Radio frequency system, transformation method thereof and electronic equipment

Abstract

The invention relates to a radio frequency system, a transformation method thereof and electronic equipment, and relates to the technical field of wireless communication. The problem of high cost of a radio frequency system is solved. The radio frequency system comprises a radio frequency chip, a first power amplification unit, a first signal processing unit, a second power amplification unit, a second signal processing unit and a first switching unit. The first power amplification unit includes a first amplification device, and the second power amplification unit includes a second amplification device and a third amplification device. When the first switching unit is in the first state, the first signal processing unit and the first amplifying device are conducted, and the first signal processing unit and the second amplifying device are separated. And when the first switching unit is in the second state, the first signal processing unit is conducted with the second amplifying device and is separated from the first signal processing unit and the first amplifying device. The radio frequency system is used for solving the problem of high cost caused by more hardware structures in the radio frequency system.

Description

[0001] This application is a divisional application. The application number of the original application is 202310765286.1, and the original application date is June 26, 2023. The entire contents of the original application are incorporated into this application by reference. Technical Field

[0002] The present disclosure relates to the field of wireless communication technology, and in particular to a radio frequency system and a modification method thereof, and an electronic device. Background Art

[0003] With the rapid development of communication technology, wireless communication technology is being used more and more widely, so the number of antennas deployed in electronic devices is also increasing. For example, an electronic device supporting the fifth generation mobile communication technology (5G) is internally provided with multiple antennas.

[0004] In order to cater to the trend of multi-antenna design of electronic devices, the number of RF systems on the internal circuit boards of electronic devices is increasing, and the arranged hardware structures are also increasing. The current RF system has a large number of hardware structures and has a high cost problem. Summary of the invention

[0005] The embodiments of the present application provide a radio frequency system and a modification method thereof, and an electronic device, which are used to solve the problem that the radio frequency system has more hardware structures and thus leads to higher costs.

[0006] To achieve the above objectives, the embodiments of the present application adopt the following technical solutions:

[0007] In the first aspect, a radio frequency system is provided. The radio frequency system includes: a radio frequency chip, a first power amplifier unit, a first signal processing unit, a second power amplifier unit, a second signal processing unit and a first switching unit. The first power amplifier unit is coupled to the radio frequency chip. The first power amplifier unit includes a first amplifier device, and the first amplifier device is used to amplify and process a first radio frequency signal provided by the radio frequency chip. The second power amplifier unit is coupled to the radio frequency chip. The second power amplifier unit includes a second amplifier device and a third amplifier device. The second amplifier device is used to amplify and process the first radio frequency signal, and the third amplifier device is used to amplify and process the second radio frequency signal provided by the radio frequency chip. The second signal processing unit is coupled to the third amplifier device. The first switching unit is coupled to the first signal processing unit, the first amplifier device and the second amplifier device respectively. The first switching unit switches between a first state and a second state. When the first switching unit is in the first state, the first signal processing unit is connected to the first amplifier device and the first signal processing unit is disconnected from the second amplifier device. When the first switching unit is in the second state, the first signal processing unit is connected to the second amplifier device and disconnected from the first amplifier device of the first signal processing unit.

[0008] For ease of understanding, the following explanation will be given by taking the example that the first RF signal may be an RF signal in the n41 frequency band, the first signal processing unit may be a filter, for example; the filter may be a filter for processing the n41 frequency band signal; the second RF signal may be an RF signal in the B3 frequency band, and the second signal processing unit may be a duplexer, for example; the duplexer may be a duplexer for processing the B3 frequency band signal.

[0009] The first switching unit can be coupled to the first power amplification unit, the second power amplification unit and the filter respectively. The first switching unit switches between a first state and a second state. When the first switching unit is in the first state, the filter is turned on with the first amplification device of the first power amplification unit and the filter is disconnected from the second amplification device of the second power amplification unit, so that the filter only performs filtering processing on the uplink RF signal Tn41 provided by the first power amplification unit. When the first switching unit is in the second state, the filter is turned on with the second amplification device of the second power amplification unit and the filter is disconnected from the first amplification device of the first power amplification unit, so that the filter only performs filtering processing on the uplink RF signal Tn41 provided by the second power amplification unit.

[0010] When the first switching unit is in the first state, the filter is connected to the first amplifying device of the first power amplifying unit.

[0011] The first power amplifier unit obtains the uplink RF signal Tn41 of the n41 frequency band provided by the first port in the RF chip. After the first amplifier device in the first power amplifier unit amplifies the uplink RF signal Tn41, the uplink RF signal Tn41 is provided to the filter when the first state switcher is in the uplink state. The filter performs signal processing on the amplified uplink RF signal Tn41 provided by the first power amplifier unit. Thus, the transmission of the uplink RF signal Tn41 at the front end of the RF system is completed.

[0012] The second power amplifier unit obtains the uplink RF signal TB3 of the B3 frequency band provided by the third port in the RF chip, and the third amplifier device in the second power amplifier unit amplifies the uplink RF signal TB3 and provides it to the duplexer. The duplexer performs signal processing on the amplified uplink RF signal TB3 provided by the second power amplifier unit. Thus, the transmission of the uplink RF signal TB3 at the front end of the RF system is completed.

[0013] At the same time, since the filter is separated from the second amplifying device of the second power amplifying unit, the filter will not be affected by the amplified uplink RF signal Tn41 provided by the second power amplifying unit, thereby ensuring the reliability of the filter's signal processing of the uplink RF signal Tn41 provided by the first power amplifying unit.

[0014] When the first switching unit is in the second state, the filter is connected to the second amplifying device of the second power amplifying unit.

[0015] The second power amplifier unit obtains the uplink RF signal Tn41 of the n41 frequency band provided by the third port in the RF chip. After the second amplifier device in the second power amplifier unit amplifies the uplink RF signal Tn41, the uplink RF signal Tn41 is provided to the filter when the second state switcher is in the uplink state. The filter performs signal processing on the amplified uplink RF signal Tn41 provided by the second power amplifier unit. Thus, the transmission of the uplink RF signal Tn41 at the front end of the RF system is completed.

[0016] The second power amplifier obtains the uplink RF signal TB3 of the B3 frequency band provided by the third port in the RF chip, and the third amplifier device in the second power amplifier unit amplifies the uplink RF signal TB3 and provides it to the duplexer. The duplexer performs signal processing on the amplified uplink RF signal TB3 provided by the second power amplifier unit. Thus, the transmission of the uplink RF signal TB3 at the front end of the RF system is completed.

[0017] At the same time, since the filter is separated from the first amplifying device of the first power amplifying unit, the filter will not be affected by the amplified uplink RF signal Tn41 provided by the first power amplifying unit, thereby ensuring the reliability of the filter's signal processing of the uplink RF signal Tn41 provided by the second power amplifying unit.

[0018] In this way, when the first switching unit is in the first state, the radio frequency system is an architecture in which two uplinks use two power amplifier units respectively. When the first switching unit is in the second state, the radio frequency system is an architecture in which two uplinks share one power amplifier unit. By switching the first switching unit from the first state to the second state, at least the first power amplifier unit in the radio frequency system can be simplified, thereby reducing the number of hardware devices in the radio frequency system, reducing the difficulty of the hardware layout of the radio frequency system and reducing the cost of the radio frequency system.

[0019] In some feasible implementations, the first switching unit includes a first terminal, a second terminal and a third terminal. The first terminal is coupled to the first signal processing unit, the second terminal is coupled to the first amplifying device, and the third terminal is coupled to the second amplifying device.

[0020] When the first switching unit is in the first state, the first terminal is conductively connected to the second terminal and the first terminal is disconnected from the third terminal.

[0021] When the second switching unit is in the second state, the first terminal is conductively connected to the third terminal and the first terminal is disconnected from the second terminal.

[0022] When the first switching unit is in the first state, the first terminal is connected to the second terminal and the first terminal is disconnected from the third terminal, so that the filter is connected to the first amplifying device of the first power amplifying unit and the filter is disconnected from the second amplifying device of the second power amplifying unit. When the first switching unit is in the second state, the first terminal is connected to the third terminal and the first terminal is disconnected from the second terminal, so that the filter is connected to the second amplifying device of the second power amplifying unit and the filter is disconnected from the first amplifying device of the first power amplifying unit.

[0023] In some feasible implementations, the radio frequency system further includes a low noise amplifier bank (LNA BANK), which is coupled to the first signal processing unit and the second signal processing unit respectively.

[0024] When the first switching unit is in the first state, when the filter obtains the downlink RF signal Rn41 of the n41 frequency band provided by the back-end circuit interface, the filter processes the downlink RF signal Rn41, and then provides the downlink RF signal Rn41 to the LNA BANK when the first state switch is in the downlink state. After the LNA BANK amplifies the downlink RF signal Rn41 provided by the filter, it provides the amplified downlink RF signal Rn41 to the fifth port of the RF chip. Thus, the transmission of the downlink RF signal Rn41 at the front end of the RF system is completed.

[0025] When the duplexer obtains the downlink RF signal RB3 of the B3 frequency band provided by the back-end circuit interface, the duplexer distinguishes the downlink RF signal RB3 from the uplink RF signal TB3, and provides the downlink RF signal RB3 to the LNA BANK. After the LNABANK amplifies the downlink RF signal RB3 provided by the duplexer, it provides the amplified downlink RF signal RB3 to the fifth port of the RF chip. Thus, the transmission of the downlink RF signal RB3 at the front end of the RF system is completed.

[0026] When the first switching unit is in the second state, when the filter obtains the downlink RF signal Rn41 of the n41 frequency band provided by the back-end circuit interface, the filter processes the downlink RF signal Rn41, and then provides the downlink RF signal Rn41 to the LNA BANK when the second state switch is in the downlink state. After the LNA BANK amplifies the downlink RF signal Rn41 provided by the filter, it provides the amplified downlink RF signal Rn41 to the fifth port of the RF chip. Thus, the transmission of the downlink RF signal Rn41 at the front end of the RF system is completed.

[0027] When the duplexer obtains the downlink RF signal RB3 of the B3 frequency band provided by the back-end circuit interface, the duplexer distinguishes the downlink RF signal RB3 from the uplink RF signal TB3, and provides the downlink RF signal RB3 to the LNA BANK. After the LNABANK amplifies the downlink RF signal RB3 provided by the duplexer, it provides the amplified downlink RF signal RB3 to the fifth port of the RF chip. Thus, the transmission of the downlink RF signal RB3 at the front end of the RF system is completed.

[0028] Since the noise coefficient of LNA BANK is very low, when amplifying weak signals, LNA BANK can minimize the interference of its own noise on the signal and improve the signal-to-noise ratio of the amplified downlink RF signal.

[0029] In some feasible implementations, the first radio frequency signal belongs to a time division duplex frequency band. The radio frequency system also includes a first state switcher and a second state switcher. The first state switcher is coupled to the second terminal and the low noise amplification unit, respectively. The first state switcher switches between an uplink state and a downlink state. When the first state switcher is in an uplink state, the second terminal is isolated from the low noise amplification unit. When the first state switcher is in a downlink state, the low noise amplification unit is connected to the second terminal.

[0030] The second state switcher is coupled to the third terminal and the low noise amplifying unit respectively. The second state switcher switches between an up state and a down state. When the second state switcher is in an up state, the third terminal is disconnected from the low noise amplifying unit. When the second state switcher is in a down state, the low noise amplifying unit is connected to the third terminal.

[0031] In the case where the radio frequency system includes a first state switch, the first state switch is coupled to the second terminal and the LNA BANK respectively. When the first state switch is in an uplink state, the second terminal is isolated from the LNA BANK; when the first state switch is in a downlink state, the LNA BANK is connected to the second terminal so that the LNA BANK is connected to the filter.

[0032] In the case where the radio frequency system includes a second state switch, the second state switch is coupled to the third terminal and the LNA BANK respectively. When the second state switch is in an uplink state, the third terminal is isolated from the LNA BANK; when the second state switch is in a downlink state, the LNA BANK is connected to the third terminal so that the LNA BANK is connected to the filter.

[0033] When the first switching unit of the radio frequency system is in the first state, the first state switcher can control the LNA BANK to obtain the downlink radio frequency signal from the filter and process it. When the first switching unit of the radio frequency system is in the second state, the second state switcher can control the LNA BANK to obtain the downlink radio frequency signal from the filter and process it. In this way, it can be ensured that when the first radio frequency signal belongs to the time division duplex frequency band, the processing of the downlink radio frequency signal can be completed normally regardless of the state of the first switching unit.

[0034] In some feasible implementations, the low noise amplification unit includes a low noise amplification device. The first state switcher and the second state switcher are respectively coupled to different ports of the same low noise amplification device.

[0035] The first state switch and the second state switch can be coupled to different ports of the same low noise amplifier device of the low noise amplifier unit. The first state switch and the second state switch provide the filtered downlink radio frequency signal Rn41 to the low noise amplifier device in a time-sharing manner.

[0036] By coupling the first state switch and the second state switch to different ports of the same low noise amplifier device, the same low noise amplifier device can be shared, reducing the hardware quantity and cost of the radio frequency system. At the same time, the downlink radio frequency signals of the first switching unit in different states are transmitted through independent signal channels respectively, improving the reliability of signal transmission.

[0037] In some feasible implementations, the RF chip includes a first feedback port and a second feedback port. The RF system also includes: a first coupler, a second coupler, and a second switching unit. The first coupler is coupled to the first signal processing unit; the first coupler is used to obtain at least part of the first RF signal. The second coupler is coupled to the second signal processing unit and the second feedback port, respectively; the second coupler is used to obtain at least part of the second RF signal and transmit it to the second feedback port. The second switching unit is coupled to the first coupler, the first feedback port, and the second feedback port, respectively. The second switching unit switches between a first state and a second state. When the second switching unit is in the first state, the first coupler is connected to the first feedback port and the first coupler is disconnected from the second feedback port. When the second switching unit is in the second state, the first coupler is connected to the second feedback port and the first coupler is disconnected from the first feedback port.

