RF switches, RF front-end modules, RF front-end chips and terminal equipment

Abstract

The present application discloses a radio frequency switch, a radio frequency front-end module, a radio frequency front-end chip and a terminal device, and relates to the technical field of terminal devices. The radio frequency switch includes at least two antenna ports, a transceiver port and a plurality of output ports; one of the at least two antenna ports is electrically connected to the transceiver port and the plurality of output ports, so that the path between the antenna port and the transceiver port and the plurality of output ports flows through the transceiver signal; the other of the at least two antenna ports is electrically connected to the plurality of output ports, so that the path between the antenna port and the plurality of output ports flows through the received signal. Based on the solution of the present application, the area of ​​the radio frequency switch can be reduced and the insertion loss of the radio frequency switch can be optimized.

Description

Technical Field

[0001] The present application relates to the technical field of terminal equipment, and in particular, to a radio frequency switch, a radio frequency front-end module, a radio frequency front-end chip and a terminal equipment. Background Art

[0002] With the development of mobile communication technology, multiple antennas are introduced into terminal devices to provide better user experience and enable terminal devices to work in the best state in various complex environments. Terminal devices generally include RF transceiver modules and RF receiver modules. Multiple antennas are connected to the RF transceiver modules or RF receiver modules respectively, so that the transceiver signals flow through the RF transceiver modules or RF receiver modules respectively.

[0003] At present, the RF switch in the RF receiving module is symmetrically set with two antenna paths, and both antenna paths can support high-power scenarios. However, when the transceiver signal flows through the RF receiving module, one of the antenna paths is often used to flow through the transceiver signal, and the other antenna path only flows through the receiving signal, which makes the RF switch over-designed, resulting in a larger area and larger insertion loss of the RF switch.

[0004] Therefore, a new solution is urgently needed to solve the above problems. Summary of the invention

[0005] The present application provides a radio frequency switch, a radio frequency front-end module, a radio frequency front-end chip and a terminal device, which reduce the over-design of the radio frequency switch, thereby reducing the area of ​​the radio frequency switch and reducing the insertion loss of the radio frequency switch.

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

[0007] In a first aspect, a radio frequency switch is provided, comprising at least two antenna ports, a transceiver port, and a plurality of output ports; one of the at least two antenna ports is electrically connected to the transceiver port and the plurality of output ports so that transceiver signals flow through a path between the antenna port and the transceiver port and the plurality of output ports; another antenna port of the at least two antenna ports is electrically connected to the plurality of output ports so that a received signal flows through a path between the antenna port and the plurality of output ports.

[0008] In an embodiment of the present application, the transceiver port is connected to only one antenna port for a larger-power transceiver signal to flow through, and the other antenna port is connected to only the output port for a smaller-power receive signal to flow through. This can not only meet the signal flow requirements of the RF switch, but also avoid over-design of the RF switch, reduce the area of ​​the RF switch, and reduce the insertion loss of the RF switch.

[0009] In combination with the first aspect, in certain implementations of the first aspect, the at least two antenna ports include a first antenna port and a second antenna port, and the first antenna port and the second antenna port are electrically connected to the multiple output ports, respectively; when the first antenna port is electrically connected to the transceiver port, the second antenna port is in a disconnected state from the transceiver port; when the second antenna port is electrically connected to the transceiver port, the first antenna port is in a disconnected state from the transceiver port.

[0010] In an embodiment of the present application, when one of the two antenna ports is connected to the transceiver port, the other antenna port is disconnected from the transceiver port, so that the transceiver port is connected to only one antenna port, and only one antenna port is required to flow through a high-power transceiver signal, thereby satisfying the signal flow requirements of the RF switch, avoiding over-design of the RF switch, reducing the area of ​​the RF switch, and reducing the insertion loss of the RF switch.

[0011] In combination with the first aspect, in certain implementations of the first aspect, when the first antenna port is electrically connected to the transceiver port, the path between the first antenna port and the transceiver port and the multiple output ports supports signals of a first power, and the path between the second antenna port and the multiple output ports supports signals of a second power, and the first power is greater than the second power.

[0012] In the embodiment of the present application, the first antenna port is connected to the transceiver port and the multiple output ports, so that the first antenna port supports a relatively high-power transceiver signal between the transceiver port and the multiple output ports, and correspondingly, relatively more switch devices can be set to prevent the transceiver signal from causing a large current impact on other electronic devices. The second antenna port is only connected to the multiple output ports, so that the second antenna port supports a relatively low-power receive signal between the multiple output ports, and correspondingly, relatively fewer switch devices can be set to prevent the receive signal from causing a small current impact on other electronic devices.

[0013] In combination with the first aspect, in certain implementations of the first aspect, n series switching devices are set between the first antenna port and the multiple output ports, and m series switching devices are set between the second antenna port and the multiple output ports; wherein n>m, and n and m are both positive integers.

