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

Abstract

The invention discloses a radio frequency front-end module, a radio frequency front-end chip and electronic equipment, and relates to the technical field of communication, and the radio frequency front-end module comprises an antenna change-over switch which is configured to switch on a path of a first frequency band radio frequency signal and / or a path of a second frequency band radio frequency signal; the channel of the first frequency band radio frequency signal comprises a transmitting channel and a receiving channel, and the channel of the second frequency band radio frequency signal comprises a transmitting channel and a receiving channel. The first radio frequency isolation component is connected with the antenna change-over switch and is configured to isolate a transmitting path of the first frequency band radio frequency signal and a receiving path of the first frequency band radio frequency signal and the second frequency band radio frequency signal; and the second radio frequency isolation assembly is connected with the antenna change-over switch and is configured to isolate a transmitting path of the second frequency band radio frequency signal and a receiving path of the first frequency band radio frequency signal and the second frequency band radio frequency signal. Based on the scheme of the invention, the loss in a radio frequency path can be reduced, and the network transmission efficiency is improved.

Description

Technical Field

[0001] 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

[0002] With the development of mobile communication technology, users have higher and higher requirements for network transmission efficiency. For example, when the first mobile communication network is widely used, a second mobile communication network is often developed, thus forming a dual connectivity technology with the first mobile communication network as the main and the second mobile communication network as the auxiliary, so that major operators can gradually transition to the second mobile communication network.

[0003] At present, in order to meet the dual connection requirements of operators in various regions, the RF front-end modules of terminal products generally use the main set module and the diversity module to form two sets of RF paths to transmit and receive RF signals of two frequency bands. However, due to the large number of electronic devices and wiring passing through the two sets of RF paths, the loss of the two sets of RF paths is relatively large, affecting the network transmission efficiency.

[0004] Therefore, how to reduce the loss in the RF path and improve network transmission efficiency has become an urgent problem to be solved. Summary of the invention

[0005] 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.

[0006] In order to achieve the above objectives, this application adopts the following technical solutions:

[0007] In a first aspect, a radio frequency front-end module is provided, comprising: 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.

[0008] 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 wiring, and the loss is lower, which effectively improves the network transmission efficiency.

[0009] In combination with the first aspect, in some 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.

[0010] 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.

[0011] 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.

[0012] In this implementation, the first frequency band radio frequency signal and the second frequency band radio frequency signal are respectively a 4G signal and a 5G signal, so that the radio frequency front-end module of the present application is suitable for a dual connection structure of 4G and 5G.

[0013] In combination with the first aspect, in some implementations of the first aspect, the RF front-end module also includes a main set module, and the antenna switching switch is arranged inside the main set module.

[0014] In the embodiment of the present application, the antenna switching switch is arranged inside the main module, and the first RF isolation component and the second RF isolation component are arranged outside the main module, so that the antenna switching switch is integrated with other electronic components in the main module, reducing the area occupied by the antenna switching switch in the RF front-end module. The first frequency band RF signal only passes through the antenna switching switch between the first RF isolation component and the antenna subsystem, and the second frequency 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 frequency band RF signals, the RF signal passes through fewer electronic components and wiring, the loss is lower, and the network transmission efficiency is effectively improved.

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

[0016] In the embodiment of the present application, the antenna switching switch, the first RF isolation component and the second RF isolation component are all arranged outside the main module, so that the antenna switching switch is separated from the main module, which is convenient for later update and maintenance. The first frequency band RF signal only passes through the antenna switching switch between the first RF isolation component and the antenna subsystem, and the second frequency 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 frequency band RF signals. The RF signal passes through fewer electronic devices and wiring, and the loss is low, which effectively improves the network transmission efficiency.

[0017] 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.

[0018] In the embodiment of the present application, the first RF isolation component and the second RF isolation component can be arranged inside or outside the main module according to actual needs, and will not affect the transmission process of the RF signal. At the same time, for the purpose of circuit integration or layout, the first RF isolation component and the second RF isolation component can be arranged inside the main module and outside the main module, or both inside or outside the main module.

[0019] 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.

[0020] In this implementation, the antenna switching switch adopts 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.

[0021] 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.

[0022] 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 connected or disconnected, while not affecting the single-band RF path in the RF front-end module.

[0023] 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 signal of the first frequency band RF signal and the second frequency band RF signal.

[0024] 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.

[0025] 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 signal of the first frequency band RF signal and the second frequency band RF signal.

[0026] 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.

[0027] 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.

[0028] In this implementation, the first antenna selection switch is used to select and conduct 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 conduct the receiving signal of the first frequency band RF signal, and the fourth duplexer is used to conduct 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.

[0029] 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, respectively connected to the third duplexer and the first RF isolation component, 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, respectively connected to the fourth duplexer and the second RF isolation component, 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.

[0030] In this implementation, the first RF switch is used to conduct the reception signal of the first frequency band RF signal of a single frequency band or the reception signal of the first frequency band RF signal and the second frequency band RF signal of a dual frequency band, and the second RF switch is used to conduct the reception signal of the second frequency band RF signal of a single frequency band or the reception signal of the first frequency band RF signal and the second frequency band RF signal of the dual frequency band.

[0031] In combination with the first aspect, in some 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.

[0032] 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 radio frequency signal in the first frequency band or the received signal of the radio frequency signal in the second frequency band.

[0033] 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.

[0034] 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.

[0035] 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.

[0036] 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 second frequency band radio frequency signal, and the receiving signal of the first frequency band radio frequency signal or the second frequency band radio frequency signal selected by the second antenna selection switch is filtered by a filter.

[0037] In combination with the first aspect, in some implementations of the first aspect, the diversity module also includes: a third RF switch, connected to the filter, and 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.

