A radio frequency system and a radio frequency communication method

Abstract

An embodiment of the present application discloses a radio frequency system and a radio frequency communication method. The radio frequency system includes: an antenna assembly including a first antenna, a second antenna, a third antenna, and a fourth antenna; a first radio frequency path switchably connected to the first antenna or the second antenna for performing a transceiver operation on radio frequency signals in a first frequency band by using the first antenna and a receiving operation on radio frequency signals in the first frequency band by using the second antenna; a second radio frequency path switchably connected to the third antenna or the fourth antenna for performing a transceiver operation on radio frequency signals in the first frequency band by using the third antenna and a receiving operation on radio frequency signals in the first frequency band by using the fourth antenna; and a receiving path switchably connected to the third antenna or the fourth antenna for performing a receiving operation on radio frequency signals in the first frequency band.

Description

Technical Field

[0001] Embodiments of the present application relate to the field of information processing, and particularly to a radio frequency front-end device and an electronic device. Background Art

[0002] A radio frequency communication system includes a radio frequency transceiver, a radio frequency front-end device, and an antenna assembly. The antenna assembly may include at least two antennas. The radio frequency front-end device can receive a radio frequency signal from the radio frequency transceiver, process it, and transmit it through the antennas in the antenna assembly. Also, it can receive a radio frequency signal through the antennas in the antenna assembly, process it, and send it to the radio frequency transceiver.

[0003] When the electronic device operates in the DR-DSDS (Dual Recevie-Dual SIM Dual Standby) mode, the radio frequency system cannot support antenna switching in the FDD (Frequency Division Duplex) mode. Summary of the Invention

[0004] To solve any of the above technical problems, embodiments of the present application provide a radio frequency system and a radio frequency communication method.

[0005] To achieve the objectives of the embodiments of the present application, embodiments of the present application provide a radio frequency system, including:

[0006] An antenna assembly, including a first antenna, a second antenna, a third antenna, and a fourth antenna;

[0007] A first radio frequency path, switchably connected to the first antenna or the second antenna, for performing transceiver operations on radio frequency signals in a first frequency band using the first antenna, and for receiving radio frequency signals in the first frequency band using the second antenna;

[0008] A second radio frequency path, switchably connected to the third antenna or the fourth antenna, for performing transceiver operations on radio frequency signals in a first frequency band using the third antenna, and for receiving radio frequency signals in the first frequency band using the fourth antenna;

[0009] A receiving path, switchably connected to the third antenna or the fourth antenna, for performing receiving operations on radio frequency signals in a first frequency band.

[0010] A radio frequency communication method, applied to the radio frequency system, includes:

[0011] Detecting whether an antenna switching operation occurs in the first radio frequency path;

[0012] If the first radio frequency path is switched from the second antenna to the first antenna, control the second radio frequency path and the receiving path to both perform antenna switching operations.

[0013] One of the above technical solutions has the following advantages or beneficial effects:

[0014] Since the receiving path is switchably connected to the third antenna or the fourth antenna, when the second radio frequency path performs antenna switching, the receiving path can also perform antenna switching along with the second radio frequency path, so as to achieve the purpose that both the transmitting path and the receiving path perform antenna switching, and thus achieve antenna switching in the FDD mode.

[0015] Other features and advantages of the embodiments of the present application will be described in the following specification, and some of them will become obvious from the specification, or be understood by implementing the embodiments of the present application. The objectives and other advantages of the embodiments of the present application can be achieved and obtained through the structures specifically pointed out in the specification, claims, and drawings. Description of the Drawings

[0016] The drawings are used to provide a further understanding of the technical solutions of the embodiments of the present application, and constitute a part of the specification. Together with the embodiments of the present application, they are used to explain the technical solutions of the embodiments of the present application, and do not constitute a limitation to the technical solutions of the embodiments of the present application.

