Radio frequency front-end module, radio frequency front-end chip and electronic device

Abstract

The present disclosure relates to the technical field of communications. Disclosed are a radio frequency front-end module, a radio frequency front-end chip and an electronic device. The radio frequency front-end module comprises: an antenna change-over switch, configured to make a switch to turn on paths of a first frequency band radio frequency signal and / or paths of a second frequency band radio frequency signal, the paths of the first frequency band radio frequency signal comprising a transmitting path and a receiving path, and the paths of the second frequency band radio frequency signal comprising a transmitting path and a receiving path; a first radio frequency isolation component, connected to the antenna change-over switch and configured to isolate the transmitting path of the first frequency band radio frequency signal and the receiving paths of the first frequency band radio frequency signal and the second frequency band radio frequency signal; and a second radio frequency isolation component, connected to the antenna change-over switch and configured to isolate the transmitting path of the second frequency band radio frequency signal and the receiving paths of the first frequency band radio frequency signal and the second frequency band radio frequency signal. The solution of the present application can reduce losses in radio frequency paths, and improve network transmission efficiency.

Description

RF front-end modules, RF front-end chips and electronic equipment

[0001] This application claims priority to the Chinese patent application filed with the State Intellectual Property Office on November 13, 2023, with application number 202311514996.3 and application name “RF front-end module, RF front-end chip and electronic device”, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The present application relates to the field of communication technology, and in particular to a radio frequency front-end module, a radio frequency front-end chip, and an electronic device. Background Art

[0003] With the development of mobile communication technology, users have increasingly higher requirements for network transmission efficiency. For example, when a primary mobile communication network becomes widely used, a secondary mobile communication network is often developed, forming a dual connectivity technology with the primary mobile communication network as the primary and the secondary mobile communication network as the secondary, allowing major operators to gradually transition to the secondary mobile communication network.

[0004] To meet the dual connectivity requirements of regional operators, current RF front-end modules in terminal products typically use a main module and a diversity module to form two RF paths to transmit and receive RF signals in two frequency bands. However, the numerous electronic components and wiring passing through these two RF paths results in significant losses, impacting network transmission efficiency.

[0005] Therefore, how to reduce the loss in the RF path and improve network transmission efficiency has become an urgent problem that needs to be solved.

[0006] Summary of the Invention

[0007] The present application provides a radio frequency front-end module, a radio frequency front-end chip, and an electronic device, which can reduce the loss in the radio frequency path and improve the network transmission efficiency.

[0008] To achieve the above objectives, this application adopts the following technical solutions:

[0009] In a first aspect, a radio frequency front-end module is provided, including: an antenna switching switch, configured to switch the path of a first frequency band radio frequency signal and / or the path of a second frequency band radio frequency signal on or off; the path of the first frequency band radio frequency signal includes a transmitting path and a receiving path, and the path of the second frequency band radio frequency signal includes a transmitting path and a receiving path; an radio frequency isolation component, connected to the antenna switching switch, configured to isolate the transmitting path of the first frequency band radio frequency signal, and the receiving path of the first frequency band radio frequency signal and the second frequency band radio frequency signal; and / or a second radio frequency isolation component, connected to the antenna switching switch, configured to isolate the transmitting path of the second frequency band radio frequency signal, and the receiving path of the first frequency band radio frequency signal and the second frequency band radio frequency signal; the first frequency band radio frequency signal is different from the second frequency band radio frequency signal.

[0010] In an embodiment of the present application, the path of the first-band RF signal and the path of the second-band RF signal are both directly connected to the antenna switching switch, so that the first-band RF signal only passes through the antenna switching switch between the first RF isolation component and the antenna subsystem, and the second-band RF signal only passes through the antenna switching switch between the second RF isolation component and the antenna subsystem, completing the transmission and reception process of the two-band RF signals. The RF signal passes through fewer electronic devices and wirings, and the loss is lower, which effectively improves the network transmission efficiency.

[0011] With reference to the first aspect, in certain implementations of the first aspect, the first-frequency-band radio frequency signal and the second-frequency-band radio frequency signal are both in a low-frequency band.

[0012] In this implementation, the first frequency band radio frequency signal and the second frequency band radio frequency signal are both low frequency bands, so that the circuit structure of the radio frequency front-end module of the present application is suitable for a dual connection structure of a low frequency band.

[0013] In combination with the first aspect, in certain implementations of the first aspect, one of the first frequency band radio frequency signal and the second frequency band radio frequency signal is a 4G signal, and the other is a 5G signal.

[0014] In this implementation, the first frequency band radio frequency signal and the second frequency band radio frequency signal are 4G signals and 5G signals respectively, so that the radio frequency front-end module of the present application is suitable for the dual connection structure of 4G and 5G.

[0015] In combination with the first aspect, in some implementations of the first aspect, the RF front-end module further includes a main set module, and the antenna switching switch is arranged inside the main set module.

[0016] In an embodiment of the present application, the antenna switching switch is disposed within the main module, while the first RF isolation component and the second RF isolation component are both disposed outside the main module. This allows the antenna switching switch to be integrated with other electronic components within the main module, reducing the area occupied by the antenna switching switch within the RF front-end module. Furthermore, the first-band RF signal passes only through the antenna switching switch between the first RF isolation component and the antenna subsystem, and the second-band RF signal passes only through the antenna switching switch between the second RF isolation component and the antenna subsystem, completing the transmission and reception of RF signals in both frequency bands. The RF signal passes through fewer electronic components and wiring, resulting in lower losses and effectively improving network transmission efficiency.

[0017] In combination with the first aspect, in some implementations of the first aspect, the RF front-end module further includes a main set module, and the antenna switching switch is arranged outside the main set module.

[0018] In this embodiment of the present application, the antenna switching switch, the first RF isolation component, and the second RF isolation component are all located outside the main module, thereby separating the antenna switching switch from the main module and facilitating future updates and maintenance. Furthermore, the first-band RF signal passes only through the antenna switching switch between the first RF isolation component and the antenna subsystem, and the second-band RF signal passes only through the antenna switching switch between the second RF isolation component and the antenna subsystem, completing the transmission and reception of RF signals in both frequency bands. This reduces the number of electronic components and wiring through which RF signals pass, resulting in lower losses and effectively improving network transmission efficiency.

[0019] In combination with the first aspect, in some implementations of the first aspect, the first RF isolation component and the second RF isolation component are disposed inside or outside the main assembly module.

[0020] In the embodiments of the present application, the first RF isolation component and the second RF isolation component can be disposed inside or outside the main module as required, without affecting the transmission of RF signals. Furthermore, for circuit integration or layout purposes, one of the first RF isolation component and the second RF isolation component can be disposed inside the main module, while the other can be disposed outside the main module, or both can be disposed inside and outside the main module.

[0021] In combination with the first aspect, in certain implementations of the first aspect, the antenna switching switch includes a single-pole n-throw switch, n≥4, and n is an integer; two moving contacts of the double-pole n-throw switch are respectively connected to the first RF isolation component and the second RF isolation component, and one fixed contact of the double-pole n-throw switch is connected to the first antenna.

[0022] In this implementation, the antenna switching switch uses a single-pole n-throw switch, so that the antenna switching switch only switches the path between the first antenna and the first RF isolation component or the second RF isolation component on or off, while not affecting other single-band RF paths in the RF front-end module.

[0023] In combination with the first aspect, in certain implementations of the first aspect, the antenna switching switch includes a double-pole n-throw switch, n≥4, and n is an integer; two moving contacts of the double-pole n-throw switch are respectively connected to the first RF isolation component and the second RF isolation component, and two fixed contacts of the double-pole n-throw switch are respectively connected to the first antenna and the second antenna.

[0024] In this implementation, the antenna switching switch uses a double-pole n-throw switch, so that the antenna switching switch switches the path between the first antenna and the second antenna and the first RF isolation component and the second RF isolation component to be conductive or disconnected, while not affecting the single-band RF path in the RF front-end module.

[0025] In combination with the first aspect, in certain implementations of the first aspect, the first RF isolation component includes a first duplexer; the antenna end of the first duplexer is connected to the antenna switching switch, the transmitting path of the first duplexer conducts the transmitting signal of the first frequency band RF signal, and the receiving path of the first duplexer conducts the receiving signals of the first frequency band RF signal and the second frequency band RF signal.

[0026] In this implementation, the first RF isolation component uses a first duplexer to conduct the transmission path of the first frequency band RF signal and the receiving path of the first frequency band RF signal and the second frequency band RF signal, thereby realizing the transmission process of the first frequency band RF signal and the reception process of the first frequency band RF signal and the second frequency band RF signal.

[0027] In combination with the first aspect, in certain implementations of the first aspect, the second RF isolation component includes a second duplexer; the antenna end of the second duplexer is connected to the antenna switching switch, the transmitting path of the second duplexer conducts the transmitting signal of the second frequency band RF signal, and the receiving path of the second duplexer conducts the receiving signals of the first frequency band RF signal and the second frequency band RF signal.

