A radio frequency module and electronic device

Abstract

This application provides a radio frequency (RF) module and electronic device, relating to the field of RF technology. It aims to improve the problem of reduced RF performance of electronic devices due to antenna isolation. The RF module includes a first RF channel and a second RF channel. The first RF channel includes an RF processing device, a filtering circuit, and a first antenna. The RF processing device is coupled to the first antenna through the filtering circuit. The second RF channel includes a second antenna. The filtering circuit is used to suppress the transmission of the signal transmitted from the second antenna to the RF processing device when the first antenna receives a signal transmitted from the second antenna, or to suppress the transmission of harmonics from the RF processing device to the first antenna when the signal transmitted from the second antenna is distorted and generates harmonics.

Description

Technical Field

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

[0002] In modern communication systems, to meet the requirements of electronic equipment communication performance and antenna structure adaptation, the spacing between different antennas is relatively small, resulting in poor isolation between antennas. When antenna isolation is poor, nonlinear devices in the RF path containing an antenna may be excited by signals emitted from the RF path of an adjacent antenna, leading to excessive harmonics in the electronic equipment and consequently affecting its RF performance. Summary of the Invention

[0003] This application provides a radio frequency module and electronic device to improve the problem of reduced radio frequency performance of electronic devices due to antenna isolation.

[0004] To achieve the above objectives, the embodiments of this application adopt the following technical solutions:

[0005] In a first aspect, this application provides a radio frequency (RF) module, including a first RF channel and a second RF channel. The first RF channel includes an RF processing device, a filter circuit, and a first antenna. The RF processing device is coupled to the first antenna through the filter circuit. The second RF channel includes a second antenna. The filter circuit is used to suppress the transmission of the signal transmitted by the second antenna to the RF processing device when the first antenna receives the signal transmitted by the second antenna, or to suppress the transmission of harmonics from the RF processing device to the first antenna 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 and generates harmonics.

[0006] In the above technical solution, the influence of the signal transmitted by the second RF channel on the RF processing device in the first RF channel is reduced by the filtering circuit, so that the radiation value of the RF processing device meets the design requirements, thereby improving the impact of excessive radiation value on the RF performance of electronic equipment.

[0007] In one possible implementation of the first aspect, the radio frequency processing device is a nonlinear device.

[0008] In another possible implementation of the first aspect, the isolation between the first antenna and the second antenna is less than the isolation threshold.

[0009] In another possible implementation of the first aspect, the operating frequency band of the first radio frequency channel does not overlap with the operating frequency band of the second radio frequency channel.

[0010] In another possible implementation of the first aspect, the fact that the operating frequency band of the first radio frequency channel does not overlap with the operating frequency band of the second radio frequency channel includes: the maximum frequency of the frequency band of the signal transmitted by the second radio frequency channel is less than the minimum frequency of the frequency band of the signal received by the first radio frequency channel, or the minimum frequency of the frequency band of the signal transmitted by the second radio frequency channel is greater than the maximum frequency of the frequency band of the signal received by the first radio frequency channel.

[0011] In another possible implementation of the first aspect, the filtering circuit includes a first filtering circuit, through which the radio frequency processing device is coupled to the first antenna;

[0012] The first filtering circuit is configured 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.

[0013] In the above technical solution, when the frequency band of the signal received by the first radio frequency channel does not overlap with the frequency band of the signal transmitted by the second radio frequency channel, by suppressing the interference signal from entering the nonlinear device along the radio frequency channel, the nonlinear device in the first radio frequency channel can be prevented from being excited without changing the transmission power of the second radio frequency channel, thereby reducing the impact on the radio frequency performance of the electronic device.

[0014] In another possible implementation of the first aspect, the operating frequency band of the first radio frequency channel coincides with the operating frequency band of the second radio frequency channel.

[0015] In another possible implementation of the first aspect, the overlap of the operating frequency band of the first radio frequency channel with 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, or the operating frequency band of the first radio frequency channel and the operating frequency band of the second radio frequency channel have a complete coverage relationship.

[0016] In another possible implementation of the first aspect, the filtering circuit includes a second filtering circuit, through which the radio frequency processing device is coupled to the first antenna;

[0017] The second filter circuit is configured to suppress the transmission of harmonics from the radio frequency processing device to the first antenna when the signal transmitted by the second antenna is transmitted to the radio frequency processing device and harmonics are generated by the distortion of the signal transmitted by the second antenna.

[0018] In the above technical solution, when the frequency band of the radio frequency signal transmitted by the radio frequency channel does not overlap with the frequency band of the radio frequency signal transmitted by the adjacent radio frequency channel, the harmonics are suppressed in the radio frequency channel to prevent the harmonics from being radiated through the first antenna, thereby further reducing the impact on the radio frequency performance of the electronic device.