[0017] Figure 1 It is a schematic diagram of a radio frequency system in the related art;

[0018] Figure 2 For Figure 1 An application schematic diagram of the radio frequency system shown;

[0019] Figure 3 It is a schematic diagram of the radio frequency system provided by the embodiment of the present application;

[0020] Figure 4(a) is for Figure 3 The first schematic diagram of the radio frequency system shown;

[0021] Figure 4(b) is for Figure 3 The second schematic diagram of the radio frequency system shown;

[0022] Figure 4(c) is for Figure 3 The third schematic diagram of the radio frequency system shown;

[0023] Figure 5 For Figure 3 The fourth schematic diagram of the radio frequency system shown;

[0024] Figure 6(a) is for Figure 5 The first schematic diagram of the radio frequency system shown;

[0025] Figure 6(b) is forFigure 5 The second schematic diagram of the radio frequency system shown;

[0026] Figure 6(c) is Figure 5 The third schematic diagram of the radio frequency system shown;

[0027] Figure 7 is Figure 3 The fifth schematic diagram of the radio frequency system shown;

[0028] Figure 8(a) is Figure 7 The first schematic diagram of the radio frequency system shown;

[0029] Figure 8(b) is Figure 7 The second schematic diagram of the radio frequency system shown;

[0030] Figure 9 The architecture diagram of the radio frequency system provided by the embodiment of the present application;

[0031] Figure 10 The schematic diagram of the radio frequency communication method provided by the embodiment of the present application. Detailed implementation manners

[0032] To make the objectives, technical solutions, and advantages of the embodiments of the present application clearer and more understandable, the embodiments of the present application will be described in detail below with reference to the accompanying drawings. It should be noted that, without conflict, the embodiments and features in the embodiments of the present application can be combined arbitrarily with each other.

[0033] The radio frequency front-end devices involved in the embodiments of the present application can be applied to communication devices with wireless communication functions. The communication devices can be handheld devices, vehicle-mounted devices, wearable devices, computing devices, or other processing devices connected to a wireless modem, as well as various forms of user equipment (UE) (e.g., mobile phones), mobile stations (MS), etc. For the sake of convenience of description, the devices mentioned above are collectively referred to as communication devices.

[0034] Each antenna involved in the embodiments of the present application can be formed using any suitable type of antenna. For example, each antenna can include an antenna having a resonant element formed by the following antenna structures: an array antenna structure, a loop antenna structure, a patch antenna structure, a slot antenna structure, a spiral antenna structure, a strip antenna, a monopole antenna, a dipole antenna, etc. at least one of them. Different types of antennas can be used for different frequency bands and frequency band combinations. The antennas mentioned in the embodiments of the present application are not specifically limited.

[0035] Figure 1 It is a schematic diagram of a radio frequency system in the related art. As Figure 1 shown, the radio frequency system includes:

[0036] An antenna assembly, comprising a first antenna, a second antenna, a third antenna and a fourth antenna;

[0037] A first radio frequency path, switchably connected to the first antenna or the second antenna, for transmitting and receiving radio frequency signals in a first frequency band by using the first antenna, and for receiving radio frequency signals in the first frequency band by using the second antenna;

[0038] A second radio frequency path, switchably connected to the third antenna or the fourth antenna, for transmitting and receiving radio frequency signals in a first frequency band by using the third antenna, and for receiving radio frequency signals in the first frequency band by using the fourth antenna;

[0039] A receiving path, connected to the fourth antenna, for receiving radio frequency signals in a first frequency band.

[0040] In Figure 1 The shown radio frequency system can provide a dual standby function for radio frequency signals in a first frequency band, wherein the first radio frequency path is used for data transmission of card 1, and both the second radio frequency path and the receiving path are used for data transmission of card 2.

[0041] During the implementation of the present application, it is found that Figure 1 The shown structure has the following problems, including:

[0042] In Figure 1 In the shown radio frequency system, card 2 executes a method that only supports Tx hopping, that is, the transmission path is switched, and the receiving path is not switched. While the usual antenna switching is that when the transmission path is switched, the corresponding receiving path must also be switched accordingly, that is, FDD mode antenna switching.

[0043] Since the two-way transmission switching mechanism platform in the same frequency band cannot be set separately, the first radio frequency path of card 1 can only implement antenna switching ASDIV in the Tx hopping mode. In this way, in the DR-DSDS working mode of the dual cards, FDD mode antenna switching cannot be supported.