[0014] In this implementation, n series-connected switch devices are provided between the first antenna port and the multiple output ports, so that the n series-connected switch devices support the transmission and reception signals with relatively high power flowing between the first antenna port and the multiple output ports. M series-connected switch devices are provided between the second antenna port and the multiple output ports, so that the m series-connected switch devices support the reception signals with relatively low power flowing between the second antenna port and the multiple output ports.

[0015] Optionally, the switch device may be a metal oxide semiconductor field effect transistor (MOS transistor).

[0016] Optionally, n may be 12 and m may be 4 according to the power of the current actually flowing through the path.

[0017] In combination with the first aspect, in some implementations of the first aspect, n series-connected switch devices are arranged between the first antenna port and the transceiver port.

[0018] In this implementation, n series-connected switch devices are provided between the first antenna port and the transceiver port, thereby supporting a relatively high-power transceiver signal flowing between the first antenna port and the transceiver port through the n series-connected switch devices.

[0019] In combination with the first aspect, in some implementations of the first aspect, m series-connected switch devices are arranged between the first antenna port and the transceiver port.

[0020] In this implementation, since all the switching devices are opened when the transmit signal flows through the transceiver port and the first antenna port, the impact on the current flowing through the path is small, m switching devices connected in series can also be set between the first antenna port and the transceiver port.

[0021] In combination with the first aspect, in some implementations of the first aspect, n series-connected switch devices are further arranged between the path between the transceiver port and the first antenna port and the ground terminal.

[0022] In this implementation, n series-connected switch devices are provided between the transceiver port and the ground terminal, thereby preventing the high-power current flowing through the transceiver port from impacting other electronic devices.

[0023] In combination with the first aspect, in some implementations of the first aspect, n series-connected switch devices are further arranged between the path between the multiple output ports and the first antenna port and the ground terminal.

[0024] In this implementation, n series-connected switching devices are arranged between the path between the multiple output ports and the first antenna port and the ground terminal, so as to prevent the high-power current flowing through the first antenna port from causing impact on other electronic devices.

[0025] In combination with the first aspect, in some implementations of the first aspect, m series-connected switch devices are further arranged between the path between the multiple output ports and the second antenna port and the ground terminal.

[0026] In this implementation, m series switching devices are provided between the path between the plurality of output ports and the second antenna port and the ground terminal, thereby preventing the low-power current flowing through the second antenna port from impacting other electronic devices.

[0027] In combination with the first aspect, in some implementations of the first aspect, a first common path and a plurality of first branches are provided between the first antenna port and the plurality of output ports, and the first antenna port is electrically connected to the plurality of output ports respectively through the first common path and the plurality of first branches;

[0028] The first common path is provided with k switching devices connected in series, and the first branch is provided with m switching devices connected in series; wherein n=k+m, and k is a positive integer.

[0029] Optionally, k may be 8 according to the power of the current actually flowing through the path.

[0030] In the embodiment of the present application, k series-connected switch devices are shared between the multiple output ports and the first antenna port, thereby further saving the amount of switch devices and reducing the area of ​​the radio frequency switch.

[0031] In combination with the first aspect, in certain implementations of the first aspect, when the second antenna port is electrically connected to the transceiver port, the path between the second antenna port and the transceiver port and the multiple output ports supports signals of a third power, the path between the second antenna port and the multiple output ports supports signals of a fourth power, and the third power is greater than the fourth power.

[0032] In the embodiment of the present application, the second antenna port is connected to the transceiver port and the multiple output ports, so that the second antenna port supports a relatively high-power transceiver signal between the transceiver port and the multiple output ports, and correspondingly, relatively more switch devices can be set to prevent the transceiver signal from causing a large current impact on other electronic devices. The first antenna port is only connected to the multiple output ports, so that the first antenna port supports a relatively low-power receive signal between the multiple output ports, and correspondingly, relatively fewer switch devices can be set to prevent the receive signal from causing a small current impact on other electronic devices.

[0033] In combination with the first aspect, in certain implementations of the first aspect, a series-connected switching devices are set between the second antenna port and the multiple output ports, and b series-connected switching devices are set between the second antenna port and the multiple output ports; wherein a>b, and a and b are both positive integers.

[0034] In this implementation, a series of switch devices are provided between the second antenna port and the multiple output ports, so that the a series of switch devices support the transmission and reception signals with relatively high power flowing between the second antenna port and the multiple output ports. B series of switch devices are provided between the first antenna port and the multiple output ports, so that the b series of switch devices support the reception signals with relatively low power flowing between the first antenna port and the multiple output ports.

[0035] Optionally, a may be 12 and b may be 4 according to the power of the current actually flowing through the path.

[0036] In combination with the first aspect, in some implementations of the first aspect, a series switching devices are arranged between the second antenna port and the transceiver port.

[0037] In this implementation, a series-connected switch devices are provided between the second antenna port and the transceiver port, thereby supporting a relatively high-power transceiver signal to flow between the second antenna port and the transceiver port through the a series-connected switch devices.