[0028] In this implementation, the second RF isolation component uses a second duplexer to conduct the transmission path of the second frequency band RF signal and the receiving path of the first frequency band RF signal and the second frequency band RF signal, thereby realizing the transmission process of the second frequency band RF signal and the reception process of the first frequency band RF signal and the second frequency band RF signal.

[0029] In combination with the first aspect, in certain implementations of the first aspect, the RF front-end module also includes: a first antenna selection switch, arranged inside the main set module, connected to the antenna switching switch, and configured to select and turn on the receiving path of the first frequency band RF signal and / or the receiving path of the second frequency band RF signal; a third duplexer, arranged inside the main set module, connected to the first antenna selection switch, and configured to turn on the receiving signal of the first frequency band RF signal; a fourth duplexer, arranged inside the main set module, connected to the first antenna selection switch, and configured to turn on the receiving signal of the second frequency band RF signal.

[0030] In this implementation, the first antenna selection switch is used to select and turn on the receiving path of the first frequency band RF signal and / or the receiving path of the second frequency band RF signal, the third duplexer is used to turn on the receiving signal of the first frequency band RF signal, and the fourth duplexer is used to turn on the receiving signal of the second frequency band RF signal, thereby realizing a single frequency band receiving path for the first frequency band RF signal or the second frequency band RF signal.

[0031] In combination with the first aspect, in certain implementations of the first aspect, the RF front-end module also includes: a first RF switch, arranged inside the main set module, connected to the third duplexer and the first RF isolation component respectively, and configured to conduct the receiving path of the first frequency band RF signal, or the receiving path of the first frequency band RF signal and the second frequency band RF signal; a second RF switch, arranged inside the main set module, connected to the fourth duplexer and the second RF isolation component respectively, and configured to conduct the receiving path of the second frequency band RF signal, or the receiving path of the first frequency band RF signal and the second frequency band RF signal.

[0032] In this implementation, the first RF switch is used to conduct the reception signal of the first-band RF signal of a single band or the reception signal of the first-band RF signal and the second-band RF signal of a dual-band, and the second RF switch is used to conduct the reception signal of the second-band RF signal of a single band or the reception signal of the first-band RF signal and the second-band RF signal of a dual-band.

[0033] In combination with the first aspect, in certain implementations of the first aspect, the RF front-end module also includes: a first low-noise amplifier, arranged inside the main set module, connected to the first RF switch, and configured to amplify the received signal of the first frequency band RF signal or the received signal of the second frequency band RF signal; a second low-noise amplifier, arranged inside the main set module, connected to the second RF switch, and configured to amplify the received signal of the first frequency band RF signal or the received signal of the second frequency band RF signal.

[0034] In this implementation, the first low-noise amplifier and the second low-noise amplifier respectively perform low-noise amplification on the received signal of the first frequency band radio frequency signal or the received signal of the second frequency band radio frequency signal.

[0035] In combination with the first aspect, in certain implementations of the first aspect, the RF front-end module also includes a diversity module, which is connected to the main set module and is configured to assist in receiving the reception signal of the first frequency band RF signal or the reception signal of the second frequency band RF signal.

[0036] In this implementation, when the main set module fails or the received signal is weak, the diversity module is used to receive the received signal of the first frequency band RF signal or the received signal of the second frequency band RF signal to improve the stability of the received signal of the RF front-end module.

[0037] In combination with the first aspect, in certain implementations of the first aspect, the diversity module includes: a second antenna selection switch, connected to the antenna switching switch, and configured to select and conduct the receiving path of the first frequency band RF signal or the receiving path of the second frequency band RF signal; a filter, connected to the second antenna selection switch, and configured to filter the received signal of the first frequency band RF signal or the received signal of the second frequency band RF signal.

[0038] In this implementation, the second antenna selection switch is used to select and conduct the receiving path of the first frequency band radio frequency signal or the receiving path of the second frequency band radio frequency signal, and the filter is used to filter the received signal of the first frequency band radio frequency signal or the received signal of the second frequency band radio frequency signal selected by the second antenna selection switch.

[0039] In combination with the first aspect, in some implementations of the first aspect, the diversity module further includes: a third RF switch, connected to the filter, and configured to conduct the receiving path of the first frequency band RF signal or the second frequency band RF signal.

[0040] In this implementation, the third radio frequency switch is used to selectively conduct the reception signal of the single-band first-band radio frequency signal or the reception signal of the single-band second-band radio frequency signal.

[0041] In this implementation, the diversity module further includes: a third low-noise amplifier connected to the third RF switch, configured to amplify the received signal of the first frequency band RF signal or the received signal of the second frequency band RF signal.

[0042] In this implementation, the third low-noise amplifier performs low-noise amplification on the received signal of the first-frequency-band radio frequency signal or the received signal of the second-frequency-band radio frequency signal.

[0043] In a second aspect, a radio frequency front-end chip is provided, comprising the radio frequency front-end module.

[0044] In an embodiment of the present application, the RF front-end module is integrated into the RF front-end chip, and the transmission process and the reception process of the first-band RF signal and the second-band RF signal are controlled by the antenna switching switch, so that the first-band RF signal only passes through the antenna switching switch between the first RF isolation component and the antenna subsystem, and the second-band RF signal only passes through the antenna switching switch between the second RF isolation component and the antenna subsystem, completing the transmission and reception process of the two-band RF signals. The RF signal passes through fewer electronic devices and wirings, and the loss is low, which effectively improves the network transmission efficiency.

[0045] According to a third aspect, an electronic device is provided, comprising the RF front-end chip and the RF transceiver chip, which are connected to the RF front-end module and configured to send a control signal to the antenna switching switch to control the conduction or disconnection of the path of the first frequency band RF signal and the path of the second frequency band RF signal; an antenna subsystem, which is connected to the RF front-end module and configured to receive and / or send the first frequency band RF signal and the second frequency band RF signal.

[0046] In an embodiment of the present application, the conduction path of the RF front-end module is controlled by the RF transceiver chip, and the first-band RF signal and the second-band RF signal are received or sent through the antenna subsystem, so that the first-band RF signal only passes through the antenna switching switch between the first RF isolation component and the antenna subsystem, and the second-band RF signal only passes through the antenna switching switch between the second RF isolation component and the antenna subsystem, completing the transmission and reception process of the two-band RF signals. The RF signal passes through fewer electronic devices and wirings, and the loss is low, which effectively improves the network transmission efficiency.

[0047] In combination with the third aspect, in certain implementations of the third aspect, the antenna subsystem includes: a first antenna, connected to the antenna switching switch, configured to receive or send the first frequency band RF signal and the second frequency band RF signal; a second antenna, connected to the antenna switching switch, configured to receive or send the first frequency band RF signal and the second frequency band RF signal.

[0048] In this implementation, a first antenna and a second antenna are used to transmit and receive radio frequency signals in a first frequency band and radio frequency signals in a second frequency band, and the specific receiving path and transmitting path are controlled by an antenna switching switch. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] FIG1 is a schematic diagram of a scenario of a mobile communication system to which an embodiment of the present application is applicable;

[0050] FIG2 is a schematic diagram of the structure of an electronic device provided in an embodiment of the present application;

[0051] FIG3 is a schematic structural diagram of a radio frequency front-end module provided in an embodiment of the present application;

[0052] FIG4 is a schematic structural diagram of a radio frequency front-end module provided in an embodiment of the present application;

[0053] FIG5 is a circuit diagram of a radio frequency front-end module provided in an embodiment of the present application;

[0054] FIG6 is a signal trend diagram of a radio frequency front-end module provided in an embodiment of the present application;

[0055] FIG7 is a schematic structural diagram of a radio frequency front-end module provided in another embodiment of the present application;

[0056] FIG8 is a schematic structural diagram of a radio frequency front-end module provided in another embodiment of the present application;

[0057] FIG9 is a schematic structural diagram of a radio frequency front-end module provided in another embodiment of the present application;

[0058] FIG10 is a schematic structural diagram of a radio frequency front-end module provided in another embodiment of the present application;

[0059] FIG11 is a schematic structural diagram of a radio frequency front-end module provided in another embodiment of the present application;

[0060] FIG12 is a schematic structural diagram of a radio frequency front-end module provided in another embodiment of the present application;

[0061] FIG13 is a schematic structural diagram of a radio frequency front-end module provided in another embodiment of the present application;

[0062] FIG14 is a circuit diagram of a radio frequency front-end module according to another embodiment of the present application;

[0063] FIG15 is a signal trend diagram of a radio frequency front-end module provided in another embodiment of the present application. DETAILED DESCRIPTION

[0064] The following is a clear and detailed description of the technical solutions in the embodiments of the present application, with reference to the accompanying drawings. In the description of the embodiments of the present application, unless otherwise specified, " / " represents the meaning of "or." For example, A / B can represent A or B. "and / or" in the text is merely a description of the association relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone.

[0065] The terms "first," "second," and the like are used for descriptive purposes only and should not be construed as suggesting or implying relative importance or implicitly designating the number of the technical features indicated. Thus, features defined as "first" or "second" may explicitly or implicitly include one or more of such features. In the description of the embodiments of this application, unless otherwise specified, "plurality" means two or more.