[0044] Figure 2 For Figure 1 The application schematic diagram of the shown radio frequency system. As Figure 2 shown, the radio frequency system includes:

[0045] LMH LFEM, switchably connected to the first antenna or the second antenna, for receiving radio frequency signals in the LTE MHB frequency band;

[0046] MHB LPAMID, switchably connected to the first antenna or the second antenna, for transmitting and receiving radio frequency signals in the N41 frequency band;

[0047] ENDC MMPA (EUTRAN R Dual-Connectivity, E-UTRA dual connectivity) (Multi-band Multi-mode Power Amplifier, MMPA), which is switchably connected to the third antenna or the fourth antenna and is used for transmitting and receiving radio frequency signals in the N41 frequency band;

[0048] MHB MIMO LFEM, which is switchably connected to the third antenna or the fourth antenna and is used for transmitting and receiving radio frequency signals in the MHB frequency band;

[0049] LNA BANK, which is connected to the fourth antenna and is used for receiving radio frequency signals in the N41 frequency band;

[0050] In Figure 2 In the structure shown, ENDC MMPA can be switchably connected to the third antenna or the fourth antenna through the first filter; LNA BANK can be connected to the fourth antenna through the second filter. The first filter and the second filter are both used to filter out interference signals from the received radio frequency signals and retain the radio frequency signals in the N41 frequency band.

[0051] Figure 2 The provided radio frequency system is a common radio frequency front-end architecture in the N41 frequency band for mobile phone terminals. The antennas used for Card 1 are the first antenna and the second antenna, and the antennas used for Card 2 are the third antenna and the fourth antenna. Under N41 SA (Standalone, independent networking), it supports two-way transmission and four-way reception (2T4R) in the N41 frequency band. To improve the user experience, it is required that N41 SA can support four-way antenna switching (ASDIV) during operation. Additionally, since the position of ANT4 is relatively far, an external LNA (Low Noise Amplifier) is used to improve the N41 reception performance of this path.

[0052] When Card 1 operates in the N41 SA mode and Card 2 operates in MHB, if N41 of Card 1 switches to ANT1, at this time, LMHLFEM receives MHB paging through the ANT1 path, causing a conflict between the N41 transmission function of MHB LPAMID and the reception of MHB paging. At this time, if it is necessary to support the paging reception of Card 2 MHB, N41 will not be able to support four-way ASDIV and can only support two-way antenna switching ASDIV, ultimately affecting the user experience.

[0053] Based on the above analysis, the embodiments of the present application provide the following solutions, including:

[0054] Figure 3 This is a schematic diagram of the radio frequency system provided by the embodiments of the present application. As Figure 3 shown, the radio frequency system includes:

[0055] An antenna assembly, comprising a first antenna, a second antenna, a third antenna and a fourth antenna;

[0056] A first radio frequency path, switchably connected to the first antenna or the second antenna, for transmitting and receiving radio frequency signals in a first frequency band by using the first antenna, and for receiving radio frequency signals in the first frequency band by using the second antenna;

[0057] A second radio frequency path, switchably connected to the third antenna or the fourth antenna, for transmitting and receiving radio frequency signals in a first frequency band by using the third antenna, and for receiving radio frequency signals in the first frequency band by using the fourth antenna;

[0058] A receiving path, switchably connected to the third antenna or the fourth antenna, for receiving radio frequency signals in a first frequency band.

[0059] In Figure 3 the system shown, the radio frequency system can support two-way transmission (TX) and four-way reception (RX) of radio frequency signals in a first frequency band, specifically including:

[0060] The transmission function of radio frequency signals in the first frequency band provided by the first antenna;

[0061] The transmission function of radio frequency signals in the first frequency band provided by the third antenna;

[0062] The reception function of radio frequency signals in the first frequency band provided by the first antenna;

[0063] The reception function of radio frequency signals in the first frequency band provided by the second antenna;

[0064] The reception function of radio frequency signals in the first frequency band provided by the third antenna

[0065] The reception function of radio frequency signals in the first frequency band provided by the fourth antenna.

[0066] Combined with Figure 1 and Figure 3 , it can be seen by comparison that in the radio frequency system provided by the embodiment of the present application, the receiving path is switchably connected to the third antenna or the fourth antenna.

[0067] In Figure 3 the structure shown, the first radio frequency path can be used as the signal transmission of card 1, and the second radio frequency path and the receiving path can be used as the signal transmission of card 2.

[0068] Since the receiving path is switchably connected to the third antenna or the fourth antenna, when antenna switching occurs in the second RF path, the receiving path can also perform antenna switching along with the second RF path, so as to achieve the purpose that both the transmitting path and the receiving path perform antenna switching, and thus achieve antenna switching in the FDD mode.

[0069] Furthermore, since card 2 can support switching in the FDD mode, card 1 can also support antenna switching in the FDD mode. Therefore, the entire RF system can support antenna switching in the FDD mode.

