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 problem that the radio frequency performance of the electronic equipment is reduced due to the influence of antenna isolation is solved. The radio frequency module comprises a first radio frequency channel and a second radio frequency channel, the first radio frequency channel comprises a radio frequency processing device, a filter circuit and a first antenna, the radio frequency processing device is coupled with the first antenna through the filter circuit, and the second radio frequency channel comprises a second antenna. The filter circuit is used for inhibiting the signal transmitted by the second antenna from being transmitted to the radio frequency processing device when the first antenna receives the signal transmitted by the second antenna, or inhibiting the signal transmitted by the second antenna from being transmitted to the radio frequency processing device when the signal transmitted by the second antenna is transmitted to the radio frequency processing device and the signal transmitted by the second antenna distorts to generate harmonic waves. The suppressed harmonics are transmitted from the radio frequency processing device to the first antenna.

Description

Technical Field

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

[0002] In modern communication systems, in order to meet the requirements of electronic equipment communication performance and antenna structure adaptation, the spacing between different antennas is small, so the isolation between antennas is poor. In the case of poor antenna isolation, the nonlinear devices in the RF path where the antenna is located may be excited by the signal emitted by the RF path where the adjacent antenna is located, causing the harmonics of the electronic equipment to exceed the standard, thereby affecting the RF performance of the electronic equipment. Summary of the invention

[0003] The embodiments of the present application provide a radio frequency module and an electronic device, which are used to improve the problem that the radio frequency performance of the electronic device is reduced due to the influence of antenna isolation.

[0004] To achieve the above objectives, the embodiments of the present application adopt the following technical solutions: In a first aspect, the present application provides a radio frequency module, including a first radio frequency channel and a second radio frequency channel, the first radio frequency channel including a radio frequency processing device, a filtering circuit and a first antenna, the radio frequency processing device being coupled to the first antenna through the filtering circuit, the second radio frequency channel including a second antenna, the filtering circuit being used to suppress the transmission of the signal transmitted by the second antenna to the radio frequency processing device when the first antenna receives the signal transmitted by the second antenna, or to suppress the transmission of the harmonics from the radio frequency processing device to the first antenna when the signal transmitted by the second antenna is distorted and generates harmonics when the signal transmitted by the second antenna is transmitted to the radio frequency processing device.

[0005] In the above technical solution, a filtering circuit is used to reduce the influence of the signal transmitted by the second RF channel on the RF processing device in the first RF channel, so that the radiation value of the RF processing device meets the design requirements, thereby improving the influence of the excessive radiation value on the RF performance of the electronic equipment.

[0006] In a possible implementation manner of the first aspect, the radio frequency processing device is a nonlinear device.

[0007] In another possible implementation manner of the first aspect, a degree of isolation between the first antenna and the second antenna is less than an isolation threshold.

[0008] In another possible implementation manner of the first aspect, an operating frequency band of the first radio frequency channel does not overlap with an operating frequency band of the second radio frequency channel.

[0009] In another possible implementation manner of the first aspect, the operating frequency band of the first RF channel and the operating frequency band of the second RF channel do not overlap, including: the maximum frequency value of the frequency band of the signal transmitted by the second RF channel is less than the minimum frequency value of the frequency band of the signal received by the first RF channel, or the minimum frequency value of the frequency band of the signal transmitted by the second RF channel is greater than the maximum frequency value of the frequency band of the signal received by the first RF channel.

[0010] In another possible implementation of the first aspect, the filtering circuit includes a first filtering circuit, and the radio frequency processing device is coupled to the first antenna through the first filtering circuit; The first filtering circuit is configured to, when the first antenna receives a signal transmitted by the second antenna, suppress the signal transmitted by the second antenna from being transmitted to the radio frequency processing device.

[0011] In the above technical solution, when the frequency band of the signal received by the first RF channel does not overlap with the frequency band of the signal transmitted by the second RF channel, by suppressing the interference signal from entering the nonlinear device along the RF channel, the nonlinear device in the first RF channel can be avoided from being excited without changing the transmission power of the second RF channel, thereby reducing the impact on the RF performance of the electronic device.

[0012] In another possible implementation manner of the first aspect, an operating frequency band of the first radio frequency channel overlaps with an operating frequency band of the second radio frequency channel.

[0013] In another possible implementation manner of the first aspect, the overlap between the operating frequency band of the first RF channel and the operating frequency band of the second RF channel includes: the operating frequency band of the first RF channel partially overlaps with the operating frequency band of the second RF channel, or the operating frequency band of the first RF channel and the operating frequency band of the second RF channel have a complete overlapping relationship.

[0014] In another possible implementation of the first aspect, the filtering circuit includes a second filtering circuit, and the radio frequency processing device is coupled to the first antenna through the second filtering circuit; The second filtering circuit is configured to, when the signal transmitted by the second antenna is transmitted to the radio frequency processing device and the signal transmitted by the second antenna is distorted to generate harmonics, suppress the harmonics from being transmitted from the radio frequency processing device to the first antenna.

[0015] In the above technical solution, when the frequency band of the RF signal transmitted by the RF channel does not overlap with the frequency band of the RF signal transmitted by the adjacent RF channel, the conduction of harmonics in the RF channel is suppressed to avoid the radiation of harmonics through the first antenna, thereby further reducing the impact on the RF performance of the electronic device.

[0016] In another possible implementation of the first aspect, the filtering circuit includes a first filtering circuit and a second filtering circuit, and the RF processing device is coupled to the first antenna through the first filtering circuit and the second filtering circuit in sequence, and the first filtering circuit is configured to, when the first antenna receives a signal transmitted by the second antenna, suppress the signal transmitted by the second antenna from being transmitted to the RF processing device, and the second filtering circuit is configured to, when the signal transmitted by the second antenna is transmitted to the RF processing device and the signal transmitted by the second antenna is distorted to produce harmonics, suppress the harmonics from being transmitted from the RF processing device to the first antenna.