[0038] The RF chip includes a second port and a fourth port. The second port has a binding relationship with the first port, and the fourth port has a binding relationship with the third port. The uplink of the n41 frequency band and the uplink of the B3 frequency band are not distinguished. The RF chip can adjust the power of the uplink RF signal Tn41 output by the third port based on the sampling signal of the n41 frequency band received by the fourth port. The RF chip can also adjust the power of the uplink RF signal TB3 output by the third port based on the sampling signal of the B3 frequency band received by the fourth port.

[0039] The second switching unit can be coupled to the first coupler, the second port and the fourth port respectively. The second switching unit switches between a first state and a second state. When the second switching unit is in the first state, the first coupler is connected to the second port and the first coupler is disconnected from the fourth port. When the second switching unit is in the second state, the first coupler is connected to the fourth port and the first coupler is disconnected from the second port.

[0040] When the second switching unit is in the first state. The first coupler is coupled to the filter, and can be coupled to at least part of the amplified uplink RF signal Tn41 to form a sampling signal of the n41 frequency band. In this way, the sampling signal of the n41 frequency band of the first coupler is transmitted to the second port, which enables the RF chip to adjust the power and other parameters of the uplink RF signal Tn41 output from the first port according to the sampling signal of the n41 frequency band. Thereby, the transmission of the sampling signal of the n41 frequency band in the RF system is completed. The second coupler is coupled to the duplexer, and can be coupled to at least part of the amplified uplink RF signal TB3 to form a sampling signal of the B3 frequency band. In this way, the sampling signal of the B3 frequency band of the second coupler is transmitted to the fourth port, which enables the RF chip to adjust the power and other parameters of the uplink RF signal TB3 output from the third port according to the sampling signal of the B3 frequency band. Thereby, the transmission of the sampling signal of the B3 frequency band in the RF system is completed. At the same time, due to the separation between the first coupler and the fourth port, the fourth port will not receive the sampling signal of the n41 frequency band provided by the first coupler, thereby ensuring that when the RF chip adjusts the power of the uplink RF signal Tn41 output from the first port based on the sampling signal of the n41 frequency band of the second port, it will not be interfered by the sampling signal of the n41 frequency band of the fourth port, thereby improving the reliability of the RF chip's adjustment of the signal power of the uplink RF signal Tn41. The RF chip adjusts the output power of the uplink RF signal Tn41 output from the first port based on the sampling signal of the n41 frequency band received by the second port; the RF chip adjusts the output power of the uplink RF signal TB3 output from the third port based on the sampling signal of the B3 frequency band received by the fourth port.

[0041] When the second switching unit is in the second state. The first coupler is coupled to the filter, and can be coupled to at least part of the amplified uplink RF signal Tn41 to form a sampling signal of the n41 frequency band. In this way, the sampling signal of the n41 frequency band of the first coupler is transmitted to the fourth port, which enables the RF chip to adjust the power and other parameters of the uplink RF signal Tn41 output from the third port according to the sampling signal of the n41 frequency band. Thereby completing the transmission of the sampling signal of the n41 frequency band in the RF system. The second coupler is coupled to the duplexer, and can be coupled to at least part of the amplified uplink RF signal TB3 to form a sampling signal of the B3 frequency band. In this way, the sampling signal of the B3 frequency band of the second coupler is transmitted to the fourth port, which enables the RF chip to adjust the power and other parameters of the uplink RF signal TB3 output from the third port according to the sampling signal of the B3 frequency band. Thereby completing the transmission of the sampling signal of the B3 frequency band in the RF system. Exemplarily, the sampling signal of the n41 frequency band of the first coupler is a combiner, and the sampling signal of the B3 frequency band of the second coupler is transmitted to the combiner. The sampling signal of the n41 frequency band and the sampling signal of the B3 frequency band are combined by the combiner and output to the fourth port. At the same time, due to the partition between the first coupler and the second port, the second port will not receive the sampling signal of the n41 frequency band provided by the first coupler, thereby ensuring that when the RF chip adjusts the power of the uplink RF signal Tn41 output from the third port based on the sampling signal of the n41 frequency band of the fourth port, it will not be interfered by the sampling signal of the n41 frequency band of the second port, thereby improving the reliability of the RF chip in adjusting the signal power of the uplink RF signal Tn41. The RF chip adjusts the output power of the uplink RF signal Tn41 output from the third port based on the sampling signal of the n41 frequency band received by the fourth port; the RF chip adjusts the output power of the uplink RF signal TB3 output from the third port based on the sampling signal of the B3 frequency band received by the fourth port.

[0042] When the first switching unit switches from the first state to the second state, the uplink of the uplink RF signal Tn41 and the uplink of the uplink RF signal TB3 both pass through the second power amplification unit. By coupling the first coupler to the fourth port through the second switching unit, the RF chip can adjust the output power of the uplink RF signal Tn41 output from the third port based on the sampling signal of the n41 frequency band received by the fourth port. Thereby, the accuracy of the output power of the n41 frequency band in the RF system is improved.

[0043] In some feasible implementations, the second switching unit includes a fourth terminal, a fifth terminal and a sixth terminal. The fourth terminal is coupled to the first coupler, the fifth terminal is coupled to the first feedback port, and the sixth terminal is coupled to the second feedback port.

[0044] When the second switching unit is in the first state, the fourth terminal is connected to the fifth terminal and the fourth terminal is disconnected from the sixth terminal. When the second switching unit is in the second state, the fourth terminal is connected to the sixth terminal and the fourth terminal is disconnected from the fifth terminal.

[0045] In some feasible implementations, the radio frequency system further includes a signal combiner. The signal combiner is coupled to the first coupler, the second coupler, and the second feedback port, respectively. The signal combiner is used to combine at least part of the first radio frequency signal and at least part of the second radio frequency signal and transmit the combined signals to the second feedback port.

[0046] The signal combiner may include a combiner, but is certainly not limited to a combiner. Other hardware devices with signal combining functions should also be considered as signal combiners.

[0047] The signal combiner is used to combine the sampling signal of the n41 frequency band provided by the first coupler and the sampling signal of the B3 frequency band provided by the second coupler, and provide the combined signals to the fourth port.

[0048] In some feasible implementations, the first radio frequency signal is a new radio (NR, also known as a new air interface) signal, and the second radio frequency signal is a long term evolution (LTE) signal. The radio frequency system also includes a first radio frequency power supply, a second radio frequency power supply and a third switching unit.

[0049] The first radio frequency power supply is coupled to the first power amplification unit; the first radio frequency power supply supports high power user equipment (HPUE) function.

[0050] The third switching unit is coupled to the second power amplification unit, the second RF power supply and the first RF power supply respectively. The third switching unit switches between a first state and a second state. When the third switching unit is in the first state, the second power amplification unit is connected to the second RF power supply and the second power amplification unit is disconnected from the first RF power supply. When the third switching unit is in the second state, the second power amplification unit is connected to the first RF power supply and the second power amplification unit is disconnected from the second RF power supply.

[0051] The first RF power supply is a RF power supply that supports the HPUE function, and the second RF power supply is a RF power supply that does not support the HPUE function. In the case where the RF system is an architecture in which two power amplifier units are used for two uplinks respectively, the RF signal of the n41 frequency band processed by the first power amplifier unit belongs to the NR signal, so the first RF power supply that supplies power to the first power amplifier unit is a RF power supply that supports the HPUE function. The RF signal of the B3 frequency band processed by the second power amplifier unit belongs to the LTE signal, and the second RF power supply that supplies power to the second power amplifier unit does not need to support the HPUE function. Since the price of the RF power supply that supports the HPUE function is higher than that of the RF power supply that does not support the HPUE function, in order to save costs, the second RF power supply of the RF system is a RF power supply that does not support the HPUE function.

[0052] The third switching unit is coupled to the second power amplification unit, the first RF power supply, and the second RF power supply, respectively. The third switching unit switches between a first state and a second state. When the third switching unit is in the first state, the second power amplification unit is connected to the first RF power supply and the second power amplification unit is disconnected from the second RF power supply. When the third switching unit is in the second state, the second power amplification unit is connected to the second RF power supply and the second power amplification unit is disconnected from the first RF power supply.

[0053] When the first switching unit is in the first state, the first power amplifier unit is used to process the uplink RF signal Tn41 of the n41 frequency band, and the second power amplifier unit is used to process the uplink RF signal TB3 of the B3 frequency band. At this time, the third switching unit is in the first state, so that the first RF power supply with HPUE function supplies power to the first power amplifier unit to ensure that the first power amplifier unit amplifies the uplink RF signal Tn41 normally. The second RF power supply without HPUE function supplies power to the second power amplifier unit, which can also enable the second power amplifier unit to amplify the uplink RF signal TB3 normally.

[0054] When the first switching unit is in the second state, the first power amplification unit does not work, and the second power amplification unit is used to process the uplink RF signal Tn41 of the n41 frequency band and the uplink RF signal TB3 of the B3 frequency band. At this time, the third switching unit is in the second state, so that the first RF power supply with HPUE function supplies power to the second power amplification unit to ensure that the second power amplification unit amplifies the uplink RF signal Tn41 normally, and the second power amplification unit can also amplify the uplink RF signal TB3 normally.

[0055] It can be understood that in order to reduce the cost of the RF system, when only the first RF power supply is a RF power supply that supports the HPUE function and the second RF power supply is a cheap RF power supply that does not support the HPUE function, a third switching unit is added to the RF system. The third switching unit can control the first RF power supply to supply power to the power amplifier 1 when the first power amplifier unit processes the uplink RF signal Tn41; the third switching unit can also control the first RF power supply to supply power to the power amplifier 1 when the first power amplifier unit does not work and the second power amplifier unit processes the uplink RF signal Tn41.

[0056] In this way, it can be ensured that there is always an RF power supply supporting the HPUE function to amplify the power amplifier in the uplink RF signal Tn41, ensuring the normal operation of the uplink in the n41 frequency band of the RF system and improving the reliability of the RF system.

[0057] In some feasible implementations, the third switching unit includes a seventh terminal, an eighth terminal and a ninth terminal. The seventh terminal is coupled to the second power amplification unit, the eighth terminal is coupled to the second RF power supply, and the ninth terminal is coupled to the first RF power supply.

[0058] When the third switching unit is in the first state, the seventh terminal is conductively connected to the eighth terminal and the seventh terminal is disconnected from the ninth terminal.

[0059] When the third switching unit is in the second state, the seventh terminal is connected to the ninth terminal and the seventh terminal is disconnected from the eighth terminal.

[0060] When the third switching unit is in the first state, the seventh terminal is connected to the eighth terminal and the seventh terminal is disconnected from the ninth terminal, so that the second power amplification unit is connected to the second RF power supply and the second power amplification unit is disconnected from the first RF power supply. When the third switching unit is in the second state, the seventh terminal is connected to the ninth terminal and the seventh terminal is disconnected from the eighth terminal, so that the second power amplification unit is connected to the first RF power supply and the second power amplification unit is disconnected from the second RF power supply.

[0061] In some feasible implementations, the first switching unit and the third switching unit may be in the same working state. It is understandable that when the first switching unit is in the first state, the third switching unit may be in the first state; when the first switching unit is in the second state, the third switching unit may be in the second state.

[0062] Exemplarily, when the radio frequency system includes a first switching unit, a second switching unit and a third switching unit at the same time, the first switching unit, the second switching unit and the third switching unit can be in the first state at the same time; or, the first switching unit, the second switching unit and the third switching unit can be in the second state at the same time.

[0063] In some feasible implementations, the radio frequency system further includes a second switching unit and a third switching unit. At least one of the first switching unit, the second switching unit, and the third switching unit includes a jumper tray.

[0064] The jumper board has a simple structure and low cost, and can reduce the cost of the radio frequency system while realizing the functions of the first switching unit, the second switching unit and the third switching unit.

[0065] In a second aspect, a radio frequency system is provided. The radio frequency system includes a radio frequency chip, a second power amplification unit, a first signal processing unit, a second signal processing unit and a first switching unit. The second power amplification unit is coupled to the radio frequency chip, and the second power amplification unit includes a second amplification device and a third amplification device. The second amplification device is used to amplify and process the first radio frequency signal provided by the radio frequency chip, and the third amplification device is used to amplify and process the second radio frequency signal provided by the radio frequency chip. The second signal processing unit is coupled to the third amplification device. The first switching unit is coupled to the first signal processing unit and the second amplification device, respectively. The first switching unit switches between a first state and a second state. When the first switching unit is in the first state, the first signal processing unit is isolated from the second amplification device. When the first switching unit is in the second state, the first signal processing unit is connected to the second amplification device.

[0066] The modified RF system has an architecture in which two uplinks share one power amplifier unit, which can realize time-sharing processing of the first RF signal and the second RF signal. At the same time, compared with the RF system of the first aspect, the amount of hardware is reduced, thereby reducing the difficulty of arranging the RF system on the circuit board and the cost of the RF system.

[0067] In some feasible implementations, the RF chip includes a first feedback port and a second feedback port. The RF system also includes: a first coupler, a second coupler, and a second switching unit. The first coupler is coupled to the first signal processing unit, respectively; the first coupler is used to obtain at least part of the first RF signal. The second coupler is coupled to the second signal processing unit and the second feedback port, respectively; the second coupler is used to obtain at least part of the second RF signal and transmit it to the second feedback port. The second switching unit is coupled to the first coupler, the first feedback port, and the second feedback port, respectively. The second switching unit switches between a first state and a second state. When the second switching unit is in the first state, the first coupler is connected to the first feedback port and the first coupler is disconnected from the second feedback port. When the second switching unit is in the second state, the first coupler is coupled to the second feedback port and the first coupler is disconnected from the first feedback port.

[0068] The modified RF system has an architecture in which two uplinks share one power amplifier unit, which can realize time-sharing processing of the first RF signal and the second RF signal. At the same time, compared with the RF system of the first aspect, the amount of hardware is reduced, thereby reducing the difficulty of arranging the RF system on the circuit board and the cost of the RF system.

