Radio frequency module and electronic equipment

Abstract

The invention provides a radio frequency module and electronic equipment, and relates to the technical field of radio frequency, the radio frequency module comprises channels corresponding to a plurality of bands, each channel comprises a filter and a low noise amplifier, the channels corresponding to part of the bands can share the filter, and the channels corresponding to part of the bands can also share the low noise amplifier. If a band meeting the following conditions exists in each band: a channel corresponding to the first band (B66) and a channel corresponding to the second band (B3) share a multiplexer, and a working frequency band of a transmitting signal of the third band (B25) and a working frequency band of a receiving signal of the second band are overlapped; if the first band and the third band are different, the low-noise amplifier in the channel corresponding to the second band and the low-noise filter in the channel corresponding to the third band need to be set to be not the same low-noise amplifier in a carrier aggregation scene of the first band and the third band, so that the interference condition is reduced.

Description

Technical Field

[0001] The present application relates to the field of radio frequency technology, and in particular to a radio frequency module and electronic equipment. Background Art

[0002] Radio frequency (RF) technology, a high-frequency electromagnetic wave technology with long-distance transmission capabilities, is widely used in the wireless communications field. With the development of RF technology, RF module-related products are becoming increasingly popular. Currently, RF modules are equipped with multiple low-noise amplifiers (LNAs), and carrier aggregation technology is used to enhance data transmission capabilities.

[0003] However, as the number of low-noise amplifiers increases and the supported carrier aggregation capabilities strengthen, signal leakage becomes more likely. Therefore, multiplexers (used to filter signals in two frequency bands separately) are added to RF modules to reduce the number of channels and thus the impact of signal leakage. The addition of multiplexers also introduces other signal interference issues in carrier aggregation scenarios. Summary of the Invention

[0004] The present application provides a radio frequency module and an electronic device, which can reduce the interference effect when the radio frequency module is working.

[0005] To achieve the above objectives, the first aspect of this application adopts the following technical solutions:

[0006] In a first aspect, the present application provides a radio frequency module having a transmission port, including:

[0007] a first filter, configured to transmit signals of a first frequency band and a second frequency band;

[0008] a second filter for transmitting a signal in a third frequency band;

[0009] a first amplifier, configured to transmit a signal of a first frequency band when connected to the first filter;

[0010] a second amplifier, configured to transmit a signal of a second frequency band when connected to the first filter;

[0011] a third amplifier, configured to transmit a signal of a third frequency band when connected to the second filter;

[0012] When the first filter and the second filter are respectively connected to the transmission port, the first amplifier and the first filter are connected, the second filter and the first filter are connected, and the third amplifier and the second filter are connected.

[0013] In the present application, since the first filter is used to transmit received signals of the first frequency band and the second frequency band, and the second filter is used to transmit received signals of the third frequency band, when the first filter and the second filter are respectively connected to the first antenna, it may be a carrier aggregation scenario of the first frequency band and the third frequency band, it may also be a carrier aggregation scenario of the second frequency band and the third frequency band, and it may also be a carrier aggregation scenario of the first frequency band, the second frequency band, and the third frequency band;

[0014] To avoid mutual interference when signals of different frequency bands share the same amplifier, it is necessary to set the amplifiers connected to the filters of the three frequency bands to be different amplifiers. Of course, the amplifier in the RF module can be a low-noise amplifier.

[0015] As another implementation manner of the first aspect, a transmission frequency band of the third frequency band at least partially overlaps with a reception frequency band of the second frequency band.

[0016] In the present application, since the transmission frequency band of the third frequency band at least partially overlaps with the receiving frequency band of the second frequency band, it will not be a carrier aggregation scenario of the second frequency band and the third frequency band, nor will it be a carrier aggregation scenario of the first frequency band, the second frequency band and the third frequency band; that is, the current scenario is a carrier aggregation scenario of the first frequency band and the third frequency band.

[0017] Theoretically, in the carrier aggregation scenario of the first frequency band and the third frequency band, the first amplifier and the first filter are turned on to transmit the received signal of the first frequency band; the third amplifier and the second filter are turned on to transmit the received signal of the third frequency band; the signals of the first frequency band and the third frequency band can be transmitted to different amplifiers, and the amplifier through which the signal of the second frequency band passes can be the same amplifier as the amplifier corresponding to the signal of the first frequency band, or it can also be the same amplifier as the amplifier corresponding to the signal of the third frequency band.

[0018] However, because the transmit frequency band of the third frequency band at least partially overlaps with the receive frequency band of the second frequency band, when simultaneously transmitting signals in the third frequency band, the second frequency band may also receive the portion of the transmit signal that overlaps with the receive frequency band of the second frequency band. To prevent sharing the same amplifier from impacting normal reception of signals in the third frequency band, the second amplifier for transmitting the receive signals in the second frequency band and the third amplifier for transmitting the receive signals in the third frequency band need to be configured as different low-noise amplifiers to avoid sharing the same amplifier and impacting the receive signals in the third frequency band.

[0019] As another implementation of the first aspect, the second amplifier is further configured to transmit a signal in a third frequency band when connected to the second filter;

[0020] In a case where at least one of the first filter and the second filter and the transmission port are non-conductive, the second filter is connected to the second amplifier.

[0021] In the present application, when the first filter and the second filter are respectively connected to the transmission port, in order to avoid interference, the low-noise amplifier used to transmit the second frequency band signal and the third frequency band signal is not the same low-noise amplifier; accordingly, when it is not in this scenario (at least one of the first filter and the second filter is not connected to the transmission port), the above-mentioned impact may not exist. Therefore, the amplifier for transmitting the second frequency band signal and the amplifier for transmitting the third frequency band signal can be the same amplifier, that is, the second amplifier, which can be connected to the first filter (the second low-noise amplifier has the ability to transmit the second frequency band signal) or to the second filter (the second amplifier also has the ability to transmit the third frequency band signal), but the third low-noise amplifier is no longer connected to the second filter.

[0022] Of course, when the first filter and the second filter are connected to the transmission port respectively, it is also necessary to set the second filter to be disconnected from the second amplifier so that the second amplifier does not transmit the signal of the third frequency band at this time.

[0023] As another implementation of the first aspect, the RF module further includes:

[0024] The first switch unit has a first common end connected to the second filter; the first port of the first switch unit is connected to the second amplifier; and the second port of the first switch unit is connected to the third amplifier.

[0025] As another implementation of the first aspect, when the first filter and the second filter are respectively connected to the transmission port, the first common terminal and the second port are connected and not connected to the first port;

[0026] In a case where at least one of the first filter and the second filter is not conductively connected to the transmission port, the first common terminal is conductively connected to the first port, and is not conductively connected to the second port.

[0027] In the present application, the switching operation between the common end and the two ports of the first switching unit can be used to connect the second filter to the second amplifier (in non-specific scenarios, the filter that transmits the signal of the third frequency band and the filter that transmits the signal of the second frequency band can be connected to the same low-noise amplifier), or to connect the second filter to the third amplifier (in specific scenarios, the filter that transmits the signal of the third frequency band and the filter that transmits the signal of the second frequency band are connected to different amplifiers). The specific scenario can be that the first filter and the second filter are respectively connected to the transmission port, or the scenario in which the signal of the first frequency band and the signal of the third frequency band are received simultaneously, or the carrier aggregation scenario of the signal of the first frequency band and the signal of the third frequency band is realized.

[0028] As another implementation of the first aspect, the third amplifier is further configured to transmit a signal of the second frequency band when connected to the first filter;

[0029] In a case where at least one of the first filter and the second filter and the transmission port are not conductive, the first filter and the third amplifier are conductive.

[0030] As another implementation of the first aspect, the RF module further includes:

[0031] The second switch unit has a second common terminal connected to the first filter; a third port of the second switch unit is connected to the second amplifier; and a fourth port of the second switch unit is connected to the third amplifier.

[0032] As another implementation of the first aspect, when the first filter and the second filter are respectively connected to the transmission port, the second common terminal is connected to the third port and is not connected to the fourth port;

[0033] In a case where at least one of the first filter and the second filter and the transmission port are not conductive, the second common terminal and the fourth port are conductive, and the third port is not conductive.

[0034] In the above example, the amplifier connected to the filter transmitting the signal of the second frequency band is fixed in a specific scenario and in a non-specific scenario, and the amplifier connected to the filter transmitting the signal of the third frequency band is changed: in the specific scenario, the amplifier connected to the filter transmitting the signal of the third frequency band and the amplifier connected to the filter transmitting the signal of the second frequency band are not the same low-noise amplifier; in the non-specific scenario, the amplifier connected to the filter transmitting the signal of the third frequency band and the amplifier connected to the filter transmitting the signal of the second frequency band are the same amplifier.

[0035] In this example, the amplifier connected to the filter transmitting the signal of the third frequency band is fixed in a specific scenario and in a non-specific scenario, and the amplifier connected to the filter transmitting the signal of the second frequency band is changed: in the specific scenario, the amplifier connected to the filter transmitting the signal of the second frequency band and the amplifier connected to the filter transmitting the signal of the third frequency band are not the same low-noise amplifier; in the non-specific scenario, the amplifier connected to the filter transmitting the signal of the second frequency band and the amplifier connected to the filter transmitting the signal of the third frequency band are the same low-noise amplifier.

[0036] As another implementation of the first aspect, when at least one of the first filter and the second filter and the transmission port are not conductive, the second filter is connected to the third amplifier; the first filter is connected to the second amplifier, and the first filter is also connected to the first amplifier.

[0037] In the present application, it can be set that the amplifier connected to the filter transmitting the signal of the second frequency band and the amplifier connected to the filter transmitting the signal of the third frequency band are not the same amplifier regardless of whether it is in a specific scenario.

[0038] As another implementation of the first aspect, the radio frequency module further includes: a fifth port, a sixth port, and a seventh port;

[0039] When receiving the signal of the first frequency band and the signal of the third frequency band at the same time, the first filter and the second filter are respectively connected to the transmission port;

[0040] The first filter receives a signal of the first frequency band, and the signal of the first frequency band is transmitted to the fifth port through the first amplifier;

[0041] The first filter receives a signal of the second frequency band, and the signal of the second frequency band is transmitted to the sixth port through the second amplifier;

[0042] The second filter receives the signal of the third frequency band, and the signal of the third frequency band is transmitted to the seventh port through the third amplifier.

