third control signal SPDT_OUT is always high. This state continues until PA EN is pulled low, and the third control signal SPDT_OUT will be pulled low, thereby completing the antenna switching.

[0137] From the above introduction, it can be seen that the second control signal AP_CTRL determines whether to switch the antenna, but the actual time point of antenna switching completion is determined by the four control signals PA EN, BT EN, LNA EN and AP CTRL. The purpose is to ensure that SPDT1 does not switch the antenna during WIFI or BT TX.

[0138] When the above scheme combines the control signals to obtain the switching timing, it only ensures that the BT and WIFI switches are performed when they are not in TX state. Because the antenna can also be switched when the WIFI / BT RX state is in progress, its advantage is that it can ensure that the delay between scene judgment completion and antenna switching completion is lower, and the response is faster. Fig. 9 In the case of sequence number (2) in the timing diagram, the switching transient is in an open circuit state, so the RX process may lose packets, resulting in an additional retransmission. If the antenna is switched frequently, it may cause obvious jamming. Based on the above problems, the following solutions are proposed, including:

[0139] Optionally, the method further includes:

[0140] If neither the first transceiver path nor the second transceiver path performs a transmission operation of the first radio frequency signal or the second radio frequency signal, detecting whether the first transceiver path or the second transceiver path performs a reception operation of the radio frequency signal;

[0141] After detecting that neither the first transceiver path nor the second transceiver path performs the operation of receiving the radio frequency signal, the antenna switching operation is performed.

[0142] Optionally, detecting whether the first transceiver path and the second transceiver path perform a reception operation of a radio frequency signal in a first frequency band or a second frequency band includes:

[0143] Acquire a third branch signal output by the third control branch, wherein the third branch signal is used to enable a low noise power amplifier unit in the first transceiver circuit and the second transceiver circuit;

[0144] According to the third branch signal, it is determined whether the first transceiver path and the second transceiver path are performing a receiving operation of the radio frequency signal.

[0145] Optionally, the method further includes:

[0146] If at least one of the first transceiver path and the second transceiver path is performing a radio frequency signal receiving operation, monitoring whether the level of the third branch signal changes;

[0147] If the level of the third branch signal changes, it is determined that neither the first transceiver path nor the second transceiver path performs a reception operation of the radio frequency signal.

[0148] By detecting whether the level changes, it is determined whether the receiving operation of the radio frequency signal is completed, and the implementation method is simple.

[0149] by Fig.10 Take the timing diagram shown as an example for explanation:

[0150] When the second control signal AP_CTRL determines that the scene needs to switch the antenna, if LNA EN is in a high state at this time, that is, WIFI / BT is in RX state, SPDT OUT will continue until the end of this RX event before the control signal changes, that is, the antenna is switched.

[0151] The advantage of this solution is that it will not cause RX packet loss and reduce retransmission, but it makes the antenna switching slower in response to scene switching. However, considering the user scenario, the switching of general user scenarios is not so frequent, and the demand can be met without the need for antenna switching so quickly. Therefore, this extension solution has better effects in some infrequent switching scenarios.

[0152] The present application also provides an antenna switching device, such as Fig.11 As shown, it includes a memory 60 and a processor 50 storing a computer program, wherein the processor 50 can implement the antenna switching method as described above when executing the computer program.

[0153] An embodiment of the present application further provides an electronic device, which includes a radio frequency system as described in any of the above embodiments.

[0154] An embodiment of the present application further provides a computer-readable storage medium, which stores a computer program. When the computer program is executed by a processor, it can implement the antenna switching method as described in any of the above embodiments.

[0155] The above embodiments of the present application propose a solution to the problem that transient open circuit of antenna switching may damage PA. It can avoid the RF signal being transmitted to the switch and then reflected back to the PA during switch switching, thereby solving the impact on the PA in the antenna intelligent switching solution.

[0156] In any one or more of the above exemplary embodiments, the functions described may be implemented in hardware, software, firmware, or any combination thereof. If implemented in software, the functions may be stored on a computer-readable medium or transmitted via a computer-readable medium as one or more instructions or codes, and executed by a hardware-based processing unit. A computer-readable medium may include a computer-readable storage medium corresponding to a tangible medium such as a data storage medium, or a communication medium that facilitates a computer program, such as any medium transmitted from one place to another according to a communication protocol. In this way, a computer-readable medium may generally correspond to a non-temporary tangible computer-readable storage medium or a communication medium such as a signal or carrier wave. A data storage medium may be any available medium that can be accessed by one or more computers or one or more processors to retrieve instructions, codes, and / or data structures for implementing the technology described in the present disclosure. A computer program product may include a computer-readable medium.