[0019] In another possible implementation of the first aspect, the filtering circuit includes a first filtering circuit and a second filtering circuit. The radio frequency processing device is coupled to the first antenna in sequence through the first filtering circuit and the second filtering circuit. The first filtering circuit is configured 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. The second filtering circuit is configured to suppress the transmission of harmonics from the radio frequency processing device to the first antenna 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 and generates harmonics.

[0020] In another possible implementation of the first aspect, the RF module further includes a shield, and the RF processing device is disposed within the shield.

[0021] Secondly, this application provides an electronic device, including a power supply and a radio frequency (RF) module, wherein the power supply is used to supply power to the RF module, and the RF module includes the RF module mentioned in the first aspect.

[0022] 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. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of an electronic device provided in an embodiment of this application;

[0024] Figure 2 This is a schematic diagram of the structure of a radio frequency module provided in an embodiment of this application;

[0025] Figure 3 This is a schematic diagram of another radio frequency module provided in an embodiment of this application;

[0026] Figure 4 This is a schematic diagram of another radio frequency module provided in an embodiment of this application;

[0027] Figure 5 This is a schematic diagram of the structure of a radio frequency module in the related technology provided in the embodiments of this application;

[0028] Figure 6 This is a schematic diagram of another radio frequency module provided in an embodiment of this application;

[0029] Figure 7 This is a schematic diagram of another radio frequency module provided in an embodiment of this application;

[0030] Figure 8 A schematic diagram illustrating the relationship between the operating frequency bands of a first radio frequency channel and a second radio frequency channel is provided in an embodiment of this application.

[0031] Figure 9A circuit diagram of a filter circuit provided in an embodiment of this application;

[0032] Figure 10 A circuit diagram of another filtering circuit provided in an embodiment of this application;

[0033] Figure 11 This is a schematic diagram of another radio frequency module provided in an embodiment of this application;

[0034] Figure 12 Another schematic diagram showing the relationship between the operating frequency bands of the first radio frequency channel and the second radio frequency channel provided in this application embodiment;

[0035] Figure 13 This is a schematic diagram of another radio frequency module provided in an embodiment of this application;

[0036] Figure 14 This is a schematic diagram of another radio frequency module provided in an embodiment of this application. Detailed Implementation

[0037] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0038] The terms "first" and "second" used in the embodiments of this application are only used to distinguish features of the same type and should not be construed as indicating relative importance, quantity, order, etc.

[0039] The terms "exemplary" or "for example" used in the embodiments of this application are used to indicate examples, illustrations, or descriptions. Any embodiment or design described as "exemplary" or "for example" in this application should not be construed as being more preferred or advantageous than other embodiments or designs. Specifically, the use of terms such as "exemplary" or "for example" is intended to present the relevant concepts in a specific manner.

[0040] The terms "coupling" and "connection" used in the embodiments of this application should be interpreted broadly. For example, they can refer to a physical direct connection or an indirect connection achieved through electronic devices, such as a connection achieved through resistors, inductors, capacitors or other electronic devices.

[0041] This application provides an electronic device, which can be fixed or mobile. Additionally, this electronic device may also be referred to as user equipment (UE), terminal, terminal device, mobile station (MS), mobile terminal (MT), access terminal device, vehicle-mounted terminal device, industrial control terminal device, mobile station, remote station, remote terminal device, mobile device, wireless communication device, terminal agent, or terminal apparatus, etc. For example, the electronic device may be a mobile phone, tablet, desktop computer, laptop computer, all-in-one computer, vehicle terminal, virtual reality (VR) terminal device, augmented reality (AR) terminal device, wireless terminal in industrial control, wireless terminal in self-driving, wireless terminal in remote medical surgery, wireless terminal in smart grid, wireless terminal in transportation safety, wireless terminal in smart city, wireless terminal in smart home, cellular phone, cordless phone, session initiation protocol (SIP) phone, wireless local loop (WLL) station, personal digital assistant (PDA), handheld device with wireless communication capabilities, computing device or other processing device connected to a wireless modem, wearable device, terminal device in future mobile communication networks, or terminal device in future evolved public land mobile network (PLMN), etc.