[0043] As another implementation of the first aspect, the first filter is a multiplexer;

[0044] The input port of the multiplexer is used to conduct with the transmission port;

[0045] The first output port of the multiplexer is connected to the first amplifier;

[0046] The second output port of the multiplexer is used to be connected to the second amplifier when the duplexer and the second filter are respectively connected to the transmission port.

[0047] A second aspect of the present application provides a radio frequency module having a transmission port, including:

[0048] a first filter connected to the first amplifier and also connected to the second amplifier;

[0049] a second filter connected to the second amplifier;

[0050] a first load unit, wherein a first end of the first load unit is connected between the first filter and the second amplifier, and a second end of the first load unit is grounded;

[0051] When the first filter and the second filter are respectively connected to the transmission port, the first load unit is used to transmit the received signal to the ground.

[0052] In the present application, since the first filter is used to transmit received signals of the first frequency band and the second frequency band, and the second filter is used to transmit received signals of the third frequency band, when the first filter and the second filter are respectively connected to the first antenna, it may be a carrier aggregation scenario of the first frequency band and the third frequency band, it may also be a carrier aggregation scenario of the second frequency band and the third frequency band, and it may also be a carrier aggregation scenario of the first frequency band, the second frequency band, and the third frequency band;

[0053] The present application sets up a second amplifier that is connected to the first filter and the second filter at the same time. Therefore, in order to avoid signal interference problems when sharing an amplifier, it will not be a carrier aggregation scenario of the second frequency band and the third frequency band, nor will it be a carrier aggregation scenario of the first frequency band, the second frequency band and the third frequency band.

[0054] However, even in the scenario of carrier aggregation of the first frequency band and the third frequency band, it is inevitable that there will be receiving signals of the second frequency band in the surrounding environment. When the first filter and the second filter are respectively connected to the transmission port, the path corresponding to the signal of the second frequency band is also in the on state. Therefore, when the power of the signal of the second frequency band in the surrounding environment is high, it will still affect the transmission of the normal signal of the third frequency band. Therefore, the signal of the second frequency band transmitted through the first filter is transmitted to the ground through a grounded load before entering the second low-noise amplifier to avoid affecting the transmission of the signal of the third frequency band.

[0055] As another implementation of the second aspect, when the first filter and the second filter are respectively connected to the transmission port, the first load unit is connected to the first filter;

[0056] In a case where at least one of the first filter and the second filter is not conductively connected to the transmission port, the first load unit is not conductively connected to the first filter.

[0057] In the present application, a third switching unit is set up to achieve the following: in a specific scenario, the received signal of the second frequency band transmitted by the first filter is transmitted to the ground through the load, so as to avoid affecting the transmission of the signal of the third frequency band; in non-specific scenarios, the received signal of the second frequency band transmitted by the first filter is transmitted to the RF chip through the second low-noise amplifier, so as to avoid affecting the transmission of the received signal of the second frequency band.

[0058] As another implementation of the second aspect, an impedance from the first end of the first load unit toward the first load unit is smaller than an impedance from the first end of the first load unit toward the second amplifier.

[0059] In the present application, by setting the impedance in the direction of the first load unit to be smaller than the impedance in the direction of the second amplifier, when an interference signal occurs, it can be transmitted from the load to the ground instead of being transmitted through the amplifier, thereby reducing interference.

[0060] As another implementation of the second aspect, the radio frequency module further includes:

[0061] The third switch unit is connected between the first filter and the second amplifier, and the first load unit is arranged in the third switch unit.

[0062] As another implementation of the second aspect, the third switch unit includes: an eighth port, a ninth port, a tenth port, and a fourth switch;

[0063] The eighth port is connected to the first filter, the ninth port is connected to the second filter, and the tenth port is connected to the second amplifier; the first end of the first load unit is connected to the eighth port through a fourth switch;

[0064] When the first filter and the second filter are respectively connected to the transmission port, the fourth switch is turned on;

[0065] In a case where at least one of the first filter and the second filter and the transmission port are not conductive, the fourth switch is non-conductive.

[0066] As another implementation of the second aspect, the third switch unit includes: an eighth port, a ninth port, a tenth port, and a fifth switch;

[0067] The eighth port is connected to the first filter, the ninth port is connected to the second filter, and the tenth port is connected to the second amplifier; the common end of the fifth switch is connected to the eight ports; the first end of the fifth switch is conductively connected to the tenth port; and the second end of the fifth switch is connected to the first end of the first load unit;

[0068] When the first filter and the second filter are respectively connected to the transmission port, the common end of the fifth switch and the second end of the fifth switch are connected;

[0069] In a case where at least one of the first filter and the second filter and the transmission port are not conductive, the common end of the fifth switch and the first end of the fifth switch are conductive.

[0070] In the present application, a fifth switch with a single-pole double-throw function is used to disconnect the path between the first filter and the second amplifier (cut off the transmission of the second frequency band signal to the second amplifier) ​​and connect the path between the first filter and the circuit (transmit the second frequency band signal to the ground) in a specific scenario; and connect the path between the first filter and the second amplifier (transmit the second frequency band signal to the second amplifier) ​​and disconnect the path between the first filter and the circuit (prevent the second frequency band signal from being transmitted to the ground) in a non-specific scenario.

[0071] As another implementation of the second aspect, when the first filter and the second filter are respectively connected to the transmission port:

[0072] The first filter receives a signal of the first frequency band, and the signal of the first frequency band is transmitted to the fifth port through the first amplifier;

[0073] The first filter receives a signal of a second frequency band, and the signal of the second frequency band is transmitted to the ground through the first load unit;

[0074] The second filter receives a signal of a third frequency band, and the signal of the third frequency band is transmitted to the seventh port through the second amplifier. The transmission frequency band of the third frequency band at least partially overlaps with the reception frequency band of the second frequency band.

[0075] In a third aspect, an electronic device is provided, comprising the RF module of any one of the first aspect or the RF module of any one of the second aspect of the present application, a first antenna connected to the transmission port of the RF module; and a RF chip connected to the output port of the RF module.

[0076] As another implementation of the second aspect, when simultaneously receiving a signal in the first frequency band and a signal in the third frequency band:

[0077] The first antenna receives signals of the first frequency band, the second frequency band, and the third frequency band;

[0078] The signals of the first frequency band and the signals of the third frequency band are transmitted to the RF chip through the RF module;

[0079] The signal of the second frequency band is transmitted to the RF chip through the RF module in the electronic device, or is transmitted to the ground through the RF module.

[0080] As another implementation of the second aspect, the method further includes:

[0081] The second antenna is used to transmit signals.

[0082] In a case where a signal of a first frequency band and a signal of a third frequency band are received through a first antenna, and the first signal of the third frequency band is transmitted through a second antenna:

[0083] The first antenna receives the second signal, and the second signal is transmitted to the ground through the first filter in the RF module, or the second signal is transmitted to the RF chip through the first filter and second amplifier in the RF module. The second signal is a signal within the receiving frequency band of the second frequency band in the first signal.

[0084] It can be understood that the beneficial effects of the third aspect can be found in the relevant descriptions of the first or second aspect, and will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0085] Figure 1 A schematic diagram of the hardware structure of an electronic device using a radio frequency module provided in an embodiment of the present application;

[0086] Figure 2 A schematic diagram of the circuit structure of a radio frequency module provided in an embodiment of the present application;

[0087] Figure 3 A schematic diagram of the circuit structure of another radio frequency module provided in an embodiment of the present application;

[0088] Figure 4 This is the reason why the interference signal of the B25 transmission signal is generated in the 2CA (B66+B25) scenario provided in the embodiment of the present application.

[0089] Figure 5 A schematic diagram of the circuit structure of another radio frequency module provided in an embodiment of the present application;

[0090] Figure 6 A schematic diagram of the circuit structure of another radio frequency module provided in an embodiment of the present application;

[0091] Figure 7 for Figure 6 Schematic diagram of the circuit structure of the LNA-related part of the RF module shown;

[0092] Figure 8 A schematic diagram of the circuit structure of another radio frequency module provided in an embodiment of the present application;

[0093] Figure 9 for Figure 8 Schematic diagram of the circuit structure of the LNA-related part of the RF module shown;

[0094] Figure 10 A schematic diagram of the circuit structure of another radio frequency module provided in an embodiment of the present application;

[0095] Figure 11 for Figure 10 The circuit structure diagram of the LNA SW related part of the RF module shown in the figure;

[0096] Figure 12for Figure 10 The figure shows a schematic diagram of the circuit structure of the LNA SW-related parts in the RF module. DETAILED DESCRIPTION

[0097] In the following description, specific details such as specific system structures and technologies are provided for illustration rather than limitation to facilitate a thorough understanding of the embodiments of the present application. However, it should be clear to those skilled in the art that the present application may also be implemented in other embodiments without these specific details.

[0098] It should be understood that when used in the present specification and the appended claims, the term "comprising" indicates the presence of described features, integers, steps, operations, elements and / or components, but does not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or collections thereof.

[0099] It should also be understood that in the embodiments of this application, "one or more" refers to one, two, or more than two; "and / or" describes the relationship between associated objects, indicating that three relationships can exist; for example, A and / or B can mean: A exists alone, A and B exist simultaneously, and B exists alone, where A and B can be singular or plural. The character " / " generally indicates that the associated objects are in an "or" relationship.

[0100] In addition, in the description of this application specification and the appended claims, the terms "first", "second", "third", "fourth", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0101] References to "one embodiment" or "some embodiments" in this specification mean that a particular feature, structure, or characteristic described in conjunction with that embodiment is included in one or more embodiments of the present application. Thus, phrases such as "in one embodiment," "in some embodiments," "in other embodiments," and "in other embodiments" appearing in various places in this specification do not necessarily refer to the same embodiment, but rather mean "one or more but not all embodiments," unless otherwise specifically emphasized. The terms "including," "comprising," "having," and variations thereof all mean "including but not limited to," unless otherwise specifically emphasized.