[0017] In another possible implementation manner of the first aspect, the radio frequency module further includes a shielding cover, and the radio frequency processing component is disposed in the shielding cover.

[0018] In a second aspect, the present application provides an electronic device, including a power supply and a radio frequency module, wherein the power supply is used to supply power to the radio frequency module, and the radio frequency module includes the radio frequency module of the first aspect mentioned above.

[0019] The technical effects of the second aspect refer to the technical effects of the first aspect and any of its embodiments, and will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A schematic diagram of the structure of an electronic device provided in an embodiment of the present application; Figure 2 A schematic diagram of the structure of a radio frequency module provided in an embodiment of the present application; Figure 3 A schematic diagram of the structure of another radio frequency module provided in an embodiment of the present application; Figure 4 A schematic diagram of the structure of another radio frequency module provided in an embodiment of the present application; Figure 5 A schematic diagram of the structure of a radio frequency module in the related technology provided in an embodiment of the present application; Figure 6 A schematic diagram of the structure of another radio frequency module provided in an embodiment of the present application; Figure 7 A schematic diagram of the structure of another radio frequency module provided in an embodiment of the present application; Figure 8 A schematic diagram of the relationship between the operating frequency bands of a first radio frequency channel and a second radio frequency channel provided in an embodiment of the present application; Fig. 9 A circuit diagram of a filter circuit provided in an embodiment of the present application; Fig.10 A circuit diagram of another filter circuit provided in an embodiment of the present application; Fig.11 A schematic diagram of the structure of another radio frequency module provided in an embodiment of the present application; Fig.12 A schematic diagram of the relationship between the operating frequency bands of another first radio frequency channel and a second radio frequency channel provided in an embodiment of the present application; Fig.13 A schematic diagram of the structure of another radio frequency module provided in an embodiment of the present application; Fig.14 A schematic diagram of the structure of another radio frequency module provided in an embodiment of the present application. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0022] The terms "first", "second", etc. involved in the embodiments of the present application are only used to distinguish features of the same type and cannot be understood as indicating relative importance, quantity, order, etc.

[0023] The terms "exemplary" or "for example" and the like in the embodiments of the present application are used to indicate examples, illustrations or descriptions. Any embodiment or design described as "exemplary" or "for example" in the present application should not be interpreted as being more preferred or more advantageous than other embodiments or designs. Specifically, the use of the terms "exemplary" or "for example" is intended to present the related concepts in a specific way.

[0024] The terms "coupling" and "connection" involved in the embodiments of the present application should be understood in a broad sense. For example, they may refer to a direct physical connection, or an indirect connection achieved through electronic devices, such as a connection achieved through resistors, inductors, capacitors or other electronic devices.

[0025] The embodiment of the present application provides an electronic device, which can be fixed or mobile. In addition, the electronic device can also be called user equipment (UE), terminal, terminal equipment, mobile station (MS), mobile terminal (MT), access terminal equipment, vehicle-mounted terminal equipment, industrial control terminal equipment, mobile station, remote station, remote terminal equipment, mobile device, wireless communication equipment, terminal agent or terminal device, etc. Exemplarily, the electronic device may be a mobile phone, a tablet computer (pad), a desktop computer, a laptop computer, an all-in-one computer, a vehicle-mounted terminal, a virtual reality (VR) terminal device, an augmented reality (AR) terminal device, a wireless terminal in industrial control, a wireless terminal in self driving, a wireless terminal in remote medical surgery, a wireless terminal in a smart grid, a wireless terminal in transportation safety, a wireless terminal in a smart city, a wireless terminal in a smart home, a cellular phone, a cordless phone, a session initiation protocol (SIP) phone, a wireless local loop (WLL) station, a personal digital assistant (PDA), a handheld device with wireless communication function, a computing device or other processing device connected to a wireless modem, a wearable device, a terminal device in a future mobile communication network, or a terminal device in a future evolved public mobile land network (PLMN), etc.

[0026] The embodiment of the present application provides an electronic device, which can be fixed or mobile. In addition, the electronic device can also be called user equipment (UE), terminal, terminal equipment, mobile station (MS), mobile terminal (MT), access terminal equipment, vehicle-mounted terminal equipment, industrial control terminal equipment, mobile station, remote station, remote terminal equipment, mobile device, wireless communication equipment, terminal agent or terminal device, etc. Exemplarily, the electronic device may be a mobile phone, a tablet computer (pad), a desktop computer, a laptop computer, an all-in-one computer, a vehicle-mounted terminal, a virtual reality (VR) terminal device, an augmented reality (AR) terminal device, a wireless terminal in industrial control, a wireless terminal in self driving, a wireless terminal in remote medical surgery, a wireless terminal in a smart grid, a wireless terminal in transportation safety, a wireless terminal in a smart city, a wireless terminal in a smart home, a cellular phone, a cordless phone, a session initiation protocol (SIP) phone, a wireless local loop (WLL) station, a personal digital assistant (PDA), a handheld device with wireless communication function, a computing device or other processing device connected to a wireless modem, a wearable device, a terminal device in a future mobile communication network, or a terminal device in a future evolved public mobile land network (PLMN), etc.

[0027] In some embodiments of the present application, the electronic device may also be a device with a transceiver function, such as a chip system, wherein the chip system may include a chip and may also include other discrete devices.

[0028] Taking a mobile phone as an example, Figure 1A possible structure of an electronic device is shown. The electronic device may include a processor 110, an external memory interface 120, an internal memory 121, a universal serial bus (USB) interface (hereinafter referred to as USB interface 130), a power management module 140, a battery 141, a wireless charging coil 142, a first antenna 151, a second antenna 161, a mobile communication module 150, a wireless communication module 160, an audio module 170, a sensor module 180, a button 190, a motor 191, an indicator 192, a camera 193, a display screen 194, and a subscriber identification module (SIM) card interface (hereinafter referred to as SIM card interface 195).

[0029] Among them, the sensor module 180 may include a pressure sensor, a gyroscope sensor, an air pressure sensor, a magnetic sensor, an acceleration sensor, a distance sensor, a proximity light sensor, a fingerprint sensor, a temperature sensor, a touch sensor, an ambient light sensor, a bone conduction sensor, and the like.