[0066] In order to facilitate the understanding of the embodiments of the present application, the relevant concepts involved in the embodiments of the present application are first briefly described.

[0067] 1. Long Term Evolution (LTE)

[0068] LTE is the long-term evolution of the Universal Mobile Telecommunications System (UMTS) technology standard developed by the 3rd Generation Partnership Project (3GPP) and is widely used in 4G networks.

[0069] 2. New Radio (NR)

[0070] In the field of communications, NR refers to the global 5G standard based on a new air interface design based on orthogonal frequency division multiplexing (OFDM).

[0071] 3. E-UTRAN New Radio – Dual Connectivity (ENDC)

[0072] In the communications field, ENDC refers to a dual-connectivity technology that uses 4G as the core network, 4G base stations as the primary network, and 5G base stations as the secondary network. In ENDC technology, all signaling is transmitted through the LTE network, while data can be transmitted through both the LTE network and the NR network.

[0073] 4. Radio frequency front end (RFFE)

[0074] In the field of communications, the RF front-end refers to a series of components between the RF transceiver and the antenna, mainly including the power amplifier (PA), antenna switch (Switch), filter (Filter), duplexer (Duplexer and Diplexer) and low-noise amplifier (LNA), which directly affect the signal transmission and reception of mobile phones.

[0075] 5. Transmit (TX)

[0076] In the field of communications, transmission refers to the act of sending data from one device to another device or a group of devices.

[0077] 6. Receive (RX)

[0078] In the field of communications, reception refers to the process of converting transmitted signals into perceptible information.

[0079] 7. Bx and Nx

[0080] B represents the beginning of the LTE band number, N represents the beginning of the NR band number, and x represents the band number. Bx represents the frequency band corresponding to LTE band number x, and Nx represents the frequency band corresponding to NR band number x. For example, B20 represents the frequency band corresponding to LTE band number 20. The uplink frequency range of B20 is 832MHz to 862MHz, and the downlink frequency range of B20 is 791MHz to 821MHz. N28 represents the frequency band corresponding to NR band number 28. The uplink frequency range of N28 is 703MHz to 748MHz, and the downlink frequency range of B20 is 758MHz to 803MHz. B28 represents the frequency band corresponding to LTE band number 28. The uplink frequency range of B28 is 703MHz to 748MHz, and the downlink frequency range of B28 is 758MHz to 803MHz.

[0081] 8. LB, MB, HB

[0082] LB refers to low frequency band (LB); MB refers to middle frequency band (MB); HB refers to high frequency band (HB); and MHB refers to middle and high frequency band (MHB). It should be understood that low frequency, middle frequency, middle and high frequency, and high frequency refer to relative high and low frequencies, and their frequency band divisions can be adjusted as needed. Middle and high frequency include middle and high frequencies.

[0083] 9. Duplexer (DUP)

[0084] In the field of communications, a duplexer refers to a dual-channel filter that is used to isolate the transmit signal from the receive signal to ensure that both the receive and transmit signals can operate normally at the same time.

[0085] 10. Low noise amplifier (LNA)

[0086] In the field of communications, a low-noise amplifier refers to an amplifier with a very low noise figure, which is used as a high-frequency or intermediate-frequency preamplifier for various radio receivers, as well as an amplifying circuit for highly sensitive electronic detection equipment.

[0087] 11. Surface acoustic wave (SAW) filters

[0088] In the communications field, a surface acoustic wave filter (SAF) is a filter that uses surface acoustic waves to filter noise. It uses input and output transducers to convert radio wave input signals into mechanical energy. After processing, the mechanical energy is converted back into electrical signals to filter out unnecessary signals and noise.

[0089] The above is a brief introduction to the nouns involved in the embodiments of this application, and no further details will be given below.

[0090] FIG1 is a schematic diagram of a scenario of a mobile communication system to which an embodiment of the present application is applicable.

[0091] As shown in Figure 1, the electronic device 100 in the mobile communication system can simultaneously transmit and receive with network devices of multiple standards. For example, the mobile communication system may include the electronic device 100, an LTE base station 200, and an NR base station 300. The electronic device 100 can communicate with the LTE base station 200 and the NR base station 300 simultaneously. Among them, the LTE base station 200 and the NR base station 300 are network devices of two different standards.

[0092] The embodiments of the present application do not specifically limit the type of electronic device 100. In some embodiments, the electronic device 100 can be a mobile phone, a wearable device (such as a smart bracelet, smart watch, headphones, etc.), a tablet computer, a laptop computer, a handheld computer, a notebook computer, an ultra-mobile personal computer (UMPC), a cellular phone, a personal digital assistant (PDA), an augmented reality (AR) or virtual reality (VR) device, and other IOT (Internet of Things) devices. It can also be a television, a large screen, a printer, a projector, and other devices. For ease of understanding, the following embodiments are illustrative examples using the electronic device 100 as a mobile phone.

[0093] FIG2 is a schematic diagram of the structure of an electronic device provided in an embodiment of the present application.

[0094] As shown in Figure 2, the electronic device 100 may include a baseband subsystem 10, a radio frequency subsystem 20 consisting of a radio frequency integrated circuit (RFIC) 21 and a radio frequency front end (RFFE) 22, an antenna (ANT) subsystem 30, a power subsystem 40, etc. These devices can be coupled through various interconnection buses or other electrical connection methods.

[0095] The baseband subsystem 10 can extract useful information or data bits from the baseband signal, or convert the information or data bits into a baseband signal to be sent. These information or data bits can be data representing user data such as voice, text, video, or control information. Exemplarily, the baseband subsystem 10 can implement signal processing operations such as modulation and demodulation, encoding and decoding. Different baseband signal processing operations can be provided for different wireless access technologies, such as 5G NR and 4G LTE. Therefore, in order to support multiple mobile communication modes, the baseband subsystem 10 can simultaneously include multiple processing cores or multiple hardware accelerators (HAC). The baseband subsystem 10 can be integrated into one or more chips.

[0096] For example, the baseband subsystem 10 can be an independent chip, which can be called a modem chip. The hardware components of the baseband subsystem 10 can be manufactured and sold in units of modem chips. Modem chips can also be called baseband chips or baseband processors. In addition, the baseband subsystem 10 can also be further integrated into a system on chip (SOC) chip and manufactured and sold in units of SOC chips. The software components of the baseband subsystem 10 can be built into the hardware components of the chip before the chip leaves the factory, or can be imported from other non-volatile memories into the hardware components of the chip after the chip leaves the factory, or these software components can be downloaded and updated online via the network.

[0097] In addition, since the RF signal is an analog signal, the signals processed by the baseband subsystem 10 are mainly digital signals, and the electronic device also needs an analog-to-digital converter. The analog-to-digital converter can include an analog-to-digital converter (ADC) that converts an analog signal into a digital signal, and a digital-to-analog converter (DAC) that converts a digital signal into an analog signal. It should be understood that the analog-to-digital converter and the digital-to-analog converter can be set in the baseband subsystem 10 or in the RF subsystem 20, and the embodiments of the present application do not impose any restrictions on this.

[0098] The RF subsystem 20 can be divided into an RF receive path and an RF transmit path. The RF receive path can receive RF signals through an antenna, process the RF signals, such as amplification, filtering, down-conversion and analog-to-digital conversion, to obtain baseband signals, and transmit them to the baseband subsystem 10. The RF transmit path can receive baseband signals from the baseband subsystem 10, process the baseband signals, such as up-conversion, amplification, filtering and digital-to-analog conversion, to obtain RF signals, and radiate the RF signals into space through an antenna. Specifically, the RF subsystem 20 may include electronic components such as RF switches, duplexers, antenna tuners, low noise amplifiers (LNAs), power amplifiers, mixers, local oscillators (LOs), filters, etc. These electronic components can be integrated into one or more chips as needed. The antenna can sometimes also be considered as part of the RF subsystem 20.

[0099] For example, the aforementioned electronic components can be separately installed in the antenna, RF front-end module 22, and RF transceiver chip 21 as needed. The RF transceiver chip 21 can be composed of components such as a mixer and a local oscillator. The local oscillator is used to provide a local oscillator signal; the mixer is used to mix the RF signal with the local oscillator signal provided by the local oscillator. The RF transceiver chip 21 can also be referred to as a receiver, transmitter, or transceiver.

[0100] The RF front-end module 22 can be composed of electronic components such as filters, low-noise amplifiers, power amplifiers, and RF switches. The RF switch is used to switch between RF signal reception and transmission, and between different frequency bands. The duplexer isolates the transmit and receive paths of the RF signal, ensuring that both receive and transmit functions function properly while sharing the same antenna. The filter retains signals within a specific frequency band while filtering out signals outside of that band. The low-noise amplifier amplifies the RF signal in the receive channel, and the power amplifier amplifies the RF signal in the transmit channel.

[0101] Here, the RF transceiver chip 21 can output control signals to components such as the RF switch in the RF front-end module 22 through the control line to control the RF switch to switch different links.

[0102] In the embodiment of the present application, the radio frequency switch may include an antenna switching switch, and may also include a first antenna selection switch, a second antenna selection switch, etc.