[0038] In combination with the first aspect, in some implementations of the first aspect, b series-connected switch devices are arranged between the second antenna port and the transceiver port.

[0039] In this implementation, since all the switch devices are opened when the transmit signal flows through the transceiver port and the second antenna port, the impact on the current flowing through the path is small, b series switch devices can also be set between the second antenna port and the transceiver port.

[0040] In combination with the first aspect, in some implementations of the first aspect, a series switch device is further provided between the path between the transceiver port and the second antenna port and the ground terminal.

[0041] In this implementation, a series of switch devices are provided between the transceiver port and the ground terminal, thereby preventing the high-power current flowing through the transceiver port from impacting other electronic devices.

[0042] In combination with the first aspect, in some implementations of the first aspect, a series switching device is further provided between the path between the multiple output ports and the second antenna port and the ground terminal.

[0043] In this implementation, a series of switch devices are provided between the path between the plurality of output ports and the second antenna port and the ground terminal, thereby preventing the high-power current flowing through the second antenna port from impacting other electronic devices.

[0044] In combination with the first aspect, in some implementations of the first aspect, b series-connected switching devices are further arranged between the path between the multiple output ports and the first antenna port and the ground terminal.

[0045] In this implementation, b series-connected switching devices are provided between the path between the multiple output ports and the first antenna port and the ground terminal, thereby preventing the low-power current flowing through the first antenna port from causing impact on other electronic devices.

[0046] In combination with the first aspect, in some implementations of the first aspect, a second common path and a plurality of second branches are provided between the second antenna port and the plurality of output ports, and the second antenna port is electrically connected to the plurality of output ports respectively through the second common path and the plurality of second branches;

[0047] The second common path is provided with c switching devices connected in series, and the second branch is provided with b switching devices connected in series; wherein a=b+c, ​​and c is a positive integer.

[0048] In the embodiment of the present application, c series-connected switch devices are shared between the plurality of output ports and the second antenna port, thereby further saving the amount of switch devices used and reducing the area of ​​the radio frequency switch.

[0049] In a second aspect, a radio frequency front-end module is provided, comprising the radio frequency switch.

[0050] In an embodiment of the present application, an RF switch is arranged in an RF front-end module, and the transceiver port in the RF switch is connected to only one antenna port for a larger-power transceiver signal to flow through, and the other antenna port is connected to only the output port for a smaller-power receive signal to flow through. This can not only meet the signal flow requirements of the RF switch, but also avoid over-design of the RF switch, reduce the area of ​​the RF switch, and reduce the insertion loss of the RF switch.

[0051] In a third aspect, a radio frequency front-end chip is provided, comprising the above-mentioned radio frequency front-end module.

[0052] In an embodiment of the present application, the RF front-end module is integrated into the RF front-end chip, and the transceiver port in the RF front-end module is connected to only one antenna port for transmitting and receiving signals with higher power, and the other antenna port is connected to only the output port for receiving signals with lower power. This can not only meet the signal flow requirements of the RF switch, but also avoid over-design of the RF switch, reduce the area of ​​the RF switch, and reduce the insertion loss of the RF switch.

[0053] In a fourth aspect, a terminal device is provided, comprising the radio frequency front-end chip, the radio frequency transceiver chip and the antenna subsystem;

[0054] The antenna subsystem includes a plurality of antennas, and the plurality of antennas are electrically connected to the at least two antenna ports respectively, so as to receive signals from space or transmit signals to space;

[0055] The radio frequency transceiver chip is electrically connected to the transceiver port and the multiple output ports respectively, so as to receive signals and transmit signals from the transceiver port, and receive signals from the multiple output ports.

[0056] In an embodiment of the present application, the RF front-end chip is arranged in the terminal device, and the transceiver port in the RF front-end chip is connected to only one antenna port for passing a larger-power transceiver signal, and the other antenna port is connected to only the output port for passing a smaller-power receive signal. This can not only meet the signal flow requirements of the RF switch, but also avoid over-design of the RF switch, reduce the area of ​​the RF switch, and reduce the insertion loss of the RF switch. BRIEF DESCRIPTION OF THE DRAWINGS

[0057] Figure 1 A schematic diagram of a scenario of a mobile communication system to which an embodiment of the present application is applicable;

[0058] Figure 2 A schematic diagram of the structure of a terminal device provided in an embodiment of the present application;

[0059] 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;

[0060] Figure 4 A circuit diagram of a radio frequency front-end module provided in an embodiment of the present application;

[0061] Figure 5 A signal trend diagram of a radio frequency front-end module provided in an embodiment of the present application;

[0062] Figure 6 A circuit diagram of a radio frequency receiving module provided in an embodiment of the present application;

[0063] Figure 7 A schematic diagram of the structure of a radio frequency switch provided in an embodiment of the present application;

[0064] Figure 8 A circuit diagram of a radio frequency switch provided in an embodiment of the present application;

[0065] Fig. 9 A diagram showing a structural change of a radio frequency switch provided in an embodiment of the present application;