[0030] It is to be understood that the structure illustrated in the embodiments of the present application does not constitute a specific limitation on the electronic device. In other embodiments of the present application, the electronic device may include more or fewer components than shown in the figure, or combine certain components, or split certain components, or arrange the components differently. The components shown in the figure may be implemented in hardware, software, or a combination of software and hardware.

[0031] The processor 110 may include one or more processing units, for example, the processor 110 may be a field programmable gate array (FPGA), an application specific integrated circuit (ASIC), a system on chip (SoC), a central processing unit (CPU), an application processor (AP), a network processor (NP), a digital signal processor (DSP), a microcontroller unit (MCU), a programmable logic device (PLD), a modem processor, a graphics processor (GPU), an image signal processor (ISP), a controller, a video codec, a baseband processor, and a neural network processing unit (NPU). Among them, different processing units may be independent devices or integrated into one or more processors 110. For example, the processor 110 may be an application processor AP. Alternatively, the processor 110 may be integrated in a system on chip (SoC). Alternatively, the processor 110 may be integrated in an integrated circuit (IC) chip. The processor 110 may include an analog front end (AFE) and a micro-controller unit (MCU) in an IC chip.

[0032] The controller can be the nerve center and command center of the electronic device. The controller can generate operation control signals according to the instruction operation code and timing signal to complete the control of fetching and executing instructions.

[0033] The processor 110 may also be provided with a memory for storing computer instructions and data. In some embodiments, the memory in the processor 110 is a cache memory. The memory may store computer instructions or data that the processor 110 has just used or circulated. If the processor 110 needs to use the computer instructions or data again, it may be directly called from the memory. This avoids repeated access, reduces the waiting time of the processor 110, and thus improves the efficiency of the system.

[0034] In some embodiments, the processor 110 may include one or more interfaces. The interface may include an inter-integrated circuit (I2C) interface, an inter-integrated circuit sound (I2S) interface, a pulse code modulation (PCM) interface, a universal asynchronous receiver / transmitter (UART) interface, a mobile industry processor interface (MIPI), a general-purpose input / output (GPIO) interface, a SIM card interface 195 and / or a USB interface 130, etc.

[0035] It is understandable that the interface connection relationship between the modules illustrated in the embodiments of the present application is only a schematic illustration and does not constitute a structural limitation on the electronic device. In other embodiments of the present application, the electronic device may also adopt different interface connection methods in the above embodiments, or a combination of multiple interface connection methods.

[0036] The wireless communication function of the electronic device can be implemented through the first antenna 151, the second antenna 161, the mobile communication module 150, the wireless communication module 160, the modem, and the baseband processor.

[0037] The first antenna 151 and the second antenna 161 are used to transmit and receive electromagnetic wave signals. Each antenna in the electronic device can be used to cover a single or multiple communication frequency bands. Different antennas can also be reused to improve the utilization of the antennas. For example, the first antenna 151 can be reused as a diversity antenna for a wireless local area network. In some other embodiments, the antenna can be used in combination with a tuning switch.

[0038] The mobile communication module 150 can provide solutions for wireless communications including 2G / 3G / 4G / 5G, etc., applied in electronic devices. The wireless communication module 160 can provide solutions for wireless communications 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., applied in electronic devices. In some embodiments, the first antenna 151 of the electronic device is coupled to the mobile communication module 150, and the second antenna 161 is coupled to the wireless communication module 160, so that the electronic device can communicate with the network and other devices through wireless communication technology.

[0039] The external memory interface 120 can be used to connect an external memory card, such as a micro SanDisk (Micro SD) card, to expand the storage capacity of the electronic device. The external memory card communicates with the processor 110 through the external memory interface 120 to implement a data storage function. For example, files such as music and videos can be stored in the external memory card.

[0040] The internal memory 121 may be used to store computer executable program codes, which include computer instructions. The processor 110 executes various functional applications and data processing of the electronic device by running the computer instructions stored in the internal memory 121. In addition, the internal memory 121 may include a high-speed random access memory, and may also include a non-volatile memory, such as at least one disk storage device, a flash memory device, a universal flash storage (UFS), etc.

[0041] The memory involved in the embodiments of the present application may be a volatile memory or a non-volatile memory, or may include both volatile and non-volatile memories. Among them, the non-volatile memory may be a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), or a flash memory. The volatile memory may be a random access memory (RAM), which is used as an external cache. By way of example but not limitation, many forms of RAM are available, such as static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double data rate SDRAM (DDR SDRAM), enhanced SDRAM (ESDRAM), synchronous link DRAM (SLDRAM), and direct RAM bus RAM (DR RAM). It should be noted that the memory of the systems and methods described herein is intended to include, but is not limited to, these and any other suitable types of memory.

[0042] The audio module 170 may include a speaker, a receiver, a microphone and an earphone interface. The electronic device may implement audio functions such as music playing and recording through the audio module 170 and the processor 110 .

[0043] The audio module 170 is used to convert digital audio information into analog audio signal output, and is also used to convert analog audio input into digital audio signals. In some embodiments, the audio module 170 can be arranged in the processor 110, or some functional modules of the audio module 170 can be arranged in the processor 110. The speaker, also known as the "speaker", is used to convert audio electrical signals into sound signals. The receiver, also known as the "earpiece", is used to convert audio electrical signals into sound signals. The microphone, also known as the "microphone" or "microphone", is used to convert sound signals into electrical signals. The electronic device can be provided with at least one microphone. The headphone jack is used to connect wired headphones. The headphone jack can be a USB interface 130, or it can be a 3.5mm open mobile terminal platform (OMTP) standard interface, or a cellular telecommunications industry association of the USA (CTIA) standard interface.