[0102] The embodiments of the present application provide an electronic device, which may be a tablet computer, a mobile phone, a wearable device, a laptop computer, an ultra-mobile personal computer (UMPC), a netbook, a personal digital assistant (PDA), etc. The embodiments of the present application do not limit the specific type of the electronic device.

[0103] Figure 1 The electronic device 100 may include a processor 110, an external memory interface 120, an internal memory 121, a universal serial bus (USB) interface 130, a charging management module 140, a power management module 141, a battery 142, an antenna 1, an antenna 2, a mobile communication module 150, a wireless communication module 160, an audio module 170, a speaker 170A, a receiver 170B, a microphone 170C, an earphone interface 170D, a sensor module 180, a button 190, a motor 191, an indicator 192, a camera 193, a display 194, and a subscriber identification module (SIM) card interface 195. The sensor module 180 may include a pressure sensor 180A, a gyroscope sensor 180B, an air pressure sensor 180C, a magnetic sensor 180D, an acceleration sensor 180E, a distance sensor 180F, a proximity light sensor 180G, a fingerprint sensor 180H, a temperature sensor 180J, a touch sensor 180K, an ambient light sensor 180L, a bone conduction sensor 180M, etc.

[0104] It should be understood that the structures illustrated in the embodiments of the present application do not constitute a specific limitation on the electronic device 100. In other embodiments of the present application, the electronic device 100 may include more or fewer components than shown, or may combine or separate certain components, or arrange the components differently. The illustrated components may be implemented in hardware, software, or a combination of software and hardware.

[0105] The processor 110 may include one or more processing units. For example, the processor 110 may include an application processor (AP), a modem processor, a graphics processing unit (GPU), an image signal processor (ISP), a controller, a memory, a video codec, a digital signal processor (DSP), a baseband processor, and / or a neural-network processing unit (NPU). The different processing units may be independent devices or integrated into one or more processors.

[0106] Processor 110 may also include a memory for storing instructions and data. In some embodiments, the memory in processor 110 is a cache memory. This memory can store instructions or data that have just been used or are being recycled by processor 110. If processor 110 needs to use the same instruction or data again, it can directly retrieve it from the memory. This avoids duplicate accesses, reduces processor 110 latency, and thus improves system efficiency.

[0107] The internal memory 121 can be used to store computer executable program codes, and the executable program codes include instructions. The processor 110 executes various functional applications and data processing of the electronic device 100 by running the instructions stored in the internal memory 121. The internal memory 121 may include a program storage area and a data storage area. Among them, the program storage area can store an operating system and an application required for at least one function (such as an image playback function, etc.). The touch sensor 180K is also called a "touch panel". The touch sensor 180K can be set on the display screen 194, and the touch sensor 180K and the display screen 194 form a touch screen, also called a "touch screen". The touch sensor 180K is used to detect touch operations acting on or near it. The touch sensor can pass the detected touch operation to the application processor to determine the type of touch event. Visual output related to the touch operation can be provided through the display screen 194. In other embodiments, the touch sensor 180K can also be set on the surface of the electronic device 100, which is different from the position of the display screen 194.

[0108] The wireless communication function of the electronic device 100 can be implemented through the antenna 1, the antenna 2, the mobile communication module 150, the wireless communication module 160, the modem processor and the baseband processor.

[0109] Antenna 1 and Antenna 2 are used to transmit and receive electromagnetic wave signals. Each antenna in electronic device 100 can be used to cover a single or multiple communication frequency bands. Different antennas can also be reused to improve antenna utilization. For example, antenna 1 can be reused as a diversity antenna for a wireless local area network. In other embodiments, the antennas can be used in conjunction with a tuning switch.

[0110] The mobile communication module 150 can provide wireless communication solutions, including 2G / 3G / 4G / 5G, for the electronic device 100. The mobile communication module 150 may include at least one filter, a switch, a power amplifier, a low-noise amplifier (LNA), and the like. The mobile communication module 150 can receive electromagnetic waves from the antenna 1, filter and amplify the received electromagnetic waves, and transmit them to the modem processor for demodulation. The mobile communication module 150 can also amplify the signals modulated by the modem processor and convert them into electromagnetic waves for radiation via the antenna 1.

[0111] In some embodiments, at least some functional modules of the mobile communication module 150 may be provided in the processor 110. In some embodiments, at least some functional modules of the mobile communication module 150 may be provided in the same device as at least some functional modules of the processor 110.

[0112] The modem processor may include a modulator and a demodulator. The modulator is used to modulate the low-frequency baseband signal to be transmitted into a medium-high frequency signal. The demodulator is used to demodulate the received electromagnetic wave signal into a low-frequency baseband signal. The demodulator then transmits the demodulated low-frequency baseband signal to the baseband processor for processing. After being processed by the baseband processor, the low-frequency baseband signal is passed to the application processor. The application processor outputs a sound signal through an audio device (not limited to the speaker 170A, the receiver 170B, etc.) or displays an image or video through the display screen 194. In some embodiments, the modem processor may be an independent device. In other embodiments, the modem processor may be independent of the processor 110 and be set in the same device as the mobile communication module 150 or other functional modules.

[0113] The wireless communication module 160 can provide wireless communication solutions including wireless local area networks (WLAN) (such as wireless fidelity (Wi-Fi) networks), Bluetooth (BT), global navigation satellite system (GNSS), frequency modulation (FM), near field communication (NFC), infrared (IR), etc., which are applied to the electronic device 100. The wireless communication module 160 can be one or more devices integrating at least one communication processing module. The wireless communication module 160 receives electromagnetic waves via the antenna 2, frequency modulates and filters the electromagnetic wave signals, and sends the processed signals to the processor 110. The wireless communication module 160 can also receive the signal to be sent from the processor 110, frequency modulate it, amplify it, and convert it into electromagnetic waves for radiation through the antenna 2.

[0114] In some embodiments, antenna 1 of electronic device 100 is coupled to mobile communication module 150, and antenna 2 is coupled to wireless communication module 160, so that electronic device 100 can communicate with a network and other devices via wireless communication technology. Wireless communication technology may include global system for mobile communications (GSM), general packet radio service (GPRS), code division multiple access (CDMA), wideband code division multiple access (WCDMA), time-division code division multiple access (TD-SCDMA), long term evolution (LTE), BT, GNSS, WLAN, NFC, FM, and / or IR technology. GNSS may include the global positioning system (GPS), the global navigation satellite system (GLONASS), the Beidou navigation satellite system (BDS), the quasi-zenith satellite system (QZSS) and / or the satellite based augmentation system (SBAS).

[0115] The radio frequency module in the embodiment of the present application may be Figure 1 A portion of the mobile communication module 150 or a portion of the wireless communication module 160 in the illustrated embodiment.

[0116] Frequency bands in mobile communications are generally symmetrical and divided into uplink (UL) and downlink (DL). Uplink refers to information from a terminal to a base station, where the terminal's transmit frequency corresponds to the base station's receive frequency. Downlink refers to information from a base station to a terminal, where the base station's transmit frequency corresponds to the terminal's receive frequency.

[0117] Carrier aggregation (CA) is a technology that combines wireless channel resources within or between frequency bands to increase user data rates and reduce latency. In actual circuits, signals from different frequency bands are received by an antenna and then fed into corresponding low-noise amplifiers (LNAs). After passing through the LNAs, the signals are fed through a multiplexer switch (MUX SW) into the RF chip for frequency mixing and ADC sampling.

[0118] As an example of a CA combination, 4CA (B1, B3, B7, and B40) indicates that a communication device can simultaneously receive or transmit signals in the four frequency bands B1, B3, B7, and B40. This expands the receive or transmit bandwidth, improving the transmission rate. B1 represents band 1, which operates between 2110MHz and 2170MHz for receive signals and 1920MHz and 1980MHz for transmit signals. The transmit and receive frequency bands for the remaining bands are not listed here.

[0119] With the development of mobile communications, terminals can support more downlink carrier aggregation (DLCA) combinations. The following describes in detail the RF receiving module that supports up to 4CA.

[0120] Reference Figure 2 Taking the RF receiving module on a terminal as an example, the receiving module includes: an antenna switch (ASW) connected to the antenna, a filter, a low-noise amplifier switch, a low-noise amplifier, and a multiplexer switch connected to the RF chip.

[0121] The common terminal of ASW is ANT. When the common terminal is connected to any of S0 to S8, the filter of the corresponding operating frequency band can be selected. Of course, in actual applications, the common terminal can be connected to multiple S0 to S8 at the same time.

[0122] Filters include single-band filters and multiplexers. For example, B1 / B3 are multiplexers (single-input, multiple-output), while the others are single-band filters (single-input, single-output).

[0123] The LNA is used to amplify the RF signal. The LNA SW, located in front of the LNA, typically selects the LNA input port. The number of LNAs is related to the maximum number of DLCAs supported by the RF module. For example, if the RF module supports up to 4CA, each operating frequency band in the CA scenario requires an independent LNA path. Therefore, the module requires at least four independently operating LNAs.

[0124] MUX SW, after filtering and amplification, still requires subsequent RF chips for mixing, and the signal path can be flexibly switched through switches.

[0125] In specific implementation, if it is necessary to receive a signal in the B3 working frequency band, it is necessary to turn on the path B corresponding to B3.

[0126] Reference Figure 2 In path B, the common terminal ANT of the antenna switch is connected to S1. The signal received from the antenna passes through the common terminal of the antenna switch, then through the S1 terminal of the antenna switch, and enters the filter corresponding to B3. After filtering by the filter, the signal within the working frequency band of the received signal of B3 is left. This signal continues to pass through LNA3 for low-noise amplification. After low-noise amplification, it is sent to the RF chip for subsequent processing through the multiplexer switch. The paths corresponding to other bands can be referred to the diagram, and no longer given examples one by one.