[0066] Fig.10 A schematic diagram of the structure of a radio frequency switch provided in another embodiment of the present application;

[0067] Fig.11 A schematic diagram of the structure of a radio frequency switch provided in another embodiment of the present application;

[0068] Fig.12 A circuit diagram of a radio frequency switch provided in yet another embodiment of the present application;

[0069] Fig.13 A circuit diagram of a radio frequency switch provided in yet another embodiment of the present application;

[0070] Fig.14 A circuit diagram of a radio frequency switch provided in yet another embodiment of the present application;

[0071] Fig.15 A circuit diagram of a radio frequency switch provided in yet another embodiment of the present application;

[0072] Fig.16 A circuit diagram of a radio frequency switch provided in yet another embodiment of the present application;

[0073] Fig.17 This is a circuit diagram of a radio frequency switch provided in yet another embodiment of the present application. DETAILED DESCRIPTION

[0074] 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.

[0075] 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.

[0076] 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.

[0077] 1. Radio frequency front end (RFFE)

[0078] 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 reception and transmission of the terminal equipment.

[0079] 2. Power amplifier module with integrated low noise amplifier (LNA), filter and duplexer (LNA and power amplifier module with integrated duplexer, LPAMiD)

[0080] In order to reduce the area occupied by the RF front end, the low noise amplifier (LNA), power amplifier (PA), filter, duplexer and RF switch are integrated into one chip to form LPAMiD.

[0081] 3. RF front-end module (LNA Front End Module, LFEM) with integrated low noise amplifier (LNA), filter and RF switch (RFswitch)

[0082] In order to reduce the area occupied by the RF front end, a low noise amplifier (LNA), filter and RF switch are integrated into one chip to form an LFEM.

[0083] 4. Transmit (TX)

[0084] In the field of communications, transmission refers to the act of sending data from one device to another device or a group of devices.

[0085] 5. Receive (Receive, RX)

[0086] In the field of communications, reception refers to the process of converting transmitted signals into perceptible information.

[0087] 6. LB, MB, HB

[0088] In the field of communications, LB refers to low frequency band (LB), generally refers to the frequency of 617 ~ 960MHz; MB refers to middle frequency band (MB), generally refers to the frequency of 1710 ~ 2200MHz; HB refers to high frequency band (HB), generally refers to the frequency of 2300 ~ 2690MHz; MHB refers to middle and high frequency band (MHB middle & high frequency band), that is, middle and high frequency include middle frequency and high frequency. It should be understood that low frequency, middle frequency, middle and high frequency, and high frequency refer to the relative height of frequency, and the frequency band division can be adjusted as needed.

[0089] 7. Double Pole X Throw (DPXT)

[0090] A double-pole x-throw switch is a switching switch consisting of two moving ends and multiple fixed ends, which is used to control the connection between the power supply at the moving end and the electrical equipment at the fixed end.

[0091] 8. Multiple input multiple output (MIMO)

[0092] In the field of communications, MIMO refers to a communication system that uses multiple antennas at the transmitting and receiving ends simultaneously, which exponentially increases the capacity and spectrum utilization of the communication system without increasing the bandwidth.

[0093] 9. Voltage standing wave ratio (VSWR)

[0094] Voltage standing wave ratio refers to the ratio of standing wave antinode voltage to node voltage amplitude, also known as standing wave coefficient or standing wave ratio. When the standing wave ratio is equal to 1, it means that the impedance of the feeder and the antenna is completely matched. At this time, all high-frequency energy is radiated by the antenna without energy reflection loss; when the standing wave ratio is infinite, it means total reflection and no energy is radiated.

[0095] The above is a brief introduction to the nouns involved in the embodiments of the present application, which will not be repeated below.

[0096] 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.

[0097] like Figure 1 As shown, the user can use the terminal device 100 to communicate with the base station 200. The embodiment of the present application does not specifically limit the type of the terminal device 100. In some embodiments, the terminal 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 (laptop), 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, 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 terminal device 100 as a mobile phone as an example.

[0098] Figure 2 A schematic diagram of the structure of a terminal device provided in an embodiment of the present application.

[0099] like Figure 2 As shown, the terminal 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, as well as 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.

[0100] 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.

[0101] 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.

[0102] In addition, since the RF 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 terminal 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 or in the RF subsystem 20, and the embodiment of the present application does not impose any restrictions on this.

[0103] 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.

[0104] 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.

[0105] The RF front-end module 22 can be composed of electronic devices such as filters, RF front-end modules, 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 RF signals, thereby ensuring that receiving and transmitting can work normally when sharing the same antenna; the filter is used to retain signals within a specific frequency band and filter out signals outside the characteristic frequency band. The RF front-end module 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.

[0106] In the embodiment of the present application, the RF front-end module 22 may include a RF switch.

[0107] 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.

[0108] 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.

[0109] 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.

[0110] 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.

[0111] In addition, the terminal device 100 may also include an application subsystem, which may serve as the main control system or main computing system of the terminal device 100, for running the main operating system and application programs, managing the software and hardware resources of the entire terminal device 100, and providing a user operation 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.