[0042] This application provides an electronic device, which can be fixed or mobile. Additionally, this electronic device may also be referred to as user equipment (UE), terminal, terminal device, mobile station (MS), mobile terminal (MT), access terminal device, vehicle-mounted terminal device, industrial control terminal device, mobile station, remote station, remote terminal device, mobile device, wireless communication device, terminal agent, or terminal apparatus, etc. For example, the electronic device may be a mobile phone, tablet, desktop computer, laptop computer, all-in-one computer, vehicle terminal, virtual reality (VR) terminal device, augmented reality (AR) terminal device, wireless terminal in industrial control, wireless terminal in self-driving, wireless terminal in remote medical surgery, wireless terminal in smart grid, wireless terminal in transportation safety, wireless terminal in smart city, wireless terminal in smart home, cellular phone, cordless phone, session initiation protocol (SIP) phone, wireless local loop (WLL) station, personal digital assistant (PDA), handheld device with wireless communication capabilities, computing device or other processing device connected to a wireless modem, wearable device, terminal device in future mobile communication networks, or terminal device in future evolved public land mobile network (PLMN), etc.

[0043] In some embodiments of this application, the electronic device may also be a transceiver device, such as a chip system. The chip system may include a chip, and may also include other discrete components.

[0044] Taking mobile phones as an example, Figure 1This diagram illustrates a possible structure for an electronic device. 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, buttons 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), etc.

[0045] The sensor module 180 may include pressure sensors, gyroscope sensors, barometric pressure sensors, magnetic sensors, accelerometers, distance sensors, proximity sensors, fingerprint sensors, temperature sensors, touch sensors, ambient light sensors, bone conduction sensors, etc.

[0046] It is understood that the structures illustrated in the embodiments of this application do not constitute a specific limitation on the electronic device. In other embodiments of this application, the electronic device may include more or fewer components than illustrated, or combine some components, or split some components, or have different component arrangements. The illustrated components may be implemented in hardware, software, or a combination of software and hardware.

[0047] Processor 110 may include one or more processing units, such as: 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 processing unit (GPU), an image signal processor (ISP), a controller, a video codec, a baseband processor, and a neural network processing unit (NPU), etc. Different processing units may be independent devices or integrated into one or more processors 110. For example, processor 110 may be an application processor (AP). Alternatively, processor 110 may be integrated into a system-on-chip (SoC). Or, processor 110 may be integrated into 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.

[0048] The controller can serve as the nerve center and command center of an electronic device. Based on the instruction opcode and timing signals, the controller generates operation control signals to control the fetching and execution of instructions.

[0049] The processor 110 may also include a memory for storing computer instructions and data. In some embodiments, the memory in the processor 110 is a cache memory. This memory can store computer instructions or data that the processor 110 has just used or that are used repeatedly. If the processor 110 needs to use the computer instructions or data again, it can retrieve them directly from the memory. This avoids repeated accesses, reduces the waiting time of the processor 110, and thus improves the efficiency of the system.

[0050] In some embodiments, the processor 110 may include one or more interfaces. Interfaces 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.

[0051] It is understood that the interface connection relationships between the modules illustrated in the embodiments of this application are merely illustrative and do not constitute a limitation on the structure of the electronic device. In other embodiments of this application, the electronic device may also employ different interface connection methods or combinations of multiple interface connection methods as described in the above embodiments.

[0052] The wireless communication function of the electronic device can be implemented through a first antenna 151, a second antenna 161, a mobile communication module 150, a wireless communication module 160, a modem, and a baseband processor.

[0053] 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 one or more communication frequency bands. Different antennas can also be multiplexed to improve antenna utilization. For example, the first antenna 151 can be multiplexed as a diversity antenna for a wireless local area network. In some other embodiments, the antennas can be used in conjunction with a tuning switch.

[0054] The mobile communication module 150 can provide wireless communication solutions, including 2G / 3G / 4G / 5G, for use in electronic devices. The wireless communication module 160 can provide wireless communication solutions, including wireless local area networks (WLANs) (such as wireless fidelity (Wi-Fi) networks), Bluetooth (BT), global navigation satellite system (GNSS), frequency modulation (FM), near field communication (NFC), and infrared (IR) technologies, for use 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, enabling the electronic device to communicate with networks and other devices via wireless communication technologies.

[0055] The external storage 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 storage interface 120 to perform data storage functions. For example, music, video, and other files can be saved on the external memory card.

[0056] Internal memory 121 can be used to store computer executable program code, which includes computer instructions. Processor 110 executes various functional applications and data processing of the electronic device by running the computer instructions stored in internal memory 121. In addition, internal memory 121 may include high-speed random access memory, and may also include non-volatile memory, such as at least one disk storage device, flash memory device, universal flash storage (UFS), etc.

[0057] The memory involved in the embodiments of this application can be volatile memory or non-volatile memory, or may include both volatile and non-volatile memory. The non-volatile memory can be read-only memory (ROM), programmable read-only memory (PROM), erasable programmable read-only memory (EPROM), electrically erasable programmable read-only memory (EEPROM), or flash memory. The volatile memory can be 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 random access memory (SRAM), dynamic random access memory (DRAM), synchronous dynamic random access memory (SDRAM), double data rate synchronous dynamic random access memory (DDR SDRAM), enhanced synchronous dynamic random access memory (ESDRAM), synchronous linked dynamic random access memory (SLDRAM), and direct rambus RAM (DR RAM). It should be noted that the memory used in the systems and methods described herein is intended to include, but is not limited to, these and any other suitable types of memory.