[0044] The button 190 includes a power button, a volume button, etc. The button 190 may be a mechanical button. It may also be a touch button. The electronic device may receive input from the button 190 and generate key signal input related to the user settings and function control of the electronic device. The motor 191 may generate a vibration prompt. The motor 191 may be used for incoming call vibration prompts or for touch vibration feedback. The indicator 192 may be an indicator light, which may be used to indicate the charging status, power changes, messages, missed calls, notifications, etc. The SIM card interface 195 is used to connect the SIM card. The SIM card may be inserted into the SIM card interface 195 or pulled out from the SIM card interface 195 to achieve contact and separation with the electronic device. The electronic device may support 1 or N SIM card interfaces 195, where N is a positive integer greater than 1. The SIM card interface 195 may support Nano SIM cards, Micro SIM cards, SIM cards, etc. In some embodiments, the electronic device uses an embedded SIM (eSIM) card, which may be embedded in the electronic device and cannot be separated from the electronic device.

[0045] The electronic device can realize the shooting function through the ISP, the camera 193, the video codec, the GPU, the display screen 194, and the processor 110. The ISP is used to process the data fed back by the camera 193. In some embodiments, the ISP can be set in the camera 193. The camera 193 is used to capture a static image or a video. In some embodiments, the electronic device can include 1 or N cameras 193, where N is a positive integer greater than 1.

[0046] The electronic device can realize the display function through the GPU, the display screen 194 and the processor 110. The GPU is a microprocessor for image processing, which connects the display screen 194 and the processor 110. The GPU is used to perform mathematical and geometric calculations for graphics rendering. The processor 110 may include one or more GPUs, which execute computer instructions to generate or change display information.

[0047] The display screen 194 is used to display images, videos, etc. The display screen 194 includes a display panel. In some embodiments, the electronic device may include one or more display screens 194. In other embodiments, the touch screen in the display screen 194 may be a folding screen.

[0048] The battery 141 may include at least two batteries 141 , and the at least two batteries 141 may be connected in series, in parallel, or the like to supply power to the load.

[0049] The power management module 140 is used to receive charging input from a charger. The charger may be a wireless charger, such as a wireless charging base, or other electronic devices with reverse wireless charging function. The power management module 140 may receive wireless charging input via a wireless charging coil 142 of the electronic device. The charger may also be a wired charger, for example, the power management module 140 may receive charging input from a wired charger via the USB interface 130.

[0050] The processor 110 executes the session management method provided in the embodiment of the present application by executing the program and computer instructions stored in the internal memory 121. The program run by the processor 110 can be based on an operating system, such as Android operating system®, iOS operating system®, Windows operating system®, etc.

[0051] The mobile communication module 150 and the wireless communication module 160 may include a radio frequency module. Figure 2 FIG. 2 shows a schematic diagram of the structure of a radio frequency module 200. Figure 2 As shown, the RF module 200 includes a modem 210 (modem), a RF chip 220 (radio frequency integrated circuit, RFIC), a RF front-end module 230 (radio frequency front-end, RFFE) and an antenna 240 (antenna, ANT); wherein the modem 210 is coupled to the RF chip 220, the RF chip 220 is coupled to the RF front-end module 230, and the RF front-end module 230 is coupled to the antenna 240.

[0052] like Figure 3As shown, the RF front-end module 230 may include a plurality of RF processing devices, such as a power amplifier (PA) 310, a surface acoustic wave (SAW) filter ( Figure 3 ), a low noise amplifier (LNA) 320, a duplexer 330, and an RF switch 340, etc. At the RF transmitting end and the RF receiving end of the transmitting RF chip 220, one or more RF devices (for example, a power amplifier, a low noise amplifier, or a surface acoustic wave filter) for amplifying and / or filtering the RF signal are coupled to the RF end of the RF switch 340, and the antenna 240 is coupled to the antenna end of the RF switch 340. The RF front-end module 230 includes a transmitting port TX1, receiving ports RX1 and RX2, and also includes RF ports RF1 and RF2.

[0053] In order to enable the electronic device to meet the communication requirements in various application scenarios, the above-mentioned RF module 200 may include multiple RF channels according to different working frequency bands. Figure 4 , the RF module 200 may include a first RF channel and a second RF channel. The first RF channel may include RF processing devices such as a low noise amplifier 320 and an RF switch 340, and an antenna 2402. The second RF channel may include RF processing devices such as a power amplifier 310, a duplexer 330 and an RF switch 340, and an antenna 2401. The first RF channel is used to transmit signals in the first frequency band F1, and the second RF channel is used to receive signals in the second frequency band F2. The RF front-end module 230 also includes a receiving port RX3. It should be noted that the number and frequency bands of the RF channels included in the RF module 200 can be adjusted according to actual needs, and this embodiment does not limit the specific structure of the RF module 200.

[0054] When the number of RF channels in the RF module is large, in order to meet the communication performance and structural adaptation requirements of the RF module, the layout positions of the antennas may be set very close, so the isolation between the antennas will be reduced. In such a case, the energy of the RF channel being transmitted may be coupled to the adjacent RF channel through the antenna. The adjacent RF channel may refer to a RF channel whose isolation between the antennas of the RF channel is less than the isolation threshold, generating an interference signal on the adjacent RF channel. As an example, after the signal transmitted by RF channel A is coupled to the adjacent RF channel B through the antenna, its signal strength is greater than the preset maximum interference signal strength value, then it can be determined that the isolation between the antenna of RF channel A and the antenna of RF channel B is less than the isolation threshold.

[0055] If there are nonlinear devices in adjacent RF channels, the nonlinear devices in the adjacent RF channels will be stimulated to generate harmonics, and the harmonics will be radiated along the antenna, resulting in reduced RF performance of the electronic equipment. Nonlinear devices refer to electronic components with nonlinear current-voltage relationships. For example, low-noise amplifiers include nonlinear components (such as diodes or field-effect transistors, etc.).