[0112] It should be understood that the above is only an example of the structure of the terminal device 100, and the terminal 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.

[0113] Figure 3 A schematic structural diagram of a radio frequency front-end module provided in an embodiment of the present application.

[0114] like Figure 3As shown, the RF front-end module 22 may include an RF transceiver module 23, an RF receiving module 24 and an antenna switch 25. The RF transceiver module 23 is electrically connected to the RF transceiver chip 21 and the antenna switch 25, respectively. The RF receiving module 24 is electrically connected to the RF transceiver chip 21 and the antenna switch 25, respectively. The antenna switch 25 is electrically connected to multiple antennas in the antenna subsystem 30. The RF transceiver module 23 is generally used to receive or transmit signals. Specifically, the content to be transmitted of the RF transceiver chip 21 is converted into a transmission signal, and the corresponding antenna is selected for transmission through the antenna switch 25. Or the signal is received through the antenna switch 25, and converted into a signal to be received and sent to the RF transceiver chip 21. The RF receiving module 24 is generally used to receive signals. However, when the RF transceiver module 23 cannot transmit and receive signals, the RF receiving module 24 can also be used to transmit and receive signals. Specifically, the corresponding antenna is selected through the antenna switch 25 to receive the signal, and it is converted into a signal to be received and sent to the RF transceiver chip 21. When the RF receiving module 24 still needs to transmit a signal, it can also convert the content to be transmitted of the RF transceiver chip 21 into a transmission signal, and select a corresponding antenna for transmission through the antenna switch 25 .

[0115] At present, the RF switch in the RF receiving module 24 generally has two symmetrical antenna paths, both of which can be connected to the transceiver port of the RF receiving module 24 and can support high-power scenarios. However, when the RF receiving module 24 needs to transmit and receive signals, one of the antenna paths is often connected to the transceiver port of the RF receiving module 24 for passing the transceiver signal, and the other antenna path only passes the receiving signal, which makes the RF switch over-designed, resulting in a larger area and insertion loss of the RF switch.

[0116] In view of this, an embodiment of the present application provides a radio frequency switch, in which the transceiver port of the radio frequency receiving module 24 is connected only to one antenna port for passing a higher-power transceiver signal, and the other antenna port is connected only to the output port for passing a lower-power receiving signal. This can not only meet the signal flow requirements of the radio frequency switch, but also avoid over-design of the radio frequency switch, reduce the area of ​​the radio frequency switch, and reduce the insertion loss of the radio frequency switch.

[0117] Combine the following Figures 4 to 8 First, we will introduce in detail the problem of connecting two antenna paths and the transceiver ports through the design of the RF switch in the RF receiving module.

[0118] Figure 4 A circuit diagram of a radio frequency front-end module provided in an embodiment of the present application.

[0119] like Figure 4As shown, in an embodiment provided in the present application, the RF front-end module includes an RF transceiver module 23, an RF receiving module 24, an antenna switch 25, a first antenna ANT1, a second antenna ANT2, a third antenna ANT3, and a fourth antenna ANT4. The first antenna port (LPAMiD_ANT1) of the RF transceiver module 23 is electrically connected to the first port of the antenna switch 25, the second antenna port (LPAMiD_ANT1) of the RF transceiver module 23 is electrically connected to the fourth antenna ANT4, the fourth port and the sixth port of the antenna switch 25 are electrically connected to the second antenna ANT2 and the third antenna ANT3, respectively, the third port of the antenna switch 25 is electrically connected to the receiving module LDiFEM, the second port and the fifth port of the antenna switch 25 are electrically connected to the transceiver port TRX and the second antenna port (LFEM_ANT2) of the RF receiving module 24, and the first antenna port (LFEM_ANT1) of the RF receiving module 24 is electrically connected to the first antenna ANT1. Exemplarily, the RF transceiver module 23 is LPAMiD, the RF receiving module 24 is LFEM, and the antenna switch 25 is XPXT, which can be 3P3T. The receiving module LDiFEM refers to a receiving component integrating a low noise amplifier, a RF switch and a filter.

[0120] In the embodiment of the present application, the RF transceiver module 23 is mainly used to switch the antenna through the antenna switch 25 to send the signal to be transmitted from the RF transceiver chip 21, or to switch the antenna through the antenna switch 25 to receive the signal and send it to the RF transceiver chip 21. The RF receiving module 24 is mainly used to receive the signal and send it to the RF transceiver chip 21; at the same time, when the RF transceiver module 23 cannot send or receive signals, the RF receiving module 24 can also be used to send or receive signals.