[0070] The RF path corresponding to card 1 in the above RF system will be described below:

[0071] Figure 4(a) is Figure 3 the first schematic diagram of the shown RF system. As shown in Figure 4(a), the RF system further includes:

[0072] An antenna switch module (Antenna Switch Module, ASW), where the antenna switch module has a first end and two second ends. The first end is connected to the first RF path, one second end is connected to the first antenna, and the other second end is connected to the second antenna, and is used to control the conduction state between the first end and the second ends.

[0073] In the system shown in Figure 4(a), the first RF path is switchably connected to the first antenna or the second antenna in the following manner, including:

[0074] If the antenna switch module controls the first end and one second end to be in a conducting state, the first RF path performs transceiver operations of RF signals in the first frequency band through the first antenna; if the antenna switch module controls the first end and the other second end to be in a conducting state, the first RF path performs receiving operations of RF signals in the first frequency band through the second antenna.

[0075] By setting the antenna switch module, the first RF path can be switchably connected to the first antenna or the second antenna.

[0076] Figure 4(b) is Figure 3 the second schematic diagram of the shown RF system. As shown in Figure 4(b), the RF system further includes:

[0077] A switch control circuit, having two first ends and two second ends; where one first end is connected to the second RF path, the other first end is connected to the receiving path, one second end is connected to the third antenna, and the other second end is connected to the fourth antenna, and is used to control the conduction state between the first ends and the second ends of the switch control circuit.

[0078] In the system shown in Fig. 4(b), the second RF path is switchably connected to the third antenna or the fourth antenna in the following manner, including:

[0079] If a first end and a second end of the switch control circuit are in a conducting state, the second RF path uses the third antenna to perform transceiver operations of RF signals in the first frequency band;

[0080] If a first end and another second end of the switch control circuit are in a conducting state, the second RF path uses the fourth antenna to perform reception operations of RF signals in the first frequency band.

[0081] In the system shown in Fig. 4(b), the receiving path is switchably connected to the third antenna or the fourth antenna in the following manner, including:

[0082] If another first end and a second end of the switch control circuit are in a conducting state, the receiving path uses the third antenna to perform reception operations of RF signals in the first frequency band;

[0083] If another first end and another second end of the switch control circuit are in a conducting state, the fourth RF path uses the fourth antenna to perform reception operations of RF signals in the third frequency band.

[0084] By setting the switch control circuit, it is possible to realize that the second RF path is switchably connected to the third antenna or the fourth antenna, and the second RF path is switchably connected to the third antenna or the fourth antenna.

[0085] In addition, when performing the antenna switching operation, since one second end of the switch control circuit is connected to the third antenna and the other second end is connected to the fourth antenna, the switch control circuit can switch the RF path connected to the first end between the third antenna and the fourth antenna by controlling the antenna connected to the second end.

[0086] Fig. 4(c) is Figure 3 the third schematic diagram of the shown RF system. As shown in Fig. 4(c), the switch control circuit includes a first switching device and a second switching device; wherein both the first switching device and the second switching device have two first ends and two second ends; wherein:

[0087] The first switching device is used to control the first end and the second end of the first switching device to be in a conducting state;

[0088] The second switching device is used to control the first end and the second end of the second switching device to be in a conducting state;

[0089] Wherein, one first end of the first switching device is connected to the second radio frequency path, another first end of the first switching device is connected to one second end of the second switching device, one second end of the first switching device is connected to the third antenna, and another second end of the first switching device is connected to one first end of the second switching device;

[0090] Another first end of the second switching device is connected to the receiving path, and another second end of the second switching device is connected to the fourth antenna.

[0091] In the system shown in Fig. 4(c), the second radio frequency path is switchably connected to the third antenna or the fourth antenna in the following manner, including:

[0092] If one first end of the first switching device and one second end of the first switching device are in a conducting state, the second radio frequency path performs radio frequency signal transceiver operations in the first frequency band through the third antenna;

[0093] If one first end of the first switching device and another second end of the first switching device are in a conducting state, and one first end of the second switching device and another second end of the second switching device are in a conducting state, the second radio frequency path performs radio frequency signal receiving operations in the first frequency band through the fourth antenna.

[0094] In the system shown in Fig. 4(c), the receiving path is switchably connected to the third antenna or the fourth antenna in the following manner, including:

[0095] If another first end of the second switching device and one second end of the second switching device are in a conducting state, and another first end of the first switching device and one second end of the first switching device are in a conducting state, the second radio frequency path performs radio frequency signal receiving operations in the first frequency band through the third antenna

[0096] If another first end of the second switching device and another second end of the second switching device are in a conducting state, the second radio frequency path performs radio frequency signal receiving operations in the first frequency band through the fourth antenna.