[0056] As an example, continue to see Figure 4 When the first RF channel and the second RF channel are adjacent RF channels, as shown by the dotted line, the fundamental signal emitted by the second RF channel is coupled to the first RF channel through the antenna 2402 and excites the nonlinear device (low noise amplifier 320). As shown by the dotted line, the low noise amplifier 320 generates harmonic radiation, and the high-order harmonics generated by the low noise amplifier 320 after being excited are conducted to the antenna 2402, generating antenna radiation.

[0057] Figure 5 A schematic diagram of a radio frequency module for suppressing interference between antennas in the related art is shown, including a first radio frequency channel and a second radio frequency channel, both of which include radio frequency front-end devices, wherein the first radio frequency channel is used to transmit and receive radio frequency signals in a first frequency band, and the second radio frequency channel is used to transmit and receive radio frequency signals in a second frequency band. In order to prevent the signal received by the first radio frequency channel from interfering with the signal reception of the second radio frequency channel, a first path and a second path are provided between the radio frequency front end and the first radio frequency channel in the first radio frequency channel, and the two paths can be switched by a switch. The first path includes a filter circuit and a notch network, and the second path is a direct-through path. When the first radio frequency channel and the second radio frequency channel are not working at the same time, the first radio frequency channel can be switched to the second path, that is, the direct-through path. Since the transmitted radio frequency signal does not have a filter circuit and a notch network, it will not cause the power attenuation of the radio frequency signal in the first frequency band. When the first radio frequency channel and the second radio frequency channel are working at the same time, the first radio frequency channel is switched to the first path to suppress the harmonics generated after the nonlinear device in the first radio frequency channel is excited, so as to reduce the interference to the second radio frequency channel. It should be noted that the radio frequency module can also include more devices, but they are not shown in the figure. Figure 5 Shown in.

[0058] In the above scheme, when the first RF channel is transmitting signals and the second RF channel is receiving signals at the same time, the RF channel where the first RF channel is located is switched to the first path provided with a filtering circuit and a notch network, which can reduce the interference of the first RF channel to the second RF channel. However, this will also cause the power attenuation of the signal transmitted by the RF channel where the first RF channel is located, affecting the communication quality. In addition, the addition of switching switches, filtering circuits, notch networks and other devices also makes the structure of the scheme complicated and the cost increased.

[0059] In order to improve the above problems, an embodiment of the present application provides a radio frequency module, including a first radio frequency channel and a second radio frequency channel, the first radio frequency channel includes a radio frequency processing device, a filtering circuit and a first antenna, the radio frequency processing device is coupled to the first antenna through the filtering circuit, the second radio frequency channel includes a second antenna, and the isolation between the first antenna and the second antenna is less than the isolation threshold, that is, the first radio frequency channel and the second radio frequency channel are adjacent radio frequency channels. There can be multiple radio frequency processing devices, and the radio frequency processor can include a nonlinear device. The filtering circuit is arranged between the nonlinear device and the first antenna.

[0060] For example, see Figure 6 , the RF module includes a first RF channel and a second RF channel. The first RF channel may include RF processing devices such as a low noise amplifier 320 and an RF switch 340 and an antenna 2402. The low noise amplifier 320 is a nonlinear device. The second RF channel may include a power amplifier 310, a duplexer 330, an RF switch 340 and other RF processing devices and an antenna 2401. A filter circuit 350 is provided between the low noise amplifier 320 and the antenna 2402. The filter circuit 350 is used to suppress the conduction of interference signals between the antenna 2402 and the low noise amplifier 320. It should be noted that the RF module also includes a RF chip 220 and a modem ( Figure 6 (not shown in the figure), the RF chip 220 and the modem can be connected in a variety of ways, and this embodiment does not limit the specific structure of the RF module.

[0061] The filtering circuit can suppress the conduction of interference signals between the first antenna and the nonlinear device from two aspects. The first aspect can be to suppress the conduction of the fundamental wave signal from the first antenna to the nonlinear device when the working frequency band of the first RF channel does not overlap with the working frequency band of the second RF channel. The working frequency band of the first RF channel can refer to the signal frequency band that matches the receiving frequency band of the first antenna when the first RF channel receives signals, and the working frequency band of the second RF channel can refer to the signal frequency band that matches the transmitting frequency band of the second antenna when the second RF channel transmits signals. The second aspect can be to suppress the conduction of harmonics from the nonlinear device to the first antenna when the working frequency band of the first RF channel overlaps with the working frequency band of the second RF channel.

[0062] In a possible implementation manner, when the operating frequency band of the first radio frequency channel does not overlap with the operating frequency band of the second radio frequency channel, the filter circuit on the first radio frequency channel may include a first filter circuit. Figure 7A first filtering circuit 351 is provided between the antenna 2402 and the low noise amplifier 320. As shown by the dotted line, the first filtering circuit 351 can be used to suppress the interference signal from being transmitted from the antenna 2402 to the low noise amplifier 320, thereby preventing the low noise amplifier 320 in the first RF channel from being excited by the interference signal transmitted by the second RF channel.

[0063] Exemplarily, the first filter circuit can be any one of a high-pass filter circuit, a low-pass filter circuit, a band-stop filter circuit, and a band-pass filter circuit. In different application scenarios, the corresponding first filter circuit can be selected according to the correspondence between the frequency bands of the signals transmitted by the first RF channel and the second RF channel.

[0064] When the maximum frequency value of the frequency band of the signal transmitted by the second RF channel is less than the minimum frequency value of the frequency band of the signal received by the first RF channel, in order to isolate the interference of the low-frequency signal on the high-frequency signal, the first filtering circuit on the first RF channel can be configured as any one of a high-pass filtering circuit, a band-pass filtering circuit or a band-stop filtering circuit, thereby preventing the interference signal generated by the RF signal transmitted by the second RF channel from entering the nonlinear device of the first RF channel, and the second RF channel does not need to adjust the transmission power, so it will not affect the normal operation of the second RF channel.