[0157] By way of example and not limitation, such computer-readable storage media may include RAM, ROM, EEPROM, CD-ROM or other optical disk storage, magnetic disk storage or other magnetic storage, flash memory, or any other medium that can be used to store the desired program code in the form of instructions or data structures and can be accessed by a computer. Moreover, any connection may also be referred to as a computer-readable medium. For example, if instructions are transmitted from a website, server or other remote source using coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL), or wireless technologies such as infrared, radio and microwave, then coaxial cable, fiber optic cable, twisted pair, DSL, or wireless technologies such as infrared, radio and microwave are included in the definition of medium. However, it should be understood that computer-readable storage media and data storage media do not include connections, carrier waves, signals, or other transient (transient) media, but are directed to non-transient tangible storage media. As used herein, disks and optical disks include compact disks (CDs), laser disks, optical disks, digital versatile disks (DVDs), floppy disks, or Blu-ray disks, etc., where disks typically reproduce data magnetically, while optical disks use lasers to reproduce data optically. Combinations of the above should also be included within the scope of computer-readable media.

[0158] By way of example and not limitation, instructions may be executed by one or more processors, such as one or more digital signal processors (DSPs), general purpose microprocessors, application specific integrated circuits (ASICs), field programmable logic arrays (FPGAs), or other equivalent integrated or discrete logic circuits. Thus, the term "processor," as used herein, may refer to any of the aforementioned structures or any other structure suitable for implementing the techniques described herein. Additionally, in some aspects, the functionality described herein may be provided within dedicated hardware and / or software modules configured for encoding and decoding, or incorporated in a combined codec. Also, the techniques may be fully implemented in one or more circuits or logic elements.

[0159] The technical solutions of the embodiments of the present disclosure can be implemented in a wide variety of devices or equipment, including wireless mobile phones, integrated circuits (ICs) or a group of ICs (e.g., chipsets). Various components, modules or units are described in the embodiments of the present disclosure to emphasize the functional aspects of the devices configured to perform the described techniques, but they do not necessarily need to be implemented by different hardware units. Instead, as above, the various units can be combined in a codec hardware unit or provided by a collection of interoperable hardware units (including one or more processors as above) in combination with suitable software and / or firmware.

Claims

1. A radio frequency system, characterized in that: include: RF transceiver; a first transceiver path, one end of which is connected to the radio frequency transceiver, and the other end of which is switchably connected to a first antenna or a second antenna, and the first transceiver path is used for transmitting and receiving a first radio frequency signal; a second transceiver path, one end of which is connected to the radio frequency transceiver, and the other end of which is switchably connected to the first antenna or the second antenna, and the second transceiver path is used for transmitting and receiving a second radio frequency signal; A first control circuit is connected to the first transceiver path and the second transceiver path, and is configured to transmit a first control signal, wherein the first control signal is used to enable the transceiver function of the first transceiver path and the second transceiver path; A second control circuit is connected to the first transceiver path and the second transceiver path and is configured to transmit a second control signal, wherein the second control signal is used to enable an antenna switching operation; A switching control circuit is connected to the first control circuit and the second control circuit, and is used to receive the first control signal and the second control signal, and control one of the first transceiver path and the second transceiver path to switch connection with one of the first antenna and the second antenna according to the first control signal and the second control signal; and if the second control signal requests an antenna switching operation, and the first control signal indicates that neither the first transceiver path nor the second transceiver path performs a radio frequency signal transmission operation, then perform an antenna switching operation.

2. The radio frequency system according to claim 1, characterized in that: The switching control circuit includes a state conversion module and a switch device; wherein: The first input end of the state conversion module is connected to the first control circuit, the second input end of the state conversion module is connected to the second control circuit, and the output end of the state conversion module is connected to the control end of the switch device, and is used to receive the first control signal and the second control signal, and output a third control signal according to the first control signal and the second control signal; The input end of the switching device is connected to the first transceiver path or the second transceiver path, the first output end of the switching device is connected to the first antenna, and the second output end of the switching device is connected to the second antenna. The switching device is configured to control one of the first transceiver path and the second transceiver path and one of the first antenna and the second antenna to be in a conductive state according to the third control signal.

3. The radio frequency system according to claim 2, characterized in that: The RF transceiver is configured with a transmitting port and a receiving port, the transmitting port is configured to support transmission processing of the first RF signal and the second RF signal, and the receiving port is configured to support reception processing of the first RF signal and the second RF signal.

4. The radio frequency system according to claim 3, characterized in that: The first transceiver path includes a first transmitting branch and a first receiving branch, wherein: The input end of the first transmitting branch is connected to the transmitting port of the RF transceiver, the output end of the first transmitting branch is switchably connected to the input end of the switch device, and the first transmitting branch is further configured with a first power amplification unit for performing power amplification processing on the first RF signal; The input end of the first receiving branch is connected to the receiving port of the RF transceiver, the output end of the first receiving branch is switchably connected to the input end of the switching device, and the first receiving branch is also configured with a second power amplification unit for power amplifying the first RF signal.