[0127] Figure 2 The RF module shown can support 4CA. Taking 4CA (B1, B3, B7 and B40) as an example, S0, S1, S5 and S6 in ASW must be connected to the common end.

[0128] Path A corresponding to B1 starts from the common terminal of the antenna switch, passes through the filters of the S0 and B1 frequency bands, LNA1, and finally passes through the multiplexer switch to the RF chip. The filter of the B frequency band is used to filter out the signals with frequencies outside the operating frequency band of the received signal corresponding to band1, while retaining the signals within the operating frequency band of the received signal corresponding to band1.

[0129] Path B corresponding to B3 includes: starting from the common end of the antenna switch, passing through S1, the filter of the B3 frequency band, LNA 3, and finally passing through the multiplexer switch to the RF chip;

[0130] Path C corresponding to B7 includes: starting from the common end of the antenna switch, passing through S5, the filter corresponding to the B7 frequency band, LNA 4, and finally passing through the multiplexer switch to the RF chip;

[0131] Path D corresponding to B40 includes: starting from the common end of the antenna switch, passing through S6, the filter corresponding to the B40 frequency band, LNA2, and finally passing through the multiplexer switch to the RF chip;

[0132] Figure 2 Only the paths corresponding to the bands related to the current CA scenario are shown. The connection relationship between the filters and the switches of the low-noise amplifiers in the paths corresponding to other bands not shown can be determined by the band marks on the pins of the filters of different bands and the low-noise amplifier switches marked in the figure.

[0133] It can be understood that after S0, S1, S5 and S6 are closed simultaneously, there are four paths. The more paths there are, the greater the mutual influence between the multiple paths.

[0134] Reference Figure 2 As shown, since all signals pass through the common terminal of the antenna switch, the signal of path D corresponding to B40 will partially leak into path A corresponding to B1, and partially leak into path B corresponding to B3 and path C corresponding to B7, resulting in deteriorated signal performance of path D corresponding to B40. Of course, this will also cause interference signals in the B40 reception band to be mixed into paths A, B, and C, resulting in interference signals in the B40 reception band existing in paths A, B, and C.

[0135] Similarly, the signal of path C corresponding to B7 will partially leak into path A corresponding to B1, and partially leak into path B corresponding to B3 and path D corresponding to B40, resulting in deterioration in the performance of the signal of path C corresponding to B7. It will also cause path A corresponding to B1, path B corresponding to B3, and path D corresponding to B40 to mix into the interference signal of the B7 receiving frequency band. The interference signal of the B7 receiving frequency band is no longer represented in the diagram.

[0136] Of course, the signal of path A corresponding to B1 will also partially leak into other paths, and the signal of path B corresponding to B3 will also partially leak into other paths, so we will not give examples one by one.

[0137] To address the signal leakage issue of the B40 path, on the one hand, the impedance of the corresponding paths of B1, B3, and B7 can be adjusted so that the corresponding paths of B1, B3, and B7 present high impedance in the B40 receiving signal frequency band, thereby reducing the signal leakage of the B40 path.

[0138] On the other hand, the fewer paths that are simultaneously conductive, the fewer paths for signal leakage. Therefore, a multiplexer can be introduced. Theoretically, the introduced multiplexer is still a filter, but it combines the original single-input and single-output filters into a single-input, multiple-output filter.

[0139] As an example, introducing a one-input, two-output multiplexer (B1 / B3) reduces the original four channels to three, thus reducing the impact of signal leakage. In practical applications, a one-input, three-output multiplexer (B1 / B3 / B7) can also be introduced to reduce the original four channels to two, or two one-input, two-output multiplexers, namely the multiplexer (B1 / B3) and the multiplexer (B7 / B40), can be introduced to reduce the original four channels to two. Other examples of introducing multiplexers to reduce the number of channels in 4CA scenarios are not described here.

[0140] Taking a one-input, two-output multiplexer (B1 / B3) as an example, the input port of the multiplexer is connected to the antenna switch. On the one hand, the multiplexer is used to filter out signals outside the B1 receive frequency band and output the signals in the B1 receive frequency band retained after filtering through one output port. On the other hand, it is also used to filter out signals outside the B3 receive frequency band and output the signals in the B3 receive frequency band retained after filtering through another output port.

[0141] Reference Figure 3 , is a schematic diagram of the circuit structure of a receiving module after introducing a multiplexer (B1 / B3) according to an embodiment of the present application. The paths corresponding to B1, B3, B7, and B40 in the RF module are no longer shown in the figure.

[0142] Introducing a multiplexer can introduce other issues. For example, in 2CA (B25 and B66), the common terminal of the antenna switch (ASW) must be connected to both S1 and S2.

[0143] The B66 receive signal (2110MHz-2200MHz) takes path E from the common end of the antenna switch, passes through S1, the filter corresponding to the B1 / 66 frequency band, LNA1, and finally passes through the multiplexer switch to the RF chip. The filter corresponding to the B1 / 66 frequency band is used to filter out signals outside the 2110MHz-2200MHz range and retain signals within the 2110MHz-2200MHz range.

[0144] The path F of the B25 receive signal (1930MHz-1995MHz) is as follows: starting from the common end of the antenna switch, passing through S2, the filter corresponding to the B25 frequency band, LNA3, and finally passing through the multiplexer switch to the RF chip;

[0145] Since the path corresponding to B66 and the path corresponding to B3 share a multiplexer, when S1 in the path corresponding to B66 is closed, another path exists in the RF module: the path G corresponding to B3 is also turned on.

[0146] The path G of the B3 receive signal (1805MHz-1880MHz) is as follows: starting from the common end of the antenna switch, passing through S1, the filter corresponding to the B3 frequency band, LNA3, and finally passing through the multiplexer switch to the RF chip;

[0147] In actual applications, when the same amplifier receives signals from two frequency bands at the same time, if the energy of the received signal in one frequency band is higher or much higher than the energy of the received signal in the other frequency band, the received signal in the frequency band with lower energy will be suppressed and cannot be transmitted to the RF chip through the amplifier.

[0148] like Figure 3 As shown, in the 2CA (B25 and B66) scenario, the common end of the antenna switch ASW is connected to S1 and S2 at the same time, which is equivalent to simultaneously turning on path E, path F, and path G; however, the low-noise amplifiers in path F (transmitting the signal of the receiving frequency band of B25) and path G (transmitting the signal of the receiving frequency band of B3) are the same low-noise amplifier. Therefore, it may happen that when the RF module receives the signal of the receiving frequency band of B25 and the signal of the receiving frequency band of B66, if there is a signal of the receiving frequency band of B3 in the surrounding environment and the energy of the signal of the receiving frequency band of B3 is relatively high, the signal of the receiving frequency band of B3 may be received by the antenna of the mobile phone and then transmitted to the RF module. When transmitted to LNA3, it will affect the transmission of the signal of the receiving frequency band of B25 in path F.

[0149] In practical applications, electronic equipment includes not only RF receiving modules but also RF transmitting modules.

[0150] To better understand the receiving and transmitting frequency bands of each band, the following lists the receiving and transmitting frequency bands corresponding to B3, B25, and B66 respectively.

[0151] Table 1: B3, B25, and B66 receiving and transmitting frequency bands supported by the RF receiving module

[0152] Band Receiving frequency band Transmitting frequency band B3 1805MHz-1880MHz 1710MHz-1785MHz B25 1930MHz-1995MHz 1850MHz-1915MHz B66 2110MHz-2200MHz 1710MHz-1780MHz

[0153] As an example, when the electronic device receives a signal in the B25 reception frequency band and a signal in the B66 reception frequency band, it may also receive a signal in the B25 reception frequency band and receive a signal in the B66 reception frequency band through another antenna ( Figure 3 Antenna 1) transmits signals in the B25 transmission frequency band and signals in the B66 transmission frequency band.

[0154] Reference Figure 4 , is a schematic diagram of an antenna layout of an electronic device provided in an embodiment of the present application. In this diagram, the positions of the two antennas are for illustration only and do not limit the positions of antennas in an electronic device.

[0155] The electronic device in this example can be a mobile phone. At a certain moment in the 2CA (B25+B66) scenario, the electronic device receives signals in the B25 receive frequency band and the B66 receive frequency band in space through antenna 2. If there is a signal in the B3 receive frequency band in space, the electronic device can also receive the signal in the B3 receive frequency band. At the same time, the electronic device transmits signals in the B25 transmit frequency band through antenna 1. Because the electronic device transmits the B25 transmit frequency band signal through antenna 1 to the surrounding space, antenna 2 will still receive the B25 transmit frequency band signal sent by antenna 1.

[0156] Of course, if the electronic device transmits a signal in the B66 transmission frequency band through antenna 1, since the signal transmitted by the electronic device in the B66 transmission frequency band through antenna 1 is sent to the surrounding space, antenna 2 will still receive the signal in the B66 transmission frequency band sent by antenna 1.

[0157] Reference Figure 3 As shown, in the 2CA (B25+B66) scenario, path E, path F, and path G are all in the on state.

[0158] If an electronic device transmits a signal in the B25 transmission band via antenna 1, the signal may be received by antenna 2. After being received by antenna 2, the signal in the B25 transmission band may pass through paths E, F, and G. When an electronic device transmits a signal via antenna 1, it must pass through a power amplifier (PA) and a filter.

[0159] After the signal in the B25 transmit band is received by antenna 2, it is transmitted along path E: After being received by antenna 2, the signal in the B25 transmit band (1850MHz-1915MHz) passes through the common terminal of the antenna switch, and then through the filters in the SI and B66 receive bands. Since the B66 receive band is 2110MHz-2200MHz, the filter in the B66 receive band filters out signals outside the 2110MHz-2200MHz range. The B25 transmit band signal is 1850MHz-1915MHz. Therefore, the filter in path E can filter out most of the B25 transmit band signal. Even if some B25 transmit band signal remains in path E, it is not sufficient to interfere with the normal reception of the corresponding path of B25.