[0038] In this implementation, the third radio frequency switch is used to select and 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.

[0039] In this implementation, the diversity module further includes: a third low noise amplifier connected to the third RF switch and configured to amplify a received signal of the RF signal in the first frequency band or a received signal of the RF signal in the second frequency band.

[0040] In this implementation, the received signal of the first frequency band radio frequency signal or the received signal of the second frequency band radio frequency signal is low-noise amplified by the third low-noise amplifier.

[0041] In a second aspect, a radio frequency front-end chip is provided, including the radio frequency front-end module.

[0042] 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 receiving 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, thereby completing the transmission and reception process of the two-band RF signals. The RF signal passes through fewer electronic devices and wiring, and the loss is lower, thereby effectively improving the network transmission efficiency.

[0043] 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.

[0044] 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, thereby completing the transmission and reception process of the two-band RF signals. The RF signal passes through fewer electronic devices and wiring, and the loss is lower, thereby effectively improving the network transmission efficiency.

[0045] 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.

[0046] In this implementation, the first antenna and the second antenna are used to transmit and receive radio frequency signals in the first frequency band and radio frequency signals in the second frequency band, and the specific receiving path and transmitting path are controlled by an antenna switching switch. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] Figure 1 A schematic diagram of a scenario of a mobile communication system to which an embodiment of the present application is applicable;

[0048] Figure 2 A schematic diagram of the structure of an electronic device provided in an embodiment of the present application;

[0049] Figure 3 This is a schematic diagram of the structure of a radio frequency front-end module provided in an embodiment of the present application;

[0050] Figure 4 This is a schematic diagram of the structure of a radio frequency front-end module provided in an embodiment of the present application;

[0051] Figure 5 A circuit diagram of a radio frequency front-end module provided in an embodiment of the present application;

[0052] Figure 6A signal trend diagram of a radio frequency front-end module provided in an embodiment of the present application;

[0053] Figure 7 A schematic diagram of the structure of a radio frequency front-end module provided in another embodiment of the present application;

[0054] Figure 8 A schematic diagram of the structure of a radio frequency front-end module provided in another embodiment of the present application;

[0055] Fig. 9 A schematic diagram of the structure of a radio frequency front-end module provided in another embodiment of the present application;

[0056] Fig.10 A schematic diagram of the structure of a radio frequency front-end module provided in another embodiment of the present application;

[0057] Fig.11 A schematic diagram of the structure of a radio frequency front-end module provided in another embodiment of the present application;

[0058] Fig.12 A schematic diagram of the structure of a radio frequency front-end module provided in another embodiment of the present application;

[0059] Fig.13 A schematic diagram of the structure of a radio frequency front-end module provided in another embodiment of the present application;

[0060] Fig.14 A circuit diagram of a radio frequency front-end module provided in yet another embodiment of the present application;

[0061] Fig.15 This is a signal trend diagram of a radio frequency front-end module provided in yet another embodiment of the present application. DETAILED DESCRIPTION

[0062] The technical solutions in the embodiments of the present application will be described clearly and in detail below in conjunction with the accompanying drawings. In the description of the embodiments of the present application, unless otherwise specified, " / " means or, for example, A / B can mean A or B; "and / or" in the text is only a description of the association relationship of the associated objects, indicating that there can be three relationships, for example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone.

[0063] The terms "first", "second", etc. are used for descriptive purposes only and should not be understood to imply or suggest relative importance or implicitly indicate the number of technical features indicated. Thus, features defined as "first" or "second" may explicitly or implicitly include one or more of the features, and in the description of the embodiments of the present application, unless otherwise specified, "plurality" means two or more.

[0064] 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.

[0065] 1. Long term evolution (LTE)

[0066] LTE is the long-term evolution of the Universal Mobile Telecommunications System (UMTS) technical standard developed by the 3rd Generation Partnership Project (3GPP) and is widely used in 4G networks.

[0067] 2. New radio (NR)

[0068] In the field of communications, NR refers to the global 5G standard with a new air interface design based on orthogonal frequency division multiplexing (OFDM).

[0069] 3. E-UTRAN New Radio-Dual Connectivity (evolved universal terrestrial radio access network new radio-dual connectivity, ENDC)

[0070] In the field of communications, ENDC refers to a dual-connection technology that uses 4G as the core network, 4G base stations as the main network, and 5G base stations as the auxiliary 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.

[0071] 4. Radio frequency front end (RFFE)

[0072] 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 the mobile phone.

[0073] 5. Transmit (TX)

[0074] In the field of communications, transmission refers to the act of sending data from one device to another device or a group of devices.

[0075] 6. Receive (Receive, RX)

[0076] In the field of communications, reception refers to the process of converting transmitted signals into perceptible information.

[0077] 7. Bx and Nx

[0078] B is the beginning of the frequency band number of the LTE standard, N is the beginning of the frequency band number of the NR standard, and x is the frequency band number. Bx represents the frequency band corresponding to the LTE frequency band number x; Nx represents the frequency band corresponding to the NR frequency band number x. For example, B20 represents the frequency band corresponding to the LTE frequency band number 20, the frequency range corresponding to the B20 uplink frequency band is 832MHz~862MHz, and the frequency range corresponding to the B20 downlink frequency band is 791MHz~821MHz; N28 represents the frequency band corresponding to the NR frequency band number 28, the frequency range corresponding to the N28 uplink frequency band is 703MHz~748MHz, and the frequency range corresponding to the B20 downlink frequency band is 758MHz~803MHz; B28 represents the frequency band corresponding to the LTE frequency band number 28, the frequency range corresponding to the B28 uplink frequency band is 703MHz~748MHz, and the frequency range corresponding to the B28 downlink frequency band is 758MHz~803MHz.