[0065] As an example, the frequency band of the signal transmitted by the second RF channel can be the B40 band, with a frequency band range of 2.3GHz to 2.39GHz and a center frequency of 2.35GHz. The frequency band of the signal received by the first RF channel can be the N77 band, with a frequency band range of 3.3GHz to 4.2GHz and a center frequency of 3.75GHz. The frequency band of the signal transmitted by the second RF channel is smaller than the frequency band of the signal received by the first RF channel. Therefore, the first filtering circuit on the first RF channel can be set to any one of a high-pass filtering circuit, a band-pass filtering circuit or a band-stop filtering circuit.

[0066] When the minimum frequency value of the frequency band of the signal transmitted by the second RF channel is greater than the maximum frequency value of the frequency band of the signal received by the first RF channel, that is, the second RF channel processes a higher frequency signal, and the first RF channel processes a lower frequency signal. In order to isolate the interference of the high frequency signal on the low frequency signal, the first filter circuit on the first RF channel can be configured as any one of a low-pass filter circuit, a band-pass filter circuit or a band-stop filter circuit.

[0067] As an example, the frequency band of the signal transmitted by the second RF channel can be the B40 band, and the frequency band of the signal received by the first RF channel can be the G1800 band. The frequency band range is 1710MHz ~ 1880MHz, and the center frequency is 1747.4MHz. The frequency band of the signal transmitted by the second RF channel is greater than the frequency band of the signal received by the first RF channel. Therefore, the first filtering circuit on the first RF channel can be set to any one of a low-pass filtering circuit, a band-pass filtering circuit, or a band-stop filtering circuit.

[0068] When the minimum frequency value of the frequency band of the signal transmitted by the second RF channel is greater than the maximum frequency value of the lower frequency band of the signal received by the first RF channel, the maximum frequency value of the frequency band of the signal transmitted by the second RF channel is less than the minimum frequency value of the higher frequency band of the signal received by the first RF channel, and there is no overlapping frequency band range, the first filter circuit on the first RF channel can be configured as any one of a bandpass filter circuit or a bandstop filter circuit.

[0069] For example, see Figure 8 The frequency band of the signal transmitted by the second RF channel can be the B40 band, with a frequency band range of 2.3GHz ~ 2.39GHz and a center frequency of 2.35GHz. The frequency band of the signal received by the first RF channel can include the G1800 band and the N77 band. The frequency band of the G1800 band is 1710MHz ~ 1880MHz, and the frequency band of the N77 band is 3.3GHz ~ 4.2GHz, with a center frequency of 3.75GHz. The frequency band of the signal transmitted by the second RF channel does not overlap with the frequency band of the signal received by the first RF channel.

[0070] The frequency band of the signal transmitted by the second RF channel is between the frequency bands of the signal received by the first RF channel, so the first filter circuit on the first RF channel can be set to be either a bandpass filter circuit or a bandstop filter circuit.

[0071] If multiple adjacent RF channels of the first RF channel will interfere with the first RF channel, and the frequency bands of the signals transmitted by the multiple adjacent RF channels do not overlap with the frequency bands of the signals received by the first RF channel, multiple filtering circuits can be set on the first RF channel, and each filtering circuit is used to filter out the interference generated by an adjacent RF channel.

[0072] The specific number and specific combination of the first filter circuit can be set according to actual needs, and the high-pass filter circuit, low-pass filter circuit, band-stop filter circuit and band-pass filter circuit can have a variety of circuit implementation methods, which are not limited in this embodiment.

[0073] For example, see Fig. 9The first filter circuit 351 shown in the figure may be a notch filter circuit, wherein the first end of the notch filter circuit is coupled to the nonlinear device, and the second end of the notch filter circuit is coupled to the antenna. The notch filter circuit includes a first end, a second end, a first capacitor C1, and a first inductor L1, wherein the first end and the second end of the notch filter circuit are both coupled to the first end of the first capacitor C1, the second end of the first capacitor C1 is coupled to the first end of the first inductor L1, and the second end of the first inductor L1 is grounded GND.

[0074] For example, see Fig.10 The first filter circuit 351 shown in the figure can also be a low-pass filter circuit, which includes a first end, a second end, a second capacitor C2, a second inductor L2 and a third inductor L3. The first end of the low-pass filter circuit is coupled to the nonlinear device, and the second end is coupled to the antenna. The low-pass filter circuit includes a second capacitor C2, a second inductor L2 and a third inductor L3. Among them, the first end of the second capacitor C2 is coupled to the first end of the second inductor L2 as the first end of the low-pass filter circuit, and the second end of the second capacitor C2 is grounded GND. The second end of the second inductor L2 is coupled to the first end of the third inductor L3 as the second end of the low-pass filter circuit, and the second end of the third inductor L3 is grounded GND.

[0075] The RF module provided in the embodiment of the present application can avoid the nonlinear device in the first RF channel from being excited and reduce the radiation of the RF module by suppressing the interference signal from entering the nonlinear device along the RF channel without changing the transmission power of the second RF channel when the frequency band of the signal received by the first RF channel does not overlap with the frequency band of the signal transmitted by the second RF channel. In addition, the structure of the first filter circuit is simple, which greatly reduces the implementation cost of the overall circuit.

[0076] The above example introduces a situation where the operating frequency band of the first RF channel does not overlap with the operating frequency band of the second RF channel. In another possible implementation, when the operating frequency band of the first RF channel overlaps with the operating frequency band of the second RF channel, the filter circuit may include a second filter circuit. The second filter circuit may be used to suppress harmonics from being transmitted from the nonlinear device to the antenna in the first RF channel.

[0077] For example, see Fig.11 A second filtering circuit 352 is provided between the antenna 2402 and the low noise amplifier 320 , as shown by the dotted line. The first filtering circuit 352 can be used to suppress harmonics from being transmitted from the low noise amplifier 320 to the antenna 2402 .

[0078] It should be noted that the overlap between the operating frequency band of the first radio frequency channel and the operating frequency band of the second radio frequency channel may include two situations: partial overlap and complete overlap.