[0160] After the signal in the B25 transmit band is received by antenna 2, it is transmitted along path F: After being received by antenna 2, the signal in the B25 transmit band (1850MHz-1915MHz) passes from the common terminal of the antenna switch through S2 and the filter in the B25 receive band. Since the B25 receive band is 1930MHz-1995MHz, the filter in the B25 receive band removes signals outside the 1930MHz-1995MHz range. The B25 transmit band's signals are 1850MHz-1915MHz. Therefore, the filter in path F removes most of the B25 transmit band signal. Even if some B25 transmit band signal remains in path F, it is insufficient to interfere with the normal reception of the corresponding path in B25.

[0161] After the signal in the B25 transmit frequency band is received by antenna 2, it is transmitted along path G: The signal in the B25 transmit frequency band (1850MHz-1915MHz) is received by antenna 2 and then passes through the common end of the antenna switch, passing through the filters of the SI and B3 receive frequency bands. Since the B3 receive frequency band is 1805MHz-1880MHz, the filters of the B3 receive frequency band have no effect on filtering out the signals in the 1850MHz-1880MHz band within the B25 transmit frequency band. Therefore, this portion of the signal (typically, the two antennas on the same electronic device are close together, so this portion of the signal energy is higher) passes through LNA3 and is transmitted to the RF chip. In other words, path G transmits the signal in the B25 transmit frequency band (this portion of the signal is not actually needed) through LNA3. In the current 2CA (B25+B66) scenario, the RF receiving module's primary purpose is to receive signals in the B66 and B25 bands. Path F, which receives signals in the B25 band (and which receives its own signals), also requires LNA3. Consequently, the B25 signal in Path F, which also uses LNA3, is severely interfered with. This can even prevent subsequent RF chips from properly receiving signals in the B25 band.

[0162] Of course, the above-mentioned 2CA (B25 and B66) scenarios of the RF module after the introduction of the multiplexer are only examples. In actual applications, the Long Term Evolution technology (LTE) defines the transmit and receive frequency bands from band1 to band88. Usually, the RF receiving module is designed to support some of the bands based on actual usage. Of course, international agreements also stipulate multiple CA scenarios; the RF receiving module will also be designed to support some of the CA scenarios based on actual usage. Therefore, the RF receiving module in the embodiment of the present application is only used as an example. In actual applications, the number of S ports of the antenna switch of the RF receiving module, the supported bands, the number of multiplexers, and the number of low-noise amplifiers may all be different.

[0163] However, without limiting the specific form of the RF receiving module, if the RF module supports multiple bands, including three bands: band i, band j, and band k, and the paths corresponding to band i and band j share a multiplexer, when band i and band k form a DLCA scenario, if the transmit frequency band of band k overlaps with the receive frequency band of band j, and if the paths corresponding to band k and band j share the same low-noise filter, interference may occur in the system.

[0164] Of course, in actual applications, even if the transmit frequency band of band k and the receive frequency band of band j do not overlap, there may still be signals of the receive frequency band of band j with higher energy in the surrounding environment, which may affect the normal transmission of the signal of the receive frequency band of bank k.

[0165] In order to solve the above-mentioned system interference problem in the above-mentioned RF receiving module, the embodiment of the present application adopts the following RF solution.

[0166] like Figure 3 As shown, the main reason for the aforementioned system interference issue is that after the introduction of a multiplexer, if one of the multiplexer's corresponding bands (for example, B66) and another band (for example, B25) form a CA scenario, an additional path corresponding to another band (for example, B3) corresponding to the multiplexer will exist. The paths corresponding to B3 and B25 share the same LNA3. Even if the receive band corresponding to B3 overlaps with the transmit band corresponding to B25, due to the close proximity of the two antennas on the electronic device, the antenna used for receiving signals can easily receive the higher-energy signal in the B3 receive band (the portion of the signal in the B25 transmit band transmitted by the other antenna that overlaps with the B3 receive band).

[0167] Therefore, the solution to the interference problem of this system is to eliminate any of the above conditions.

[0168] As an example, when the RF module needs to support 2CA (B66 and B25) scenarios, it is possible to set B66 and B25 not to share the multiplexer with other bands, but to use the filters of their respective corresponding receiving frequency bands. Figure 2 The problem shown is that there are many paths that are turned on at the same time, and there is signal leakage between the paths.

[0169] When the multiplexer is introduced, the reason for system interference is that the path corresponding to B3 and the path corresponding to B25 share the same LNA.

[0170] As an example, if the RF module needs to support 2CA (B66 and B25) scenarios, if the receive frequency band of the band (for example, B3) sharing the multiplexer with B66 overlaps with the transmit frequency band of B25, the paths corresponding to B3 and B25 can be set to not share the same LNA. If the receive frequency band of the band (if any) sharing the multiplexer with B25 overlaps with the transmit frequency band of B66, the paths corresponding to the band (if any) sharing the multiplexer with B25 and B66 can be set to not share the same LNA.

[0171] Of course, even if the receive frequency band (e.g., B3) of a multiplexer shared with B66 and the transmit frequency band of B25 do not overlap, interference may still occur due to the presence of higher-energy signals in the B3 receive frequency band in the surrounding environment. This application uses the case where the receive frequency band (e.g., B3) of a multiplexer shared with B66 and the transmit frequency band of B25 overlap as an example.

[0172] Similarly, in this example, B3, B25, and B66 are only used to illustrate three bands that meet specific conditions. In actual applications, for the three bands supported by the RF module: band i, band j, and band k, the channels corresponding to band i and band j share a multiplexer. When band i and band k form a DLCA scenario, if the transmit frequency band of band k overlaps with the receive frequency band of band j, the LNA in the channel corresponding to band k must be different from the LNA in the channel corresponding to band j.

[0173] Reference Figure 5 , which is a circuit structure diagram of a radio frequency module corresponding to this example.

[0174] This example sets the LNA in the path corresponding to B25 and the LNA in the path corresponding to B3 to different LNAs: the LNA in the path corresponding to B3 is set to remain the original LNA3, and the LNA in the path corresponding to B25 is set to LNA2.

[0175] If the electronic device transmits a signal in the B25 transmission band via antenna 1 or a signal in the B25 transmission band exists in the surrounding environment, the signal in the B25 transmission band may be received by antenna 2. After being received by antenna 2, the signal in the B25 transmission band may pass through path E, path F', and path G.

[0176] After the signal of the B25 transmission frequency band is received by antenna 2, the transmission process in path E refers to the description of the above embodiment. The filter in path E can filter out most of the signals of the B25 transmission frequency band. Even if some signals of the B25 transmission frequency band remain in path E, they are not sufficient to interfere with the normal reception of signals in the path corresponding to B25.

[0177] After the signal of the B25 transmission frequency band is received by antenna 2, the transmission process in path F' refers to the description of the above embodiment. The filter of path F' can filter out most of the signal of the B25 transmission frequency band. Even if some signal of the B25 transmission frequency band remains in path F', it is not enough to interfere with the normal reception signal of the path corresponding to B25.

[0178] After the signal of the B25 transmission frequency band is received by the antenna 2, the transmission process in the path G refers to the description of the above embodiment. The signal of the B25 transmission frequency band with a mid-frequency band of 1850MHz-1880MHz will pass through the LNA3 and be transmitted to the RF chip.

[0179] Even though the main purpose of the RF receiving module in the current 2CA (B25+B66) scenario is to receive signals in the B66 reception band and the B25 reception band, the path F' for receiving the B25 reception band signal uses LNA2, which is different from the LNA3 used in path G, thereby solving the problem of affecting the reception of the B25 reception band signal.

[0180] It should be noted that because the RF module may support a wide range of CA scenarios, the LNA for the B25 path cannot be arbitrarily set to any other LNA (except LNA3 in the B3 path). Setting it to another LNA may affect the use of other CA scenarios.

[0181] For example, when the LNA of the B25 path is configured on LNA1, since the 2CA (B25 and B66) scenario needs to be applied, if B66 and B25 use the same LNA, the use of the 2CA (B25 and B66) scenario will also be affected;

[0182] As another example, when the LNA of the B25 path is configured on LNA4, if the RF module also supports the 2CA (B7 and B25) scenario, B7 and B25 cannot use the same LNA.

[0183] As another example, in actual applications, the LNA in the B3 path may be placed on another LNA. Of course, when the LNA in the B3 path is placed on another LNA, the corresponding conditions for placing the LNA in the B25 path on another LNA must also be met. This application will not use diagrams to provide examples.

[0184] like Figure 5 Taking the RF module shown in the figure as an example, there are many restrictions when changing the LNA in one of the band paths. In some RF module designs, even setting the LNA in the band path to any LNA may cause interference issues in certain CA scenarios.

[0185] To solve this problem, an embodiment of the present application may provide an SPXT switch so that the LNA in the band path is set to a different LNA through the switch.

[0186] For example, when the RF module is used in the CA1 scenario, the LNA in the band path is switched to an LNA that does not affect the CA1 scenario; when the RF module is used in the CA2 scenario, the LNA in the band path is switched to an LNA that does not affect the CA2 scenario.

[0187] Reference Figure 6 , is a schematic diagram of the circuit structure of another RF module provided in an embodiment of the present application.

[0188] Among them, B25 corresponds to two channels: channel F and channel F'. The main difference between channel F and channel F' is that different LNAs are used.

[0189] Path F starts from the common end of the antenna switch, passes through S2, the filter corresponding to the B25 frequency band, LNA3, and finally passes through the multiplexer switch to the RF chip;

[0190] Path F' starts from the common end of the antenna switch, passes through S2, the filter corresponding to the B25 frequency band, LNA2, and finally passes through the multiplexer switch to the RF chip;

[0191] By setting a switch before entering the LNA, the signal can be selectively passed through LNA3 or LNA2 through the switch.

[0192] Reference Figure 7 ,for Figure 6 Schematic diagram of the circuit structure of the parts related to the switch and LNA in the example shown.

[0193] When the RF module is used in the 2CA (B25+B66) scenario, the S11 terminal of the switch is connected to the S21 terminal of the switch, the signal of the receiving frequency band of B25 enters LNA2, and the path corresponding to B25 is path F'.