[0058] The audio module 170 may include a speaker, receiver, microphone, and headphone jack. Electronic devices can implement audio functions, such as music playback and recording, through the audio module 170 and processor 110.

[0059] Audio module 170 is used to convert digital audio information into analog audio signal output, and also to convert analog audio input into digital audio signal. In some embodiments, audio module 170 may be located in processor 110, or some functional modules of audio module 170 may be located in processor 110. A speaker, also called a "loudspeaker," is used to convert audio electrical signals into sound signals. A receiver, also called a "handpiece," is used to convert audio electrical signals into sound signals. A microphone, also called a "microphone," is used to convert sound signals into electrical signals. Electronic devices may be equipped with at least one microphone. A headphone jack is used to connect wired headphones. The headphone jack may be a USB interface 130, or a 3.5mm Open Mobile Terminal Platform (OMTP) standard interface, or a Cellular Telecommunications Industry Association of the USA (CTIA) standard interface.

[0060] Buttons 190 include a power button, volume buttons, etc. Buttons 190 can be mechanical buttons or touch buttons. The electronic device can receive input from buttons 190 and generate key signal inputs related to user settings and function control. Motor 191 can generate vibration alerts. Motor 191 can be used for incoming call vibration alerts or for touch vibration feedback. Indicator 192 can be an indicator light, used to indicate charging status, battery level changes, messages, missed calls, notifications, etc. SIM card interface 195 is used to connect a SIM card. The SIM card can be inserted into or removed from the SIM card interface 195 to achieve contact and separation with the electronic device. The electronic device can support one or N SIM card interfaces 195, where N is a positive integer greater than 1. SIM card interface 195 can support Nano SIM cards, Micro SIM cards, SIM cards, etc. In some embodiments, the electronic device uses an embedded SIM (eSIM) card, which can be embedded in the electronic device and cannot be separated from it.

[0061] The electronic device can perform shooting functions through an ISP, camera 193, video codec, GPU, display 194, and processor 110. The ISP is used to process 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 still images or videos. In some embodiments, the electronic device may include one or N cameras 193, where N is a positive integer greater than 1.

[0062] Electronic devices can implement display functions through GPUs, displays 194, and processors 110. A GPU is a microprocessor for image processing, connected to both the display 194 and the processor 110. The GPU performs mathematical and geometric calculations and is used for graphics rendering. The processor 110 may include one or more GPUs, which execute computer instructions to generate or modify display information.

[0063] Display screen 194 is used to display images, videos, etc. Display screen 194 includes a display panel. In some embodiments, an electronic device may include one or more displays screens 194. In other embodiments, the touch screen in display screen 194 may be a foldable screen.

[0064] Battery 141 may include at least two batteries 141, which may be connected in series, parallel or other ways to supply power to the load.

[0065] The power management module 140 receives charging input from a charger. The charger can be a wireless charger, such as a wireless charging dock or other electronic devices with reverse wireless charging capabilities. The power management module 140 can receive wireless charging input via the wireless charging coil 142 of the electronic device. Alternatively, the charger can be a wired charger; for example, the power management module 140 can receive charging input from a wired charger via a USB interface 130.

[0066] The processor 110 executes the session management method provided in this application embodiment by executing programs and computer instructions stored in the internal memory 121. The program running on the processor 110 may be based on an operating system, such as Android®, iOS®, Windows®, etc.

[0067] The mobile communication module 150 and the wireless communication module 160 may include a radio frequency module. Figure 2 A schematic diagram of the structure of an RF module 200 is shown. Figure 2 As shown, the RF module 200 includes a modem 210, an RF chip 220 (radio frequency integrated circuit, RFIC), an RF front-end module 230 (radio frequency front-end, RFFE), and an antenna 240 (antenna, ANT). 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.

[0068] like Figure 3As shown, the RF front-end module 230 may include multiple RF processing devices, such as a power amplifier (PA) 310, a surface acoustic wave (SAW) filter, etc. Figure 3 The components include (not shown in the diagram), a low noise amplifier (LNA) 320, a duplexer 330, and an RF switch 340. The RF transmitting and receiving ends of the transmitting RF chip 220 are coupled to the RF end of the RF switch 340 via one or more RF devices (e.g., power amplifiers, low noise amplifiers, or surface acoustic wave filters) for amplifying and / or filtering the RF signals. 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 RF ports RF1 and RF2.