[0079] 8. LB, MB, HB

[0080] 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 middle & high frequency band). It should be understood that low frequency, middle frequency, middle and high frequency, and high frequency refer to the relative high and low frequencies, and the frequency band division can be adjusted as needed, and middle and high frequency include middle frequency and high frequency.

[0081] 9. Duplexer (DUP)

[0082] 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 work normally at the same time.

[0083] 10. Low noise amplifier (LNA)

[0084] In the field of communications, a low-noise amplifier refers to an amplifier with a very low noise factor, which is used as a high-frequency or intermediate-frequency preamplifier for various types of radio receivers, as well as an amplification circuit for high-sensitivity electronic detection equipment.

[0085] 11. Surface acoustic wave (SAW)

[0086] In the field of communications, a surface acoustic wave filter refers to a filter that uses surface acoustic waves to filter noise. It is used to convert the input signal of the radio wave into mechanical energy using input and output transducers. After processing, the mechanical energy is converted into an electrical signal to filter out unnecessary signals and noise.

[0087] The above is a brief introduction to the terms involved in the embodiments of the present application, which will not be repeated below.

[0088] Figure 1 The present invention is a schematic diagram of a scenario of a mobile communication system to which an embodiment of the present application is applicable.

[0089] like Figure 1 As shown, the electronic device 100 in the mobile communication system can transmit and receive with network devices of multiple standards at the same time. For example, the mobile communication system may include an electronic device 100, an LTE base station 200, and an NR base station 300, and the electronic device 100 can communicate with the LTE base station 200 and the NR base station 200 at the same time. Among them, the LTE base station 200 and the NR base station 200 are network devices of two standards.

[0090] The embodiment of the present application does not specifically limit the type of the electronic device 100. In some embodiments, the electronic device 100 can be a mobile phone, a wearable device (such as a smart bracelet, a smart watch, a headset, etc.), a tablet computer, a laptop computer, a handheld computer, a notebook computer, an ultra-mobile personal computer (ultra-mobile personal computer, UMPC), a cellular phone, a personal digital assistant (personal digital assistant, PDA), an augmented reality (Augmented reality, AR)\virtual reality (virtual reality, VR) device and other IOT (Internet of Things) devices, and can also be a television, a large screen, a printer, a projector and other devices. For ease of understanding, the following embodiments are exemplified by taking the electronic device 100 as a mobile phone as an example.

[0091] Figure 2 A schematic diagram of the structure of an electronic device provided in an embodiment of the present application.

[0092] like Figure 2As shown, the electronic device 100 may include a baseband subsystem 10, a radio frequency subsystem 20 composed of a radio frequency transceiver chip (radio frequency integrated circuit, RFIC) 21 and a radio frequency front end module (radio frequency front end, RFFE) 22, an antenna (antenna, ANT) subsystem 30, a power subsystem 40, etc. These devices can be coupled through various interconnection buses or other electrical connection methods.

[0093] 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 or control information such as voice, text, video, etc. 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 may include multiple processing cores or multiple hardware accelerators (HAC) at the same time. The baseband subsystem 10 can be integrated into one or more chips.

[0094] Exemplarily, the baseband subsystem 10 can be used as 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 in a system on chip (system on chip technology, SOC) chip, which can be 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 through the network.

[0095] In addition, since the radio frequency signal is an analog signal, the signal processed by the baseband subsystem 10 is mainly a digital signal, and an analog-to-digital converter device is also required in the electronic device. The analog-to-digital converter device may 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 device and the digital-to-analog converter can be set in the baseband subsystem 10, and can be set in the radio frequency subsystem 20, and the embodiment of the present application does not impose any restrictions on this.

[0096] 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 devices such as RF switches, duplexers, antenna tuners, low noise amplifiers (LNA), power amplifiers, mixers, local oscillators (LO), filters, etc., which can be integrated into one or more chips as needed. The antenna can sometimes also be considered as part of the RF subsystem 20.

[0097] Exemplarily, the above electronic devices can be separately arranged in the antenna, the RF front-end module 22 and the RF transceiver chip 21 as needed. The RF transceiver chip 21 can be composed of devices such as a mixer and a local oscillator. Among them, 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 called a receiver, a transmitter or a transceiver.

[0098] The RF front-end module 22 can be composed of electronic devices such as filters, low-noise amplifiers, power amplifiers, and RF switches. The RF switch is used to switch between receiving and transmitting RF signals and between different frequency bands; the duplexer is used to isolate the transmitting and receiving paths of the RF signal, thereby ensuring that the receiving and transmitting can work normally when sharing the same antenna; the filter is used to retain the signal within a specific frequency band and filter out the signal outside the characteristic frequency band. The low-noise amplifier is used to amplify the RF signal of the receiving channel; the power amplifier is used to amplify the RF signal of the transmitting path.

[0099] Here, the RF transceiver chip 21 can output control signals to components such as RF switches in the RF front-end module 22 through control lines to control the RF switches to switch between different links.

[0100] 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, and the like.

[0101] 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.

[0102] 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.

[0103] The power subsystem 40 is used to supply power to various devices. For example, the power supply can provide voltage to the power amplifier. The power subsystem 40 may include multiple power supplies, which may be the same or different. The power subsystem 40 may also supply power to the baseband subsystem 10, the radio frequency subsystem 20, and the antenna subsystem 30. The same power supply may be used to supply power to each subsystem, or different power supplies may be used to supply power to each subsystem.

[0104] In addition, the electronic device 100 may also include an application subsystem, which may serve as the main control system or main computing system of the electronic device 100, for running a 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, etc.