[0079] As an example, when the maximum frequency value of the frequency band of the signal transmitted by the second RF channel is less than the maximum frequency value of the frequency band of the signal received by the first RF channel, is greater than the minimum frequency value of the frequency band of the signal received by the first RF channel, and the minimum frequency value of the frequency band of the signal transmitted by the second RF channel is less than the minimum frequency value of the frequency band of the signal received by the first RF channel, the working frequency band of the first RF channel partially overlaps with the working frequency band of the second RF channel. When the maximum frequency value of the frequency band of the signal transmitted by the first RF channel is less than the maximum frequency value of the frequency band of the signal received by the second RF channel, is greater than the minimum frequency value of the frequency band of the signal received by the second RF channel, and the minimum frequency value of the frequency band of the signal transmitted by the first RF channel is less than the minimum frequency value of the frequency band of the signal received by the second RF channel, the working frequency band of the first RF channel partially overlaps with the working frequency band of the second RF channel.

[0080] When the maximum frequency value of the frequency band of the signal transmitted by the second RF channel is less than the maximum frequency value of the frequency band of the signal received by the first RF channel, and the minimum frequency value of the frequency band of the signal transmitted by the second RF channel is greater than the minimum frequency value of the frequency band of the signal received by the first RF channel, the working frequency band of the second RF channel is completely covered by the working frequency band of the first RF channel. When the maximum frequency value of the frequency band of the signal transmitted by the second RF channel is greater than the maximum frequency value of the frequency band of the signal received by the first RF channel, and the minimum frequency value of the frequency band of the signal transmitted by the second RF channel is less than the minimum frequency value of the frequency band of the signal received by the first RF channel, the working frequency band of the first RF channel is completely covered by the working frequency band of the second RF channel.

[0081] When setting the second filtering circuit, it can be set according to the relative relationship between the frequency band of the signal received by the first RF channel and the frequency band of the harmonics generated after the nonlinear device in the first RF channel is excited. In a feasible implementation, the second filtering circuit can be any one of a high-pass filtering circuit, a low-pass filtering circuit, a band-stop filtering circuit and a band-pass filtering circuit.

[0082] When the maximum value of the frequency band of the harmonics generated after the nonlinear device in the first RF channel is excited is less than the minimum value of the frequency band of the signal received by the first RF channel, in order to isolate the interference of the low-frequency signal to the high-frequency signal, the second filter circuit on the first RF channel can be configured as any one of a high-pass filter circuit, a band-pass filter circuit or a band-stop filter circuit, thereby preventing the harmonics generated after the nonlinear device in the first RF channel is excited by the interference signal from being radiated through the antenna of the first RF channel, and will not affect the normal operation of the first RF channel.

[0083] When the minimum frequency value of the harmonic frequency band generated by the nonlinear device in the first RF channel after being excited is greater than the maximum frequency value of the frequency band of the signal received by the first RF channel. In order to isolate the interference of the low-frequency signal to the high-frequency signal, the second filter circuit on the first RF channel can be configured as any one of a low-pass filter circuit, a band-pass filter circuit or a band-stop filter circuit, thereby preventing the harmonics generated by the nonlinear device in the first RF channel after being excited by the interference signal from being radiated through the antenna of the first RF channel.

[0084] When the maximum frequency of the harmonic frequency band generated after the nonlinear device in the first RF channel is excited is less than the maximum frequency of the frequency band of the signal received by the first RF channel, and when the minimum frequency of the harmonic frequency band generated after the nonlinear device in the first RF channel is excited is greater than the minimum frequency of the frequency band of the signal received by the first RF channel. In order to isolate the interference of the low-frequency signal to the high-frequency signal, the second filter circuit on the first RF channel can be configured as any one of a band-pass filter circuit or a band-stop filter circuit, so as to prevent the harmonics generated by the nonlinear device in the first RF channel being excited by the interference signal from being radiated through the antenna of the first RF channel.

[0085] For example, see Fig.12 The frequency band of the signal transmitted by the second RF channel can be the B42 frequency band, with a frequency range of 3.4GHz ~3.6GHz and a center frequency of 3.5GHz. The frequency band of the signal received by the first RF channel can be the N77 frequency band, with a frequency range of 3.3GHz ~ 4.2GHz and a center frequency of 3.74GHz, that is, the frequency band of the signal transmitted by the second RF channel overlaps with the frequency band of the signal received by the first RF channel. The frequency band of the second harmonic generated by the nonlinear device in the first RF channel after being excited by the interference signal is 6.8GHz ~7.2GHz, and the minimum frequency value (6.8GHz) of the second harmonic frequency band is greater than the maximum frequency value (4.2GHz) of the frequency band of the signal received by the first RF channel. Therefore, the second filter circuit on the first RF channel can be set to any one of a low-pass filter circuit, a band-pass filter circuit, or a band-stop filter circuit.

[0086] If the signals transmitted by multiple adjacent RF channels will interfere with the first RF channel, and the frequency bands of the signals transmitted by the multiple adjacent RF channels overlap with the frequency bands of the signals received by the first RF channel, the influence of the signals transmitted by the adjacent RF channels on the first RF channel can be reduced by setting a corresponding second filter circuit for each adjacent RF channel. Alternatively, a corresponding second filter circuit can be set for each harmonic.

[0087] It should be noted that the implementation method of the second filtering circuit can be the same as the implementation method of the first filtering circuit, so the embodiments of the present application will not be described in detail.

[0088] The RF module provided in the embodiment of the present application, when the frequency band of the signal transmitted by the RF channel does not overlap with the frequency band of the signal transmitted by the adjacent RF channel, suppresses the conduction of harmonics in the RF channel and avoids the radiation of harmonics through the antenna, thereby further reducing the radiation of the entire RF module.

[0089] The RF signal processed by any RF channel may have a part of its frequency band overlapped with the frequency band of the signal transmitted by the adjacent RF channel, and another part of its frequency band does not overlap with the frequency band of the signal transmitted by the adjacent RF channel. Therefore, in order to achieve a better suppression effect, the conduction of interference signals and harmonics in the RF channel can be suppressed at the same time.