[0103] It should be understood that the above is only an example, and the RF subsystem 20 may also include other devices or adopt other integration methods. For example, some devices belonging to the RF front-end module 22 may be integrated into the RF transceiver chip 21, or the antenna and the RF front-end module 22 may be integrated into the RF transceiver chip 21. The specific settings and modifications can be made as needed, and the embodiments of the present application do not impose any restrictions on this.

[0104] The antenna subsystem 30 includes multiple antennas, where ANT1 represents the first antenna, ANTn represents the nth antenna, and n is a positive integer greater than 1. The antenna subsystem 30 may also include an antenna switch for switching to different antennas so that different signals are transmitted using different antennas.

[0105] The power subsystem 40 is used to power various components. For example, the power supply can provide voltage for a power amplifier. The power subsystem 40 may include multiple power supplies, which may be the same or different. The power subsystem 40 may also power the baseband subsystem 10, the radio frequency subsystem 20, and the antenna subsystem 30. Each subsystem may be powered by the same power supply or by different power supplies.

[0106] In addition, the electronic device 100 may also include an application subsystem, which can serve as the main control system or main computing system of the electronic device 100, for running the main operating system and application programs, managing the software and hardware resources of the entire electronic device 100, and providing a user interface for the user. The application subsystem may include one or more processing cores. In addition, the application subsystem may also include driver software related to other subsystems (such as the baseband subsystem 10). The baseband subsystem 10 may also include one or more processing cores, as well as hardware accelerators and caches.

[0107] It should be understood that the above is only an example of the structure of the electronic device 100. The electronic device 100 may also include other subsystems or devices, which can be specifically configured and modified as needed. The embodiments of the present application do not impose any restrictions on this.

[0108] At present, 5G with higher transmission efficiency is widely used, and 5G networking modes include standalone (SA) mode and non-standalone (NSA) mode. Among them, the NSA mode introduces dual connection (DC) technology to support the electronic device 100 to communicate with the 4G base station and the 5G base station at the same time. According to the different roles played by the two base stations, the 4G base station and the 5G base station, the DC architecture under the NSA mode can be divided into ENDC, NR-EUTRA Dual Connection (NEDC), and NG-RAN E-UTRA-NR Dual Connection (NG-RAN E-UTRA-NR Dual-Connectivity, NGEN-DC) three architectures. Among them, NEDC refers to a dual connection technology with 5G as the core network, 5G base stations as the main, and 4G base stations as the auxiliary. NGEN-DC refers to a dual connection technology with 5G as the core network, 4G base stations as the main, and 5G base stations as the auxiliary. For example, in an embodiment provided in the present application, a 4G signal and a 5G signal may be used to constitute two radio frequency signals of different frequency bands in an ENDC scenario.

[0109] FIG3 is a schematic structural diagram of a radio frequency front-end module provided in an embodiment of the present application.

[0110] In one embodiment provided in the present application, an example is taken in which the electronic device 100 supports the LB1+LB2 ENDC architecture in NSA mode. As shown in FIG3 , the signals transmitted between the RF transceiver chip 21 and the RF front-end module 22 may include: an LB1 transmit signal, an LB1 receive signal, an LB2 transmit signal, and an LB2 receive signal. The LB1 transmit signal refers to a transmit signal whose frequency is in the frequency band corresponding to LB, and the LB1 receive signal refers to a receive signal whose frequency is in the frequency band corresponding to LB; the LB2 transmit signal refers to another transmit signal whose frequency is in the frequency band corresponding to LB, and the LB1 receive signal refers to another receive signal whose frequency is in the frequency band corresponding to LB. The LB1 signal and the LB2 signal are in different low-frequency bands. For example, an n28+B20 ENDC architecture, or a B28+n20 ENDC architecture, etc. The RF transceiver chip 21 is connected to the first antenna ANT1 and the second antenna ANT2 for transmitting the LB1 transmit signal and the LB2 transmit signal, and receiving the LB1 receive signal and the LB2 receive signal, etc.

[0111] In one embodiment of the present application, the RF front-end module of the ENDC architecture of LB1+LB2 in NSA mode generally includes a main module and a diversity module, and the path between the external antenna and the first frequency band isolation component is connected through the antenna switching switch and the antenna selection switch in the main module, wherein the first frequency band isolation component can be a first duplexer for isolating the transmission signal of the LB1 signal and the reception signal of the LB1 signal and the LB2 signal. Therefore, the antenna switching switch and the antenna selection switch in the main module will cause high losses in the transmission process of the RF signal of the LB1 frequency band and the reception process of the RF signals of the LB1 frequency band and the LB2 frequency band.

[0112] At the same time, a path between the external antenna and the second frequency band isolation component is established through the antenna switching switch in the main module, the wire between the main module and the diversity module, and the antenna selection switch in the diversity module. The second frequency band isolation component can be a second duplexer for isolating the LB2 transmission signal and the LB1 and LB2 reception signals. Therefore, the antenna switching switch in the main module, the wire between the main module and the diversity module, and the antenna selection switch in the diversity module will all cause high losses in the transmission process of the LB2 frequency band radio frequency signal and the reception process of the LB1 and LB2 frequency band radio frequency signals, thereby affecting the network transmission efficiency of the LB1 and LB2 signals.

[0113] In view of this, an embodiment of the present application provides a radio frequency front-end module, which controls the conduction of the path between the external antenna and the first frequency band isolation component only through the antenna switching switch, so that the transmission signal of the LB1 signal and the reception signal of the LB1 signal and the LB2 signal are transmitted. In this way, only through the antenna switching switch, the loss of the transmission process of the radio frequency signal of the LB1 frequency band and the reception process of the radio frequency signals of the LB1 frequency band and the LB2 frequency band is low. Similarly, only through the antenna switching switch, the path between the external antenna and the second frequency band isolation component is controlled to be connected, so that the transmission signal of the LB2 signal and the reception signal of the LB1 signal and the LB2 signal are transmitted. In this way, only through the antenna switching switch, the loss of the transmission process of the radio frequency signal of the LB2 frequency band and the reception process of the radio frequency signals of the LB1 frequency band and the LB2 frequency band is low, thereby effectively improving the network transmission efficiency of the LB1 signal and the LB2 signal.

[0114] The following, combined with Figures 4 to 6, details the problem of high loss in the RF front-end module of the ENDC architecture of LB1+LB2 in NSA mode due to the large number of electronic devices and wires.

[0115] FIG4 is a schematic structural diagram of a radio frequency front-end module provided in an embodiment of the present application.

[0116] In one embodiment provided in the present application, the RF front-end module 22 includes a main module 221 and a diversity module 222. The main module 221 includes an antenna switching switch 2211 and an antenna selection switch 2212. One end of the antenna switching switch 2211 is connected to the antenna subsystem 30, and the other end of the antenna switching switch 2211 is respectively connected to one end of the antenna selection switch 2212 and the diversity module 222. The other end of the antenna selection switch 2212 is connected to the first RF isolation component 2218. The first RF isolation component 2218 is used to isolate the transmission path of the first frequency band RF signal and the receiving path of the first frequency band RF signal and the second frequency band RF signal. In this structure, the path loss between the first RF isolation component 2218 and the antenna subsystem 30 includes at least: the antenna switching switch 2211 and the antenna selection switch 2212.

[0117] Diversity module 222 includes an antenna selection switch 2221. One end of antenna selection switch 2221 is connected to antenna switching switch 2211 within main diversity module 221 via printed circuit board (PCB) traces. The other end of antenna selection switch 2221 is connected to second RF isolation component 2225. Second RF isolation component 2225 is used to isolate the transmission path of RF signals in the second frequency band from the reception path of RF signals in the first and second frequency bands. In this structure, the path loss between second RF isolation component 2225 and antenna subsystem 30 is at least caused by the antenna switching switch 2211, PCB traces, and antenna selection switch 2221.

[0118] For example, FIG5 is a circuit diagram of a radio frequency front-end module provided in an embodiment of the present application.

[0119] In one embodiment provided in the present application, an ENDC architecture of n28+B20 in NSA mode is used as an example of an electronic device 100. As shown in Figure 5, in an embodiment of the present application, the RF front-end module 22 includes a main set module 221 and a diversity module 222. The main set module 221 is connected to the first antenna ANT1 and the second antenna ANT2 respectively. Among them, the main set module 221 includes an antenna switching switch 2211, an antenna selection switch 2212, a B20 duplexer 2213, a B28 duplexer 2214, low noise amplifiers 2215 and 2217, an RF switch 2216, and an n28Tx+B20 / n28Rx duplexer 2218.

[0120] Antenna switch 2211 is connected to first antenna ANT1 and second antenna ANT2 via two interfaces (i.e., ANT1 and ANT2), respectively, to switch the path between first antenna ANT1 and antenna selection switch 2212, or between first antenna ANT1 and diversity module 222, or between second antenna ANT2 and antenna selection switch 2212, or between second antenna ANT2 and diversity module 222. Antenna selection switch 2212 is connected to antenna switch 2211 to select one or more RF channels, that is, to connect or disconnect the antenna switch 2211 from one or more channels of B20 duplexer 2213, B28 duplexer 2214, or n28Tx+B20 / n28PRx duplexer 2218.