[0105] It should be understood that the above is only an example of the structure of the electronic device 100, and the electronic device 100 may also include other subsystems or devices, which can be configured and modified as needed, and the embodiments of the present application do not impose any limitations on this.

[0106] At present, 5G with higher transmission efficiency is widely used. The 5G networking mode includes two modes: 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 4G base stations and 5G base stations simultaneously. According to the different roles played by these two base stations, namely the 4G base station and the 5G base station, the DC architecture in the NSA mode can be divided into three architectures: ENDC, NR-EUTRA Dual-Connection (NEDC), and NGEN-DC (NG-RAN E-UTRA-NR Dual-Connectivity). 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. Exemplarily, in an embodiment provided in the present application, two radio frequency signals of different frequency bands in the ENDC scenario can be formed by a 4G signal and a 5G signal.

[0107] Figure 3 It is a schematic structural diagram of a radio frequency front-end module provided in an embodiment of the present application.

[0108] In an embodiment provided in the present application, taking the ENDC architecture of LB1+LB2 in the NSA mode supported by the electronic device 100 as an example. As Figure 3 shown, the signals transmitted between the radio frequency transceiver chip 21 and the radio frequency front-end module 22 may include: LB1 transmit signal, LB1 receive signal, LB2 transmit signal, LB2 receive signal. Among them, the LB1 transmit signal refers to a transmit signal with a frequency in the corresponding frequency band of LB, and the LB1 receive signal refers to a receive signal with a frequency in the corresponding frequency band of LB; the LB2 transmit signal refers to another transmit signal with a frequency in the corresponding frequency band of LB, and the LB1 receive signal refers to another receive signal with a frequency in the corresponding frequency band of LB. Among them, the LB1 signal and the LB2 signal are in different low-frequency bands. For example, the ENDC architecture of n28+B20, or the ENDC architecture of B28+n20, etc. The radio frequency 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.

[0109] 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.

[0110] At the same time, the path between the external antenna and the second frequency band isolation component is connected 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, wherein the second frequency band isolation component can be a second duplexer for isolating the transmission signal of LB2 and the reception signal of LB1 signal and LB2 signal. 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 cause high losses in the transmission process of the LB2 frequency band radio frequency signal and the reception process of the LB1 frequency band and LB2 frequency band radio frequency signal, thereby affecting the network transmission efficiency of the LB1 signal and the LB2 signal.

[0111] 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 passing through the antenna switching switch will make the loss of the transmission process of the radio frequency signal in the LB1 frequency band and the reception process of the radio frequency signals in the LB1 frequency band and the LB2 frequency band lower. Similarly, only through the antenna switching switch control conduction of the path between the external antenna and the second frequency band isolation component, 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 passing through the antenna switching switch will make the loss of the transmission process of the radio frequency signal in the LB2 frequency band and the reception process of the radio frequency signals in the LB1 frequency band and the LB2 frequency band lower, thereby effectively improving the network transmission efficiency of the LB1 signal and the LB2 signal.

[0112] Combine the following Figures 4 to 6 , for the RF front-end module of ENDC architecture of LB1+LB2 in NSA mode, the problem of high loss due to the large number of electronic devices and wires is introduced in detail.

[0113] Figure 4 A schematic diagram of the structure of a radio frequency front-end module provided in an embodiment of the present application.

[0114] In an 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. Among them, 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.

[0115] The diversity module 222 includes an antenna selection switch 2221, one end of which is connected to the antenna switching switch 2211 in the main collection module 221 through the wiring of the printed circuit boards (PCB), and the other end of the antenna selection switch 2221 is connected to the second RF isolation component 2225. The second RF isolation component 2225 is used to isolate 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. In this structure, the path loss between the second RF isolation component 2225 and the antenna subsystem 30 at least includes: the antenna switching switch 2211, the PCB wiring, and the antenna selection switch 2221.

[0116] For example, Figure 5 A circuit diagram of a radio frequency front-end module provided in an embodiment of the present application.

[0117] In an embodiment provided in the present application, the electronic device 100 supports the ENDC architecture of n28+B20 in NSA mode as an example. Figure 5 As shown, in the embodiment of the present application, the RF front-end module 22 includes a main module 221 and a diversity module 222, and the main module 221 is connected to the first antenna ANT1 and the second antenna ANT2 respectively. The main 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, 2217, a RF switch 2216, and an n28Tx+B20 / n28Rx duplexer 2218.

[0118] The antenna switching switch 2211 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 antenna selection switch 2212 or the path between the first antenna ANT1 and the diversity module 222, or switch the path between the second antenna ANT2 and the antenna selection switch 2212 or the path between the second antenna ANT2 and the diversity module 222. The antenna selection switch 2212 is connected to the antenna switching switch 2211, and is used to select one or more RF channels to be turned on, that is, to turn on or off the antenna switching switch 2211 and one or more channels of the B20 duplexer 2213, the B28 duplexer 2214, or the n28Tx+B20 / n28PRx duplexer 2218.

[0119] The B20 duplexer 2213 is connected to the antenna selection switch 2212 and is used to filter and conduct the received signal of the B20 frequency band through the internal receiving path. The B28 duplexer 2214 is connected to the antenna selection switch 2212 and is used to filter and conduct the received signal of the B28 frequency band through the internal receiving path. The low noise amplifiers 2215 and 2217 are respectively connected to the B20 duplexer 2213 and the B28 duplexer 2214 and are used to perform low noise amplification on the received signal of the B20 frequency band and the received signal of the B28 frequency band, respectively, to remove noise and amplify the radio frequency 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.