[0069] To enable electronic devices to meet the communication needs of various application scenarios, the aforementioned RF module 200 can include multiple RF channels depending on the operating frequency band. For example, see [reference needed]. Figure 4 The radio frequency (RF) module 200 may include a first RF channel and a second RF channel. The first RF channel may include a low-noise amplifier 320, an RF switch 340, and other RF processing devices, as well as an antenna 2402. The second RF channel may include a power amplifier 310, a duplexer 330, an RF switch 340, and other RF processing devices, as well as an antenna 2401. The first RF channel is used to transmit signals in a first frequency band F1, and the second RF channel is used to receive signals in a 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. This embodiment does not limit the specific structure of the RF module 200.

[0070] When there are many radio frequency (RF) channels in an RF module, in order to meet the communication performance and structural adaptation requirements of the RF module, the antennas may be placed very close together, thus reducing the isolation between the antennas. In such cases, energy from the transmitting RF channel may couple to adjacent RF channels through the antenna. Adjacent RF channels refer to RF channels whose antenna isolation is less than an isolation threshold, generating interference signals on adjacent RF channels. As an example, if the signal transmitted by RF channel A couples to adjacent RF channel B through the antenna, and its signal strength is greater than the preset maximum interference signal strength, then it can be determined that the isolation between the antennas of RF channel A and RF channel B is less than the isolation threshold.

[0071] If nonlinear devices exist in adjacent RF channels, they will excite harmonics in those devices, which will then radiate with the antenna, degrading the RF performance of the electronic device. Nonlinear devices refer to electronic components with a nonlinear current-voltage relationship. For example, low-noise amplifiers include nonlinear components (e.g., diodes or field-effect transistors).

[0072] For further examples, please refer to [link / reference]. Figure 4 When the first and second radio frequency channels are adjacent, as shown by the dotted line, the fundamental signal emitted by the second radio frequency channel is coupled to the first radio frequency 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 higher-order harmonics generated after the low-noise amplifier 320 is excited are conducted to the antenna 2402, generating antenna radiation.

[0073] Figure 5 A schematic diagram of a radio frequency (RF) module for suppressing inter-antenna interference in related technologies is shown. It includes a first RF channel and a second RF channel, both of which include RF front-end devices. The first RF channel transmits and receives RF signals in a first frequency band, and the second RF channel transmits and receives RF signals in a second frequency band. To prevent the signal received by the first RF channel from interfering with the signal received by the second RF channel, a first path and a second path are provided between the RF front-end and the first RF channel, and these two paths can be switched via a switch. The first path includes a filter circuit and a notch network, while the second path is a straight-through path. When the first and second RF channels do not operate simultaneously, the first RF channel can switch to the second path, i.e., the straight-through path. Since the transmitted RF signal does not have a filter circuit and a notch network, it will not cause power attenuation of the RF signal in the first frequency band. When the first and second RF channels operate simultaneously, the first RF channel is switched to the first path to suppress harmonics generated after the nonlinear devices in the first RF channel are excited, thereby reducing interference to the second RF channel. It should be noted that the RF module may also include more devices, but these are not shown in the diagram. Figure 5 Shown in.

[0074] In the above scheme, when the first radio frequency channel transmits signals and the second radio frequency channel receives signals simultaneously, switching the radio frequency channel where the first radio frequency channel is located to the first path equipped with a filter circuit and a notch network can reduce the interference of the first radio frequency channel to the second radio frequency channel. However, this will also cause the power of the transmitted signal of the radio frequency channel where the first radio frequency channel is located to be attenuated, affecting the communication quality. In addition, the addition of switching switches, filter circuits, notch networks and other devices also makes the structure of the scheme complex and increases the cost.

[0075] To address the aforementioned issues, this application provides a radio frequency (RF) module, including a first RF channel and a second RF channel. The first RF channel includes an RF processing device, a filtering circuit, and a first antenna. The RF processing device is coupled to the first antenna via the filtering circuit. The second RF channel includes a second antenna, and the isolation between the first antenna and the second antenna is less than an isolation threshold, meaning the first and second RF channels are adjacent RF channels. Multiple RF processing devices can be used, and the RF processor may include nonlinear devices. The filtering circuit is disposed between the nonlinear devices and the first antenna.

[0076] For example, see Figure 6 The radio frequency (RF) module includes a first RF channel and a second RF channel. The first RF channel may include a low-noise amplifier 320, an RF switch 340, and other RF processing devices, as well as an antenna 2402. The low-noise amplifier 320 is a non-linear device. The second RF channel may include a power amplifier 310, a duplexer 330, an RF switch 340, and other RF processing devices, as well as 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 an RF chip 220 and a modem (…). Figure 6 (Not shown in the figure) The RF chip 220 and the modem can be connected in various ways. This embodiment does not limit the specific structure of the RF module.