[0194] When the RF module is used in other scenarios (for example, non-2CA (B25+B66)), to avoid other hidden dangers, the S11 terminal of the switch is connected to the S22 terminal of the switch, and the signal of the B25 receiving frequency band enters LNA3. The path corresponding to B25 is path F.

[0195] It should be noted that the switch is only used for example. In actual applications, the function of the switch can be implemented by a semiconductor device, for example, by a semiconductor device (for example, a diode, a transistor, a resistor) or a combination of semiconductor devices.

[0196] In summary, for the three bands supported by the RF module: band i, band j, and band k, the paths corresponding to band i and band j share a multiplexer. When band i and band k form a DLCA scenario, if the transmit frequency band of band k overlaps with the receive frequency band of band j, a switch must be used to set the LNA in the path corresponding to band k and the LNA in the path corresponding to band j to separate them. In other scenarios (not DLCA scenarios), a switch can be used to set the LNA in the path corresponding to band k and the LNA in the path corresponding to band j to share the same LNA.

[0197] The above example uses a switch to set B25 on different LNAs in different CA scenarios. In actual applications, a switch can also be used to set B3 on different LNAs in different CA scenarios.

[0198] Reference Figure 8 , is a schematic diagram of the circuit structure of another RF module provided in an embodiment of the present application.

[0199] The path F' corresponding to B25 is: starting from the common end of the antenna switch, passing through S2, the filter corresponding to B25, LNA2, and finally passing through the multiplexer switch to the RF chip;

[0200] B3 corresponds to two channels: channel G and channel G'. The main difference between channel G and channel G' is that different LNAs are used.

[0201] Path G starts from the common end of the antenna switch, passes through S1, the duplexer, LNA3, and finally passes through the multiplexer switch to the RF chip;

[0202] Path G' starts from the common end of the antenna switch, passes through S1, the duplexer, LNA2, and finally passes through the multiplexer switch to the RF chip;

[0203] By setting a switch before entering the LNA, the signal can be selectively passed through LNA3 or LNA2 through the switch.

[0204] Reference Figure 9 ,for Figure 8Schematic diagram of the circuit structure of the parts related to the switch and LNA in the example shown.

[0205] When the RF module is used in the 2CA (B25+B66) scenario, the S41 terminal of the switch is connected to the S52 terminal of the switch, the signal of the B3 receiving frequency band enters LNA3, and the path corresponding to B3 is path G.

[0206] When the RF module is used in other scenarios (for example, non-2CA (B25+B66)), to avoid other hidden dangers, the S41 end of the switch is connected to the S51 end of the switch, and the signal of the B3 receiving frequency band enters LNA2. The path corresponding to B3 is path G'.

[0207] It should be noted that the switch is only used for example. In actual applications, the function of the switch can be implemented by a semiconductor device, for example, by a semiconductor device (for example, a diode, a transistor, a resistor) or a combination of semiconductor devices.

[0208] Of course, other scenarios (e.g., non-2CA (B25+B66)) do not include 2CA (B3 and B40) carrier aggregation scenarios. The above process of switching the connected LNAs by switching is for example only. In actual applications, if there are no other interference issues, the filters corresponding to B25 and B3 can also be connected to different LNAs in some scenarios (e.g., non-2CA (B25+B66)).

[0209] The above examples all reduce interference by assigning different LNAs to the paths corresponding to B25 and B3. The present embodiment can also reduce interference by improving the isolation between different ports of LNAsW when the paths corresponding to B25 and B3 share the same LNA.

[0210] Reference Figure 10 , is a schematic diagram of the circuit structure of another RF module provided in an embodiment of the present application.

[0211] exist Figure 3 Based on the RF module shown, an SPST switch and load are added to LNA3 in path B3. The load transmits the interference signal transmitted in path B3 to ground. This interference is caused by the electronic device transmitting the signal in the B25 transmission frequency band.

[0212] If the electronic device transmits a signal in the B25 transmission band through antenna 1 or a signal in the B25 transmission band exists in the surrounding environment, the signal in the B25 transmission band may be received by antenna 2. After being received by antenna 2, the signal in the B25 transmission band may pass through path E, path F, and path G.

[0213] After the signal of the B25 transmission frequency band is received by antenna 2, the transmission process in path E refers to the description of the above embodiment. The filter in path E can filter out most of the signals of the B25 transmission frequency band. Even if some signals of the B25 transmission frequency band remain in path E, they are not sufficient to interfere with the normal reception of signals in the path corresponding to B25.

[0214] After the signal of the B25 transmission frequency band is received by antenna 2, the transmission process in path F refers to the description of the above embodiment. The filter in path F can filter out most of the signal of the B25 transmission frequency band. Even if some signal of the B25 transmission frequency band remains in path F, it is not enough to interfere with the normal reception signal of the path corresponding to B25.

[0215] After the signal in the B25 transmit band is received by antenna 2, it is transmitted along path G: After being received by antenna 2, the signal in the B25 transmit band (1850MHz-1915MHz) passes through the common end of the antenna switch and passes through the filters in the SI and B3 receive bands. Since the B3 receive band is 1805MHz-1880MHz, the filters in the B3 receive band have no effect on filtering out the signals in the 1850MHz-1880MHz band within the B25 transmit band. In theory, these signals would pass through LNA3 and be transmitted to the RF chip. However, due to the impedance set in LNA SW, this impedance can transmit this portion of the signal to ground before entering LNA3.

[0216] Reference Figure 11 As shown, Figure 8 The circuit structure diagram of the part related to LNA SW in the RF module is shown.

[0217] In the 2CA (B25+B66) scenario, the switch terminals S31 and S32 are connected, and the switch is in the on state. After the signal in the B25 transmit frequency band transmitted by the electronic device is received by antenna 2 and enters LNA SW through path G, most of it will be transmitted to ground through resistor R, reducing the amount of signal entering LNA 3. This reduces the impact on the RF module's reception of the B25 receive frequency band signal through path F corresponding to B25 in the 2CA (B25+B66) scenario.

[0218] Of course, the RF module may also use the path corresponding to B3 in other scenarios. To prevent the signal in the B3 receive band, which should be sent to LNA3 by the RF receiving module itself, from being transmitted to ground through this load path when using the path corresponding to B3, it is necessary to set the switch to the off state. Therefore, in non-2CA (B25+B66) scenarios, the switch is in the non-conducting state. This prevents the signal in the B3 receive band from being transmitted to ground through the path where resistor R is located when the signal enters the subsequent LNA3. It should be noted that resistor R is only an example and can be any electronic component with impedance, such as a diode, capacitor, inductor, etc.

[0219] In a specific implementation, the switch and resistor R are connected in series between node a and ground, where node a is located between the multiplexer and LNA SW in path B3. To ensure that the signal is transmitted to ground as much as possible through the closed switch and resistor R, rather than toward the LNA, resistor R is configured so that the impedance from node a to resistor R is significantly smaller than the impedance from node a to the LNA.

[0220] It should be noted that the switch is only used as an example. In actual applications, the switch may be a semiconductor device (eg, a diode, a transistor) or may be composed of a plurality of semiconductor devices.

[0221] It should be understood that in this example, B3, B25, and B66 are merely examples of three bands that meet specific conditions. In actual applications, for the three bands supported by the RF module: band i, band j, and band k, the paths corresponding to band i and band j share a multiplexer. In a DLCA scenario with band i and band k, if the transmit frequency band of band k overlaps with the receive frequency band of band j, and the LNAs in the paths corresponding to band k and band j share the same LNA, a switch and resistor are added to the LNA SW of the path corresponding to band j to transmit the signal in that path to ground, reducing interference with the path corresponding to band k on the same LAN.

[0222] In practical applications, a switch with a single-pole double-throw function can also be set to achieve the above functions.

[0223] Reference Figure 12 As described above, the switches (S31, S32) are changed to switches (S61, S71, S72).

[0224] Among them, when the RF module is used in the 2CA (B25+B66) scenario, the S61 end of the switch is connected to the S72 end of the switch, and the S61 end of the switch is disconnected from the S71 end of the switch. Most of the received signals in the B3 frequency band will be transmitted to the ground through the path of resistor R, reducing the amount of signals entering LNA3, thereby reducing the impact on the RF module's reception of signals in the B25 receive frequency band through path F corresponding to B25 in the 2CA (B25+B66) scenario.

[0225] When the RF module is used in other scenarios (for example, non-2CA (B25+B66)), to avoid other hidden dangers, the S61 end of the switch is connected to the S71 end of the switch, and the S61 end of the switch is disconnected from the S72 end of the switch to prevent the B3 frequency band signal that needs to be received normally from being transmitted to the ground.

[0226] It should be noted that the switch is only used for example. In actual applications, the function of the switch can be implemented by a semiconductor device, for example, by a semiconductor device (for example, a diode, a transistor, a resistor) or a combination of semiconductor devices.

[0227] The above examples use B66, B3, and B25 as examples. In actual applications, if the RF transmission module has other bands that meet specific conditions, the solution for reducing signal interference provided in the embodiments of the present application can also be adopted.

[0228] As another example, the RF receiving module supports multiple bands including band 1, band 2, and band 3, and supports 2CA (B1 and B2) scenarios. At the same time, the RF module is designed to share a multiplexer for filtering between B1 and B3. When the B2 and B3 channels share the same LNA, switches and impedances are added to the LNA CW of the B2 channel to transmit the signal in the B2 channel to ground, thereby reducing interference with the B1 channel. Of course, this applies whether the B1 transmit frequency (1920 MHz to 1980 MHz) and the B2 receive frequency (1930 MHz to 1990 MHz) overlap or not.

[0229] For other bands supported by the RF module that meet the above conditions, no further examples are given.