[0121] Optionally, in one embodiment of the present application, when the transceiver signal is switched to the RF receiving module 24, the transceiver signal can be switched by the RF switch in the RF receiving module 24, and work at the first antenna port (LPAMiD_ANT1) of the RF receiving module 24 or the second antenna port (LFEM_ANT2) of the RF receiving module 24, so the first antenna port (LPAMiD_ANT1) of the RF receiving module 24 and the second antenna port (LFEM_ANT2) of the RF receiving module 24 are both set according to a structure that can support high-power scenarios. That is, the paths in the RF switch that transmit and receive signals to the first antenna port (LPAMiD_ANT1) of the RF receiving module 24 and the second antenna port (LFEM_ANT2) of the RF receiving module 24 are both set with 12 switch devices (set according to VSWR<=3:1, Input power<=36dBm, Vrf<=30V), and this design results in a larger area of ​​the RF switch and a larger insertion loss. Optionally, the switch device can be a stack device or a MOS tube, etc.

[0122] However, when the transceiver signal works at the first antenna port (LPAMiD_ANT1) of the RF receiving module 24, the second antenna port (LFEM_ANT2) of the RF receiving module 24 only flows through the received signal, resulting in an over-design of the second antenna port (LFEM_ANT2) of the RF receiving module 24. When the transceiver signal works at the second antenna port (LFEM_ANT2) of the RF receiving module 24, the first antenna port (LPAMiD_ANT1) of the RF receiving module 24 only flows through the received signal, resulting in an over-design of the first antenna port (LPAMiD_ANT1) of the RF receiving module 24.

[0123] Figure 5 This is a signal trend diagram of a radio frequency front-end module provided in an embodiment of the present application.

[0124] like Figure 5 As shown, in an embodiment provided by the present application, exemplarily, when the RF receiving module 24 is required to transmit a signal, the signal to be transmitted is transmitted from the first antenna port (LPAMiD_ANT1) of the RF transceiver module 23 through the first port and the fifth port of the antenna switch 25 to the transceiver port TRX of the RF receiving module 24, and then transmitted from the first antenna port (LFEM_ANT1) of the RF receiving module 24 through the first antenna ANT1. When the RF receiving module 24 is required to receive a signal, the signal to be received is transmitted from the second antenna ANT2 through the fourth port and the second port of the antenna switch 25 to the second antenna port (LFEM_ANT2) of the RF receiving module 24. That is, only the first antenna port (LFEM_ANT1) of the RF receiving module 24 will flow through the transmission signal TX, and the second antenna port (LFEM_ANT2) of the RF receiving module 24 will not flow through the transmission signal TX, and only the reception signal RX will flow through.

[0125] Figure 6 A circuit diagram of a radio frequency receiving module provided in an embodiment of the present application.

[0126] like Figure 6As shown, in one embodiment provided in the present application, illustratively, a radio frequency switch (DPXT2), a transceiver port TRX, a first antenna port (LFEM_ANT1), a second antenna port (LFEM_ANT2) and a plurality of output ports, for example, LNAOUT1 to LNAOUT4, are provided inside the radio frequency receiving module 24. The radio frequency switch (DPXT2) is used to select a path between the transceiver port TRX and the first antenna port (LFEM_ANT1) or the second antenna port (LFEM_ANT2) for conducting. The two paths have the same structure and can support current shocks of relatively high power. Therefore, the number of switch devices in the two paths in the radio frequency switch is relatively large, the occupied area is relatively large, and the insertion loss is relatively large.

[0127] Optionally, in one embodiment of the present application, the transceiver signal only flows through the path between the transceiver port TRX and the first antenna port (LFEM_ANT1), and does not flow through the path between the transceiver port TRX and the second antenna port (LFEM_ANT2). The second antenna port (LFEM_ANT2) only flows through the received signal, resulting in that although the path between the transceiver port TRX and the second antenna port (LFEM_ANT2) only flows through a smaller-power received signal, it is over-designed as a structure that can support a larger-power transceiver signal, which wastes the area of ​​the RF switch and increases the insertion loss of the RF switch.

[0128] Figure 7 The present invention is a schematic diagram of the structure of a radio frequency switch provided in an embodiment of the present application.

[0129] like Figure 7 As shown, in an embodiment provided in the present application, exemplarily, the RF switch DPXT2 includes a transceiver port TRX, a first antenna port (LFEM_ANT1), a second antenna port (LFEM_ANT2) and a plurality of output ports (e.g., Output1 to Output7), and a connection path is provided between the first antenna port (LFEM_ANT1) and the second antenna port (LFEM_ANT2) and the transceiver port TRX and the plurality of output ports (e.g., Output1 to Output7), so that the transceiver port TRX can form a transceiver path with the first antenna port (LFEM_ANT1) and a transceiver path with the second antenna port (LFEM_ANT2).

[0130] Figure 8 A circuit diagram of a radio frequency switch provided in an embodiment of the present application.

[0131] like Figure 8As shown, in an embodiment provided in the present application, exemplarily, the first antenna port (LFEM_ANT1) and the second antenna port (LFEM_ANT2) are electrically connected to the transceiver port TRX and the multiple output ports (Output1 to Output7), and 12 switching devices are respectively provided between the first antenna port (LFEM_ANT1) and the second antenna port (LFEM_ANT2) and the transceiver port TRX and the multiple output ports (Output1 to Output7). At the same time, 12 switching devices are also provided between the transceiver port TRX and the multiple output ports (Output1 to Output7) and the ground terminal, and all of them can support high-power current shocks to prevent burning.