[0097] By setting the first switching device and the second switching device, it is possible to realize that the second radio frequency path is switchably connected to the third antenna or the fourth antenna, and the second radio frequency path is switchably connected to the third antenna or the fourth antenna.

[0098] Specifically, the other first end of the first switching device is connected to one second end of the second switching device, such that the receiving path can be connected to the other first end of the first switching device through the second switching device. Since the second end of the first switching device is connected to the first antenna, the receiving path can be connected to the first antenna in a switchable manner by means of the first switching device.

[0099] Figure 5 is Figure 3 the fourth schematic diagram of the radio frequency system shown. As Figure 5 shown, the radio frequency system further includes:

[0100] A third radio frequency path, switchably connected to the third antenna or the fourth antenna, for performing transceiver operations on radio frequency signals in the second frequency band.

[0101] The third radio frequency path can perform transceiver of radio frequency signals in the second frequency band through the third antenna or the fourth antenna, and is also used for signal transmission of Card 2, and is independent of the path for transceiver of radio frequency signals in the first frequency band in Card 2.

[0102] The third radio frequency path can be switchably connected to the third antenna or the fourth antenna in the following manner, including:

[0103] Method 1:

[0104] FIG. 6(a) is Figure 5 the first schematic diagram of the radio frequency system shown. As shown in FIG. 6(a), the radio frequency system further includes a third switching device, where the third switching device has a first end and two second ends. The first end is connected to the third radio frequency path, one second end is connected to the third antenna, and the other second end is connected to the fourth antenna, for controlling the first end and the second ends of the third switching device to be in a conducting state.

[0105] Specifically, if the first end of the third switching device is in a conducting state with the one second end, the third radio frequency path performs transceiver operations on radio frequency signals in the second frequency band through the third antenna; if the first end of the third switching device is in a conducting state with the other second end of the third switching device, the third radio frequency path performs transceiver operations on radio frequency signals in the second frequency band through the fourth antenna.

[0106] As can be seen from the above, by separately providing a switching device between the third radio frequency path and the antenna, the third radio frequency path can be switchably connected to the third antenna or the fourth antenna.

[0107] Method 2:

[0108] FIG. 6(b) is Figure 5The second schematic diagram of the radio frequency system shown. As shown in Figure 6(b), the switch control circuit further has a third first terminal, and the third first terminal is connected to the third radio frequency path.

[0109] Specifically, if the third first terminal of the switch control circuit is in a conducting state with a second terminal of the switch control circuit, the third radio frequency path performs radio frequency signal transceiver operations in the second frequency band through the third antenna; if the third first terminal of the switch control circuit is in a conducting state with another second terminal of the switch control circuit, the third radio frequency path performs radio frequency signal transceiver operations in the second frequency band through the fourth antenna.

[0110] By adding a new port to the switch control circuit, the third radio frequency path can be switchably connected to the third antenna or the fourth antenna, enabling the second radio frequency path, the third radio frequency path, and the receiving path to all complete switching between the third antenna and the fourth antenna through this switch control circuit, improving the hardware integration level.

[0111] Figure 6(c) is Figure 5 The third schematic diagram of the radio frequency system shown. As shown in Figure 6(c), when the second radio frequency path and the receiving path achieve antenna switching through the first switching device and the second switching device, the first switching device further has a third first terminal;

[0112] Specifically, if the third first terminal of the first switching device is in a conducting state with a second terminal of the first switching device, the third radio frequency path performs radio frequency signal transceiver operations in the second frequency band through the third antenna; if the third first terminal of the first switching device is in a conducting state with another second terminal, and a first terminal of the second switching device is in a conducting state with another second terminal of the second switching device, the third radio frequency path performs radio frequency signal transceiver operations in the second frequency band through the fourth antenna.

[0113] By adding a new port to the first switching device, the third radio frequency path can be switchably connected to the third antenna or the fourth antenna, enabling the second radio frequency path, the third radio frequency path, and the receiving path to all complete switching between the third antenna and the fourth antenna through this switch control circuit, improving the hardware integration level.

[0114] Figure 7 For Figure 3 The fifth schematic diagram of the radio frequency system shown. As Figure 5 shown, the radio frequency system further includes:

[0115] A fourth radio frequency path, switchably connected to the first antenna or the second antenna, for performing radio frequency signal transceiver operations in the third frequency band.