[0077] The filtering circuit suppresses interference signals propagated between the first antenna and the nonlinear device in two ways. Firstly, when the operating frequency bands of the first and second RF channels do not overlap, it suppresses the fundamental signal propagated from the first antenna to the nonlinear device. The operating frequency band of the first RF channel can be the signal frequency band that matches the receiving frequency band of the first antenna when the first RF channel receives a signal, and the operating frequency band of the second RF channel can be the signal frequency band that matches the transmitting frequency band of the second antenna when the second RF channel transmits a signal. Secondly, when the operating frequency bands of the first and second RF channels overlap, it suppresses harmonics propagated from the nonlinear device to the first antenna.

[0078] In one possible implementation, when the operating frequency bands of the first RF channel and the second RF channel do not overlap, the filtering circuit on the first RF channel may include a first filtering circuit. (See also...) Figure 7A first filter circuit 351 is 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 the antenna 2402 to the low noise amplifier 320, thereby preventing the low noise amplifier 320 in the first radio frequency channel from being excited by the interference signals emitted by the second radio frequency channel.

[0079] For example, 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.

[0080] When the maximum frequency of the signal transmitted by the second RF channel is less than the minimum frequency 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 first 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 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.

[0081] As an example, the frequency band of the signal transmitted by the second RF channel can be the B40 band, with a frequency 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 range of 3.3GHz to 4.2GHz and a center frequency of 3.75GHz. Since 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, the first filter circuit on the first RF channel can be set as any one of a high-pass filter circuit, a band-pass filter circuit, or a band-stop filter circuit.

[0082] When the minimum frequency of the signal transmitted by the second RF channel is greater than the maximum frequency of the signal received by the first RF channel, it means that the second RF channel is processing a higher frequency signal, while the first RF channel is processing a lower frequency signal. To isolate the interference of high-frequency signals on low-frequency signals, 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.

[0083] 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, with a frequency range of 1710MHz to 1880MHz and a center frequency of 1747.4MHz. Since the frequency band of the signal transmitted by the second RF channel is greater than that of the signal received by the first RF channel, the first filter circuit on the first RF channel can be set as any one of a low-pass filter circuit, a band-pass filter circuit, or a band-stop filter circuit.

[0084] When the minimum frequency of the signal transmitted by the second RF channel is greater than the maximum frequency of the lower frequency band of the signal received by the first RF channel, and the maximum frequency of the signal transmitted by the second RF channel is less than the minimum frequency of the higher frequency band of the signal received by the first RF channel, and there are no overlapping frequency bands, the first filter circuit on the first RF channel can be configured as either a band-pass filter circuit or a band-stop filter circuit.

[0085] For example, see Figure 8 The frequency band of the signal transmitted by the second radio frequency channel can be the B40 band, with a frequency range of 2.3GHz to 2.39GHz and a center frequency of 2.35GHz. The frequency band of the signal received by the first radio frequency channel can include the G1800 band and the N77 band. The frequency range of the G1800 band is 1710MHz to 1880MHz, and the frequency range of the N77 band is 3.3GHz to 4.2GHz, with a center frequency of 3.75GHz. The frequency band of the signal transmitted by the second radio frequency channel does not overlap with the frequency band of the signal received by the first radio frequency channel.

[0086] The frequency band of the signal transmitted by the second radio frequency channel is located between the frequency bands of the signal received by the first radio frequency channel. Therefore, the first filter circuit on the first radio frequency channel can be set as either a band-pass filter circuit or a band-stop filter circuit.

[0087] If multiple adjacent radio frequency channels of the first radio frequency channel interfere with the first radio frequency channel, and the frequency bands of the signals transmitted by the multiple adjacent radio frequency channels do not overlap with the frequency bands of the signals received by the first radio frequency channel, then multiple filtering circuits can be set on the first radio frequency channel, with each filtering circuit used to filter out the interference generated by an adjacent radio frequency channel.

[0088] The specific number and combination of the first filter circuit can be set according to actual needs. High-pass filter circuit, low-pass filter circuit, band-stop filter circuit and band-pass filter circuit can all be implemented in various ways. This embodiment does not limit them.

[0089] For example, see Figure 9The first filter circuit 351 shown can be a notch filter circuit. The first terminal of the notch filter circuit is coupled to the nonlinear device, and the second terminal of the notch filter circuit is coupled to the antenna. The notch filter circuit includes a first terminal, a second terminal, a first capacitor C1, and a first inductor L1. Both the first and second terminals of the notch filter circuit are coupled to the first terminal of the first capacitor C1, and the second terminal of the first capacitor C1 is coupled to the first terminal of the first inductor L1. The second terminal of the first inductor L1 is grounded to GND.