[0069] In some feasible implementations, the RF system further includes: a first RF power supply and a third switching unit. The third switching unit is coupled to the first RF power supply and the second power amplification unit respectively; the third switching unit switches between a first state and a second state, and when the third switching unit is in the first state, the first RF power supply is disconnected from the second power amplification unit; when the third switching unit is in the second state, the first RF power supply is connected to the second power amplification unit.

[0070] The modified RF system has an architecture in which two uplinks share one power amplifier unit and one RF power supply, which can realize time-sharing processing of the first RF signal and the second RF signal. At the same time, compared with the RF system of the first aspect, the amount of hardware is reduced, thereby reducing the difficulty of arranging the RF system on the circuit board and the cost of the RF system.

[0071] In a third aspect, a method for modifying a radio frequency system is provided. The method includes: providing a radio frequency system before modification, wherein the radio frequency system before modification includes any radio frequency system in the first aspect. Setting a first switching unit to a second state. Removing a first power amplification unit. Obtaining a modified radio frequency system.

[0072] The first switching unit is set to be in the second state. Exemplarily, the first switching unit is switched from the first state to the second state. Exemplarily, the first switching unit is kept in the second state. The order of the step of removing the first power amplification unit and the step of setting the first switching unit to be in the second state is not limited.

[0073] In this way, when the architecture of the two uplinks of the radio frequency system is transformed from two power amplifier units to one power amplifier unit for the two uplinks, there is no need to redesign and transform the circuit board carrying the radio frequency system during the transformation of the radio frequency system, which can save the cost required for transforming the circuit board, antenna design and the overall architecture of the electronic device, and shorten the time required for mass production of the electronic device. At the same time, the first power amplifier unit can also be recycled to reduce the cost of the radio frequency system.

[0074] In some feasible implementations, the radio frequency system before modification includes a first coupler, a second coupler, and a second switching unit. The method further includes: setting the second switching unit to a second state.

[0075] In this way, when the architecture of the two uplinks of the RF system using two power amplifier units is transformed into an architecture in which the two uplinks share one power amplifier unit, there is no need to redesign and transform the circuit board carrying the RF system during the transformation of the RF system, which can save the cost required to transform the circuit board, antenna design and the overall architecture of the electronic equipment, and shorten the time required for mass production of the electronic equipment.

[0076] In some feasible implementations, the RF system before modification includes a first RF power supply, a second RF power supply, and a third switching unit. Before obtaining the RF system after modification, the method further includes: setting the third switching unit to a second state. Removing the second RF power supply.

[0077] In this way, when the two uplinks of the RF system are transformed from the architecture of using two power amplifier units and two RF power supplies to the architecture of using one power amplifier unit and one RF power supply for the two uplinks, there is no need to redesign and transform the circuit board carrying the RF system during the transformation of the RF system, which can save the cost required for transforming the circuit board, antenna design and the overall architecture of the electronic device, and shorten the time required for mass production of the electronic device. At the same time, the second RF power supply can also be recycled to reduce the cost of the RF system.

[0078] In a fourth aspect, an electronic device is provided. The electronic device includes: a circuit board, an antenna, a housing, and a radio frequency system as described in any one of the first aspect or a radio frequency system as described in any one of the second aspect. The antenna includes an antenna shrapnel and an antenna radiator that are in contact with each other, the antenna shrapnel and the radio frequency system are both located on the circuit board and coupled to each other, and the antenna radiator is located on the housing.

[0079] The technical effects of the fourth aspect can refer to the technical effects of the first aspect or the second aspect, and will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0080] Figure 1 A schematic diagram of the structure of an electronic device provided for some embodiments of the present application;

[0081] Figure 2 This is a schematic diagram of the structure of a radio frequency system that supports both NSA and SA network modes in some embodiments of the present application;

[0082] Figure 3 This is a schematic diagram of the structure of a radio frequency system supporting the SA network standard in some embodiments of the present application;

[0083] Figure 4 A schematic diagram of the structure of a radio frequency system provided for some embodiments of the present application;

[0084] Figure 5 for Figure 4 The signal schematic diagram of the radio frequency system shown in the figure is in the first state of the first switching unit;

[0085] Figure 6 for Figure 4 The signal schematic diagram of the radio frequency system shown in the figure is in the second state of the first switching unit;

[0086] Figure 7 For Figure 4 A simplified structural diagram of the radio frequency system shown;

[0087] Figure 8 For Figure 4 The schematic diagram of the structure of the radio frequency system after the radio frequency system is transformed shown;

[0088] Fig. 9 A schematic diagram of the structure of a radio frequency system provided for other embodiments of the present application;

[0089] Fig.10 for Fig. 9 The signal schematic diagram of the radio frequency system shown in the second switching unit is in the first state;

[0090] Fig.11 for Fig. 9The signal schematic diagram of the radio frequency system when the second switching unit is in the second state is shown;

[0091] Fig.12 For Fig. 9 The schematic diagram of the structure of the radio frequency system after the radio frequency system is transformed shown;

[0092] Fig.13 A schematic diagram of the structure of a radio frequency system provided for other embodiments of the present application;

[0093] Fig.14 for Fig.13 The signal schematic diagram of the radio frequency system shown is when the third switching unit is in the first state;

[0094] Fig.15 for Fig.13 A signal schematic diagram of the radio frequency system when the third switching unit is in the second state;

[0095] Fig.16 For Fig.13 A simplified structural diagram of the radio frequency system shown;

[0096] Fig.17 For Fig.13 The schematic diagram of the structure of the radio frequency system after the radio frequency system is transformed shown;

[0097] Fig.18 A schematic diagram of the structure of a radio frequency system provided for other embodiments of the present application. DETAILED DESCRIPTION

[0098] The technical solutions in the embodiments of the present application will be described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments.

[0099] The following will be combined with the accompanying drawings to clearly and completely describe the technical solutions in some embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments provided by the present application, all other embodiments obtained by ordinary technicians in this field belong to the scope of protection of the present application.

[0100] In the following, the terms "first" and "second" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the embodiments of the present application, unless otherwise specified, "plurality" means two or more.

[0101] When describing some embodiments, the expressions "connected", "connected" and their derivatives may be used. For example, when describing some embodiments, the term "connected" may be used to indicate that two or more components are in direct or indirect physical contact with each other. For example, A and B are connected, which may mean that A and B are connected, or that A and B are connected through other components. In addition, the term "coupled" may be a way of achieving electrical connection for signal transmission.

[0102] “At least one of A, B, and C” has the same meaning as “at least one of A, B, or C” and both include the following combinations of A, B, and C: A only, B only, C only, the combination of A and B, the combination of A and C, the combination of B and C, and the combination of A, B, and C.

[0103] “A and / or B” includes the following three combinations: A only, B only, and a combination of A and B.

[0104] As used herein, "about," "substantially," or "approximately" includes the stated value and an average value that is within an acceptable range of variation from the particular value as determined by one of ordinary skill in the art taking into account the measurements in question and the errors associated with the measurement of the particular quantity (i.e., the limitations of the measurement system).

[0105] To facilitate understanding, some descriptions of concepts related to the embodiments of the present application are exemplarily given for reference.

[0106] 1. Frequency band: The frequency range of radio frequency signals (radio waves). Some of the frequency bands involved in the fourth generation mobile communication technology (4G) / fifth generation mobile communication technology (5G) are shown in Table 1.

[0107]

[0108]

[0109] Table 1

[0110] 2. Time division duplexing (TDD): It is a duplex mode of a communication system, which is used to separate the receiving and transmitting channels (or uplink and downlink) in mobile communication systems. In a TDD mode mobile communication system, reception and transmission are in different time slots of the same frequency channel, i.e., the carrier, and the receiving and transmitting channels are separated by guaranteed time.

[0111] It is understood that electronic devices will not simultaneously transmit and receive radio frequency signals in the same frequency band using TDD transmission. Time division duplexing is also called half-duplexing.

[0112] The embodiments of the present application are applicable to radio frequency signals transmitted in TDD form. The frequency bands transmitted in TDD form in 5G communication include: n77 frequency band, n78 frequency band, n79 frequency band and n41 frequency band, etc.

[0113] 3. Frequency division duplexing (FDD): It is a duplex mode of a communication system, which means that the uplink (mobile station to base station) and the downlink (base station to mobile station) use two separate frequencies (with frequency intervals) to operate. This mode operates on a symmetrical frequency band.

[0114] It is understandable that the electronic device can simultaneously transmit and receive radio frequency signals of different frequency bands transmitted in FDD mode.

[0115] The embodiments of the present application are applicable to radio frequency signals transmitted in FDD form. The frequency bands transmitted in FDD form in 4G communication include: B1 frequency band, B3 frequency band and B7 frequency band, etc.; the frequency bands transmitted in FDD form in 5G communication include: n1 frequency band, n3 frequency band and n7 frequency band, etc.

[0116] 4. Antenna: A converter. The antenna is used to convert RF signals into electromagnetic waves of corresponding wavelengths and radiate them into the air; and / or, to receive electromagnetic waves and convert them into corresponding RF signals. It is understandable that the same antenna can both transmit and receive RF signals. RF signals can include: LTE signals and NR signals, etc.

[0117] 5. Radio frequency integrated circuit (RFIC): used to output radio frequency signals and perform signal processing on radio frequency signals received by the antenna. Signal processing includes but is not limited to frequency conversion, demodulation, and analog-to-digital conversion. The radio frequency chip may include: frequency division duplexer, time division duplexer, switch and / or combiner, etc. Both FDD and TDD are used to separate the uplink radio frequency signal and the downlink radio frequency signal in the link, reducing the interference between the uplink radio frequency signal and the downlink radio frequency signal. The combiner can divide one signal into two signals, which is convenient for subsequent separation and processing of different signals. The processing process of the radio frequency signal is not limited or explained in the embodiment of the present application.

[0118] Figure 1 A schematic diagram of the structure of an electronic device provided in some embodiments of the present application is shown.

[0119] Electronic devices may include, but are not limited to, electronic devices with wireless communication technology, such as laptop computers, mobile phones, smart phones, tablet computers, smart car devices, navigators, sports cameras, smart home appliances, artificial intelligence devices, wearable devices, or virtual reality / augmented reality / mixed reality devices, etc.

[0120] In recent years, with the development of communication technology, the application of wireless communication technology in electronic devices has become more and more extensive, and wireless communication technology has also been continuously iterated and updated. It should be understood that the electronic device mentioned in the embodiments of the present application can be applied to various communication systems, such as: 5G communication system, global system of mobile communication (GSM) system, code division multiple access (CDMA) system, CDMA2000 system, wideband code division multiple access (WCDMA) system, general packet radio service (GPRS) system, long term evolution (LTE) system, advanced long term evolution (LTE-A) system, universal mobile telecommunication system (UMTS), enhanced data rate for GSM evolution (EDGE), high speed packet access (HSPA), time division-synchronous code division multiple access (TD-SCDMA), wireless local area network (WLAN), Bluetooth, global positioning system (GPS), near field communication (NFC), etc. Field communication (FC) system, etc., the embodiments of the present application are not limited to this.

[0121] Electronic devices usually include a baseband system and a radio frequency system. The baseband system is used to generate baseband signals, and the radio frequency system is used to convert the baseband signals into radio frequency signals, so as to transmit the radio frequency signals into a wireless channel through an antenna.

[0122] In some embodiments of the present application, Figure 1 As shown, the electronic device 100 may include a circuit board 10, an antenna 20, a housing 30, and a radio frequency system 40. The antenna 20 includes an antenna radiator 21 and an antenna shrapnel 22. The antenna shrapnel 22 may be located on the circuit board 10 of the electronic device 100, and one end of the antenna shrapnel 22 extends outside the circuit board 10 and directly contacts the antenna radiator 21.

[0123] The RF system 40 is coupled to the antenna shrapnel 22 on the circuit board 10. After receiving the RF signal, the antenna shrapnel 22 transmits the RF signal to the antenna radiator 21 through conductive contact, so that the antenna radiator 21 radiates electromagnetic wave signals outward based on the RF signal.

[0124] The antenna radiator 21 may be located on the housing 30 , and the antenna radiator 21 may penetrate the housing 30 so as to radiate electromagnetic wave signals to a space outside the housing 30 .

[0125] With the rapid development of communication technology, 5G mobile communication technology has gradually entered the lives of Internet users, and more and more electronic devices support access to 5G networks.

[0126] 5G networking modes include non-standalone (NSA) mode and standalone (SA) mode. In NSA mode, the 5G base station that transmits signals is still connected to the 4G network, and the 5G base station and the 4G base station coexist in the entire network architecture. Some communication functions still need to be implemented with the help of the 4G base station, so it is called "non-standalone" networking. In SA mode, electronic devices will simultaneously support 5G network communication. The 5G base station that transmits signals does not need to be connected to the 4G network. In the entire network architecture, the 5G base station is independent of the 4G base station, and the communication function is completely implemented through the 5G base station, so it is called "standalone" networking.

[0127] Currently, electronic devices on the market that support 5G wireless communication functions (hereinafter referred to as 5G electronic devices) all support both NSA and SA network standards. For example, a 5G electronic device is a mobile phone that supports both NSA and SA network standards. This mobile phone is also commonly called a 5G dual-mode mobile phone.

[0128] For electronic devices that support both NSA and SA network standards, the core of supporting NSA network standard is to support evolved universal mobile telecommunications system (UMTS) terrestrial radio access network (Evolved UMTS terrestrial radio access network, E-UTRAN) and NR's dual connectivity technology (E-UTRAN New Radio-dual connectivity, ENDC).

[0129] For ENDC, the RF system that supports two of the low band (LB), middle band (MB) and high band (HB) is relatively complex; while for the ENDC combination consisting of ultra high band (UHB) and any of the frequencies of LB, MB and HB, since the circuit structure corresponding to UHB is an independent structure, the overall RF system is relatively simple. The embodiments of this application are described later by taking the complex RF system of the combination of two of LB, MB and HB as an example.