[0116] In Figure 7 In the structure shown, the fourth RF path can be used to transmit and receive RF signals in the first frequency band through the first antenna or the second antenna, and is also used for signal transmission of Card 1, and is independent of the path in Card 1 for transmitting and receiving RF signals in the first frequency band.

[0117] The third RF path can be switchably connected to the first antenna or the second antenna in the following manner, including:

[0118] Method 1:

[0119] Fig. 8(a) is a first schematic diagram of the Figure 7 shown RF system. As shown in Fig. 8(a), the RF system further includes a fourth switching device, where the fourth switching device has a first end and two second ends, the first end is connected to the fourth RF path, one second end is connected to the first antenna, and the other second end is connected to the second antenna, and is used to control the first end and the second end of the fourth switching device to be in a conducting state.

[0120] Specifically, if the first end of the fourth switching device is in a conducting state with one second end, the fourth RF path performs the operation of transmitting and receiving RF signals in the third frequency band through the first antenna; if the first end of the fourth switching device is in a conducting state with the other second end of the fourth switching device, the fourth RF path performs the operation of transmitting and receiving RF signals in the third frequency band through the fourth antenna.

[0121] From the above, by separately providing a switching device between the fourth RF path and the antenna, the fourth RF path can be switchably connected to the first antenna or the second antenna.

[0122] Method 2:

[0123] Fig. 8(b) is a second schematic diagram of the Figure 7 shown RF system. As shown in Fig. 8(b), the antenna switch module further has another first end, where the other first end is connected to the fourth RF path.

[0124] Specifically, when the other first end of the antenna switch module is in a conducting state with one second end, the fourth RF path uses the first antenna to transmit and receive RF signals in the third frequency band; when the other first end of the antenna switch module is in a conducting state with the other second end, the fourth RF path uses the second antenna to transmit and receive RF signals in the third frequency band.

[0125] By adding a new port to the antenna switch module, the first RF path and the fourth RF path can be selectively connected to the first antenna or the second antenna, enabling both the first RF path and the fourth RF path to complete the switching between the first antenna and the second antenna through the antenna switch module, thus improving the hardware integration level.

[0126] Preferably, if the first RF path is provided in the RF front-end device, the antenna switch module is integrated into the RF front-end device to improve the circuit integration level and reduce the wiring difficulty.

[0127] Please refer to Figure 5 the structure shown. The first end of the first switching device needs to be provided with at least 3 ports, which are respectively connected to the second RF path, the third RF path, and the second end of the second switching device; the second end of the first switching device needs to be provided with at least 2 ports, which are respectively connected to the third antenna and the first end of the second switching device. Based on the requirement of the number of the above ports, the first switching device is a DP4T or 3P3T.

[0128] Please refer to Figure 5 the structure shown. The first end of the second switching device needs to be provided with at least 2 ports, which are respectively connected to the receiving path and the second end of the first switching device, and the second end of the second switching device needs to be provided with at least 2 ports, which are respectively connected to the first end of the first switching device and the fourth antenna. Based on the requirement of the number of the above ports, the second switching device is a DPDT.

[0129] Optionally, the receiving path includes:

[0130] an LNA for amplifying the RF signal of the first frequency band received.

[0131] The RF signal of the first frequency band is amplified by the LNA to facilitate the signal processing of the RF module and improve the signal processing efficiency.

[0132] Optionally, filters are also provided in the second RF path and the receiving path for filtering out interference signals other than the RF signal of the first frequency band.

[0133] The following is illustrated by the application example provided in the embodiment of the present application:

[0134] Figure 9 is the architecture diagram of the RF system provided in the embodiment of the present application. As Figure 9 shown, the RF system can implement the dual SIM dual standby function, that is, the RF paths corresponding to the first antenna and the second antenna serve as the data transmission paths of card 1; the third antenna and the fourth antenna serve as the data transmission links of card 2.

[0135] In the RF path corresponding to Card 1, the fourth RF path described above is implemented using LMHB LFEM, the first RF path described above is implemented using MHBLpamid, and the switching between the first antenna and the second antenna is achieved through the built-in antenna switch module ASW of MHB Lpamid;

[0136] In the RF path corresponding to Card 2, the second RF path described above is implemented using ENDC MMPA and N41 filters, the third RF path described above is implemented using MHB MIMO LFEM, and the receiving path described above is implemented using LNA Bank, LNA, and N41 filters.

[0137] 3P3T or DPDT can be selected as the first switching device, and DPDT can be selected as the second switching device.