[0090] For example, see Figure 10 The first filter circuit 351 shown can also be a low-pass filter circuit. The low-pass filter circuit includes a first terminal, a second terminal, a second capacitor C2, a second inductor L2, and a third inductor L3. The first terminal of the low-pass filter circuit is coupled to a nonlinear device, and the second terminal is coupled to an antenna. The first terminal of the second capacitor C2 is coupled to the first terminal of the second inductor L2, serving as the first terminal of the low-pass filter circuit, and the second terminal of the second capacitor C2 is grounded to GND. The second terminal of the second inductor L2 is coupled to the first terminal of the third inductor L3, serving as the second terminal of the low-pass filter circuit, and the second terminal of the third inductor L3 is grounded to GND.

[0091] The RF module provided in this application embodiment can prevent the nonlinear devices in the first RF channel from being excited 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. This reduces the radiation of the RF module. Furthermore, the structure of the first filter circuit is simple, which greatly reduces the overall circuit implementation cost.

[0092] The foregoing example illustrates the case where the operating frequency bands of the first RF channel and the second RF channel do not overlap. In another possible implementation, when the operating frequency bands of the first RF channel and the second RF channel overlap, the filtering circuit may include a second filtering circuit. The second filtering circuit can be used to suppress harmonics transmitted from nonlinear devices to the antenna in the first RF channel.

[0093] For example, see Figure 11 A second filter circuit 352 is provided between the antenna 2402 and the low-noise amplifier 320, as shown by the dashed line. The first filter circuit 352 can be used to suppress harmonics from the low-noise amplifier 320 to the antenna 2402.

[0094] 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 can include both partial overlap and complete coverage.

[0095] As an example, when the maximum frequency of the signal transmitted by the second RF channel is less than the maximum frequency of the signal received by the first RF channel, but greater than the minimum frequency of the signal received by the first RF channel, and the minimum frequency of the signal transmitted by the second RF channel is less than the minimum frequency of the signal received by the first RF channel, the operating frequency bands of the first and second RF channels partially overlap.

[0096] When the maximum frequency of the signal transmitted by the second RF channel is less than the maximum frequency of the signal received by the first RF channel, and the minimum frequency of the signal transmitted by the second RF channel is greater than the minimum frequency of the signal received by the first RF channel, the operating frequency band of the second RF channel is completely covered by the operating frequency band of the first RF channel.

[0097] When setting the second filter circuit, it can be set according to the relative relationship between the frequency band of the signal received by the first radio frequency channel and the frequency band of the harmonics generated after the nonlinear device in the first radio frequency channel is excited. In one feasible implementation, the second 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.

[0098] When the maximum frequency of the harmonics generated by the nonlinear device in the first RF channel after being excited is less than the minimum frequency of the signal received by the first RF channel, the second filter circuit on the first RF channel can be configured as a high-pass filter circuit, a band-pass filter circuit, or a band-stop filter circuit to isolate the interference of low-frequency signals to high-frequency signals. This prevents the harmonics generated by the nonlinear device in the first RF channel after being excited by interference signals from radiating through the antenna of the first RF channel without affecting the normal operation of the first RF channel.

[0099] When the minimum frequency of the harmonic band generated by the nonlinear device in the first radio frequency channel after being excited is greater than the maximum frequency of the signal band received by the first radio frequency channel, in order to isolate the interference of low-frequency signals to high-frequency signals, the second filter circuit on the first radio frequency 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 radio frequency channel after being excited by the interference signal from being radiated through the antenna of the first radio frequency channel.

[0100] When the maximum frequency of the harmonic band generated by the nonlinear device in the first RF channel after being excited is less than the maximum frequency of the signal band received by the first RF channel, and when the minimum frequency of the harmonic band generated by the nonlinear device in the first RF channel after being excited is greater than the minimum frequency of the signal band received by the first RF channel, in order to isolate the interference of low-frequency signals to high-frequency signals, the second filter circuit on the first RF channel can be configured as either 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.

[0101] For example, see Figure 12 The second radio frequency channel transmits signals in the B42 band, ranging from 3.4 GHz to 3.6 GHz, with a center frequency of 3.5 GHz. The first radio frequency channel receives signals in the N77 band, ranging from 3.3 GHz to 4.2 GHz, with a center frequency of 3.74 GHz. This means the frequency bands of the signals transmitted by the second radio frequency channel and received by the first radio frequency channel overlap. The second harmonic generated by the nonlinear device in the first radio frequency channel after being excited by the interference signal has a frequency band of 6.8 GHz to 7.2 GHz. The minimum frequency of the second harmonic band (6.8 GHz) is greater than the maximum frequency of the signal received by the first radio frequency channel (4.2 GHz). Therefore, the second filter circuit on the first radio frequency channel can be set as any one of a low-pass filter circuit, a band-pass filter circuit, or a band-stop filter circuit.