[0130] Figure 2 The figure shows a schematic diagram of the structure of a radio frequency system that supports both NSA and SA network standards. Figure 2 The hardware circuit is described in detail by taking the ENDC combination (DC_3A_n41A) in which the RF system supports both the intermediate frequency B3 band and the high frequency n41 band as an example.

[0131] like Figure 2 As shown, the RF system includes an RF chip, two RF power supplies (RF power supply 1 and RF power supply 2), two power amplifiers (PA1 and PA2), a filter, a duplexer, two couplers (coupler 1 and coupler 2), and a low noise amplifier unit module (low noise amplifier bank, LNA BANK).

[0132] Among them, the power amplifier PA1, the filter, the coupler 1 and the LNA BANK belong to the uplink and downlink of the RF signal of the n41 frequency band. The RF power supply 1 is coupled to the power amplifier PA1 to power the power amplifier PA1. The power amplifier PA2, the duplexer, the coupler 2 and the LNA BANK belong to the uplink and downlink of the RF signal of the B3 frequency band. The RF power supply 2 is coupled to the power amplifier PA2 to power the power amplifier PA2.

[0133] The RF chip includes a first port TX1, a second port (first feedback port) MRX1, a third port TX0, a fourth port (second feedback port) and a fifth port RX. The first port TX1 is used to output a RF signal in the n41 frequency band. The second port MRX1 is used to receive a sampling signal of the RF signal in the n41 frequency band from coupler 1 to adjust the output power and other parameters of the first port TX1. The third port TX0 is used to output a RF signal in the B3 frequency band. The fourth port MRX0 is used to receive a sampling signal of the RF signal in the B3 frequency band from coupler 2 to adjust the output power and other parameters of the third port TX0. The fifth port RX is used to receive a RF signal in the B3 frequency band and a RF signal in the n41 frequency band provided by an external signal source.

[0134] The power amplifier PA1 is coupled to the first port TX1 of the RF chip, and is used to amplify the uplink RF signal Tn41 of the n41 frequency band output by the RF chip. Since the signal of the n41 frequency band is a high frequency band signal, the power amplifier PA1 at least includes an amplifier device for processing the high frequency band (for example, a die before the chip is packaged). Exemplarily, the power amplifier PA1 only includes an amplifier device for processing the high frequency band; for another example, the power amplifier PA1 may include an amplifier device for processing the high frequency band, an amplifier device for processing the mid-frequency band, and / or an amplifier device for processing the low frequency band.

[0135] Since the power amplifier PA1 processes the n41 frequency band, the RF power supply 1 that supplies power to the power amplifier PA1 needs to be a RF power supply that supports high power user equipment (HPUE) functions. For example, the RF power supply 1 supports voltages above 3.4V and supports a 30KHz sub-carrier space (SCS).

[0136] It should be noted that whether the RF power supply needs to support the HPUE function may depend on the signal frequency band processed by the power amplifier powered by the RF power supply. The signal frequency band that the RF power supply needs to support the HPUE function may be the frequency band of the NR signal or the frequency band of the LTE signal, and the embodiments of the present application do not limit this.

[0137] Since the n41 frequency band belongs to the TDD frequency band, the uplink and downlink in the uplink and downlink work in the same frequency in time division, so a first state switch Q1 can also be included between the power amplifier PA1 and the filter. The first state switch Q1 can be coupled to the filter and the LNA BANK respectively. When the first state switch Q1 is in the uplink state, the LNA BANK is disconnected from the filter; when the first state switch Q1 is in the downlink state, the LNA BANK is connected to the filter to form a downlink transmission path.

[0138] In some feasible embodiments, the first state switch Q1 may also be integrated inside the power amplifier PA1, which is not limited in the embodiments of the present application.

[0139] The filter is coupled to the power amplifier PA1. When the first state switch Q1 is in the uplink state, the filter is used to filter out the clutter in the uplink RF signal Tn41 of the n41 frequency band after amplification. The coupler 1 is coupled to the filter and the second port MRX1 of the RF chip respectively. The coupler 1 is used to collect at least part of the uplink RF signal of the n41 frequency band to form a sampling signal of the n41 frequency band, and transmit the sampling signal of the n41 frequency band to the second port MRX1 of the RF chip.

[0140] The coupler 1 can also be coupled to the back-end circuit interface 1, and the back-end circuit interface 1 can be connected to an antenna, etc., which is not limited here. When the back-end circuit interface 1 is connected to an antenna, the antenna can radiate the uplink RF signal Tn41 in the n41 frequency band to the external environment.

[0141] The coupler 1 can also be cascaded with the uplink and downlink of other frequency bands when the uplink and downlink of the n41 frequency band radio frequency signal are not working, which is not limited here.

[0142] When the back-end circuit interface 1 is connected to an antenna, the antenna can also convert microwaves in the n41 frequency band in the external environment into a downlink radio frequency signal Rn41 and provide it to the filter through the coupler 1. The filter can also filter out clutter in the downlink radio frequency signal Rn41. Exemplarily, both the uplink and downlink of the n41 frequency band include filters.

[0143] It can be understood that the uplink of the n41 frequency band and the downlink of the n41 frequency band share the filter. In this way, the hardware quantity of the RF system can be reduced, thereby reducing the cost of the RF system. Of course, without considering the cost, a separate filter can also be added to filter out the clutter in the downlink RF signal Rn41, and the embodiments of the present application are not limited to this.

[0144] LNA BANK is coupled to the filter and the fifth port RX of the RF chip respectively. When the first state switch Q1 is in the downlink state, LNA BANK amplifies the downlink RF signal Rn41 of the n41 frequency band after filtering, and provides the amplified downlink RF signal Rn41 to the fifth port RX of the RF chip. Exemplarily, LNA BANK includes HB LNA. The filter is coupled to the HB LNA, and the HB LNA amplifies the downlink RF signal Rn41 after filtering, and provides the amplified downlink RF signal Rn41 to the fifth port RX of the RF chip.

[0145] LNA BANK can also be replaced by other hardware devices with amplification function, which is not limited here. Since the noise coefficient of LNA BANK is very low, when amplifying weak signals, LNA BANK can minimize the interference of its own noise on the signal and improve the signal-to-noise ratio of the amplified downlink RF signal Rn41.

[0146] The power amplifier PA2 is coupled to the third port TX0 of the RF chip, and is used to amplify the RF signal of the B3 frequency band output by the RF chip. Since the RF signal of the B3 frequency band is a mid-frequency amplified signal, the power amplifier PA2 at least includes an amplifying device for processing the mid-frequency band. For example, the power amplifier PA2 only includes an amplifying device for processing the mid-frequency band; for another example, the power amplifier PA2 may include an amplifying device for processing the mid-frequency band, an amplifying device for processing the high frequency band, and / or an amplifying device for processing the low frequency band.

[0147] Correspondingly, since the power amplifier PA2 processes the B3 frequency band, the RF power supply 1 that supplies power to the power amplifier PA2 does not need to support the HPUE function. Since the price of the RF power supply that supports the HPUE function is relatively high, in order to save costs, the RF power supply 2 can use a RF power supply that does not support the HPUE function. Of course, if the cost is not taken into account, the RF power supply 2 can also be a RF power supply that supports the HPUE function.

[0148] Since the B3 frequency band belongs to the FDD frequency band, the uplink and downlink of the B3 frequency band radio frequency signal work simultaneously in frequency division, so the uplink and downlink of the B3 frequency band radio frequency signal do not need a state switcher.

[0149] The duplexer is coupled to the power amplifier PA2 and is used to distinguish and isolate the amplified uplink RF signal in the B3 frequency band from the downlink RF signal received by the RF system. The duplexer transmits the uplink RF signal to the coupler 2.

[0150] The coupler 2 is coupled to the duplexer and the fourth port MRX0 of the RF chip respectively. The coupler 2 is used to collect at least part of the uplink RF signal of the B3 frequency band to form a sampling signal of the B3 frequency band, and transmit the sampling signal of the B3 frequency band to the fourth port MRX0 of the RF chip.

[0151] Figure 2 In the figure, the RF chip includes a second port MRX1 and a fourth port MRX0, and the second port MRX1 has a binding relationship with the uplink of the n41 frequency band RF signal, and the fourth port MRX0 has a binding relationship with the uplink of the B3 frequency band RF signal.

[0152] In some other feasible implementations, the second port MRX1 and the fourth port MRX0 of the RF chip can be combined into a feedback port, which does not distinguish between the uplink of the n41 band RF signal and the uplink of the B3 band RF signal. At this time, the RF system may also include a combiner, which may couple coupler 1, coupler 2 and the feedback port respectively. The combiner can simultaneously receive the sampling signal of the B3 band and the sampling signal of the n41 band and provide them to the feedback port of the RF chip after combining.

[0153] Of course, the combiner may also be replaced by other hardware devices with signal combination functions, and the embodiments of the present application are not limited to this.

[0154] The coupler 2 can also be coupled to the back-end circuit interface 2, and the back-end circuit interface 2 can be connected to an antenna, etc., which is not limited here. When the back-end circuit interface 2 is connected to an antenna, the antenna can radiate the uplink radio frequency signal TB3 of the B3 frequency band to the external environment.

[0155] The coupler 2 can also be cascaded with uplinks and downlinks of other frequency bands when the uplinks and downlinks of the B3 frequency band radio frequency signal are not working, which is not limited here.

[0156] When the back-end circuit interface 2 is connected to the antenna, the antenna can also convert the microwaves of the B3 frequency band in the external environment into the downlink RF signal RB3 and provide it to the duplexer through the coupler 2. After the duplexer distinguishes the downlink RF signal RB3 from the uplink RF signal TB3, it transmits the downlink RF signal RB3 to the LNA BANK.

[0157] LNABANK is coupled to the duplexer and the fifth port RX of the RF chip, respectively. After LNABANK amplifies the downlink RF signal RB3 distinguished by the duplexer, it provides the amplified downlink RF signal RB3 to the fifth port RX of the RF chip. Exemplarily, LNABANK includes MB LNA. The duplexer is coupled to MB LNA, and after MB LNA amplifies the filtered downlink RF signal RB3, it provides the amplified downlink RF signal RB3 to the fifth port RX of the RF chip.

[0158] It should be noted that LNABANK may include or may not include LB LNA on the basis of including HB LNA corresponding to n41 frequency band and MB LNA corresponding to B3 frequency band.

[0159] Figure 2The uplink and downlink corresponding to the n41 frequency band in the medium power amplifier PA1 and the uplink and downlink corresponding to the B3 frequency band in the power amplifier PA2 work simultaneously. When the uplink and downlink corresponding to the n41 frequency band work, it is necessary to rely on the LTE network to realize the communication of the NSA network standard.

[0160] On the basis that the RF system as a whole supports the NSA network standard, the uplink and downlink corresponding to the n41 frequency band, as a subset of the RF system, can support the SA network standard. It can be understood that the circuit supporting the SA standard can be regarded as part of the circuit supporting the NSA standard. When the RF system supports the NSA standard, some hardware circuits can also support the SA standard.

[0161] Figure 3 The schematic diagram of the structure of the radio frequency system supporting the SA network standard is shown. Figure 3 The hardware circuit is also described in detail using the example of the RF system supporting both the intermediate frequency B3 band and the high frequency n41 band. The core of supporting the SA network standard is to support NR.

[0162] like Figure 3 As shown, the RF system includes a RF chip, a RF power supply 1, a power amplifier PA2, a filter, a duplexer, two couplers (coupler 1 and coupler 2) and an LNA BANK.

[0163] The power amplifier PA2, filter, coupler 1 and LNA BANK belong to the uplink and downlink of the n41 frequency band, and the power amplifier PA2, duplexer, coupler 2 and LNA BANK belong to the uplink and downlink of the B3 frequency band. The RF power supply 1 is coupled to the power amplifier PA2 to power the power amplifier PA2.

[0164] The RF chip includes a third port TX0, a fourth port MRX0 and a fifth port RX. The third port TX0 is used to output an uplink RF signal Tn41 in the n41 frequency band and an uplink RF signal TB3 in the B3 frequency band. The fourth port MRX0 is used to receive a sampling signal in the n41 frequency band and a sampling signal in the B3 frequency band to adjust the output power and other parameters of the third port TX0. The fifth port RX is used to receive a downlink RF signal RB3 in the B3 frequency band and a downlink RF signal Rn41 in the n41 frequency band provided by an external signal source.

[0165] The power amplifier PA2 is coupled to the third port TX0 of the RF chip, and is used to amplify the uplink RF signal Tn41 in the n41 frequency band output by the RF chip, and is also used to amplify the uplink RF signal TB3 in the B3 frequency band output by the RF chip.

[0166] Exemplarily, the power amplifier PA2 includes at least an amplifying device for processing a high frequency band and an amplifying device for processing a medium frequency band. The amplifying device for processing a high frequency band amplifies an uplink RF signal Tn41 of the n41 frequency band as a high frequency band signal; and the amplifying device for processing a medium frequency band amplifies an uplink RF signal TB3 of the B3 frequency band as a medium frequency band signal.

[0167] In addition, the power amplifier PA2 may include an amplifying device for processing a low frequency band, or may not include an amplifying device for processing a low frequency band.

[0168] Correspondingly, since the power amplifier PA2 processes the n41 frequency band, the RF power supply 1 that supplies power to the power amplifier PA1 may be a RF power supply with a HPUE function.

[0169] Since the n41 frequency band belongs to the TDD frequency band, the uplink and downlink of the n41 frequency band radio frequency signal work in the same frequency in time division, so a second state switch Q2 can also be included between the power amplifier PA2 and the filter. The second state switch Q2 can be coupled to the filter and the LNA BANK respectively. When the second state switch Q2 is in the uplink state, the LNA BANK is isolated from the filter; when the state switch Q2 is in the downlink state, the LNA BANK is connected to the filter to form a downlink transmission path.