[0121] B20 duplexer 2213, connected to antenna selector switch 2212, filters and conducts B20-band receive signals through an internal receive path. B28 duplexer 2214, connected to antenna selector switch 2212, filters and conducts B28-band receive signals through an internal receive path. Low-noise amplifiers 2215 and 2217, connected to B20 duplexer 2213 and B28 duplexer 2214, respectively, perform low-noise amplification on B20 and B28-band receive signals, removing noise and amplifying the RF signal. The RF switch 2216 is respectively connected to the B28 duplexer 2214, the n28Tx+B20 / n28PRx duplexer 2218 and the low noise amplifier 2217, and is used to select the path between the B28 duplexer 2214 and the low noise amplifier 2217, or the path between the n28Tx+B20 / n28PRx duplexer 2218 and the low noise amplifier 2217.

[0122] The n28Tx+B20 / n28PRx duplexer 2218 is connected to the antenna selector switch 2212 and is used to transmit signals in the n28 band through its internal transmit path and receive signals in the B20 and n28 bands through its internal receive path. Furthermore, the n28Tx+B20 / n28PRx duplexer 2218 is located outside the main module 221 and is connected to a movable contact of the antenna selector switch 2212 via the TX_IN1 interface of the main module 221. It is also connected to the RF switch 2216 via the LNA_AUX_IN1 interface of the main module 221.

[0123] It is understandable that the first antenna ANT1 and the second antenna ANT2 can be components independent of the RF front-end module 22, or can be integrated into the RF front-end module 22. At the same time, it should be understood that the first antenna ANT1 and the second antenna ANT2 can both independently perform the functions of transmitting and receiving signals, and serve as backup antennas for each other to prevent the transmission and reception of RF signals from being affected when one antenna fails or is blocked.

[0124] FIG6 is a signal trend diagram of a radio frequency front-end module provided in an embodiment of the present application.

[0125] As shown by the dashed line between the first antenna ANT1 and the n28Tx+B20 / n28PRx duplexer 2218 in FIG6 , for example, in the ENDC scenario with n28 signals and B20 signals, when the n28-band transmit signal needs to be transmitted to space via the master module 221, the n28-band transmit signal enters the antenna selector switch 2212 through the transmit path within the n28Tx+B20 / n28PRx duplexer 2218. Antenna selector switch 2212 selects the path between the n28Tx+B20 / n28PRx duplexer 2218 and the antenna switching switch 2211, allowing the n28-band transmit signal to pass through the antenna selector switch 2212 and enter the antenna switching switch 2211. Antenna switching switch 2211 then selects the path between the antenna selector switch 2212 and the first antenna ANT1, thereby transmitting the n28-band transmit signal from the first antenna ANT1 to space.

[0126] When the main module 221 needs to simultaneously receive signals in the n28 band and the B20 band, the first antenna ANT1 receives the n28 and B20 band signals. The antenna switching switch 2211 connects the first antenna ANT1 to the antenna selection switch 2212, allowing the n28 and B20 band signals to be sent to the antenna selection switch 2212 via the antenna switching switch 2211. The antenna selection switch 2212 connects the n28Tx+B20 / n28PRx duplexer 2218 to allow the n28 and B20 band signals to be sent to the RF switch 2216 via the antenna selection switch 2212 and the n28Tx+B20 / n28PRx duplexer 2218.

[0127] RF switch 2216 selects and conducts the path between n28Tx+B20 / n28PRx duplexer 2218 and low-noise amplifier 2217, so that the received signals in the n28 band and the B20 band are transmitted to low-noise amplifier 2217. Low-noise amplifier 2217 performs low-noise amplification on the received signals in the n28 band and the B20 band to obtain the received signals in the n28 band and the B20 band after noise removal.

[0128] Therefore, in the ENDC scenario of n28 signal + B20 signal, the loss between the first antenna ANT1 and the n28Tx + B20 / n28PRx duplexer 2218 includes at least: the loss of the antenna switching switch 2211 and the loss of the antenna selection switch 2212. For example, in one embodiment of the present application, the loss of the antenna switching switch 2211, illustratively, may have a typical value of 0.25dB. The loss of the antenna selection switch 2212, illustratively, may have a typical value of 0.3dB. The entire signal transmission process passes through many electronic devices and traces, and the loss is relatively high, which affects the transmission efficiency of the transmitted signal, the power consumption of the transmitting terminal, and the terminal sensitivity of the received signal, and has a greater impact on the network transmission efficiency.

[0129] As shown in Figure 5, in this embodiment of the present application, the diversity module 222 includes an antenna selection switch 2221, a B20+B28 surface acoustic wave filter 2222, a radio frequency switch 2223, a low noise amplifier 2224, and a B20Tx+B20 / n28DRx duplexer 2225. The antenna selection switch 2221 is connected to the antenna switching switch 2211 in the main collection module 221, and is used to select and conduct one or more radio frequency channels, that is, to make the antenna switching switch 2211 and one or more channels of the B20+B28 surface acoustic wave filter 2222 and the B20Tx+B20 / n28DRx duplexer 2225 connected or cut off.

[0130] B20+B28 SAW filter 2222, connected to antenna selector switch 2221, filters either the B20 or B28 signal. RF switch 2223, connected to B20+B28 SAW filter 2222, selects the path between low-noise amplifier 2224 and B20+B28 SAW filter 2222, or between low-noise amplifier 2224 and B20Tx+B20 / n28DRx duplexer 2225. Low-noise amplifier 2224, connected to RF switch 2223, performs low-noise amplification on received signals in the B20 and n28 bands, removing noise and amplifying the RF signal.

[0131] The B20Tx+B20 / n28DRx duplexer 2225 is connected to the antenna selector switch 2211 and the RF switch 2223, respectively. It conducts B20 band transmit signals through its internal transmit path and conducts receive signals between the B20 and n28 bands through its internal receive path. Furthermore, the B20Tx+B20 / n28DRx duplexer 2225 is located outside the diversity module 222 and is connected to a movable contact of the antenna selector switch 2221 via the TX_IN2 interface of the diversity module 222. It is also connected to the RF switch 2223 via the LNA_AUX_IN2 interface of the diversity module 222. The antenna selector switch 2221 is connected to the DRX_IN interface of the main module 221 via the ANT3 interface and wiring of the diversity module 222.

[0132] As shown by the dotted line between the second antenna ANT2 and the B20Tx+B20 / n28DRx duplexer 2225 in Figure 6, exemplarily, in the ENDC scenario with n28 and B20 signals, when diversity module 222 is required to radiate the B20-band transmit signal into space, the B20-band transmit signal enters antenna selector switch 2221 via the transmit path within B20Tx+B20 / n28DRx duplexer 2225. Antenna selector switch 2212 selects the path between B20Tx+B20 / n28DRx duplexer 2225 and antenna selector switch 2221, allowing the n28-band transmit signal to enter antenna switching switch 2211 via the trace and antenna selector switch 2221. Antenna switching switch 2211 then selects the path between antenna selector switch 2221 and the second antenna ANT2, allowing the B20-band transmit signal to radiate into space from the second antenna ANT2.

[0133] When diversity module 222 needs to simultaneously receive signals in the n28 and B20 bands, the second antenna ANT2 receives these signals. Antenna switch 2211 establishes a path between second antenna ANT2 and antenna selector switch 2221, allowing the n28 and B20 band signals to be transmitted through antenna switch 2211 within diversity module 221 to antenna selector switch 2221 within diversity module 222. Antenna selector switch 2221 establishes a path between antenna switch 2211 and B20Tx+B20 / n28DRx duplexer 2225, allowing the n28 and B20 band signals to be transmitted through antenna selector switch 2221 and B20Tx+B20 / n28DRx duplexer 2225 to RF switch 2223.

[0134] RF switch 2223 selects the path between B20Tx+B20 / n28DRx duplexer 2225 and low-noise amplifier 2224, allowing the n28-band receive signal and the B20-band receive signal to be transmitted to low-noise amplifier 2224. Low-noise amplifier 2224 performs low-noise amplification on the n28-band receive signal and the B20-band receive signal to obtain noise-removed n28-band receive signal and B20-band receive signal.

[0135] Therefore, in the ENDC scenario of n28 signals + B20 signals, the loss between the second antenna ANT2 and the B20Tx + B20 / n28DRx duplexer 2225 includes at least the loss of the antenna switching switch 2211, the routing loss between the DRX_IN interface of the main module 221 and the ANT3 interface of the diversity module 222, and the loss of the B20Tx + B20 / n28DRx duplexer 2225. For example, in one embodiment of the present application, the loss of the antenna switching switch 2211 may be, for example, a typical value of 0.25 dB, the loss of the PCB routing between the DRX_IN interface of the main module 221 and the ANT3 interface of the diversity module 222 may be, for example, a typical value of at least 0.25 dB, and the loss of the antenna selection switch 2221 may be, for example, a typical value of 0.3 dB. The entire signal transmission process involves many electronic devices and wiring, resulting in high losses. This affects the transmission efficiency of the transmitted signal, the power consumption of the transmitting terminal, and the terminal sensitivity of the receiving signal, and has a significant impact on network transmission efficiency.