[0090] In one possible implementation, see Fig.13 A second filter circuit 352 and a first filter circuit 351 are provided between the antenna 2402 and the low noise amplifier 320. As shown by the dotted line, the first filter circuit 351 can be used to suppress interference signals from being transmitted from the antenna 2402 to the low noise amplifier 320. As shown by the dotted line, the second filter circuit 352 can be used to suppress harmonics from being transmitted from the low noise amplifier 320 to the antenna 2402.

[0091] When the first filter circuit and the second filter circuit are provided at the same time, the number and combination of the first filter circuit and the second filter circuit can be provided according to actual needs, and the embodiment of the present application does not limit this.

[0092] In the above embodiment, the radiation of the RF module is reduced by suppressing the conduction process of interference signals and harmonics in the RF channel. In order to achieve the purpose of better reducing radiation, the self-radiation of the nonlinear device can also be suppressed.

[0093] In a possible implementation, Fig.14 As shown, the RF module provided in the embodiment of the present application may also include a shielding cover, and the nonlinear device (low noise amplifier 320) in the first RF channel may be partially or completely disposed in the shielding cover. Thus, the harmonic radiation generated by the nonlinear device can be shielded, thereby improving the radiation stray problem of the electronic device.

[0094] The present application also provides an electronic device, comprising: a power supply and a radio frequency module, the power supply is used to supply power to the radio frequency module, and the radio frequency module includes the aforementioned radio frequency module.

[0095] In the several embodiments provided in the present application, it should be understood that the disclosed RF modules and electronic devices can be implemented in other ways. For example, the device embodiments described above are only schematic. For example, the division of the modules is only a logical function division. There may be other division methods in actual implementation, such as multiple modules or components can be combined or integrated into another device, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be an indirect coupling or communication connection through some interfaces, devices or modules, which can be electrical, mechanical or other forms.

[0096] The modules described as separate components may or may not be physically separated, and the components shown as modules may or may not be physical modules, that is, they may be located in one device or distributed on multiple devices. Some or all of the modules may be selected according to actual needs to achieve the purpose of the present embodiment.

[0097] In addition, each functional module in each embodiment of the present application may be integrated into one device, or each module may exist physically separately, or two or more modules may be integrated into one device.

[0098] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A radio frequency module, characterized in that: include: A first radio frequency channel, wherein the first radio frequency channel comprises a radio frequency processing device, a filter circuit and a first antenna, and the radio frequency processing device is coupled to the first antenna through the filter circuit; a second radio frequency channel, the second radio frequency channel comprising a second antenna; The filtering circuit is used to suppress the signal transmitted by the second antenna from being transmitted to the RF processing device when the first antenna receives the signal transmitted by the second antenna; or, when the signal transmitted by the second antenna is transmitted to the RF processing device and the signal transmitted by the second antenna is distorted to produce harmonics, suppress the harmonics from being transmitted from the RF processing device to the first antenna.

2. The radio frequency module according to claim 1, characterized in that: The radio frequency processing device is a nonlinear device.

3. The radio frequency module according to claim 1, characterized in that: The isolation between the first antenna and the second antenna is less than an isolation threshold.

4. The radio frequency module according to claim 1, characterized in that: An operating frequency band of the first radio frequency channel does not overlap with an operating frequency band of the second radio frequency channel.

5. The radio frequency module according to claim 4, characterized in that: The operating frequency band of the first radio frequency channel and the operating frequency band of the second radio frequency channel do not overlap including: a maximum frequency value of a frequency band of a signal transmitted by the second radio frequency channel is less than a minimum frequency value of a frequency band of a signal received by the first radio frequency channel; Or, a minimum frequency value of a frequency band of a signal transmitted by the second radio frequency channel is greater than a maximum frequency value of a frequency band of a signal received by the first radio frequency channel.

6. The radio frequency module according to claim 4, characterized in that: The filtering circuit includes a first filtering circuit, and the radio frequency processing device is coupled to the first antenna through the first filtering circuit; The first filtering circuit is configured to, when the first antenna receives a signal transmitted by the second antenna, suppress the signal transmitted by the second antenna from being transmitted to the radio frequency processing device.

7. The radio frequency module according to claim 1, characterized in that: An operating frequency band of the first radio frequency channel overlaps with an operating frequency band of the second radio frequency channel.

8. The radio frequency module according to claim 1, characterized in that: The overlap between the operating frequency band of the first radio frequency channel and the operating frequency band of the second radio frequency channel includes: The operating frequency band of the first radio frequency channel partially overlaps with the operating frequency band of the second radio frequency channel; Alternatively, an operating frequency band of the first radio frequency channel and an operating frequency band of the second radio frequency channel completely overlap.

9. The radio frequency module according to claim 4, characterized in that: The filtering circuit includes a second filtering circuit, and the radio frequency processing device is coupled to the first antenna through the second filtering circuit; The second filtering circuit is configured to, when a signal transmitted by the second antenna is transmitted to the RF processing device and the signal transmitted by the second antenna is distorted to generate harmonics, suppress the harmonics from being transmitted from the RF processing device to the first antenna.

10. The radio frequency module according to claim 1, characterized in that: The filtering circuit includes a first filtering circuit and a second filtering circuit, and the radio frequency processing device is coupled to the first antenna through the first filtering circuit and the second filtering circuit in sequence; The first filtering circuit is configured to, when the first antenna receives the signal transmitted by the second antenna, suppress the signal transmitted by the second antenna from being transmitted to the radio frequency processing device; The second filtering circuit is configured to, when a signal transmitted by the second antenna is transmitted to the RF processing device and the signal transmitted by the second antenna is distorted to generate harmonics, suppress the harmonics from being transmitted from the RF processing device to the first antenna.

11. The radio frequency module according to claim 1, characterized in that: The radio frequency module also includes a shielding cover, and the radio frequency processing device is arranged in the shielding cover.

12. An electronic device, characterized in that: It comprises a power supply and a radio frequency module, wherein the power supply is used to supply power to the radio frequency module; the radio frequency module comprises the radio frequency module described in any one of claims 1-11.

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