[0132] Therefore, in order to solve the problem that the transceiver port TRX and the first antenna port (LFEM_ANT1) and the second antenna port (LFEM_ANT2) in the embodiment of the present application can all support high-power current impact, resulting in over-design, large RF switch area and large insertion loss, the present application provides a RF switch, so that the transceiver port TRX only forms a path with one of the first antenna port (LFEM_ANT1) and the second antenna port (LFEM_ANT2), thereby reducing the area of ​​the RF switch and reducing the insertion loss.

[0133] Combine the following Figures 9 to 17 , and then a solution in which the transceiver port TRX of the RF switch forms a path with only one of the first antenna port (LFEM_ANT1) and the second antenna port (LFEM_ANT2) is introduced in detail.

[0134] Fig. 9 A diagram showing the structural changes of a radio frequency switch provided in an embodiment of the present application. Fig.10 This is a schematic diagram of the structure of a radio frequency switch provided in yet another embodiment of the present application.

[0135] like Fig. 9 and Fig.10As shown, in an embodiment provided in the present application, exemplarily, the path between the transceiver port TRX and the second antenna port (LFEM_ANT2) of the RF switch in the RF receiving module 24 is cut off, so that the first antenna port (LFEM_ANT1) can form a path with the transceiver port TRX and multiple output ports (Output1 to Output7) for the transmission signal with higher power to flow through, and correspondingly, a switch device structure capable of supporting higher power can be set; the second antenna port (LFEM_ANT2) can form a path with the multiple output ports (Output1 to Output7) for the reception signal with lower power to flow through, and correspondingly, a switch device structure capable of supporting lower power can be set, thereby obtaining an asymmetric RF switch, effectively avoiding over-design of the RF switch, reducing the area of ​​the RF switch, and reducing insertion loss.

[0136] Fig.11 This is a schematic diagram of the structure of a radio frequency switch provided in yet another embodiment of the present application.

[0137] like Fig.11 As shown, in an embodiment provided in the present application, exemplarily, correspondingly, the path between the transceiver port TRX of the RF switch in the RF receiving module 24 and the first antenna port (LFEM_ANT1) can also be cut off, so that the second antenna port (LFEM_ANT2) can form a path with the transceiver port TRX and multiple output ports (Output1 to Output7) for the transmission signal with higher power to flow through, and correspondingly, a switch device structure capable of supporting higher power can be set; the first antenna port (LFEM_ANT1) can form a path with the multiple output ports (Output1 to Output7) for the reception signal with lower power to flow through, and correspondingly, a switch device structure capable of supporting lower power can be set, thereby obtaining an asymmetric RF switch, effectively avoiding over-design of the RF switch, reducing the area of ​​the RF switch, and reducing insertion loss.

[0138] Fig.12 This is a circuit diagram of a radio frequency switch provided in yet another embodiment of the present application.

[0139] like Fig.12As shown, in an embodiment of the present application, the first antenna port (LFEM_ANT1) is electrically connected to the transceiver port TRX and multiple output ports (Output1 to Outputn), and a switch device capable of supporting a relatively high power is provided. Exemplarily, 12 switch devices are provided in the passage between the first antenna port (LFEM_ANT1) and the transceiver port TRX and multiple output ports (Output1 to Outputn) to support the flow of a relatively high power transceiver signal, so as to prevent current shock to other electronic devices in the terminal device and burn the electronic devices. Accordingly, 12 switch devices are also provided between the passage between the transceiver port TRX and the first antenna port (LFEM_ANT1) and the ground terminal. 12 switch devices are also provided between the passage between the multiple output ports (Output1 to Outputn) and the first antenna port (LFEM_ANT1) and the ground terminal. Optionally, the switch device may be a stack device or a MOS tube, etc. It should be understood that the number of the switch devices is determined by the actual needs of the terminal device and is not limited to 12.

[0140] The second antenna port (LFEM_ANT2) is electrically connected only to a plurality of output ports (Output1 to Outputn), and a switch device capable of supporting a relatively low power is provided. Exemplarily, the passages between the second antenna port (LFEM_ANT2) and the plurality of output ports (Output1 to Outputn) are provided with four switch devices to support the flow of a relatively low-power received signal, thereby preventing current shocks to other electronic devices in the terminal device and burning electronic devices. Four switch devices are provided between the passage between the plurality of output ports (Output1 to Outputn) and the second antenna port (LFEM_ANT2) and the ground terminal. It should be understood that the number of the switch devices is determined by the actual needs of the terminal device and is not limited to four.