[0136] Therefore, in order to solve the problem of high path loss between the first RF isolation component 2218 and the antenna subsystem 30, and high path loss between the second RF isolation component 2225 and the antenna subsystem 30 in the embodiment of the present application, the present application provides a RF front-end module to reduce the electronic devices or wiring between the antenna subsystem 30 and the first RF isolation component 2218 or the second RF isolation component 2225, thereby reducing the loss in the RF signal transmission path and effectively improving network transmission efficiency.

[0137] 7 to 15 , a solution for reducing electronic components or wiring between the antenna subsystem 30 and the first RF isolation component 2218 or the second RF isolation component 2225 in the RF front-end module of the ENDC architecture of LB1+LB2 in the NSA mode is described in detail.

[0138] FIG7 is a schematic structural diagram of a radio frequency front-end module provided in yet another embodiment of the present application.

[0139] In another embodiment provided by the present application, the RF front-end module 22 includes a main module 223, and the main module 221 includes an antenna switching switch 2231. One end of the antenna switching switch 2231 is connected to the antenna subsystem 30, and the other end of the antenna switching switch 2231 is respectively connected to a first RF isolation component 2232 and a second RF isolation component 2233. The first RF isolation component 2232 is used to isolate the transmission path of the first frequency band RF signal and the reception path of the first frequency band RF signal and the second frequency band RF signal. The second RF isolation component 2233 is used to isolate the transmission path of the second frequency band RF signal and the reception path of the first frequency band RF signal and the second frequency band RF signal. In this structure, the path loss between the first RF isolation component 2232 and the antenna subsystem 30 includes at least the antenna switching switch 2231. The path loss between the second RF isolation component 2233 and the antenna subsystem 30 includes at least the antenna switching switch 2231.

[0140] Therefore, compared with the structure of the RF front-end module in Figure 4, in the embodiment of the present application, the electronic devices in the path between the first RF isolation component 2232 and the antenna subsystem 30 are reduced, and the electronic devices and PCB routing in the path between the second RF isolation component 2233 and the antenna subsystem 30 are reduced, thereby reducing the path loss between the first RF isolation component 2232 and the antenna subsystem 30, reducing the path loss between the second RF isolation component 2233 and the antenna subsystem 30, and improving the network transmission efficiency of the RF front-end module.

[0141] FIG8 is a schematic structural diagram of a radio frequency front-end module provided in yet another embodiment of the present application.

[0142] Optionally, as shown in FIG8 , in an embodiment of the present application, the antenna switching switch 2231 in the RF front-end module 22 may also be disposed outside the main module 221 to facilitate later updates and maintenance.

[0143] FIG9 is a schematic structural diagram of a radio frequency front-end module provided in yet another embodiment of the present application.

[0144] Optionally, in the embodiment of the present application, the first RF isolation component 2232 and the second RF isolation component 2233 may also be disposed inside the main module 223, so that the first RF isolation component 2232 and the second RF isolation component 2233 and the antenna switching switch 2231 are all integrated into the main module 223. When the lead distance between the first RF isolation component 2232 and the second RF isolation component 2233 and the antenna switching switch 2231 is shortened, the loss can also be reduced, thereby improving the overall integration of the RF front-end module.

[0145] FIG10 is a schematic structural diagram of a radio frequency front-end module provided in yet another embodiment of the present application.

[0146] Optionally, in the embodiment of the present application, based on actual wiring requirements, the first RF isolation component 2232 may be disposed inside the main module 223, and the second RF isolation component 2233 may be disposed outside the main module 223. Shortening the lead distance between the first RF isolation component 2232 and the antenna switching switch 2231 can also reduce losses and improve the overall integration of the RF front-end module.

[0147] FIG11 is a schematic structural diagram of a radio frequency front-end module provided in yet another embodiment of the present application.

[0148] Optionally, in the embodiment of the present application, based on actual wiring requirements, the second RF isolation component 2233 may be disposed inside the main module 223, and the first RF isolation component 2232 may be disposed outside the main module 223. Shortening the lead distance between the second RF isolation component 2233 and the antenna switching switch 2231 can also reduce losses and improve the overall integration of the RF front-end module.

[0149] FIG12 is a schematic structural diagram of a radio frequency front-end module provided in yet another embodiment of the present application.

[0150] Optionally, as shown in FIG12 , based on the structural diagram of the RF front-end module shown in FIG7 , in an embodiment of the present application, the RF front-end module 22 further includes a diversity module 224. The diversity module 224 includes an antenna selection switch 2241. One end of the antenna selection switch 2241 is connected to the antenna switching switch 2211 in the main module 221 via a printed circuit board (PCB) trace. In this structure, the diversity module 224 does not assume the dual connection function of the RF signals of the two frequency bands.

[0151] FIG13 is a schematic structural diagram of a radio frequency front-end module provided in another embodiment of the present application.

[0152] Optionally, as shown in FIG13 , in an embodiment of the present application, the antenna switching switch 2231 in the RF front-end module 22 may also be provided outside the main module 221 to facilitate later updates and maintenance.

[0153] FIG14 is a circuit diagram of a radio frequency front-end module provided in another embodiment of the present application.

[0154] As shown in FIG14 , in one implementation of the embodiment of the present application, the RF front-end module 22 includes a main module 223 and a diversity module 224 , and the main module 223 is connected to the first antenna ANT1 and the second antenna ANT2 , respectively. Among them, the main set module 223 includes an antenna switching switch 2231, an n28Tx+B20 / n28Rx duplexer 2232 and a B20Tx+B20 / n28Rx duplexer 2233. The antenna switching switch 2231 is set inside the main set module 223 and is connected to the first antenna ANT1 and the second antenna ANT2 through two interfaces (i.e., the ANT1 interface and the ANT2 interface) respectively, and is used to switch the path between the first antenna ANT1 and the n28Tx+B20 / n28Rx duplexer 2232 or the path between the first antenna ANT1 and the B20Tx+B20 / n28Rx duplexer 2233, or switch the path between the second antenna ANT2 and the n28Tx+B20 / n28Rx duplexer 2232 or the path between the second antenna ANT2 and the B20Tx+B20 / n28Rx duplexer 2233.

[0155] The n28Tx+B20 / n28Rx duplexer 2232 is located outside the main module 223 and connected to the antenna switch 2231 via the TX_IN1 interface. It is used to transmit signals in the n28 band through its internal transmit path and receive signals between the B20 and n28 bands through its internal receive path. The B20Tx+B20 / n28Rx duplexer 2233 is located outside the main module 223 and connected to the antenna switch 2231 via the TX_IN2 interface. It is used to transmit signals in the B20 band through its internal transmit path and receive signals between the B20 and n28 bands through its internal receive path.

[0156] It should be noted that the antenna switching switch 2231 can also be set outside the main set module 223 to separate the antenna switching switch 2231 from the main set module 223, so as to facilitate later updating and maintenance of the antenna switching switch 2231. The connection method of other electronic components is the same as the above embodiment.

[0157] FIG15 is a signal trend diagram of a radio frequency front-end module provided in another embodiment of the present application.

[0158] As shown by the dotted line between the first antenna ANT1 and the n28Tx+B20 / n28Rx duplexer 2232 in FIG15 , illustratively, taking the ENDC scenario of the n28 signal + B20 signal as an example, in one embodiment of the present application, when it is necessary to transmit the transmission signal of the n28 frequency band to space through the main set module 223, the transmission signal of the n28 frequency band enters the antenna selection switch 2231 through the transmission channel in the n28Tx+B20 / n28Rx duplexer 2232. The antenna selection switch 2231 selects to conduct the path between the n28Tx+B20 / n28Rx duplexer 2232 and the first antenna ANT1, thereby radiating the transmission signal of the n28 frequency band from the first antenna ANT1 to space.

[0159] For example, in another embodiment of the present application, when it is necessary to simultaneously receive the received signals of the n28 frequency band and the B20 frequency band through the main set module 223, the received signals of the n28 frequency band and the B20 frequency band are received from the first antenna ANT1. The antenna switching switch 2231 connects the path between the first antenna ANT1 and the n28Tx+B20 / n28Rx duplexer 2232, so that the received signals of the n28 frequency band and the B20 frequency band are sent to the n28Tx+B20 / n28Rx duplexer 2232 through the antenna switching switch 2231, thereby obtaining the received signals of both the n28 frequency band and the N20 frequency band.

[0160] For example, in another embodiment of the present application, when the B20 band transmit signal needs to be transmitted to space through the main set module 223, the B20 band transmit signal enters the antenna selection switch 2231 through the transmit channel within the B20Tx+B20 / n28Rx duplexer 2233. The antenna selection switch 2231 selects to conduct the path between the B20Tx+B20 / n28Rx duplexer 2233 and the second antenna ANT2, thereby transmitting the B20 band transmit signal from the second antenna ANT2 to space.