[0170] It should be noted that, in some feasible embodiments, the second state switch may also be integrated inside the power amplifier PA2, which is not limited in the embodiments of the present application.

[0171] The filter is coupled to the power amplifier PA2. When the second state switch Q2 is in the uplink state, the filter is used to filter out the clutter in the uplink RF signal Tn41 of the n41 frequency band after amplification. The coupler 1 is coupled to the fourth port MRX0 of the RF chip. The coupler 1 is used to collect at least part of the uplink RF signal Tn41 of the n41 frequency band to form a sampling signal of the n41 frequency band, and transmit the sampling signal of the n41 frequency band to the fourth port MRX0 of the RF chip.

[0172] The coupler 1 can also be coupled to the back-end circuit interface 1, and the back-end circuit interface can be connected to an antenna, etc., which is not limited here. When the back-end circuit interface 1 is connected to an antenna, the antenna can radiate the uplink RF signal Tn41 in the n41 frequency band to the external environment.

[0173] The coupler 1 can also be cascaded with the uplink and downlink of other frequency bands when the uplink and downlink of the n41 frequency band radio frequency signal are not working, which is not limited here.

[0174] When the back-end circuit interface 1 is connected to an antenna, the antenna can also convert microwaves in the n41 frequency band in the external environment into a downlink radio frequency signal Rn41 and provide it to the filter through the coupler 1. The filter can also filter out clutter in the downlink radio frequency signal Rn41. Exemplarily, both the uplink and downlink of the n41 frequency band include filters.

[0175] It can be understood that the uplink of the n41 frequency band and the downlink of the n41 frequency band share the filter. In this way, the hardware quantity of the RF system can be reduced, thereby reducing the cost of the RF system. Of course, without considering the cost, a separate filter can also be added to filter out the clutter in the downlink RF signal Rn41, and the embodiments of the present application are not limited to this.

[0176] The LNA BANK is coupled to the filter and the fifth port RX of the RF chip, respectively. When the second state switch Q2 is in the downlink state, the LNA BANK amplifies the downlink RF signal Rn41 of the n41 frequency band after filtering, and provides the amplified downlink RF signal Rn41 to the fifth port RX of the RF chip. Exemplarily, the LNA BANK includes an HB LNA. The filter is coupled to the HB LNA, and the HB LNA amplifies the downlink RF signal Rn41 after filtering, and provides the amplified downlink RF signal Rn41 to the fifth port RX of the RF chip.

[0177] The first state switch Q1 and the second state switch Q2 can be coupled to different ports of the same HB LNA. The first state switch Q1 and the second state switch Q2 provide the filtered downlink RF signal Rn41 to the HB LNA in a time-sharing manner.

[0178] LNA BANK can also be replaced by other hardware devices with amplification function, which is not limited here. Since the noise coefficient of LNA BANK is very low, when amplifying weak signals, LNA BANK can minimize the interference of its own noise on the signal and improve the signal-to-noise ratio of the amplified downlink RF signal Rn41.

[0179] Since the B3 frequency band belongs to the FDD frequency band, the uplink and downlink of the B3 frequency band radio frequency signal work simultaneously in frequency division, so the uplink and downlink of the B3 frequency band radio frequency signal do not need a state switcher.

[0180] The duplexer is coupled to the power amplifier PA2 and is used to distinguish and isolate the amplified uplink radio frequency signal TB3 in the B3 frequency band from the downlink radio frequency signal RB3 received by the radio frequency system. The duplexer transmits the uplink radio frequency signal TB3 to the coupler 2 .

[0181] The coupler 2 is coupled to the fourth port MRX0 of the RF chip and is used to collect at least part of the uplink RF signal TB3 in the B3 frequency band to form a sampling signal in the B3 frequency band, and transmit the sampling signal in the B3 frequency band to the fourth port MRX0 of the RF chip.

[0182] Figure 3 The fourth port MRX0 of the RF chip does not distinguish between the uplink and downlink of the n41 band RF signal and the uplink and downlink of the B3 band RF signal for explanation. The RF system may also include a combiner, and the combiner may couple the coupler 1, the coupler 2 and the fourth port MRX0 of the RF chip respectively. The combiner may simultaneously receive the sampling signal of the B3 band and the sampling signal of the n41 band and provide them to the fourth port MRX0 of the RF chip after combining. In some other feasible implementations, the RF chip may include a second port MRX1 and a fourth port MRX0, and the second port MRX1 has a binding relationship with the uplink of the n41 band RF signal, and the fourth port MRX0 has a binding relationship with the uplink of the B3 band RF signal, and the coupler 1 provides the sampling signal of the n41 band to the second port MRX1, and the coupler 2 provides the sampling signal of the B3 band to the fourth port MRX0.

[0183] The coupler 2 can also be coupled to the back-end circuit interface 2, and the back-end circuit interface 2 can be connected to an antenna, etc., which is not limited here. When the back-end circuit interface 2 is connected to an antenna, the antenna can radiate the uplink RF signal TX0 in the B3 frequency band to the external environment.

[0184] The coupler 2 can also be cascaded with uplinks and downlinks of other frequency bands when the uplinks and downlinks of the B3 frequency band radio frequency signal are not working, which is not limited here.

[0185] When the back-end circuit interface 2 is connected to the antenna, the antenna can also convert the microwaves of the B3 frequency band in the external environment into the downlink RF signal RB3, and provide the downlink RF signal RB3 to the duplexer through the coupler 2. After the duplexer distinguishes the downlink RF signal RB3 from the uplink RF signal TB3, it transmits the downlink RF signal RB3 to the LNA BANK.

[0186] The LNA BANK is coupled to the duplexer and the fifth port RX of the RF chip, respectively. After the LNA BANK amplifies the downlink RF signal RB3 provided by the duplexer, the amplified downlink RF signal RB3 is provided to the fifth port RX of the RF chip. Exemplarily, the LNA BANK includes an MB LNA. The duplexer is coupled to the MB LNA, and after the MB LNA amplifies the filtered downlink RF signal RB3, the amplified downlink RF signal RB3 is provided to the fifth port RX of the RF chip.

[0187] It should be noted that the LNA BANK may include or may not include the LB LNA on the basis of including the HB LNA corresponding to the n41 frequency band and the MB LNA corresponding to the B3 frequency band.

[0188] Figure 3 The uplink and downlink corresponding to the n41 frequency band in the medium power amplifier PA2 do not work at the same time as the uplink and downlink corresponding to the B3 frequency band. When the uplink and downlink corresponding to the n41 frequency band work, it completely relies on the NR network instead of the LTE network to achieve communication that only supports the SA network standard. When the uplink and downlink corresponding to the n41 frequency band does not work, the uplink and downlink corresponding to the B3 frequency band can work to achieve LTE network communication.

[0189] Figure 2 The RF system supports both NSA and SA network standards. Figure 3 The differences between the RF systems supporting the SA network format are shown in Table 2:

[0190]

[0191] Table 2

[0192] Under the premise of supporting both B3 band communication and n41 band communication, the circuit structure used to support NSA in 5G electronic equipment is more complex than the RF system that supports both LB, MB and HB, while the RF system that only supports SA is simpler. Compared with the circuit structure used to support SA, the complex circuit structure that supports NSA adds at least one RF power supply and one power amplifier, which increases the number of hardware in the RF system, resulting in the occupation of the layout space of the RF system on the circuit board, which is not conducive to the layout design of the circuit board, and also increases the hardware cost of the RF system.

[0193] Since the deployment of 5G networks is not mature yet, in order to ensure the reliability of electronic equipment communication, it is necessary to rely on mature 4G networks, which requires electronic equipment to support the NSA network standard. However, with the evolution of the current 5G network deployment, the dependence of 5G networks on 4G networks is getting lower and lower. In the future, RF systems that support the NSA network standard will become a non-mandatory requirement for electronic equipment, and lower-cost RF systems that only support the SA network standard will become the mainstream trend. In this case, in order to transform the RF system that supports both NSA and SA network standards into a RF system that only supports the SA network standard, manufacturers need to redesign the circuit boards of electronic equipment, which costs huge transformation costs.

[0194] Based on this, embodiments of the present application provide a radio frequency system and a manufacturing method thereof, and an electronic device.

[0195] The embodiments of the present application may be used for any RF architecture design that is transformed from a RF architecture in which two or more uplinks use a corresponding number of power amplifier units respectively to a RF architecture design in which at least two uplinks share one power amplifier unit. For ease of understanding, the example of switching a RF system that supports both NSA and SA network standards to a RF system that only supports SA network standards is continued for explanation. However, it should be noted that the RF system provided in the embodiments of the present application is not limited to the scenario in which a RF system that supports both NSA and SA network standards is switched to a RF system that only supports SA network standards, and can also be applied to the scenario in which a RF system that supports inter-band LTE uplink carrier aggregation (ULCA) is switched to a RF system that does not support inter-band LTE uplink carrier aggregation, as well as other suitable scenarios. The embodiments of the present application are not limited to this.

[0196] Figure 4 A schematic diagram of the structure of a radio frequency system provided in some embodiments of the present application is shown; Figure 5 for Figure 4 The signal schematic diagram of the radio frequency system shown in the figure is in the first state of the first switching unit; Figure 6 for Figure 4 The signal schematic diagram of the radio frequency system shown in the figure is in the second state of the first switching unit; Figure 7 For Figure 4 A simplified structural diagram of the radio frequency system shown; Figure 8 For Figure 4 The structure diagram of the radio frequency system after the radio frequency system is modified is shown.

[0197] Figure 4 The RF system shown in includes two working states. When the RF system is in the first working state, the RF system supports both NSA and SA network standards; when the RF system is in the second working state, the RF system only supports the SA network standard. It can be understood that the circuit structure of the RF system that only supports the SA network standard is compatible with the circuit structure that supports both NSA and SA network standards. When the RF system is subsequently transformed into a RF system that only supports the SA network standard, there is no need to redesign and transform the circuit structure on the circuit board, and it can be achieved by simply switching the working state of the RF system.

[0198] like Figure 4 As shown, the RF system may include an RF chip, two RF power supplies (RF power supply 1 and RF power supply 2), two power amplification units (power amplifier PA1 and power amplifier PA2), a first signal processing unit, a second signal processing unit, two couplers (coupler 1 and coupler 2), a low noise amplification unit (LNA BANK) and a first switching unit K1.

[0199] Among them, the power amplifier PA1, the first signal processing unit, the coupler 1 and the LNA BANK belong to the uplink and downlink of the first RF signal. The RF power supply 1 is coupled to the power amplifier PA1 to power the power amplifier PA1. The power amplifier PA2, the second signal processing unit, the coupler 2 and the LNA BANK belong to the uplink and downlink of the second RF signal. The RF power supply 2 is coupled to the power amplifier PA2 to power the power amplifier PA2.

[0200] For ease of understanding, the following explanation will be given by taking the example that the first RF signal can be an RF signal of the n41 frequency band, the first signal processing unit can be a filter; the second RF signal can be an RF signal of the B3 frequency band, and the second signal processing unit can be a duplexer. However, it should be clear that the RF system is not only applicable to the above two frequency bands, but also other suitable frequency bands. Exemplarily, one of the first RF signal and the second RF signal is an LTE signal and the other is an NR signal. For example, the first RF signal can be the B7 frequency band, and the first signal processing unit can be a duplexer; the second RF signal can be the n40 frequency band, and the second signal processing unit can be a filter; or, the first RF signal can be the n20 frequency band, and the first signal processing unit can be a duplexer; the second RF signal can be the B8 frequency band, and the second signal processing unit can be a duplexer. Of course, other suitable combinations are also possible, and the embodiments of the present application are not limited to this.

[0201] Figure 4 The functions and coupling relationships of multiple hardware devices in the RF system shown are similar to Figure 2 The hardware devices corresponding to the radio frequency systems shown are basically the same and will not be described in detail here.

[0202] Figure 4 The RF system shown is similar to Figure 2 One of the differences between the RF systems shown is that the power amplifier PA1 includes at least a first amplifying device for processing the high-frequency RF signal required by the n41 frequency band, and the power amplifier PA2 includes at least a second amplifying device for processing the high-frequency RF signal required by the n41 frequency band, and a third amplifying device for processing the intermediate-frequency RF signal required by the B3 frequency band.

[0203] By adding a second amplifying device for processing the high-frequency radio frequency signal required for the n41 frequency band to the power amplifier PA2, a hardware basis for merging the uplink of the n41 frequency band into the power amplifier PA2 can be provided.

[0204] Figure 4 The RF system shown is similar to Figure 2 The second difference between the RF systems shown is: Figure 4 The radio frequency chip shown includes a sixth port MRX, Figure 2 The RF system shown does not include the sixth port MRX. The sixth port MRX can integrate the functions of the second port MRX1 and the fourth port MRX0. It can be understood that the sixth port MRX can adjust the output power of the RF chip to the uplink RF signal Tn41 of the n41 frequency band based on the sampling signal of the n41 frequency band provided by the coupler 1; the sixth port MRX can also adjust the output power of the RF chip to the uplink RF signal TB3 of the B3 frequency band based on the sampling signal of the B3 frequency band provided by the coupler 2.

[0205] Figure 4 The RF system shown is similar to Figure 2 The third difference of the radio frequency system shown is that the radio frequency system further includes a first switching unit.

[0206] In some feasible implementations, the first switching unit may include a jumper board, a single-pole double-throw switch, or other suitable switching device, which is not limited here.

[0207] The first switching unit K1 can be coupled to the power amplifier PA1, the power amplifier PA2 and the filter respectively. The first switching unit switches between a first state and a second state. When the first switching unit is in the first state, the filter is turned on with the first amplifying device of the power amplifier PA1 and the filter is cut off from the second amplifying device of the power amplifier PA2, so that the filter only performs filtering processing on the uplink RF signal Tn41 provided by the power amplifier PA1. When the first switching unit is in the second state, the filter is turned on with the second amplifying device of the power amplifier PA2 and the filter is cut off from the first amplifying device of the power amplifier PA1, so that the filter only performs filtering processing on the uplink RF signal Tn41 provided by the power amplifier PA2.