[0120] The n28Tx+B20 / n28PRx duplexer 2218 is connected to the antenna selection switch 2212, and is used to conduct the transmission signal of the n28 frequency band through the internal transmission path, and conduct the reception signal of the B20 frequency band and the n28 frequency band through the internal reception path. In addition, the n28Tx+B20 / n28PRx duplexer 2218 is located outside the main module 221, and is connected to a moving contact of the antenna selection switch 2212 through the TX_IN1 interface of the main module 221, and is connected to the RF switch 2216 through the LNA_AUX_IN1 interface of the main module 221.

[0121] It is understandable that the first antenna ANT1 and the second antenna ANT2 can be used as 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 independently complete the functions of transmitting and receiving signals, and at the same time serve as backup antennas for each other to prevent the transmission and reception of RF signals from being affected when a certain antenna fails or is blocked.

[0122] Figure 6 This is a signal trend diagram of a radio frequency front-end module provided in an embodiment of the present application.

[0123] like Figure 6 As shown by the dotted line between the first antenna ANT1 and the n28Tx+B20 / n28PRx duplexer 2218, for example, taking the ENDC scenario of the n28 signal+B20 signal as an example, when the transmission signal of the n28 frequency band needs to be sent to the space through the main module 221, the transmission signal of the n28 frequency band enters the antenna selection switch 2212 through the transmission channel in the n28Tx+B20 / n28PRx duplexer 2218. The antenna selection switch 2212 selects to conduct the path between the n28Tx+B20 / n28PRx duplexer 2218 and the antenna switching switch 2211, so that the transmission signal of the n28 frequency band enters the antenna switching switch 2211 through the antenna selection switch 2212. The antenna switching switch 2211 conducts the path between the antenna selection switch 2212 and the first antenna ANT1, so that the transmission signal of the n28 frequency band is transmitted from the first antenna ANT1 to the space.

[0124] When it is necessary to simultaneously receive the reception signal of the n28 frequency band and the reception signal of the B20 frequency band through the main set module 221, the reception signal of the n28 frequency band and the reception signal of the B20 frequency band are received from the first antenna ANT1. The antenna switching switch 2211 conducts the path between the first antenna ANT1 and the antenna selection switch 2212, so that the reception signal of the n28 frequency band and the reception signal of the B20 frequency band are sent to the antenna selection switch 2212 through the antenna switching switch 2211. The antenna selection switch 2212 conducts the path between the antenna switching switch 2211 and the n28Tx+B20 / n28PRx duplexer 2218, so that the reception signal of the n28 frequency band and the reception signal of the B20 frequency band are sent to the RF switch 2216 through the antenna selection switch 2212 and the n28Tx+B20 / n28PRx duplexer 2218.

[0125] The RF switch 2216 selects to conduct the path between the n28Tx+B20 / n28PRx duplexer 2218 and the low noise amplifier 2217, so that the received signal of the n28 band and the received signal of the B20 band are sent to the low noise amplifier 2217. The low noise amplifier 2217 performs low noise amplification on the received signal of the n28 band and the received signal of the B20 band to obtain the received signal of the n28 band and the received signal of the B20 band after noise is removed.

[0126] 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 wirings, 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.

[0127] like Figure 5 As shown, in the embodiment of the present application, the diversity module 222 includes an antenna selection switch 2221, a B20+B28 SAW filter 2222, a RF 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 module 221, and is used to select one or more RF channels to be turned on, that is, to turn on or off the antenna switching switch 2211 and one or more channels of the B20+B28 SAW filter 2222 and the B20Tx+B20 / n28DRx duplexer 2225.

[0128] The B20+B28 SAW filter 2222 is connected to the antenna selection switch 2221 and is used to filter the B20 signal or the B28 signal. The RF switch 2223 is connected to the B20+B28 SAW filter 2222 and is used to select the path between the low noise amplifier 2224 and the B20+B28 SAW filter 2222, or the path between the low noise amplifier 2224 and the B20Tx+B20 / n28DRx duplexer 2225. The low noise amplifier 2224 is connected to the RF switch 2223 and is used to perform low noise amplification on the received signals of the B20 frequency band and the n28 frequency band to remove noise and amplify the RF signal.

[0129] The B20Tx+B20 / n28DRx duplexer 2225 is connected to the antenna switching switch 2211 and the RF switch 2223, respectively, and is used to conduct the transmission signal of the B20 band through the internal transmission path, and conduct the reception signal of the B20 band and the n28 band through the internal reception path. In addition, the B20Tx+B20 / n28DRx duplexer 2225 is located outside the diversity module 222, connected to a moving contact of the antenna selection switch 2221 through the TX_IN2 interface of the diversity module 222, and connected to the RF switch 2223 through the LNA_AUX_IN2 interface of the diversity module 222. At the same time, the antenna selection switch 2221 is connected to the DRX_IN interface of the main collection module 221 through the ANT3 interface and routing of the diversity module 222.

[0130] like Figure 6 As shown by the dotted line between the second antenna ANT2 and the B20Tx+B20 / n28DRx duplexer 2225, for example, taking the ENDC scenario of n28 signal+B20 signal as an example, when the transmission signal of the B20 frequency band needs to be radiated to space through the diversity module 222, the transmission signal of the B20 frequency band enters the antenna selection switch 2221 through the transmission channel in the B20Tx+B20 / n28DRx duplexer 2225. The antenna selection switch 2212 selects to conduct the path between the B20Tx+B20 / n28DRx duplexer 2225 and the antenna selection switch 2221, so that the transmission signal of the n28 frequency band enters the antenna switching switch 2211 through the routing and the antenna selection switch 2221. The antenna switching switch 2211 conducts the path between the antenna selection switch 2221 and the second antenna ANT2, so that the transmission signal of the B20 frequency band is radiated from the second antenna ANT2 to space.