[0102] If signals emitted by multiple adjacent RF channels interfere with the first RF channel, and the frequency bands of the signals emitted by the multiple adjacent RF channels overlap with the frequency bands of the signals received by the first RF channel, then the impact of the signals emitted 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.

[0103] It should be noted that the implementation of the second filter circuit can be the same as that of the first filter circuit, so the embodiments of this application will not be described in detail.

[0104] The radio frequency module provided in this application reduces the radiation of the entire radio frequency module by suppressing the propagation of harmonics in the radio frequency channel and preventing harmonics from radiating through the antenna when the frequency band of the signal transmitted by the radio frequency channel does not overlap with the frequency band of the signal transmitted by the adjacent radio frequency channel.

[0105] In any radio frequency (RF) channel, a portion of the frequency band of the RF signal processed may overlap with the frequency band of the signal transmitted by an adjacent RF channel, while another portion may not overlap. Therefore, to achieve better suppression, interference signals and harmonics can be suppressed simultaneously during propagation in the RF channel.

[0106] In one feasible implementation, see [reference] Figure 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 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 the low-noise amplifier 320 to the antenna 2402.

[0107] When the first filter circuit and the second filter circuit are set up simultaneously, the number and combination of the first filter circuit and the second filter circuit can be set according to actual needs, and the embodiments of this application do not limit this.

[0108] In the above embodiments, the radiation of the radio frequency module is reduced by suppressing the propagation process of interference signals and harmonics in the radio frequency channel. In order to achieve a better reduction in radiation, the self-radiation of nonlinear devices can also be suppressed.

[0109] In one feasible implementation, such as Figure 14 As shown, the radio frequency module provided in this embodiment may further include a shielding cover, and the nonlinear devices (low-noise amplifier 320) in the first radio frequency channel may be partially or entirely disposed within the shielding cover. This can shield the harmonic radiation generated on the nonlinear devices and improve the radiation spurious problem of electronic equipment.

[0110] This application also provides an electronic device, including: a power supply and an RF module, wherein the power supply is used to supply power to the RF module, and the RF module includes the aforementioned RF module.

[0111] In the embodiments provided in this application, it should be understood that the disclosed radio frequency modules and electronic devices can be implemented in other ways. For example, the device embodiments described above are merely illustrative. For instance, the division of modules is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple modules or components may be combined or integrated into another device, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be through some interfaces, or indirect coupling or communication connection between devices or modules, and may be electrical, mechanical, or other forms.

[0112] The modules described as separate components may or may not be physically separate. The components shown as modules may or may not be physical modules; that is, they may be located on one device or distributed across multiple devices. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs.

[0113] In addition, the functional modules in the various embodiments of this application can be integrated into one device, or each module can exist physically separately, or two or more modules can be integrated into one device.

[0114] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A radio frequency module, characterized in that, include: A first radio frequency channel, comprising a radio frequency processing device, a filtering circuit, a first antenna, and a shielding cover, wherein the radio frequency processing device is electrically connected to the first antenna through the filtering circuit, the radio frequency processing device is a nonlinear device, and the radio frequency processing device is disposed within the shielding cover; A second radio frequency channel, the second radio frequency channel including a second antenna; The filtering circuit includes a first filtering circuit and a second filtering circuit, and the radio frequency processing device is electrically connected to the second radio frequency terminal through the first filtering circuit and the second filtering circuit. The first filtering circuit is 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. The second filtering circuit is used to suppress the transmission of harmonics from the radio frequency processing device to the first antenna 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 and generates harmonics.

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

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

4. The radio frequency module according to claim 1, characterized in that, The operating frequency bands of the first radio frequency channel and the second radio frequency channel do not overlap, including: The maximum frequency of the signal transmitted by the second radio frequency channel is less than the minimum frequency of the signal received by the first radio frequency channel. Alternatively, the minimum frequency of the signal transmitted by the second radio frequency channel is greater than the maximum frequency of the signal received by the first radio frequency channel.

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

6. The radio frequency module according to claim 1, characterized in that, The operating frequency bands of the first radio frequency channel and the second radio frequency channel overlap in the following aspects: The operating frequency band of the first radio frequency channel partially overlaps with that of the second radio frequency channel. Alternatively, the operating frequency bands of the first RF channel and the second RF channel may have a complete coverage relationship.

7. An electronic device, characterized in that, It includes a power supply and an RF module, wherein the power supply is used to supply power to the RF module; the RF module includes the RF module according to any one of claims 1-6.

Images