[0208] Exemplarily, the first switching unit may include a first terminal 1, a second terminal 2, and a third terminal 3. The first terminal is coupled to the first signal processing unit, the second terminal is coupled to the first amplifying device of the power amplifier PA1, and the third terminal is coupled to the second amplifying device of the power amplifier PA2. When the first switching unit is in the first state, the first terminal is conductive with the second terminal and the first terminal is disconnected from the third terminal, so that the filter is conductive with the first amplifying device of the power amplifier PA1 and the filter is disconnected from the second amplifying device of the power amplifier PA2. When the first switching unit is in the second state, the first terminal is conductive with the third terminal and the first terminal is disconnected from the second terminal, so that the filter is conductive with the second amplifying device of the power amplifier PA2 and the filter is disconnected from the first amplifying device of the power amplifier PA1.

[0209] In the case where the radio frequency system includes the first state switch Q1, the first state switch Q1 is coupled to the second terminal and the LNA BANK respectively. When the first state switch Q1 is in an uplink state, the second terminal is isolated from the LNA BANK; when the first state switch Q1 is in a downlink state, the LNA BANK is connected to the second terminal so that the LNA BANK is connected to the filter.

[0210] In the case where the radio frequency system includes the second state switch Q2, the second state switch Q2 is coupled to the third terminal and the LNA BANK respectively. When the second state switch Q2 is in the uplink state, the third terminal is isolated from the LNA BANK; when the second state switch Q2 is in the downlink state, the LNA BANK is connected to the third terminal so that the LNA BANK is connected to the filter.

[0211] like Figure 5 As shown, when the first switching unit K1 is in the first state, the filter is connected to the first amplifying device of the power amplifier PA1.

[0212] The power amplifier PA1 obtains the uplink RF signal Tn41 of the n41 frequency band provided by the first port TX1 in the RF chip. After the first amplifier device in the power amplifier PA1 amplifies the uplink RF signal Tn41, the uplink RF signal Tn41 is provided to the filter when the first state switch is in the uplink state. The filter performs signal processing on the amplified uplink RF signal Tn41 provided by the power amplifier PA1. Thus, the transmission of the uplink RF signal Tn41 at the front end of the RF system is completed.

[0213] The power amplifier PA2 obtains the uplink RF signal TB3 of the B3 frequency band provided by the third port TX0 in the RF chip. The third amplifier device in the power amplifier PA2 amplifies the uplink RF signal TB3 and provides it to the duplexer. The duplexer performs signal processing on the amplified uplink RF signal TB3 provided by the power amplifier PA2. Thus, the transmission of the uplink RF signal TB3 at the front end of the RF system is completed.

[0214] At the same time, since the filter is separated from the second amplifying device of the power amplifier PA2, the filter will not be affected by the amplified uplink RF signal Tn41 provided by the power amplifier PA2, thereby ensuring the reliability of the filter's signal processing of the uplink RF signal Tn41 provided by the power amplifier PA1.

[0215] When the filter obtains the downlink RF signal Rn41 of the n41 frequency band provided by the back-end circuit interface 1, the filter processes the downlink RF signal Rn41 and provides the downlink RF signal Rn41 to the LNA BANK when the first state switch Q1 is in the downlink state. After the LNA BANK amplifies the downlink RF signal Rn41 provided by the filter, it provides the amplified downlink RF signal Rn41 to the fifth port RX of the RF chip. Thus, the transmission of the downlink RF signal Rn41 at the front end of the RF system is completed.

[0216] When the duplexer obtains the downlink RF signal RB3 of the B3 frequency band provided by the back-end circuit interface 2, the duplexer distinguishes the downlink RF signal RB3 from the uplink RF signal TB3, and provides the downlink RF signal RB3 to the LNA BANK. After the LNABANK amplifies the downlink RF signal RB3 provided by the duplexer, it provides the amplified downlink RF signal RB3 to the fifth port RX of the RF chip. Thus, the transmission of the downlink RF signal RB3 at the front end of the RF system is completed.

[0217] The sixth port MRX can adjust the output power of the first port TX1 in the RF chip to the uplink RF signal Tn41 in the n41 frequency band when receiving the sampling signal of the n41 frequency band provided by the coupler 1. The sixth port MRX can also adjust the output power of the third port TX0 in the RF chip to the uplink RF signal TB3 in the B3 frequency band when receiving the sampling signal of the B3 frequency band provided by the coupler 2.

[0218] Figure 5 The uplink and downlink of the n41 frequency band and the uplink and downlink of the B3 frequency band work simultaneously. When the uplink and downlink corresponding to the n41 frequency band work, it is necessary to rely on the LTE network to realize the communication of the NSA network standard. As a subset of the radio frequency system, the uplink and downlink corresponding to the n41 frequency band can support the SA network standard. That is, when the first switching unit K1 is in the first state, the radio frequency system supports both NSA and SA network standards.

[0219] like Figure 6 As shown, when the first switching unit K1 is in the second state, the filter is connected to the second amplifying device of the power amplifier PA2.

[0220] The power amplifier PA2 obtains the uplink RF signal Tn41 of the n41 frequency band provided by the third port TX0 in the RF chip. After the second amplifier device in the power amplifier PA2 amplifies the uplink RF signal Tn41, the uplink RF signal Tn41 is provided to the filter when the second state switch Q2 is in the uplink state. The filter performs signal processing on the amplified uplink RF signal Tn41 provided by the power amplifier PA2. Thus, the transmission of the uplink RF signal Tn41 at the front end of the RF system is completed.

[0221] The power amplifier PA2 obtains the uplink RF signal TB3 of the B3 frequency band provided by the third port TX0 in the RF chip. The third amplifier device in the power amplifier PA2 amplifies the uplink RF signal TB3 and provides it to the duplexer. The duplexer performs signal processing on the amplified uplink RF signal TB3 provided by the power amplifier PA2. Thus, the transmission of the uplink RF signal TB3 at the front end of the RF system is completed.

[0222] At the same time, since the filter is separated from the first amplifying device of the power amplifier PA1, the filter will not be affected by the amplified uplink RF signal Tn41 provided by the power amplifier PA1, thereby ensuring the reliability of the filter's signal processing of the uplink RF signal Tn41 provided by the power amplifier PA2.

[0223] When the filter obtains the downlink RF signal Rn41 of the n41 frequency band provided by the back-end circuit interface 1, the filter processes the downlink RF signal Rn41 and provides the downlink RF signal Rn41 to the LNA BANK when the second state switch Q2 is in the downlink state. After the LNA BANK amplifies the downlink RF signal Rn41 provided by the filter, it provides the amplified downlink RF signal Rn41 to the fifth port RX of the RF chip. Thus, the transmission of the downlink RF signal Rn41 at the front end of the RF system is completed.

[0224] When the duplexer obtains the downlink RF signal RB3 of the B3 frequency band provided by the back-end circuit interface 2, the duplexer distinguishes the downlink RF signal RB3 from the uplink RF signal TB3, and provides the downlink RF signal RB3 to LNABANK. After LNABANK amplifies the downlink RF signal RB3 provided by the duplexer, it provides the amplified downlink RF signal RB3 to the fifth port RX of the RF chip. Thus, the transmission of the downlink RF signal RB3 at the front end of the RF system is completed.

[0225] The sixth port MRX can adjust the output power of the third port TX0 in the RF chip to the uplink RF signal Tn41 in the n41 frequency band when receiving the sampling signal of the n41 frequency band provided by the coupler 1. The sixth port MRX can also adjust the output power of the third port TX0 in the RF chip to the uplink RF signal TB3 in the B3 frequency band when receiving the sampling signal of the B3 frequency band provided by the coupler 2.

[0226] Figure 6 The uplink of the uplink radio frequency signal Tn41 and the uplink of the uplink radio frequency signal TB3 can work in time division. When the uplink and downlink corresponding to the n41 frequency band work, they completely rely on the NR network instead of the LTE network to achieve communication that only supports the SA network standard. That is, when the first switching unit K1 is in the second state, the radio frequency system can only support the SA network standard.

[0227] Combination Figure 5 and Figure 6 It can be seen that under the premise that the RF system meets its respective communication functions in different working modes, Figure 6 The uplink of the uplink radio frequency signal Tn41 and the uplink of the uplink radio frequency signal TB3 are combined in the power amplifier PA2, and Figure 6 The RF system in FIG. 1 does not utilize power amplifier PA1. Figure 5 The RF system shown supports both NSA and SA network standards, and is transformed into Figure 6 The RF system that only supports the SA network standard can at least simplify the power amplifier PA1 in the RF system, reduce the number of hardware devices in the RF system, and reduce the difficulty of hardware layout of the RF system and the cost of the RF system.

[0228] In some feasible implementations, when both RF power supply 1 and RF power supply 2 are RF power supplies that support the HPUE function, since RF power supply 2 supports the HPUE function and can meet the requirements of the n41 frequency band, the RF power supply 1 can be simplified while the power amplifier PA1 in the RF system is simplified. In this way, the RF system can further reduce the number of hardware devices, thereby reducing the difficulty of the RF system hardware layout and the cost of the RF system.

[0229] based on Figure 5 and Figure 6 In the radio frequency system shown in the figure, if the manufacturer wants to transform the radio frequency system supporting both NSA and SA network standards into a radio frequency system supporting only SA network standard, the radio frequency system transformation method can be used to achieve the transformation of the radio frequency system. The radio frequency system transformation method includes the following two steps.

[0230] Step 1: Set the first switching unit K1 to the second state.

[0231] Exemplarily, the first switching unit K1 is switched from the first state to the second state. Also exemplary, the first switching unit K1 is kept in the second state.

[0232] Step 2: Remove the power amplifier PA1, such as Figure 7 shown.

[0233] The order of step 1 and step 2 is not limited. For example, step 1 is performed before step 2, or step 2 is performed before step 1, or step 1 and step 2 are performed simultaneously.

[0234] In which, when the RF power supply 2 is a RF power supply supporting the HPUE function, the RF power supply 1 may be removed, and the RF power supply 2 is retained to power the power amplifier PA2.

[0235] Step 3: Get Figure 8 The modified RF system is shown.

[0236] Through the above-mentioned radio frequency system transformation method, it can be Figure 3 The RF system shown in the figure is modified to Figure 8 The RF system shown. The RF system includes a RF chip, a power amplifier PA2, a filter, a duplexer and a first switching unit K1. The power amplifier PA2 is coupled to the RF chip, and the power amplifier PA2 includes a second amplifying device and a third amplifying device. The second amplifying device is used to amplify the uplink RF signal Tn41, and the third amplifying device is used to amplify the uplink RF signal TB3. The duplexer is coupled to the third amplifying device. The first switching unit is coupled to the filter and the second amplifying device respectively. When the first switching unit is in the first state, the filter is isolated from the second amplifying device; when the first switching unit is in the second state, the filter is connected to the second amplifying device.

[0237] Figure 8 The modified RF system shown in the figure only supports the SA network standard, which can realize the time-sharing processing of the first RF signal and the second RF signal. Figure 3 For the RF system shown in the figure, the amount of hardware is reduced, thereby reducing the difficulty of arranging the RF system on the circuit board and the cost of the RF system.

[0238] In this way, when the electronic device is no longer required to support the NSA network standard, the RF system provided by the embodiment of the present application can obtain a RF system that only supports the SA network standard through the above-mentioned RF system modification method while being compatible with both the NSA network standard and the SA network standard. In the process of modifying the RF system, there is no need to redesign and modify the circuit board equipped with the RF system, which can save the cost required to modify the circuit board, antenna design and the overall structure of the electronic device, and shorten the time required for mass production of the electronic device. At the same time, the power amplifier PA1 can also be recycled to reduce the cost of the RF system.

[0239] Fig. 9 A schematic diagram of the structure of a radio frequency system provided in some embodiments of the present application is shown; Fig.10 for Fig. 9 The signal schematic diagram of the radio frequency system shown in the second switching unit is in the first state; Fig.11 for Fig. 9 The signal schematic diagram of the radio frequency system when the second switching unit is in the second state is shown; Fig.12 For Fig. 9 The structure diagram of the radio frequency system after the radio frequency system is modified is shown.

[0240] Fig. 9 The functions and coupling relationships of the hardware devices in the RF system shown are similar to Figure 4 The hardware devices corresponding to the radio frequency systems shown are basically the same and will not be described in detail here.

[0241] Fig. 9 The RF system shown is similar to Figure 4 One of the differences between the RF systems shown is that: Figure 4 There is no binding relationship between the sixth port and the first port TX1 and the third port TX0; and Fig. 9 The RF chip does not have the sixth port. The RF chip includes the second port MRX1 and the fourth port MRX0. The second port MRX1 is bound to the first port TX1, and the fourth port MRX0 is bound to the third port TX0. The uplink of the n41 frequency band and the uplink of the B3 frequency band are not distinguished. The RF chip can adjust the power of the uplink RF signal Tn41 output by the third port TX0 based on the sampling signal of the n41 frequency band received by the fourth port MRX0. The RF chip can also adjust the power of the uplink RF signal TB3 output by the third port TX0 based on the sampling signal of the B3 frequency band received by the fourth port MRX0.

[0242] Fig. 9 The RF system shown is similar to Figure 4The second difference of the RF system shown is that the RF system may also include a signal combiner. The signal combiner may be coupled to coupler 1, coupler 2, and the fourth port MRX0, respectively. For ease of understanding, the signal combiner is described below using a combiner as an example, but it is not limited to a combiner, and other hardware devices with a signal combining function should also be considered as signal combiners.

[0243] The signal combiner is used for combining the sampling signal of the n41 frequency band provided by the coupler 1 and the sampling signal of the B3 frequency band provided by the coupler 2 and providing the combined signals to the fourth port MRX0.

[0244] Fig. 9 The RF system shown is similar to Figure 4 The third difference of the radio frequency system shown is that the radio frequency system further includes a second switching unit K2.