[0131] When it is necessary to simultaneously receive the received signal of the n28 band and the received signal of the B20 band through the diversity module 222, the received signal of the n28 band and the received signal of the B20 band are received from the second antenna ANT2. The antenna switching switch 2211 conducts the path between the second antenna ANT2 and the antenna selection switch 2221, so that the received signal of the n28 band and the received signal of the B20 band are sent to the antenna selection switch 2221 in the diversity module 222 through the antenna switching switch 2211 in the main collection module 221. The antenna selection switch 2221 conducts the path between the antenna switching switch 2211 and the B20Tx+B20 / n28DRx duplexer 2225, so that the received signal of the n28 band and the received signal of the B20 band are sent to the RF switch 2223 through the antenna selection switch 2221 and the B20Tx+B20 / n28DRx duplexer 2225.

[0132] The RF switch 2223 selects to conduct the path between the B20Tx+B20 / n28DRx duplexer 2225 and the low noise amplifier 2224, so that the received signal of the n28 band and the received signal of the B20 band are sent to the low noise amplifier 2224. The low noise amplifier 2224 performs low noise amplification on the received signal of the n28 band and the received signal of the B20 band to obtain the received signal of the n28 band and the received signal of the B20 band after noise is removed.

[0133] Therefore, in the ENDC scenario of n28 signal + B20 signal, 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, exemplarily, a typical value may be 0.25dB, 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, exemplarily, a typical value may be at least 0.25dB or more. The loss of the antenna selection switch 2221, exemplarily, a typical value may be 0.3dB. The entire signal transmission process involves many electronic devices and wiring, resulting in high losses, 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.

[0134] 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 the network transmission efficiency.

[0135] Combine the following Figures 7 to 15 , for the RF front-end module of the ENDC architecture of LB1+LB2 in the NSA mode, a solution for reducing the electronic devices or wiring between the antenna subsystem 30 and the first RF isolation component 2218 or the second RF isolation component 2225 is introduced in detail.

[0136] Figure 7 A schematic diagram of the structure of a radio frequency front-end module provided in yet another embodiment of the present application.

[0137] In another embodiment provided in the present application, the RF front-end module 22 includes a main module 223, 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 the first RF isolation component 2232 and the second RF isolation component 2233. Among them, the first RF isolation component 2232 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. The second RF isolation component 2233 is used to isolate 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. In this structure, the path loss between the first RF isolation component 2232 and the antenna subsystem 30 at least includes: the antenna switching switch 2231. The path loss between the second RF isolation component 2233 and the antenna subsystem 30 at least includes: the antenna switching switch 2231.

[0138] Therefore, compared to Figure 4 The structure of the RF front-end module in the embodiment of the present application reduces the electronic devices in the path between the first RF isolation component 2232 and the antenna subsystem 30, and reduces the electronic devices and PCB routing in the path between the second RF isolation component 2233 and the antenna subsystem 30, 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.

[0139] Figure 8 A schematic diagram of the structure of a radio frequency front-end module provided in yet another embodiment of the present application.

[0140] Alternatively, if Figure 8 As shown, in the embodiment of the present application, the antenna switching switch 2231 in the RF front-end module 22 can also be set outside the main module 221 to facilitate later updates and maintenance.

[0141] Fig. 9 A schematic diagram of the structure of a radio frequency front-end module provided in yet another embodiment of the present application.

[0142] Optionally, in the embodiment of the present application, the first RF isolation component 2232 and the second RF isolation component 2233 may also be arranged 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 integrated in 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, and the overall integration of the RF front-end module can be improved.

[0143] Fig.10 A schematic diagram of the structure 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, according to actual wiring requirements, the first RF isolation component 2232 can also be set inside the main module 223, and the second RF isolation component 2233 can be set outside the main module 223. When the lead distance between the first RF isolation component 2232 and the antenna switching switch 2231 is shortened, the loss can also be reduced, and the overall integration of the RF front-end module can be improved.

[0145] Fig.11 A schematic diagram of the structure 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, according to actual wiring requirements, the second RF isolation component 2233 can also be set inside the main module 223, and the first RF isolation component 2232 can be set outside the main module 223. When the lead distance between the second RF isolation component 2233 and the antenna switching switch 2231 is shortened, the loss can also be reduced, and the overall integration of the RF front-end module can be improved.

[0147] Fig.12 A schematic diagram of the structure of a radio frequency front-end module provided in yet another embodiment of the present application.

[0148] Alternatively, if Fig.12 As shown, based on Figure 7 As shown in the structural diagram of the RF front-end module, in the embodiment of the present application, the RF front-end module 22 also includes a diversity module 224, and 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 through the wiring of the printed circuit boards (PCB). In this structure, the diversity module 224 does not assume the dual connection function of the RF signals of the two frequency bands.

[0149] Fig.13 A schematic diagram of the structure of a radio frequency front-end module provided in yet another embodiment of the present application.

[0150] Alternatively, if Fig.13 As shown, in the embodiment of the present application, the antenna switching switch 2231 in the RF front-end module 22 can also be set outside the main module 221 to facilitate later updates and maintenance.

[0151] Fig.14 This is a circuit diagram of a radio frequency front-end module provided in yet another embodiment of the present application.

[0152] like Fig.14 As shown, in one implementation of the embodiment of the present application, the RF front-end module 22 includes a main set module 223 and a diversity module 224, and the main set 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 arranged inside the main set module 223 and is respectively connected to the first antenna ANT1 and the second antenna ANT2 through two interfaces (i.e., the ANT1 interface and the ANT2 interface), 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.