[0230] As another embodiment of the present application, the radio frequency module includes: a transmission port, and further includes:

[0231] a first filter for transmitting signals of a first frequency band (e.g., B66) and a second frequency band (e.g., B3);

[0232] a second filter for transmitting a signal in a third frequency band (e.g., B25);

[0233] a first amplifier (e.g., LNA1) configured to transmit a signal of a first frequency band (B66) when coupled to the first filter;

[0234] a second amplifier (e.g., LNA3) configured to transmit a signal of a second frequency band (B3) when coupled to the first filter;

[0235] a third amplifier (e.g., LNA2), configured to transmit a signal in a third frequency band (B25) when in conduction with the second filter;

[0236] When the first filter and the second filter are respectively connected to the transmission port, the first amplifier and the first filter are connected, the second filter and the first filter are connected, and the third amplifier and the second filter are connected.

[0237] by Figure 5 The RF module shown is used as an example. Figure 5 The duplexer in the RF module shown here can be an example of a first filter, and the filter used to transmit the received signal of B25 can be an example of a second filter. B66 can be an example of a first frequency band, B3 can be an example of a second frequency band, and B25 can be an example of a third frequency band. LNA1 can be an example of a first amplifier, LNA2 can be an example of a third amplifier, and LNA3 can be an example of a second amplifier. The transmission port can be ANT.

[0238] Antenna 2 in the above example can be an example of the first antenna. When the first filter and the second filter are respectively connected to the first antenna, it may be a carrier aggregation scenario of the first frequency band and the third frequency band, or it may be a carrier aggregation scenario of the second frequency band and the third frequency band, or it may be a carrier aggregation scenario of the first frequency band, the second frequency band and the third frequency band.

[0239] If the transmission frequency band of the third frequency band at least partially overlaps with the receiving frequency band of the second frequency band, it will not be a carrier aggregation scenario of the second frequency band and the third frequency band, nor will it be a carrier aggregation scenario of the first frequency band, the second frequency band and the third frequency band; that is, the current scenario is a carrier aggregation scenario of the first frequency band and the third frequency band.

[0240] To avoid mutual interference when signals of different frequency bands share the same amplifier, it is necessary to set the amplifiers connected to the filters of the three frequency bands to be different amplifiers. Of course, the amplifier in the RF module can be a low-noise amplifier.

[0241] Figure 5 The RF module shown operates in a 2CA (B25+B66) carrier aggregation scenario.

[0242] It should be noted that bandi, bandj, and bandk in the above examples may also be examples of the first frequency band, the second frequency band, and the third frequency band.

[0243] As another embodiment of the present application, the second amplifier is further configured to transmit a signal of a third frequency band when connected to the second filter;

[0244] In a case where at least one of the first filter and the second filter and the transmission port are non-conductive, the second filter is connected to the second amplifier.

[0245] As another embodiment of the present application, the radio frequency module further includes:

[0246] The first switch unit has a first common end connected to the second filter; the first port of the first switch unit is connected to the second amplifier; and the second port of the first switch unit is connected to the third amplifier.

[0247] When the first filter and the second filter are respectively connected to the transmission port, the first common terminal is connected to the second port and is not connected to the first port;

[0248] In a case where at least one of the first filter and the second filter is not conductively connected to the transmission port, the first common terminal is conductively connected to the first port, and is not conductively connected to the second port.

[0249] by Figure 6 The RF module shown is used as an example. When at least one of the first filter and the second filter and the first antenna are disconnected, indicating that the RF module is not operating in a 2CA (B25+B66) carrier aggregation scenario, the filter and LNA3 for transmitting B25 receive signals can be connected. Whether this connection is established depends on whether S2 in the ASW switch is on. Of course, when the RF module is operating in a 2CA (B25+B66) carrier aggregation scenario, the filter and LNA2 for transmitting B25 receive signals can be connected.

[0250] by Figure 7 The connection relationship shown is taken as an example. The switch in the figure is an example of the first switch unit, S11 is an example of the first common terminal, S21 is an example of the second port, and S22 is an example of the first port.

[0251] As another embodiment of the present application, the third amplifier is further configured to transmit a signal of the second frequency band when connected to the first filter;

[0252] In a case where at least one of the first filter and the second filter and the transmission port are non-conductive, the first filter is connected to the third amplifier.

[0253] As another embodiment of the present application, the radio frequency module further includes:

[0254] The second switch unit has a second common terminal connected to the first filter; a third port of the second switch unit is connected to the second amplifier; and a fourth port of the second switch unit is connected to the third amplifier.

[0255] When the first filter and the second filter are respectively connected to the transmission port, the second common terminal is connected to the third port and is not connected to the fourth port;

[0256] In a case where at least one of the first filter and the second filter and the transmission port are not conductive, the second common terminal and the fourth port are conductive, and the third port is not conductive.

[0257] In the present application, the LNA connected to the filter transmitting the B25 receive signal is set to LNA2, and the LNA connected to the filter transmitting the B3 receive signal is connected to LNA3 in the 2CA (B25 + B66) carrier aggregation scenario, and is not connected to LNA2 in the 2CA (B25 + B66) carrier aggregation scenario, thereby reducing interference in the 2CA (B25 + B66) carrier aggregation scenario.

[0258] Alternatively, the LNA connected to the filter transmitting the B25 receive signal is set to LNA3, and the LNA connected to the filter transmitting the B3 receive signal is connected to LNA2 in a 2CA (B25 + B66) carrier aggregation scenario, but not to LNA3 in a 2CA (B25 + B66) carrier aggregation scenario, thereby reducing interference in the 2CA (B25 + B66) carrier aggregation scenario.

[0259] by Figure 8 The RF module shown is taken as an example. When at least one of the first filter and the second filter and the first antenna are not conductive, it means that the RF module is not operating in the 2CA (B25+B66) carrier aggregation scenario. The filter and LNA2 for transmitting the received signal of B3 can be set to be connected. Of course, when the RF module operates in the 2CA (B25+B66) carrier aggregation scenario, the filter and LNA3 for transmitting the received signal of B3 can be set to be conductive.

[0260] by Figure 9 The connection relationship shown is taken as an example. The switch in the figure is an example of the second switch unit, S41 is an example of the second common terminal, S52 is an example of the third port, and S51 is an example of the fourth port.

[0261] As another embodiment of the present application, when at least one of the first filter and the second filter and the transmission port are not conductive, the second filter is connected to the third amplifier; the first filter is connected to the second amplifier, and the first filter is also connected to the first amplifier.

[0262] by Figure 5 As an example, regardless of whether it is in a 2CA (B25+B66) carrier aggregation scenario, the amplifiers connected to the filters transmitting the received signals of each frequency band remain unchanged and are on different LNAs.

[0263] As another embodiment of the present application, the radio frequency module further includes: a fifth port, a sixth port, and a seventh port;

[0264] When receiving the signal of the first frequency band and the signal of the third frequency band at the same time, the first filter and the second filter are respectively connected to the transmission port;

[0265] The first filter receives a signal of the first frequency band, and the signal of the first frequency band is transmitted to the fifth port through the first amplifier;

[0266] The first filter receives a signal of the second frequency band, and the signal of the second frequency band is transmitted to the sixth port through the second amplifier;

[0267] The second filter receives the signal of the third frequency band, and the signal of the third frequency band is transmitted to the seventh port through the third amplifier.

[0268] by Figure 5 As an example, the fifth port may be OUT1 in the RF module, the sixth port may be OUT3, and the seventh port may be OUT2.

[0269] As another embodiment of the present application, the first filter is a multiplexer;

[0270] The input port of the multiplexer is used to conduct with the transmission port;

[0271] The first output port of the multiplexer is connected to the first amplifier;

[0272] The second output port of the multiplexer is used to be connected to the second amplifier when the duplexer and the second filter are respectively connected to the transmission port.

[0273] As another embodiment of the present application, the radio frequency module has a transmission port, and the radio frequency module further includes:

[0274] a first filter connected to the first amplifier and also connected to the second amplifier;

[0275] a second filter connected to the second amplifier;

[0276] a first load unit, wherein a first end of the first load unit is connected between the first filter and the second amplifier, and a second end of the first load unit is grounded;

[0277] When the first filter and the second filter are respectively connected to the transmission port, the first load unit is used to transmit the received signal to the ground.

[0278] As another embodiment of the present application, when the first filter and the second filter are respectively connected to the transmission port, the first load unit is connected to the first filter;

[0279] In a case where at least one of the first filter and the second filter is not conductively connected to the transmission port, the first load unit is not conductively connected to the first filter.

[0280] The impedance from the first end of the first load unit to the first load unit is smaller than the impedance from the first end of the first load unit to the second amplifier.

[0281] As another embodiment of the present application, the radio frequency module further includes:

[0282] The third switch unit is connected between the first filter and the second amplifier, and the first load unit is arranged in the third switch unit.

[0283] As another embodiment of the present application, the third switch unit includes: an eighth port, a ninth port, a tenth port, and a fourth switch;

[0284] The eighth port is connected to the first filter, the ninth port is connected to the second filter, and the tenth port is connected to the second amplifier; the first end of the first load unit is connected to the eighth port through a fourth switch;

[0285] When the first filter and the second filter are respectively connected to the transmission port, the fourth switch is turned on;

[0286] In a case where at least one of the first filter and the second filter and the transmission port are not conductive, the fourth switch is non-conductive.

[0287] by Figure 10 and Figure 11 As an example, the LNA3 amplifier switch (ie, the third switch unit) may include a fourth switch having ports S31 and S32 and a resistor R. The eighth port is connected to a node a, which is only used for example and may be any node between the duplexer and the LNA3.

[0288] Of course, the resistor may be located on the grounded side, and the third switch unit may also be located on the grounded side (not shown in the figure).

[0289] As another embodiment of the present application, the third switch unit includes: an eighth port, a ninth port, a tenth port, and a fifth switch;

[0290] The eighth port is connected to the first filter, the ninth port is connected to the second filter, and the tenth port is connected to the second amplifier; the common end of the fifth switch is connected to the eight ports; the first end of the fifth switch is conductively connected to the tenth port; and the second end of the fifth switch is connected to the first end of the first load unit;

[0291] When the first filter and the second filter are respectively connected to the transmission port, the common end of the fifth switch and the second end of the fifth switch are connected;

[0292] In a case where at least one of the first filter and the second filter and the transmission port are not conductive, the common end of the fifth switch and the first end of the fifth switch are conductive.