[0245] In some feasible implementations, the second switching unit K2 may include a jumper board, a single-pole double-throw switch, or other suitable switching device, which is not limited here.

[0246] The second switching unit K2 can be coupled to the coupler 1, the second port MRX1 and the fourth port MRX0 respectively. The second switching unit K2 switches between a first state and a second state. When the second switching unit K2 is in the first state, the coupler 1 is connected to the second port MRX1 and the coupler 1 is disconnected from the fourth port MRX0. When the second switching unit K2 is in the second state, the coupler 1 is connected to the fourth port MRX0 and the coupler 1 is disconnected from the second port MRX1.

[0247] Exemplarily, the second switching unit K2 may include a fourth terminal 4, a fifth terminal 5 and a sixth terminal 6. The fourth terminal is coupled to the coupler 1, the fifth terminal is coupled to the second port MRX1, and the sixth terminal is coupled to the fourth port MRX0. When the second switching unit is in the first state, the fourth terminal is conducted with the fifth terminal and the fourth terminal is disconnected from the sixth terminal, so that the coupler 1 is conducted with the second port MRX1 and the coupler 1 is disconnected from the fourth port MRX0. When the second switching unit is in the second state, the fourth terminal is conducted with the sixth terminal and the fourth terminal is disconnected from the fifth terminal, so that the coupler 1 is conducted with the fourth port MRX0 and the filter is disconnected from the second port MRX1.

[0248] In some feasible implementations, the first switching unit K1 and the second switching unit K2 may be in the same working state. It can be understood that when the first switching unit K1 is in the first state, the second switching unit K2 may be in the first state; when the first switching unit K1 is in the second state, the second switching unit K2 may be in the second state.

[0249] like Fig.10 As shown, when the second switching unit K2 is in the first state, conduction is provided between the coupler 1 and the second port MRX1.

[0250] The coupler 1 is coupled with the filter, and can be coupled to at least part of the amplified uplink RF signal Tn41 to form a sampling signal of the n41 frequency band. In this way, the sampling signal of the n41 frequency band of the coupler 1 is transmitted to the second port MRX1, so that the RF chip can adjust the power and other parameters of the uplink RF signal Tn41 output by the first port TX1 according to the sampling signal of the n41 frequency band. Thus, the transmission of the sampling signal of the n41 frequency band in the RF system is completed.

[0251] The second coupler is coupled to the duplexer, and can be coupled to at least part of the amplified uplink RF signal TB3 to form a sampling signal of the B3 frequency band. In this way, the sampling signal of the B3 frequency band of the second coupler is transmitted to the fourth port MRX0, so that the RF chip can adjust the power and other parameters of the uplink RF signal TB3 output by the third port TX0 according to the sampling signal of the B3 frequency band. Thus, the transmission of the sampling signal of the B3 frequency band in the RF system is completed.

[0252] At the same time, due to the isolation between coupler 1 and the fourth port MRX0, the fourth port MRX0 will not receive the sampling signal of the n41 frequency band provided by coupler 1, thereby ensuring that when the RF chip adjusts the power of the uplink RF signal Tn41 output by the first port TX1 based on the sampling signal of the n41 frequency band of the second port MRX1, it will not be interfered by the sampling signal of the n41 frequency band of the fourth port MRX0, thereby improving the reliability of the RF chip in regulating the signal power of the uplink RF signal Tn41.

[0253] Fig.10 The RF chip adjusts the output power of the uplink RF signal Tn41 output by the first port TX1 based on the sampling signal of the n41 frequency band received by the second port MRX1; the RF chip adjusts the output power of the uplink RF signal TB3 output by the third port TX0 based on the sampling signal of the B3 frequency band received by the fourth port MRX1.

[0254] like Fig.11 As shown, when the second switching unit K2 is in the second state, conduction is provided between the coupler 1 and the fourth port MRX1.

[0255] The coupler 1 is coupled with the filter, and can be coupled to at least part of the amplified uplink RF signal Tn41 to form a sampling signal of the n41 frequency band. In this way, the sampling signal of the n41 frequency band of the coupler 1 is transmitted to the fourth port MRX0, so that the RF chip can adjust the power and other parameters of the uplink RF signal Tn41 output by the third port TX0 according to the sampling signal of the n41 frequency band. Thus, the transmission of the sampling signal of the n41 frequency band in the RF system is completed.

[0256] The coupler 2 is coupled with the duplexer, and can be coupled to at least part of the amplified uplink RF signal TB3 to form a sampling signal of the B3 frequency band. In this way, the sampling signal of the B3 frequency band of the coupler 2 is transmitted to the fourth port MRX0, so that the RF chip can adjust the power and other parameters of the uplink RF signal TB3 outputted from the third port TX0 according to the sampling signal of the B3 frequency band. Thus, the transmission of the sampling signal of the B3 frequency band in the RF system is completed.

[0257] Exemplarily, the sampling signal of the n41 frequency band of coupler 1 is combined by the combiner, and the sampling signal of the B3 frequency band of the second coupler is transmitted to the combiner. The combiner combines the sampling signal of the n41 frequency band and the sampling signal of the B3 frequency band and outputs them to the fourth port MRX1.

[0258] At the same time, due to the isolation between coupler 1 and the second port MRX1, the second port MRX1 will not receive the sampling signal of the n41 frequency band provided by coupler 1, thereby ensuring that when the RF chip adjusts the power of the uplink RF signal Tn41 output by the third port TX0 based on the sampling signal of the n41 frequency band of the fourth port MRX0, it will not be interfered by the sampling signal of the n41 frequency band of the second port MRX1, thereby improving the reliability of the RF chip in regulating the signal power of the uplink RF signal Tn41.

[0259] Fig.11 The RF chip adjusts the output power of the uplink RF signal Tn41 output by the third port TX0 based on the sampling signal of the n41 frequency band received by the fourth port MRX1; the RF chip adjusts the output power of the uplink RF signal TB3 output by the third port TX0 based on the sampling signal of the B3 frequency band received by the fourth port MRX1.

[0260] Combination Fig.10 and Fig.11 It can be seen that when the first switching unit K1 switches from the first state to the second state, the uplink of the uplink RF signal Tn41 and the uplink of the uplink RF signal TB3 both pass through the power amplifier PA2. By coupling the coupler 1 with the fourth port MRX0 through the second switching unit K2, the RF chip can adjust the output power of the uplink RF signal Tn41 output by the third port TX0 based on the sampling signal of the n41 frequency band received by the fourth port MRX0. Thereby, the accuracy of the output power of the n41 frequency band in the RF system is improved.

[0261] based on Fig.10 and Fig.11For the RF system shown in the figure, the manufacturer wants to transform the RF system that supports both NSA and SA network standards into a RF system that only supports SA network standard. Based on the above RF system transformation method, step 4 can also be included before step 3.

[0262] Step 4: Set the second switching unit K2 to the second state.

[0263] Exemplarily, the second switching unit K2 is switched from the first state to the second state. Also exemplary, the second switching unit K2 is kept in the second state.

[0264] The order of step 1, step 2 and step 4 is not limited.

[0265] After step 4, you can Fig. 9 The RF system shown in the figure is modified to Fig.12 The RF system shown. The RF system includes a RF chip, a power amplifier PA2, a filter, a duplexer, a first switching unit K1, a coupler 1, a coupler 2 and a second switching unit K2. The power amplifier PA2 is coupled to the RF chip, and the power amplifier PA2 includes a second amplifying device and a third amplifying device. The second amplifying device is used to amplify the uplink RF signal Tn41, and the third amplifying device is used to amplify the uplink RF signal TB3. The duplexer is coupled to the third amplifying device. The first switching unit is coupled to the filter and the second amplifying device respectively. When the first switching unit is in the first state, the filter is isolated from the second amplifying device; when the first switching unit is in the second state, the filter is connected to the second amplifying device. The coupler 1 is coupled to the filter respectively; the coupler 1 is used to obtain at least part of the uplink RF signal Tn41. The coupler 2 is coupled to the duplexer and the fourth port MRX0 of the RF chip respectively; the coupler 2 is used to obtain at least part of the uplink RF signal TB3 and transmit it to the fourth port MRX0. The second switching unit K2 is coupled to the coupler 1, the second port MRX1 and the fourth port MRX0 respectively. The second switching unit K2 switches between a first state and a second state. When the second switching unit K2 is in the first state, the coupler 1 is connected to the second port MRX1 and the coupler 1 is disconnected from the fourth port MRX0. When the second switching unit K2 is in the second state, the coupler 1 is coupled to the fourth port MRX0 and the coupler 1 is disconnected from the second port MRX1.

[0266] Fig.12 The modified RF system shown in the figure only supports the SA network standard, which can realize the time-sharing processing of the first RF signal and the second RF signal. Fig. 9 For the RF system shown in the figure, the amount of hardware is reduced, thereby reducing the difficulty of arranging the RF system on the circuit board and the cost of the RF system.

[0267] In this way, when the electronic device is no longer required to support the NSA network standard, the RF system provided by the embodiment of the present application can obtain a RF system that only supports the SA network standard through the above-mentioned RF system modification method while being compatible with both the NSA network standard and the SA network standard. In the process of modifying the RF system, there is no need to redesign and modify the circuit board equipped with the RF system, which can save the cost required to modify the circuit board, antenna design and the overall architecture of the electronic device, and shorten the time required for mass production of the electronic device. At the same time, the power amplifier PA1 can also be recycled to reduce the cost of the RF system.

[0268] Fig.13 A schematic diagram of the structure of a radio frequency system provided in some embodiments of the present application is shown; Fig.14 for Fig.13 The signal schematic diagram of the radio frequency system shown is when the third switching unit is in the first state; Fig.15 for Fig.13 A signal schematic diagram of the radio frequency system when the third switching unit is in the second state; Fig.16 For Fig.13 A simplified structural diagram of the radio frequency system shown; Fig.17 For Fig.13 The structure diagram of the radio frequency system after the radio frequency system is modified is shown.

[0269] Fig.13 The functions and coupling relationships of the hardware devices in the RF system shown are similar to Fig. 9 The hardware devices corresponding to the radio frequency systems shown are basically the same and will not be described in detail here.

[0270] Fig.13 The RF system shown is similar to Fig. 9 One of the differences between the RF systems shown is that RF power supply 1 is a RF power supply that supports the HPUE function, and RF power supply 2 is a RF power supply that does not support the HPUE function.

[0271] Fig.13 In the case where the RF system shown supports both NSA and SA network standards, the power amplifier PA1 is used to process RF signals in the n41 frequency band, so the RF power supply 1 that supplies power to the power amplifier PA1 is a RF power supply that supports the HPUE function. The power amplifier PA2 is used to process RF signals in the B3 frequency band, and the RF power supply 2 that supplies power to the power amplifier PA2 does not need to support the HPUE function. Since the price of RF power supplies that support the HPUE function is higher than that of RF power supplies that do not support the HPUE function, in order to save costs, Fig.11 and Fig.12 The RF power supply 2 of the RF system shown is a RF power supply that does not support the HPUE function.

[0272] Fig.13 The RF system shown is similar to Fig. 9 The second difference of the radio frequency system shown is that the radio frequency system further includes a third switching unit K3.

[0273] In some feasible implementations, the third switching unit K3 may include a jumper board, a single-pole double-throw switch, or other suitable switching device, which is not limited here.

[0274] The third switching unit K3 is coupled to the power amplifier PA2, the RF power supply 1, and the RF power supply 2, respectively. The third switching unit K3 switches between a first state and a second state. When the third switching unit K3 is in the first state, the power amplifier PA2 is connected to the RF power supply 1 and the power amplifier PA2 is disconnected from the RF power supply 2. When the third switching unit K3 is in the second state, the power amplifier PA2 is connected to the RF power supply 2 and the power amplifier PA2 is disconnected from the RF power supply 1.

[0275] Exemplarily, the third switching unit K3 includes a seventh terminal 7, an eighth terminal 8, and a ninth terminal 9. The seventh terminal is coupled to the power amplifier PA2, the eighth terminal is coupled to the RF power supply 2, and the ninth terminal is coupled to the RF power supply 1. When the third switching unit K3 is in the first state, the seventh terminal is connected to the eighth terminal and the seventh terminal is disconnected from the ninth terminal, so that the power amplifier PA2 is connected to the RF power supply 2 and the power amplifier PA2 is disconnected from the RF power supply 1. When the third switching unit K3 is in the second state, the seventh terminal is connected to the ninth terminal and the seventh terminal is disconnected from the eighth terminal, so that the power amplifier PA2 is connected to the RF power supply 1 and the power amplifier PA2 is disconnected from the RF power supply 2.

[0276] In some feasible implementations, the first switching unit K1 and the third switching unit K3 may be in the same working state. It can be understood that when the first switching unit K1 is in the first state, the third switching unit K3 may be in the first state; when the first switching unit K1 is in the second state, the third switching unit K3 may be in the second state.

[0277] Exemplarily, when the radio frequency system includes a first switching unit K1, a second switching unit K2, and a third switching unit K3 at the same time, the first switching unit K1, the second switching unit K2, and the third switching unit K3 can be in the first state at the same time; or, the first switching unit K1, the second switching unit K2, and the third switching unit K3 can be in the second state at the same time.

[0278] like Fig.14 As shown, when the third switching unit K3 is in the first state, the power amplifier PA2 is connected to the RF power supply 2.

[0279] When the first switching unit K1 is in the first state, the power amplifier PA1 is used to process the uplink RF signal Tn41 of the n41 frequency band, and the power amplifier PA2 is used to process the uplink RF signal TB3 of the B3 frequency band. At this time, the third switching unit K3 is in the first state, so that the RF power supply 1 with the HPUE function supplies power to the power amplifier PA1 to ensure that the power amplifier PA1 amplifies the uplink RF signal Tn41 normally. The RF power supply 2 without the HPUE function supplies power to the power amplifier PA2, which can also enable the power amplifier PA2 to amplify the uplink RF signal TB3 normally.