5. The radio frequency system according to claim 4, characterized in that: The second transceiver path includes a second transmitting branch and a second receiving branch, wherein: The input end of the second transmitting branch is connected to the transmitting port of the RF transceiver, the output end of the second transmitting branch is switchably connected to the input end of the switch device, and the second transmitting branch is further configured with the first power amplifying unit for performing power amplification processing on the second RF signal; The input end of the second receiving branch is connected to the receiving port of the RF transceiver, the output end of the second receiving branch is switchably connected to the input end of the switching device, and the second receiving branch is also configured with the second power amplification unit for power amplifying the second RF signal.

6. The radio frequency system according to claim 5, characterized in that: The first transceiver path and the second transceiver path are the same transceiver path and are configured to operate in a time division duplex mode.

7. The radio frequency system according to claim 1, characterized in that: The first radio frequency signal is a Bluetooth signal, and the second radio frequency signal is a Wi-Fi signal.

8. The system according to claim 1, characterized in that: The first transceiver path and the second transceiver path are both provided with a control interface, and the control interface is connected to the first control circuit and is used to receive the first control signal.

9. The system according to claim 4 or 5, characterized in that: The first control circuit comprises: A first control branch is configured to output a first branch signal, wherein the first branch signal is used to enable the first power amplification unit in the first transceiver path and the second transceiver path; A second control branch is configured to output a second branch signal, wherein the second branch signal is used to enable the transceiver operation of the radio frequency signal of the first frequency band in the first transceiver path and the second transceiver path; The third control branch is configured to output a third branch signal, wherein the third branch signal is used to enable the second power amplification unit in the first transceiver path and the second transceiver path.

10. The system according to claim 1, characterized in that The second control circuit includes an application controller, and the application controller is configured to determine whether to perform an antenna switching operation according to the received collection result and output a second control signal.

11. An antenna switching method, characterized in that: The radio frequency system according to any one of claims 1 to 10 comprises: Receiving the first control signal and the second control signal; wherein the first control signal is used to enable the transceiver function of the first transceiver path and the second transceiver path, and the second control signal is used to enable the antenna switching operation; If the second control signal requests an antenna switching operation, determining whether the first transceiver path and the second transceiver path are performing a radio frequency signal transmission operation according to the first control signal; If neither the first transceiver path nor the second transceiver path performs a radio frequency signal transmission operation, an antenna switching operation is performed.

12. The method according to claim 11, characterized in that The determining, according to the first control signal, whether the first transceiver path and the second transceiver path are performing a transmission operation of a radio frequency signal includes: Acquire a first branch signal output by the first control branch and a second branch signal output by the second control branch, wherein the first branch signal is used to enable a first power amplification unit in the first transceiver path and the second transceiver path, and the second branch signal is used to enable transceiver operations of radio frequency signals in a second frequency band in the first transceiver path and the second transceiver path; According to the first branch signal and the second branch signal, it is determined whether the first transceiver path and the second transceiver path are performing a transmission operation of a radio frequency signal.

13. The method according to claim 11 or 12, characterized in that: The method further comprises: If neither the first transceiver path nor the second transceiver path performs a transmission operation of the first radio frequency signal or the second radio frequency signal, detecting whether the first transceiver path nor the second transceiver path performs a reception operation of the radio frequency signal; After detecting that neither the first transceiver path nor the second transceiver path performs a radio frequency signal receiving operation, the antenna switching operation is performed.

14. The method according to claim 13, characterized in that The detecting whether the first transceiver path and the second transceiver path perform a receiving operation of a radio frequency signal in a first frequency band or a second frequency band includes: Acquire a third branch signal output by a third control branch, wherein the third branch signal is used to enable low noise power amplifier units in the first transceiver path and the second transceiver path; According to the third branch signal, it is determined whether the first transceiver path and the second transceiver path are performing a reception operation of a radio frequency signal.

15. The method according to claim 14, characterized in that The method further comprises: If at least one of the first transceiver path and the second transceiver path is performing a radio frequency signal receiving operation, monitoring whether the level of the third branch signal changes; If the level of the third branch signal changes, it is determined that neither the first transceiver path nor the second transceiver path performs a reception operation of a radio frequency signal.

16. An electronic device comprising the radio frequency system according to any one of claims 1 to 10.

17. A computer-readable storage medium storing a computer program, characterized in that: The computer program can implement the antenna switching method as claimed in any one of claims 11 to 15 when executed by a processor.

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