[0138] From Figure 9 the control of the N41 RF front-end device shown, under N41 SA, 2 transmit and 4 receive (2T4R) are supported.

[0139] Assume Figure 9 that the receiving path in

[0140] can only be connected to the fourth antenna. In the DR-DSDS (Dual Receive Dual SIM Standby) operating mode, if Card 1 operates in N41 SA (stand alone) only and Card 2 operates in MHB, when the working antenna of Card 1 switches from the second antenna to the first antenna, that is, when Card 1 operates in the cross state, it will conflict with the MHB paging reception of Card 2. At this time, if Card 2 MHB is to support receiving paging, N41 will not be able to support 4-way ASDIV and can only support 2-way antenna switching ASDIV, ultimately affecting the user experience.

[0141] In the application example of this application, Figure 9 the receiving path in

[0142] Since the radio frequency system can support 4-way ASDIV under dual-card DRDSDS in the N41 frequency band, even if the radio frequency transmission branch of the first frequency band of card 2 switches to the cross state, the MHB can still be realized and received through the second receiving branch, solving the problem of resource conflict under dual cards.

[0143] Based on the working principle of N41 under dual cards, using the switching device in the radio frequency front-end device, the problem that 4-antenna switching cannot be realized for N41 due to resource conflict under dual cards is solved, and the user experience can be effectively improved when the performance of the N41 transmitting antenna in the mobile phone terminal is affected by the external environment (such as when held in the hand).

[0144] Figure 10 It is a schematic diagram of the radio frequency communication method provided by the embodiment of the present application. As Figure 10 shown, the method is applied to the radio frequency system described in any of the above, and includes:

[0145] Step 1001, detecting whether an antenna switching operation occurs in the first radio frequency path;

[0146] Step 1002, if the first radio frequency path switches from the second antenna to the first antenna, controlling both the second radio frequency path and the receiving path to perform antenna switching operations.

[0147] In a dual-card dual-standby system, as the radio frequency path of card 1, the first radio frequency path performs transceiver operations of radio frequency signals in the first frequency band through the first antenna, and the first radio frequency path uses the second antenna to perform receiving operations of radio frequency signals in the first frequency band.

[0148] If the first radio frequency path switches from the second antenna to the first antenna, it means that both the transmission path and the receiving path of the first frequency band in the first radio frequency path need to be switched to the first antenna.

[0149] If card 1 is to support FDD mode antenna switching, the transmission path and the receiving path of the first frequency band in card 2 also need to support FDD mode switching. Therefore, by controlling both the second radio frequency path and the receiving path to perform antenna switching operations, FDD mode antenna switching of card 2 can be realized. On the premise that card 2 supports FDD mode antenna switching based on radio frequency signals in the first frequency band, card 1 can also support FDD mode antenna switching based on radio frequency signals in the first frequency band. Therefore, both the transmission path and the receiving path of the first frequency band in the first radio frequency path can be switched to the first antenna.

[0150] Further, the controlling both the second radio frequency path and the receiving path to perform antenna switching operations includes:

[0151] Send a control signal to the switch control circuit, where the control signal is used to switch the conduction of the switch control circuit from one of the third antenna and the fourth antenna to the other one of the third antenna and the fourth antenna.

[0152] By controlling the conduction state of the switch control circuit, the purpose of antenna switching can be simply and conveniently achieved.

[0153] An embodiment of the present application provides a storage medium, in which a computer program is stored, and wherein the computer program is configured to execute the method described in any one of the above when running.

[0154] An embodiment of the present application provides an electronic device, including a memory and a processor, where a computer program is stored in the memory, and the processor is configured to run the computer program to execute the method described in any one of the above.

[0155] Those of ordinary skill in the art can understand that all or some of the steps in the methods disclosed above, and the functional modules / units in the systems and devices, can be implemented as software, firmware, hardware, and their appropriate combinations. In the hardware implementation, the division of the functional modules / units mentioned above does not necessarily correspond to the division of physical components; for example, a physical component can have multiple functions, or a function or step can be executed by several physical components in cooperation. Some components or all components can be implemented as software executed by a processor, such as a digital signal processor or a microprocessor, or as hardware, or as an integrated circuit, such as an application-specific integrated circuit. Such software can be distributed on a computer-readable medium, which can include a computer storage medium (or a non-transitory medium) and a communication medium (or a transitory medium). As is well known to those of ordinary skill in the art, the term computer storage medium includes volatile and non-volatile, removable and non-removable media implemented in any method or technology for storing information, such as computer-readable instructions, data structures, program modules, or other data. Computer storage media includes, but is not limited to, RAM, ROM, EEPROM, flash memory or other memory technologies, CD-ROM, digital versatile discs (DVDs) or other optical disc storage, magnetic cassettes, magnetic tapes, magnetic disk storage or other magnetic storage devices, or any other medium that can be used to store the desired information and can be accessed by a computer. In addition, as is well known to those of ordinary skill in the art, a communication medium typically includes computer-readable instructions, data structures, program modules, or other data in a modulated data signal such as a carrier wave or other transmission mechanism, and can include any information delivery medium.