[0280] like Fig.15 As shown, when the third switching unit K3 is in the second state, the power amplifier PA2 is connected to the RF power supply 1.

[0281] When the first switching unit K1 is in the second state, the power amplifier PA1 does not work, and the power amplifier PA2 is used to process the uplink RF signal Tn41 of the n41 frequency band and the uplink RF signal TB3 of the B3 frequency band. At this time, the third switching unit K3 is in the second state, so that the RF power supply 1 with HPUE function supplies power to the power amplifier PA2 to ensure that the power amplifier PA2 amplifies the uplink RF signal Tn41 normally, and the power amplifier PA2 can also amplify the uplink RF signal TB3 normally.

[0282] It can be understood that in order to reduce the cost of the RF system, when only the RF power supply 1 is a RF power supply that supports the HPUE function and the RF power supply 2 is a cheap RF power supply that does not support the HPUE function, a third switching unit K3 is added to the RF system. The third switching unit K3 can control the RF power supply 1 to supply power to the power amplifier 1 when the power amplifier PA1 processes the uplink RF signal Tn41; the third switching unit K3 can also control the RF power supply 1 to supply power to the power amplifier 1 when the power amplifier PA1 does not work and the power amplifier PA2 processes the uplink RF signal Tn41.

[0283] In this way, it can be ensured that there is always an RF power supply supporting the HPUE function to amplify the power amplifier in the uplink RF signal Tn41, ensuring the normal operation of the uplink in the n41 frequency band of the RF system and improving the reliability of the RF system.

[0284] It should be noted that the above Figure 13-Figure 15The example in which the RF chip includes the first switching unit K1, the second switching unit K2 and the third switching structure K3 is used for illustration. In fact, the RF chip may only include the first switching unit K1 and the third switching unit K3 but not the second switching unit K2. In addition, it can also ensure that there is always an RF power supply supporting the HPUE function to amplify the power amplifier in the uplink RF signal Tn41, ensure the normal operation of the uplink in the n41 frequency band of the RF system, and improve the reliability of the RF system.

[0285] based on Fig.13 For the RF system shown in the figure, the manufacturer wants to transform the RF system that supports both NSA and SA network standards into a RF system that only supports SA network standard. Based on the above RF system transformation method, steps 5 and 6 can also be included before step 3.

[0286] Step 5: Set the third switching unit K3 to the second state.

[0287] Exemplarily, the third switching unit K3 is switched from the first state to the second state. Also exemplary, the third switching unit K3 is kept in the second state.

[0288] Step 6: Remove the RF power supply 2, such as Fig.16 shown.

[0289] The order of step 5 and step 6 is not limited. For example, step 5 is performed before step 6, or step 6 is performed before step 5, or step 5 and step 6 are performed simultaneously.

[0290] In addition, the order of step 1, step 2, step 4, step 5 and step 6 is not limited.

[0291] Step 3 can specifically be: get Fig.17 The modified RF system is shown.

[0292] Through the above-mentioned radio frequency system transformation method, it can be Fig.13 The RF system shown in the figure is modified to Fig.17The RF system shown. The RF system includes a RF chip, a power amplifier PA2, a filter, a duplexer, a first switching unit K1, a coupler 1, a coupler 2, a second switching unit K2 and a RF power supply 1. The power amplifier PA2 is coupled to the RF chip, and the power amplifier PA2 includes a second amplifying device and a third amplifying device. The second amplifying device is used to amplify the uplink RF signal Tn41, and the third amplifying device is used to amplify the uplink RF signal TB3. The duplexer is coupled to the third amplifying device. The first switching unit is coupled to the filter and the second amplifying device respectively. When the first switching unit is in the first state, the filter is isolated from the second amplifying device; when the first switching unit is in the second state, the filter is connected to the second amplifying device. The coupler 1 is coupled to the filter respectively; the coupler 1 is used to obtain at least part of the uplink RF signal Tn41. The coupler 2 is coupled to the duplexer and the fourth port MRX0 of the RF chip respectively; the coupler 2 is used to obtain at least part of the uplink RF signal TB3 and transmit it to the fourth port MRX0. The second switching unit K2 is coupled to the coupler 1, the second port MRX1 and the fourth port MRX0 respectively. The second switching unit K2 switches between a first state and a second state. When the second switching unit K2 is in the first state, the coupler 1 is connected to the second port MRX1 and the coupler 1 is disconnected from the fourth port MRX0. When the second switching unit K2 is in the second state, the coupler 1 is coupled to the fourth port MRX0 and the coupler 1 is disconnected from the second port MRX1. The third switching unit K3 is coupled to the RF power supply 1 and the power amplifier PA2 respectively. The third switching unit K3 switches between the first state and the second state, and when the third switching unit K3 is in the first state, the RF power supply 1 is disconnected from the power amplifier PA2. When the third switching unit K3 is in the second state, the RF power supply 1 is connected to the power amplifier PA2.

[0293] Fig.17 The modified RF system shown in the figure only supports the SA network standard, which can realize the time-sharing processing of the first RF signal and the second RF signal. Fig.13 For the RF system shown in the figure, the amount of hardware is reduced, thereby reducing the difficulty of arranging the RF system on the circuit board and the cost of the RF system.

[0294] In this way, when the electronic device is no longer required to support the NSA network standard, the RF system provided by the embodiment of the present application can obtain a RF system that only supports the SA network standard through the above-mentioned RF system modification method while being compatible with both the NSA network standard and the SA network standard. In the process of modifying the RF system, there is no need to redesign and modify the circuit board equipped with the RF system, which can save the cost required to modify the circuit board, antenna design, and the overall architecture of the electronic device, and shorten the time required for mass production of the electronic device. At the same time, the RF power supply 2 can also be recycled to reduce the cost of the RF system.

[0295] It should be noted that the above are all based on the transformation of the RF architecture of two uplinks using two power amplifier units respectively into the RF architecture design of two uplinks sharing one power amplifier unit. In fact, it can also be the RF architecture of N (N≥3 integer) uplinks into the RF architecture design of one uplink, such as Fig.18 The principle of the N-way compatible design is basically the same as that of the two-way compatible design, and will not be described in detail here.

[0296] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions within the technical scope disclosed in the present application should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A radio frequency system, characterized in that: include: A radio frequency chip, a first power amplification unit, a first signal processing unit, a second power amplification unit, a second signal processing unit and a first switching unit; The first power amplification unit is coupled to the radio frequency chip; the first power amplification unit includes a first amplification device; The second power amplification unit is coupled to the radio frequency chip, and the second power amplification unit includes a second amplification device and a third amplification device; The second signal processing unit is coupled to the third amplifying device; The first switching unit is coupled to the first signal processing unit, the first amplifying device and the second amplifying device respectively; the first switching unit switches between a first state and a second state, and when the first switching unit is in the first state, the first signal processing unit is connected to the first amplifying device and the first signal processing unit is disconnected from the second amplifying device; when the first switching unit is in the second state, the first signal processing unit is connected to the second amplifying device and disconnected from the first signal processing unit and the first amplifying device.

2. The radio frequency system according to claim 1, characterized in that: The first switching unit includes a first terminal, a second terminal and a third terminal; The first terminal is coupled to the first signal processing unit, the second terminal is coupled to the first amplifying device, and the third terminal is coupled to the second amplifying device; When the first switching unit is in a first state, the first terminal is connected to the second terminal and the first terminal is disconnected from the third terminal; when the second switching unit is in a second state, the first terminal is connected to the third terminal and the first terminal is disconnected from the second terminal.

3. The radio frequency system according to claim 2, characterized in that: The radio frequency system also includes: The low noise amplifying unit is coupled to the first signal processing unit and the second signal processing unit respectively.

4. The radio frequency system according to claim 3, characterized in that: The radio frequency system also includes: A first state switcher is coupled to the second terminal and the low-noise amplifying unit, respectively; the first state switcher switches between an up state and a down state, and when the first state switcher is in the up state, the second terminal is disconnected from the low-noise amplifying unit; when the first state switcher is in the down state, the low-noise amplifying unit is connected to the second terminal; A second state switcher is coupled to the third terminal and the low-noise amplifying unit, respectively; the second state switcher switches between an up state and a down state, and when the second state switcher is in an up state, the third terminal is disconnected from the low-noise amplifying unit; when the second state switcher is in a down state, the low-noise amplifying unit is connected to the third terminal.

5. The radio frequency system according to claim 4, characterized in that: The low noise amplification unit includes a low noise amplification device; The first state switch and the second state switch are respectively coupled to different ports of the same low noise amplifier device.

6. The radio frequency system according to any one of claims 1 to 5, characterized in that: The radio frequency chip includes a first feedback port and a second feedback port; the radio frequency system also includes: A first coupler, coupled to the first signal processing unit; A second coupler, coupled to the second signal processing unit and the second feedback port respectively; a second switching unit, coupled to the first coupler, the first feedback port and the second feedback port respectively; the second switching unit switches between a first state and a second state, when the second switching unit is in the first state, the first coupler is connected to the first feedback port and the first coupler is disconnected from the second feedback port; when the second switching unit is in the second state, the first coupler is connected to the second feedback port and the first coupler is disconnected from the first feedback port.

7. The radio frequency system according to claim 6, characterized in that: The second switching unit includes a fourth terminal, a fifth terminal and a sixth terminal; The fourth terminal is coupled to the first coupler, the fifth terminal is coupled to the first feedback port, and the sixth terminal is coupled to the second feedback port; When the second switching unit is in the first state, the fourth terminal is connected to the fifth terminal and the fourth terminal is disconnected from the sixth terminal; when the second switching unit is in the second state, the fourth terminal is connected to the sixth terminal and the fourth terminal is disconnected from the fifth terminal.

8. The radio frequency system according to claim 6 or 7, characterized in that: The radio frequency system also includes: A signal combiner is coupled to the first coupler, the second coupler and the second feedback port respectively.

9. The radio frequency system according to any one of claims 1 to 8, characterized in that: The radio frequency system also includes: A first radio frequency power supply is coupled to the first power amplification unit; the first radio frequency power supply supports a high power user equipment HPUE function; a second radio frequency power source; a third switching unit, coupled to the second power amplifying unit, the second RF power supply and the first RF power supply, respectively; the third switching unit switches between a first state and a second state, and when the third switching unit is in the first state, the second power amplifying unit is connected to the second RF power supply and the second power amplifying unit is disconnected from the first RF power supply; when the third switching unit is in the second state, the second power amplifying unit is connected to the first RF power supply and the second power amplifying unit is disconnected from the second RF power supply.

10. The radio frequency system according to claim 9, characterized in that: The third switching unit includes a seventh terminal, an eighth terminal and a ninth terminal; The seventh terminal is coupled to the second power amplification unit, the eighth terminal is coupled to the second RF power supply, and the ninth terminal is coupled to the first RF power supply; When the third switching unit is in the first state, the seventh terminal is connected to the eighth terminal and the seventh terminal is disconnected from the ninth terminal; when the third switching unit is in the second state, the seventh terminal is connected to the ninth terminal and the seventh terminal is disconnected from the eighth terminal.

11. The radio frequency system according to any one of claims 1 to 10, characterized in that: The radio frequency system further includes a second switching unit and a third switching unit; At least one of the first switching unit, the second switching unit, and the third switching unit includes a jumper tray.

12. A radio frequency system, characterized in that: include: A radio frequency chip, a second power amplification unit, a first signal processing unit, a second signal processing unit and a first switching unit; The second power amplification unit is coupled to the radio frequency chip, and the second power amplification unit includes a second amplification device and a third amplification device; The second signal processing unit is coupled to the third amplifying device; The first switching unit is coupled to the first signal processing unit and the second amplifying device respectively; the first switching unit switches between a first state and a second state, and when the first switching unit is in the first state, the first signal processing unit is isolated from the second amplifying device; when the first switching unit is in the second state, the first signal processing unit is connected to the second amplifying device.

13. The radio frequency system according to claim 12, characterized in that: The radio frequency chip includes a first feedback port and a second feedback port; the radio frequency system also includes: first couplers, respectively coupled to the first signal processing units; A second coupler, coupled to the second signal processing unit and the second feedback port respectively; a second switching unit, coupled to the first coupler, the first feedback port and the second feedback port respectively; the second switching unit switches between a first state and a second state, when the second switching unit is in the first state, the first coupler is connected to the first feedback port and the first coupler is disconnected from the second feedback port; when the second switching unit is in the second state, the first coupler is coupled to the second feedback port and the first coupler is disconnected from the first feedback port.

14. The radio frequency system according to claim 12 or 13, characterized in that: The radio frequency system also includes: a first radio frequency power source; The third switching unit is coupled to the first RF power supply and the second power amplifying unit respectively; the third switching unit switches between a first state and a second state, and when the third switching unit is in the first state, the first RF power supply is isolated from the second power amplifying unit; when the third switching unit is in the second state, the first RF power supply is connected to the second power amplifying unit.

15. A method for modifying a radio frequency system, characterized in that: The method comprises: Providing a radio frequency system before transformation, wherein the radio frequency system before transformation comprises the radio frequency system according to any one of claims 1 to 11; Setting the first switching unit to a second state; Removing the first power amplification unit; Get the modified RF system.

16. The method according to claim 15, characterized in that The radio frequency system before transformation includes the radio frequency system according to claim 6; Before obtaining the modified radio frequency system, the method further includes: The second switching unit is set to a second state.

17. The method according to claim 15 or 16, characterized in that The radio frequency system before transformation includes the radio frequency system according to claim 9; Before obtaining the modified radio frequency system, the method further includes: Setting the third switching unit to a second state; The second RF power source is removed.

18. An electronic device, characterized in that: include: A circuit board, an antenna, a housing, and a radio frequency system as claimed in any one of claims 1 to 11 or a radio frequency system as claimed in any one of claims 12 to 14; The antenna comprises an antenna spring piece and an antenna radiator which are in contact with each other. The antenna spring piece and the radio frequency system are both located on the circuit board and coupled to each other. The antenna radiator is located on the housing.

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