[0153] The n28Tx+B20 / n28Rx duplexer 2232 is arranged outside the main module 223, connected to the antenna switching switch 2231 through the TX_IN1 interface, and used to conduct the transmission signal of the n28 frequency band through the internal transmission path, and conduct the reception signal of the B20 frequency band and the n28 frequency band through the internal reception path. The B20Tx+B20 / n28Rx duplexer 2233 is arranged outside the main module 223, connected to the antenna switching switch 2231 through the TX_IN2 interface, and used to conduct the transmission signal of the B20 frequency band through the internal transmission path, and conduct the reception signal of the B20 frequency band and the n28 frequency band through the internal reception path.

[0154] It should be noted that the antenna switching switch 2231 can also be set outside the main module 223 to separate the antenna switching switch 2231 from the main module 223, so as to facilitate the later updating and maintenance of the antenna switching switch 2231. The connection method of other electronic components is the same as the above embodiment.

[0155] Fig.15 This is a signal trend diagram of a radio frequency front-end module provided in yet another embodiment of the present application.

[0156] like Fig.15As shown by the dotted line between the first antenna ANT1 and the n28Tx+B20 / n28Rx duplexer 2232 in the figure, 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 send the transmission signal of the n28 frequency band to the 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, so that the transmission signal of the n28 frequency band is radiated from the first antenna ANT1 to the space.

[0157] Exemplarily, in another embodiment of the present application, when it is necessary to simultaneously receive the reception signal of the n28 band and the reception signal of the B20 band through the main set module 223, the reception signal of the n28 band and the reception signal of the B20 band are received from the first antenna ANT1. The antenna switching switch 2231 conducts the path between the first antenna ANT1 and the n28Tx+B20 / n28Rx duplexer 2232, so that the reception signal of the n28 band and the reception signal of the B20 band are sent to the n28Tx+B20 / n28Rx duplexer 2232 through the antenna switching switch 2231, and the reception signals of the two bands of the n28 band and the N20 band are obtained.

[0158] Exemplarily, in another embodiment of the present application, when it is necessary to transmit the transmission signal of the B20 frequency band to space through the main set module 223, the transmission signal of the B20 frequency band enters the antenna selection switch 2231 through the transmission channel in 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, so that the transmission signal of the B20 frequency band is transmitted from the second antenna ANT2 to space.

[0159] Exemplarily, in another embodiment of the present application, when it is necessary to simultaneously receive the reception signal of the n28 band and the reception signal of the B20 band through the main set module 223, the reception signal of the n28 band and the reception signal of the B20 band are received from the second antenna ANT2. The antenna switching switch 2231 conducts the path between the second antenna ANT2 and the B20Tx+B20 / n28Rx duplexer 2233, so that the reception signal of the n28 band and the reception signal of the B20 band are sent to the B20Tx+B20 / n28Rx duplexer 2233 through the antenna switching switch 2231, and the reception signals of the n28 band and the N20 band are obtained.

[0160] Therefore, in the ENDC scenario of the n28 signal + B20 signal of the present application, 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, the typical value can be 0.3dB. Figure 5 , reducing the antenna switch 2212 in the main module 221, thereby reducing the loss of the antenna switch 2212. The loss between the second antenna ANT2 and the B20Tx+B20 / n28Rx duplexer 2233 at least includes: the loss of the antenna switch 2211. For example, the typical value can be 0.3dB. Compared with Figure 5 , reducing the PCB routing between the main module 221 and the diversity module 222 and the antenna switch 2221 in the diversity module 222, thereby reducing the PCB routing loss between the main module 221 and the diversity module 222 and the antenna switch 2221. The entire signal transmission process passes through fewer electronic devices and routings, with lower losses, and the transmission efficiency, power consumption and receiving sensitivity performance of the terminal product are effectively improved, thereby improving network transmission efficiency.

[0161] like Fig.14 As shown, in another implementation of the embodiment of the present application, the main module 223 also includes an antenna selection switch 2234, a B20 duplexer 2235, a B28 duplexer 2236, radio frequency switches 2237, 2238, and low noise amplifiers 2239, 2240, all of which are arranged inside 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 radio frequency channels to be turned on, that is, to turn on or off the antenna switching switch 2231 and 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 conduct the received signal of the B20 frequency band through the internal receiving path. The B28 duplexer 2236 is connected to the antenna selection switch 2234, and is used to filter and conduct the received signal of the B28 frequency band through the internal receiving path.

[0162] 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.

[0163] The low noise amplifier 2239 is connected to the RF switch 2237 and is used to perform low noise amplification on the received signal of the B20 frequency band and / or the received signal of the n28 frequency band respectively to remove noise and amplify the RF signal. The low noise amplifier 2240 is connected to the RF switch 2238 and is used to perform low noise amplification on the received signal of the B28 frequency band, the received signal of the n28 frequency band and / or the received signal of the B20 frequency band respectively to remove noise and amplify the RF signal. In addition, the RF switch 2237 is connected to the n28Tx+B20 / n28Rx duplexer 2232 via the LNA_AUX_IN1 interface. The RF switch 2238 is connected to the B20Tx+B20 / n28Rx duplexer 2233 via the LNA_AUX_IN2 interface.

[0164] Optionally, in the embodiment of the present application, the B28 duplexer 2236 can also be replaced by a B28a duplexer or an n28 duplexer, and 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 of them can be a 4G signal and the other can be a 5G signal.

[0165] The 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 of which are arranged inside the diversity module 224. The antenna selection switch 2241 is connected to the antenna switching switch 2231, and is used to select one or more radio frequency channels to be turned on, that is, to turn on or off the channel between the antenna switching switch 2231 and the B20+B28 duplexer 2242. The B20+B28 duplexer 2242 is connected to the antenna selection switch 2241, and is used to filter and turn on the B20 signal or the B28 signal through the internal receiving path. The radio frequency switch 2243 is connected to the B20+B28 duplexer 2242, and is used to select and turn on the path between the B20+B28 duplexer 2242 and the low noise amplifier 2244. The low noise amplifier 2244 is connected to the RF switch 2243 and is used to perform low noise amplification on the B20 signal or the B28 signal to remove noise and amplify the RF signal. In addition, the antenna selection switch 2241 is connected to the DRX_IN interface of the main set module 223 through the ANT3 interface of the diversity module 224.