Claims

1. A radio frequency system, characterized in that, Comprising: An antenna assembly, including a first antenna, a second antenna, a third antenna, and a fourth antenna; A first RF path, switchably connected to the first antenna or the second antenna, for performing transceiver operations on RF signals in a first frequency band using the first antenna, and for receiving RF signals in the first frequency band using the second antenna; A second RF path, switchably connected to the third antenna or the fourth antenna, for performing transceiver operations on RF signals in the first frequency band using the third antenna, and for receiving RF signals in the first frequency band using the fourth antenna; A receiving path, switchably connected to the third antenna or the fourth antenna, for receiving RF signals in the first frequency band; Wherein, the first RF path is for transmitting RF signals of Card 1, and the second RF path and the receiving path are for transmitting RF signals of Card 2; Wherein, when the first RF path switches from the second antenna to the first antenna, both the second RF path and the receiving path perform antenna switching operations.

2. The radio frequency system according to claim 1, characterized in that The receiving path includes: A low-noise amplifier for amplifying RF signals in the first frequency band.

3. The RF system according to claim 1 or 2, characterized in that, The RF system further includes: A third RF path, switchably connected to the third antenna or the fourth antenna, for performing transceiver operations on RF signals in a second frequency band.

4. The radio frequency system according to claim 3, wherein The RF system further includes: A fourth RF path, switchably connected to the first antenna or the second antenna, for performing transceiver operations on RF signals in a third frequency band.

5. The radio frequency system according to claim 4, characterized in that, The RF system further includes: An antenna switch module having two first ends and two second ends. One first end is connected to the first RF path, the other first end is connected to the fourth RF path, one second end is connected to the first antenna, and the other second end is connected to the second antenna, for controlling the first ends and second ends of the antenna switch module to be in a conducting state.

6. The RF system according to claim 1, wherein The RF system further includes: A switch control circuit having two first ends and two second ends; one first end is connected to the second RF path, the other first end is connected to the receiving path, one second end is connected to the third antenna, and the other second end is connected to the fourth antenna, for controlling the first ends and second ends of the switch control circuit to be in a conducting state.

7. The radio frequency system according to claim 6, wherein The switch control circuit includes a first switch device and a second switch device; both the first switch device and the second switch device have two first ends and two second ends; wherein: The first switch device is for controlling the first ends and second ends of the first switch device to be in a conducting state; The second switch device is for controlling the first ends and second ends of the second switch device to be in a conducting state; Wherein, one first end of the first switch device is connected to the second RF path, the other first end of the first switch device is connected to one second end of the second switch device, one second end of the first switch device is connected to the third antenna, and the other second end of the first switch device is connected to one first end of the second switch device; The other first end of the second switching device is connected to the receiving path, and the other second end of the second switching device is connected to the fourth antenna.

8. The radio frequency system according to claim 7, wherein: The first switching device is DP4T or 3P3T; The second switching device is DPDT.

9. A radio frequency communication method, characterized in that, Applied to the radio frequency system according to any one of claims 1 to 8, including: Detecting whether an antenna switching operation occurs in the first radio frequency path; If the first radio frequency path switches from the second antenna to the first antenna, controlling both the second radio frequency path and the receiving path to perform antenna switching operations.

10. The method according to claim 9, wherein: The radio frequency system further includes: a switch control circuit having two first ends and two second ends; wherein, one first end is connected to the second radio frequency path, the other first end is connected to the receiving path, one second end is connected to the third antenna, and the other second end is connected to the fourth antenna, and is used to control the first end and the second end of the switch control circuit to be in a conducting state; The controlling both the second radio frequency path and the receiving path to perform antenna switching operations includes: Sending a control signal to the switch control circuit, the control signal being used to switch the conduction of the switch control circuit from one of the third antenna and the fourth antenna to the other of the third antenna and the fourth antenna.

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