[0293] by Figure 12 As an example, a switch having ports S61, S71, and S71 in the figure is used as an example of a fifth switch, S61 is connected to the eighth port (for connecting to a duplexer) as a common end, S71 is connected to the tenth port (for connecting to LNA3) as a first end, and S72 is connected to a resistor as a second end.

[0294] As another embodiment of the present application, the electronic device in which the radio frequency module is located includes:

[0295] The radio frequency module in any of the above embodiments;

[0296] A first antenna is connected to the transmission port of the radio frequency module;

[0297] The RF chip is connected to the output port of the RF module;

[0298] by Figure 4 As an example, antenna 1 can be used as an example of the second antenna.

[0299] It should be understood that the size of the serial numbers of the steps in the above embodiments does not mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of this application.

[0300] An embodiment of the present application further provides a computer-readable storage medium, which stores a computer program. When the computer program is run on an electronic device, it can implement the steps in the above-mentioned various method embodiments.

[0301] The embodiments of the present application further provide a computer program product. When the computer program product is run on an electronic device or a wireless router, the electronic device can implement the steps in the above-mentioned various method embodiments.

[0302] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the present application implements all or part of the processes in the above-mentioned embodiment method, which can be completed by instructing the relevant hardware through a computer program. The computer program can be stored in a computer-readable storage medium, and when the computer program is executed by the processor, it can implement the steps of the above-mentioned various method embodiments. Among them, the computer program includes computer program code, and the computer program code can be in source code form, object code form, executable file or some intermediate form. The computer-readable medium may include at least: any entity or device capable of carrying the computer program code to the first device, a recording medium, a computer memory, a read-only memory (ROM), a random access memory (RAM), an electric carrier signal, a telecommunication signal and a software distribution medium. For example, a USB flash drive, a mobile hard disk, a magnetic disk or an optical disk. In some jurisdictions, according to legislation and patent practice, computer-readable media cannot be electric carrier signals and telecommunication signals.

[0303] The present application also provides a chip comprising a processor coupled to a memory, wherein the processor invokes a computer program stored in the memory to implement the steps of any method embodiment of the present application. The chip may be a single chip or a chip module composed of multiple chips.

[0304] In the above embodiments, the description of each embodiment has its own focus. For parts that are not described or recorded in detail in a certain embodiment, reference can be made to the relevant description of other embodiments.

[0305] Those skilled in the art will appreciate that the units and method steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

[0306] The above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present application, and should all be included in the scope of protection of the present application.

Claims

1. A radio frequency module having a transmission port, characterized in that: include: a first filter, configured to transmit signals of a first frequency band and a second frequency band; a second filter for transmitting a signal in a third frequency band; a first amplifier, configured to transmit signals of the first frequency band when connected to the first filter; a second amplifier, configured to transmit signals of the second frequency band when connected to the first filter; a third amplifier, configured to transmit the signal of the third frequency band when connected to the second filter; When the first filter and the second filter are respectively connected to the transmission port, the first amplifier and the first filter are connected, the second filter and the first filter are connected, and the third amplifier and the second filter are connected.

2. The radio frequency module according to claim 1, wherein: The transmission frequency band of the third frequency band at least partially overlaps with the reception frequency band of the second frequency band.

3. The radio frequency module according to claim 1 or 2, wherein: The second amplifier is further configured to transmit the signal of the third frequency band when connected to the second filter; In a case where at least one of the first filter and the second filter and the transmission port are not conductive, the second filter and the second amplifier are conductive.

4. The radio frequency module according to claim 3, wherein: The radio frequency module also includes: A first switch unit, wherein a first common end of the first switch unit is connected to the second filter; a first port of the first switch unit is connected to the second amplifier; and a second port of the first switch unit is connected to the third amplifier.

5. The radio frequency module according to claim 4, wherein: When the first filter and the second filter are respectively connected to the transmission port, the first common terminal is connected to the second port and is not connected to the first port; In a case where at least one of the first filter and the second filter is not conductively connected to the transmission port, the first common terminal is conductively connected to the first port and is not conductively connected to the second port.

6. The radio frequency module according to claim 1 or 2, wherein: The third amplifier is further configured to transmit the signal of the second frequency band when connected to the first filter; In a case where at least one of the first filter and the second filter and the transmission port are not conductive, the first filter and the third amplifier are conductive.

7. The radio frequency module according to claim 6, wherein: The radio frequency module also includes: A second switch unit, wherein the second common terminal of the second switch unit is connected to the first filter; the third port of the second switch unit is connected to the second amplifier; and the fourth port of the second switch unit is connected to the third amplifier.

8. The radio frequency module according to claim 7, wherein: When the first filter and the second filter are respectively connected to the transmission port, the second common terminal is connected to the third port and is not connected to the fourth port; In a case where at least one of the first filter and the second filter is not conductively connected to the transmission port, the second common terminal is conductively connected to the fourth port and is not conductively connected to the third port.

9. The radio frequency module according to claim 1 or 2, wherein: When at least one of the first filter and the second filter is not connected to the transmission port, the second filter is connected to the third amplifier; the first filter is connected to the second amplifier, and the first filter is connected to the first amplifier.

10. The radio frequency module according to any one of claims 1 to 9, wherein: The radio frequency module further includes: a fifth port, a sixth port and a seventh port; When simultaneously receiving a signal of the first frequency band and a signal of the third frequency band, the first filter and the second filter are respectively connected to the transmission port; The first filter receives a signal of a first frequency band, and the signal of the first frequency band is transmitted to the fifth port through the first amplifier; The first filter receives a signal of a second frequency band, and the signal of the second frequency band is transmitted to the sixth port through the second amplifier; The second filter receives a signal of a third frequency band, and the signal of the third frequency band is transmitted to the seventh port through the third amplifier.

11. The radio frequency module according to any one of claims 1 to 10, wherein: The first filter is a multiplexer; The input port of the multiplexer is used to be connected to the transmission port; The first output port of the multiplexer is connected to the first amplifier; The second output port of the multiplexer is used to connect to the second amplifier when the multiplexer and the second filter are respectively connected to the transmission port.

12. A radio frequency module having a transmission port, characterized in that: include: a first filter connected to the first amplifier and also connected to the second amplifier; a second filter connected to the second amplifier; a first load unit, wherein a first end of the first load unit is connected between the first filter and the second amplifier, and a second end of the first load unit is grounded; When the first filter and the second filter are respectively connected to the transmission port, the first load unit is used to transmit the received signal to the ground.

13. The radio frequency module according to claim 12, wherein: When the first filter and the second filter are respectively connected to the transmission port, the first load unit is connected to the first filter; In a case where at least one of the first filter and the second filter is not conductively connected to the transmission port, the first load unit is not conductively connected to the first filter.

14. The radio frequency module according to claim 13, wherein: The impedance from the first end of the first load unit to the first load unit is smaller than the impedance from the first end of the first load unit to the second amplifier.

15. The radio frequency module according to any one of claims 12 to 14, wherein: The radio frequency module also includes: The third switch unit is connected between the first filter and the second amplifier, and the first load unit is arranged in the third switch unit.

16. The radio frequency module according to claim 15, wherein: The third switch unit includes: an eighth port, a ninth port, a tenth port, and a fourth switch; The eighth port is connected to the first filter, the ninth port is connected to the second filter, and the tenth port is connected to the second amplifier; the first end of the first load unit is connected to the eighth port through a fourth switch; When the first filter and the second filter are respectively connected to the transmission port, the fourth switch is turned on; In a case where at least one of the first filter and the second filter and the transmission port are not conductive, the fourth switch is non-conductive.

17. The radio frequency module according to claim 15, wherein: The third switch unit includes: an eighth port, a ninth port, a tenth port, and a fifth switch; The eighth port is connected to the first filter, the ninth port is connected to the second filter, and the tenth port is connected to the second amplifier; the common end of the fifth switch is connected to the eight ports; the first end of the fifth switch is conductively connected to the tenth port; and the second end of the fifth switch is connected to the first end of the first load unit; When the first filter and the second filter are respectively connected to the transmission port, the common end of the fifth switch and the second end of the fifth switch are connected; In a case where at least one of the first filter and the second filter and the transmission port are not conductive, the common end of the fifth switch and the first end of the fifth switch are conductive.

18. The radio frequency module according to any one of claims 12 to 17, wherein: When the first filter and the second filter are connected to the transmission port respectively: The first filter receives a signal of a first frequency band, and the signal of the first frequency band is transmitted to the fifth port of the radio frequency module through the first amplifier; The first filter receives a signal of a second frequency band, and the signal of the second frequency band is transmitted to the ground through the first load unit; The second filter receives a signal of a third frequency band, and the signal of the third frequency band is transmitted to the seventh port of the RF module through the second amplifier. The transmitting frequency band of the third frequency band at least partially overlaps with the receiving frequency band of the second frequency band.

19. An electronic device, characterized in that: include: The radio frequency module according to any one of claims 1 to 11 or the radio frequency module according to any one of claims 12 to 18; A first antenna is connected to the transmission port of the radio frequency module; The radio frequency chip is connected to the output port of the radio frequency module.

20. The electronic device according to claim 19, wherein In the case of simultaneously receiving a signal of the first frequency band and a signal of the third frequency band: The first antenna receives signals of a first frequency band, a second frequency band, and a third frequency band; The signal of the first frequency band and the signal of the third frequency band are transmitted to the radio frequency chip through the radio frequency module; The signal of the second frequency band is transmitted to the RF chip through the RF module in the electronic device, or is transmitted to the ground through the RF module.

21. The electronic device according to claim 19 or 20, wherein: Also includes: a second antenna, for transmitting signals; In a case where a signal of a first frequency band and a signal of a third frequency band are received through the first antenna, and the first signal of the third frequency band is transmitted through the second antenna: The first antenna receives a second signal, and the second signal is transmitted to the ground through the first filter in the RF module, or the second signal is transmitted to the RF chip through the first filter and second amplifier in the RF module. The second signal is a signal in the first signal within the receiving frequency band of the second frequency band.

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