[0161] For example, in another embodiment of the present application, when it is necessary to simultaneously receive signals in the n28 band and the B20 band through the main module 223, the n28 band and the B20 band are received from the second antenna ANT2. The antenna switching switch 2231 connects the second antenna ANT2 to the B20Tx+B20 / n28Rx duplexer 2233, so that the n28 band and the B20 band are sent to the B20Tx+B20 / n28Rx duplexer 2233 through the antenna switching switch 2231, thereby obtaining received signals in both the n28 band and the N20 band.

[0162] Therefore, in the ENDC scenario of the present application with n28 signals + B20 signals, the loss between the first antenna ANT1 and the n28Tx + B20 / n28Rx duplexer 2232 includes at least the loss of the antenna switching switch 2231. For example, a typical value can be 0.3 dB. Compared to Figure 5 , the antenna switching switch 2212 within the main module 221 is reduced, thereby reducing the loss of the antenna switching switch 2212. The loss between the second antenna ANT2 and the B20Tx + B20 / n28Rx duplexer 2233 includes at least the loss of the antenna switching switch 2211. For example, a typical value can be 0.3 dB. Compared to Figure 5 , the PCB traces between the main module 221 and the diversity module 222 and the antenna switching switch 2221 within the diversity module 222 are reduced, thereby reducing the loss of the PCB traces between the main module 221 and the diversity module 222 and the loss of the antenna switching switch 2221. The entire signal transmission process involves fewer electronic devices and wiring, resulting in lower losses. The transmission efficiency, power consumption and receiving sensitivity of the terminal products are effectively improved, thereby improving network transmission efficiency.

[0163] As shown in Figure 14, in another implementation of the present embodiment, the main module 223 further includes an antenna selection switch 2234, a B20 duplexer 2235, a B28 duplexer 2236, RF switches 2237 and 2238, and low-noise amplifiers 2239 and 2240, all located within the main module 223. The antenna selection switch 2234 is connected to the antenna switching switch 2231 and is used to select one or more RF channels. In other words, it connects or disconnects the antenna switching switch 2231 from one or more channels of the B20 duplexer 2235 or the B28 duplexer 2236. The B20 duplexer 2235 is connected to the antenna selection switch 2234 and is used to filter and transmit received signals in the B20 frequency band through its internal receive path. The B28 duplexer 2236 is connected to the antenna selection switch 2234 and is used to filter and transmit received signals in the B28 frequency band through its internal receive path.

[0164] The RF switch 2237 is connected to the B20 duplexer 2235 and the n28Tx+B20 / n28Rx duplexer 2232, respectively, and is used to select the path between the B20 duplexer 2235 and the low-noise amplifier 2239, or the path between the n28Tx+B20 / n28Rx duplexer 2232 and the low-noise amplifier 2239. The RF switch 2238 is connected to the B28 duplexer 2236 and the B20Tx+B20 / n28Rx duplexer 2233, respectively, and is used to select the path between the B28 duplexer 2236 and the low-noise amplifier 2240, or the path between the B20Tx+B20 / n28Rx duplexer 2233 and the low-noise amplifier 2240.

[0165] Low-noise amplifier 2239, connected to RF switch 2237, is used to perform low-noise amplification on the B20 band received signal and / or the n28 band received signal, respectively, to remove noise and amplify the RF signal. Low-noise amplifier 2240, connected to RF switch 2238, is used to perform low-noise amplification on the B28 band received signal, the n28 band received signal, and / or the B20 band received signal, respectively, to remove noise and amplify the RF signal. In addition, RF switch 2237 is connected to n28Tx+B20 / n28Rx duplexer 2232 via the LNA_AUX_IN1 interface. RF switch 2238 is connected to B20Tx+B20 / n28Rx duplexer 2233 via the LNA_AUX_IN2 interface.

[0166] Optionally, in the embodiment of the present application, the B28 duplexer 2236 can be replaced with a B28a duplexer or an n28 duplexer. The present application does not limit the duplexer network signal between the antenna selection switch 2234 and the two RF switches. That is, it can be a 4G signal or a 5G signal, or one can be a 4G signal and the other can be a 5G signal.

[0167] Diversity module 224 includes an antenna selection switch 2241, a B20+B28 duplexer 2242, a radio frequency switch 2243, and a low-noise amplifier 2244, all located within diversity module 224. Antenna selection switch 2241, connected to antenna switching switch 2231, selects one or more radio frequency channels, essentially enabling or blocking the channel between antenna switching switch 2231 and B20+B28 duplexer 2242. B20+B28 duplexer 2242, connected to antenna selection switch 2241, filters and conducts either B20 or B28 signals through its internal receive path. Radio frequency switch 2243, connected to B20+B28 duplexer 2242, selects the channel between B20+B28 duplexer 2242 and low-noise amplifier 2244. Low-noise amplifier 2244, connected to RF switch 2243, is used to perform low-noise amplification on the B20 or B28 signals to remove noise and amplify the RF signal. Additionally, antenna selector switch 2241 is connected to the DRX_IN interface of the master module 223 via the ANT3 interface of the diversity module 224.

[0168] As shown in FIG15 , in another embodiment of the present application, when the main module 223 needs to receive a B28 band receive signal or a B20 band receive signal, the B28 band receive signal or the B20 band receive signal is received from the first antenna ANT1. The antenna switching switch 2231 connects the first antenna ANT1 to the antenna selection switch 2234, so that the B28 band receive signal or the B20 band receive signal is sent to the antenna selection switch 2234 via the antenna switching switch 2231. The antenna selection switch 2234 connects the antenna switching switch 2231 to the B20 duplexer 2235 or the B28 duplexer 2236, so that the B20 band receive signal is sent to the RF switch 2237 via the antenna selection switch 2234 and the B20 duplexer 2235, or the B28 band receive signal is sent to the RF switch 2238 via the antenna selection switch 2234 and the B28 duplexer 2236.

[0169] RF switch 2237 selects to conduct the path between B20 duplexer 2235 and low-noise amplifier 2239, thereby transmitting the received signal in the B20 band to low-noise amplifier 2239. RF switch 2238 selects to conduct the path between B28 duplexer 2236 and low-noise amplifier 2240, thereby transmitting the received signal in the B28 band to low-noise amplifier 2240. Low-noise amplifier 2239 performs low-noise amplification on the received signal in the B20 band to obtain a noise-removed received signal in the B20 band. Low-noise amplifier 2240 performs low-noise amplification on the received signal in the B28 band to obtain a noise-removed received signal in the B28 band.

[0170] As shown in Figure 15, in another embodiment of the present application, when it is necessary to receive signals in the B28 and B20 bands via the diversity module 224, the B28 and B20 bands are received from the second antenna ANT2. The antenna switching switch 2231 connects the second antenna ANT2 to the antenna selection switch 2241, allowing the B28 and B20 bands to be transmitted to the antenna selection switch 2241 within the diversity module 224 via the antenna switching switch 2231 within the main diversity module 223. The antenna selection switch 2241 connects the antenna switching switch 2231 to the B20+B28 duplexer 2242, allowing the B28 and B20 bands to be transmitted to the RF switch 2243 via the antenna selection switch 2241 and the B20+B28 duplexer 2242.

[0171] RF switch 2243 selects to conduct the path between B20+B28 duplexer 2242 and low-noise amplifier 2244, so that the received signals in the B28 band and the B20 band are transmitted to low-noise amplifier 2244. Low-noise amplifier 2244 performs low-noise amplification on the received signals in the B28 band and the B20 band to obtain the noise-removed received signals in the B28 band and the B20 band.

[0172] Based on the above circuit structure, it can be understood that the antenna switching switch 2231 can select a single-pole multi-throw switch (SPnT) with a complete or partial path to meet the switching of the paths between the first antenna ANT1 and the n28Tx+B20 / n28Rx duplexer 2232, the B20Tx+B20 / n28Rx duplexer 2233, the antenna selection switch 2233 and the antenna selection switch 2241, thereby completing the transmission and reception processes of the RF signals in the two frequency bands.

[0173] Based on the above circuit structure, it can be understood that the antenna switching switch 2231 can also select a double-pole multi-throw switch (DPnT) with a full or partial path to switch the paths between the first antenna ANT1 and the second antenna ANT2 and the n28Tx+B20 / n28Rx duplexer 2232, the B20Tx+B20 / n28Rx duplexer 2233, the antenna selection switch 2233, and the antenna selection switch 2241, respectively, to complete the transmission and reception processes of RF signals in two frequency bands. Among them, the first antenna ANT1 and the second antenna ANT2 can serve as backup antennas for each other.

[0174] An embodiment of the present application further provides a radio frequency front-end chip, comprising the radio frequency front-end module 22 as described above.

[0175] An embodiment of the present application also provides an electronic device, including the RF front-end chip, RF transceiver chip, and antenna subsystem as described above, wherein the RF transceiver chip is connected to the RF front-end module and is used to send a control signal to the antenna switching switch to control the connection or disconnection of the path of the first frequency band RF signal and the path of the second frequency band RF signal. The antenna subsystem includes a first antenna and a second antenna, wherein the first antenna is connected to the antenna switching switch and is used to receive or transmit the first frequency band RF signal and the second frequency band RF signal. The second antenna is connected to the antenna switching switch and is used to receive or transmit the first frequency band RF signal and the second frequency band RF signal.