[0166] like Fig.15 As shown, in another embodiment of the present application, when it is necessary to receive a reception signal of the B28 frequency band or a reception signal of the B20 frequency band through the main set module 223, the reception signal of the B28 frequency band or the reception signal of the B20 frequency band is received from the first antenna ANT1. The antenna switching switch 2231 conducts the path between the first antenna ANT1 and the antenna selection switch 2234, so that the reception signal of the B28 frequency band or the reception signal of the B20 frequency band is sent to the antenna selection switch 2234 through the antenna switching switch 2231. The antenna selection switch 2234 conducts the path between the antenna switching switch 2231 and the B20 duplexer 2235 or the B28 duplexer 2236, so that the reception signal of the B20 frequency band is sent to the RF switch 2237 through the antenna selection switch 2234 and the B20 duplexer 2235, or the reception signal of the B28 frequency band is sent to the RF switch 2238 through the antenna selection switch 2234 and the B28 duplexer 2236.

[0167] The RF switch 2237 selects to conduct the path between the B20 duplexer 2235 and the low noise amplifier 2239, so that the received signal of the B20 frequency band is sent to the low noise amplifier 2239. The RF switch 2238 selects to conduct the path between the B28 duplexer 2236 and the low noise amplifier 2240, so that the received signal of the B28 frequency band is sent to the low noise amplifier 2240. The low noise amplifier 2239 performs low noise amplification on the received signal of the B20 frequency band to obtain the received signal of the B20 frequency band after the noise is removed. The low noise amplifier 2240 performs low noise amplification on the received signal of the B28 frequency band to obtain the received signal of the B28 frequency band after the noise is removed.

[0168] like Fig.15 As shown, in another embodiment of the present application, when it is necessary to receive the received signal of the B28 frequency band and the received signal of the B20 frequency band through the diversity module 224, the received signal of the B28 frequency band and the received signal of the B20 frequency band are received from the second antenna ANT2. The antenna switching switch 2231 conducts the path between the second antenna ANT2 and the antenna selection switch 2241, so that the received signal of the B28 frequency band and the received signal of the B20 frequency band are sent to the antenna selection switch 2241 in the diversity module 224 through the antenna switching switch 2231 in the main collection module 223. The antenna selection switch 2241 conducts the path between the antenna switching switch 2231 and the B20+B28 duplexer 2242, so that the received signal of the B28 frequency band and the received signal of the B20 frequency band are sent to the RF switch 2243 through the antenna selection switch 2241 and the B20+B28 duplexer 2242.

[0169] The RF switch 2243 selects to conduct the path between the B20+B28 duplexer 2242 and the low noise amplifier 2244, so that the received signal of the B28 frequency band and the received signal of the B20 frequency band are sent to the low noise amplifier 2244. The low noise amplifier 2244 performs low noise amplification on the received signal of the B28 frequency band and the received signal of the B20 frequency band to obtain the received signal of the B28 frequency band and the received signal of the B20 frequency band after noise is removed.

[0170] Based on the above circuit structure, it can be understood that the antenna switching switch 2231 can select a single pole n throw (SPnT) switch 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 of the two frequency bands.

[0171] Based on the above circuit structure, it can be understood that the antenna switching switch 2231 can also select a double pole n throw (DPnT) switch of a complete or partial path to meet the switching of the first antenna ANT1 and the second antenna ANT2 with 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 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.

[0172] The embodiment of the present application also provides a radio frequency front-end chip, including the radio frequency front-end module 22 as described above.

[0173] The 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 conduction 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 send 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 send the first frequency band RF signal and the second frequency band RF signal.

[0174] Optionally, the electronic device further includes a power subsystem, and the power subsystem is used to provide voltage to the RF front-end module.

[0175] The beneficial effects that can be achieved by the electronic device provided in the above-mentioned embodiment of the present application can refer to the beneficial effects corresponding to the modules provided above, which will not be repeated here.

[0176] It should be understood that the above is only to help those skilled in the art to better understand the embodiments of the present application, rather than to limit the scope of the embodiments of the present application. According to the above examples given, those skilled in the art can obviously make various equivalent modifications or changes. For example, some steps in each embodiment of the above detection method may be unnecessary, or some steps may be newly added. Or a combination of any two or any multiple embodiments of the above. Such modifications, changes or combined schemes also fall within the scope of the embodiments of the present application.

[0177] 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 to each other. For the sake of brevity, they will not be repeated here.

[0178] 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 the present application.

[0179] 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.

[0180] It should also be understood that the division of the methods, 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 methods, categories, situations and embodiments can be combined without contradiction.

[0181] 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.

[0182] Finally, it should be noted that the above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions within the technical scope disclosed in the present application should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A radio frequency front-end module, It is characterized in that include: An antenna switch is configured to switch on or off a path of a radio frequency signal of the first frequency band and / or a path of a radio frequency signal of the second frequency band; 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 radio frequency front-end module according to claim 1, It is 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, It is 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 radio frequency front-end module according to claim 1, It is 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, It is 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, It is 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, It is 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, It is 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, It is 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, It is 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, It is 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, It is 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, It is 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, It is 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, It is 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, It is 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, It is 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, It is characterized in that A radio frequency front-end module comprising any one of claims 1 to 17.

19. An electronic device, It is 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, It is 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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