[0176] Optionally, the electronic device further includes a power subsystem, which is used to provide voltage to the RF front-end module.

[0177] The beneficial effects that can be achieved by the electronic device provided in the above-mentioned embodiments of the present application can be referred to the beneficial effects corresponding to the modules provided above, and will not be repeated here.

[0178] It should be understood that the above is only to help those skilled in the art better understand the embodiments of the present application, and is not intended to limit the scope of the embodiments of the present application. Based on the above examples given, those skilled in the art can obviously make various equivalent modifications or changes. For example, certain steps in each embodiment of the above detection method may be unnecessary, or certain new steps may be added. Or a combination of any two or any multiple embodiments described above. Such modifications, changes, or combined solutions also fall within the scope of the embodiments of the present application.

[0179] It should also be understood that the above description of the embodiments of the present application focuses on emphasizing the differences between the various embodiments. The same or similar points that are not mentioned can be referenced with each other. For the sake of brevity, they will not be repeated here.

[0180] It should also be understood that the size of the serial numbers of the above-mentioned processes does not mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of this application.

[0181] It should also be understood that in the embodiments of the present application, "pre-setting" and "pre-definition" can be achieved by pre-saving corresponding codes, tables or other methods that can be used to indicate relevant information in a device (for example, including an electronic device), and the present application does not limit its specific implementation method.

[0182] It should also be understood that the division of the modes, situations, categories and embodiments in the embodiments of the present application is only for the convenience of description and should not constitute a special limitation. The features of various modes, categories, situations and embodiments can be combined without contradiction.

[0183] It should also be understood that in the various embodiments of the present application, unless otherwise specified or there is a logical conflict, the terms and / or descriptions between different embodiments are consistent and can be referenced to each other, and the technical features in different embodiments can be combined to form new embodiments according to their internal logical relationships.

[0184] Finally, it should be noted that the above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any changes or substitutions within the technical scope disclosed in this application should be included in the scope of protection of this application. Therefore, the scope of protection of this application should be based on the scope of protection of the claims.

Claims

1. A radio frequency front-end module, characterized in that: include: An antenna switch is configured to switch the path of the first frequency band radio frequency signal and / or the path of the second frequency band radio frequency signal on or off; The path of the radio frequency signal in the first frequency band includes a transmitting path and a receiving path, and the path of the radio frequency signal in the second frequency band includes a transmitting path and a receiving path; a first radio frequency isolation component connected to the antenna switching switch and configured to isolate a transmission path of the radio frequency signal of the first frequency band and a receiving path of the radio frequency signal of the first frequency band and the radio frequency signal of the second frequency band; and / or, a second radio frequency isolation component connected to the antenna switching switch, configured to isolate a transmission path of the radio frequency signal of the second frequency band, and a receiving path of the radio frequency signal of the first frequency band and the radio frequency signal of the second frequency band; The first frequency band radio frequency signal is different from the second frequency band radio frequency signal.

2. The RF front-end module according to claim 1, characterized in that: The first frequency band radio frequency signal and the second frequency band radio frequency signal are both in a low frequency band.

3. The RF front-end module according to claim 1, characterized in that: One of the first frequency band radio frequency signal and the second frequency band radio frequency signal is a 4G signal, and the other is a 5G signal.

4. The RF front-end module according to claim 1, characterized in that: The RF front-end module also includes a main module, and the antenna switching switch is arranged inside the main module.

5. The radio frequency front-end module according to claim 1, characterized in that: The RF front-end module also includes a main module, and the antenna switching switch is arranged outside the main module.

6. The radio frequency front-end module according to claim 4 or 5, characterized in that: The first radio frequency isolation component and the second radio frequency isolation component are arranged inside or outside the main assembly module.

7. The radio frequency front-end module according to any one of claims 1 to 5, characterized in that: The antenna switching switch comprises a single-pole n-throw switch, n≥4, and n is an integer; Two moving contacts of the single-pole n-throw switch are respectively connected to the first radio frequency isolation component and the second radio frequency isolation component, and one fixed contact of the single-pole n-throw switch is connected to the first antenna.

8. The radio frequency front-end module according to any one of claims 1 to 5, characterized in that: The antenna switching switch comprises a double-pole n-throw switch, n≥4, and n is an integer; Two moving contacts of the double-pole n-throw switch are respectively connected to the first radio frequency isolation component and the second radio frequency isolation component, and two fixed contacts of the double-pole n-throw switch are respectively connected to the first antenna and the second antenna.

9. The radio frequency front-end module according to any one of claims 1 to 5, characterized in that: The first RF isolation component includes a first duplexer; the antenna end of the first duplexer is connected to the antenna switching switch, the transmitting path of the first duplexer conducts the transmitting signal of the first frequency band RF signal, and the receiving path of the first duplexer conducts the receiving signal of the first frequency band RF signal and the second frequency band RF signal.

10. The radio frequency front-end module according to any one of claims 1 to 5, characterized in that: The second RF isolation component includes a second duplexer; the antenna end of the second duplexer is connected to the antenna switching switch, the transmitting path of the second duplexer conducts the transmitting signal of the second frequency band RF signal, and the receiving path of the second duplexer conducts the receiving signal of the first frequency band RF signal and the second frequency band RF signal.

11. The radio frequency front-end module according to claim 4 or 5, characterized in that: The radio frequency front-end module also includes: A first antenna selection switch, disposed inside the main module, connected to the antenna switching switch, and configured to select and conduct a receiving path of the first frequency band radio frequency signal and / or a receiving path of the second frequency band radio frequency signal; A third duplexer, disposed inside the main module, connected to the first antenna selection switch, and configured to conduct a reception signal of the radio frequency signal in the first frequency band; The fourth duplexer is arranged inside the main set module, connected to the first antenna selection switch, and configured to conduct the receiving signal of the radio frequency signal in the second frequency band.

12. The radio frequency front-end module according to claim 11, characterized in that: The radio frequency front-end module also includes: a first RF switch, arranged inside the main module, connected to the third duplexer and the first RF isolation component respectively, and configured to conduct a receiving path of the RF signal of the first frequency band, or a receiving path of the RF signal of the first frequency band and the RF signal of the second frequency band; The second RF switch is arranged inside the main assembly module, and is respectively connected to the fourth duplexer and the second RF isolation component, and is configured to conduct the receiving path of the second frequency band RF signal, or the receiving path of the first frequency band RF signal and the second frequency band RF signal.

13. The radio frequency front-end module according to claim 12, characterized in that: The radio frequency front-end module also includes: a first low noise amplifier, disposed inside the main module, connected to the first RF switch, and configured to amplify a received signal of the first frequency band RF signal or a received signal of the second frequency band RF signal; The second low noise amplifier is arranged inside the main set module, connected to the second RF switch, and configured to amplify the received signal of the RF signal in the first frequency band or the received signal of the RF signal in the second frequency band.

14. The radio frequency front-end module according to claim 4 or 5, characterized in that: The RF front-end module also includes a diversity module, which is connected to the main collection module and is configured to assist in receiving a reception signal of the RF signal in the first frequency band or a reception signal of the RF signal in the second frequency band.

15. The radio frequency front-end module according to claim 14, characterized in that: The diversity module comprises: A second antenna selection switch, connected to the antenna switching switch, and configured to select and conduct a receiving path of the first frequency band radio frequency signal or a receiving path of the second frequency band radio frequency signal; The filter is connected to the second antenna selection switch and is configured to filter the received signal of the first frequency band radio frequency signal or the received signal of the second frequency band radio frequency signal.

16. The radio frequency front-end module according to claim 15, characterized in that: The diversity module also includes: The third RF switch is connected to the filter and is configured to conduct a receiving path of the RF signal in the first frequency band or a receiving path of the RF signal in the second frequency band.

17. The radio frequency front-end module according to claim 16, characterized in that: The diversity module also includes: The third low noise amplifier is connected to the third RF switch and is configured to amplify the received signal of the RF signal in the first frequency band or the received signal of the RF signal in the second frequency band.

18. A radio frequency front-end chip, characterized in that: A radio frequency front-end module comprising any one of claims 1 to 17.

19. An electronic device, characterized in that: include: The radio frequency front-end chip according to claim 18, A radio frequency transceiver chip, connected to the radio frequency front-end module, and configured to send a control signal to the antenna switch to control the conduction or disconnection of a path of the radio frequency signal of the first frequency band and a path of the radio frequency signal of the second frequency band; The antenna subsystem is connected to the RF front-end module and is configured to receive and / or send RF signals in the first frequency band and RF signals in the second frequency band.

20. The electronic device according to claim 19, characterized in that The antenna subsystem comprises: A first antenna, connected to the antenna switch, and configured to receive or send the first frequency band radio frequency signal and the second frequency band radio frequency signal; The second antenna is connected to the antenna switch and is configured to receive or send the first frequency band radio frequency signal and the second frequency band radio frequency signal.

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