[0141] In an embodiment of the present application, the transceiver port TRX is connected to the first antenna port (LFEM_ANT1), which reduces the path between the transceiver port TRX and the second antenna port (LFEM_ANT2), thereby reducing the area of ​​the RF switch and reducing the insertion loss of the RF switch. Furthermore, since only a relatively low-power receiving signal RX needs to be supported between the second antenna port (LFEM_ANT2) and the multiple output ports (Output1 to Outputn), the switch devices between the second antenna port (LFEM_ANT2) and the multiple output ports (Output1 to Outputn) can be reduced accordingly, further reducing the area of ​​the RF switch and reducing the insertion loss of the RF switch. By way of example, taking the RF switch of DP8T as an example, by adopting this embodiment, there can be an area gain of about 35% and an improvement of about 0.3dB in insertion loss.

[0142] Fig.13 This is a circuit diagram of a radio frequency switch provided in yet another embodiment of the present application.

[0143] like Fig.13 As shown, in an embodiment of the present application, the second antenna port (LFEM_ANT2) is electrically connected to the transceiver port TRX and multiple output ports (Output1 to Outputn), and a switch device capable of supporting a relatively high power is provided. Exemplarily, the passage between the second antenna port (LFEM_ANT2) and the transceiver port TRX and multiple output ports (Output1 to Outputn) is provided with 12 switch devices to support the passage of a relatively high power transceiver signal, so as to prevent current shock to other electronic devices in the terminal device and burn the electronic devices. Accordingly, 12 switch devices are also provided between the passage between the transceiver port TRX and the second antenna port (LFEM_ANT2) and the ground terminal. 12 switch devices are also provided between the passage between the multiple output ports (Output1 to Outputn) and the second antenna port (LFEM_ANT2) and the ground terminal. Optionally, the switch device can be a stack device or a MOS tube, etc. It should be understood that the number of the switch devices is determined by the actual needs of the terminal device and is not limited to 12.

[0144] The first antenna port (LFEM_ANT1) is electrically connected only to a plurality of output ports (Output1 to Outputn), and a switch device capable of supporting a relatively low power is provided. Exemplarily, the passages between the first antenna port (LFEM_ANT1) and the plurality of output ports (Output1 to Outputn) are provided with four switch devices to support the flow of a relatively low-power received signal, thereby preventing current shocks to other electronic devices in the terminal device and burning electronic devices. Four switch devices are provided between the passage between the plurality of output ports (Output1 to Outputn) and the first antenna port (LFEM_ANT1) and the ground terminal. It should be understood that the number of the switch devices is determined by the actual needs of the terminal device and is not limited to four.

[0145] In an embodiment of the present application, the transceiver port TRX is connected to the second antenna port (LFEM_ANT2), which reduces the path between the transceiver port TRX and the first antenna port (LFEM_ANT1), thereby reducing the area of ​​the RF switch and reducing the insertion loss of the RF switch. Furthermore, since only a relatively low-power receiving signal RX needs to be supported between the first antenna port (LFEM_ANT1) and the multiple output ports (Output1 to Outputn), the switch devices between the first antenna port (LFEM_ANT1) and the multiple output ports (Output1 to Outputn) can be reduced accordingly, further reducing the area of ​​the RF switch and reducing the insertion loss of the RF switch. By way of example, taking the RF switch of DP8T as an example, by adopting this embodiment, there can be an area gain of about 35% and an improvement of about 0.3dB in insertion loss.

[0146] Fig.14 This is a circuit diagram of a radio frequency switch provided in yet another embodiment of the present application.

[0147] like Fig.14 As shown, in the embodiment of the present application, the first antenna port (LFEM_ANT1) is electrically connected to the transceiver port TRX and multiple output ports (Output1 to Outputn), and a switch device capable of supporting a relatively high power can be provided between the first antenna port (LFEM_ANT1) and the multiple output ports (Output1 to Outputn), and a switch device capable of supporting a relatively low power can be provided between the first antenna port (LFEM_ANT1) and the transceiver port TRX. Exemplarily, 12 switch devices are provided in the passage between the first antenna port (LFEM_ANT1) and the multiple output ports (Output1 to Outputn) to support the passage of relatively high-power transceiver signals, thereby preventing current shock to other electronic devices in the terminal device and burning of electronic devices. In addition, since the path between the first antenna port (LFEM_ANT1) and the transceiver port TRX must be in an on state when the transmission signal flows through the transceiver port TRX, the current impact on the switching device is small, so only 4 switching devices can be set between the first antenna port (LFEM_ANT1) and the transceiver port TRX to prevent current impact on other electronic equipment in the terminal device and burning of electronic devices.

[0148] Correspondingly, 12 switch devices are also set between the path between the transceiver port TRX and the first antenna port (LFEM_ANT1) and the ground terminal. 12 switch devices are also set between the path between the multiple output ports (Output1 to Outputn) and the first antenna port (LFEM_ANT1) and the ground terminal.

[0149] The second antenna port (LFEM_ANT2) is electrically connected only to a plurality of output ports (Output1 to Outputn), and a switch device capable of supporting a relatively low power is provided. Exemplarily, the passages between the second antenna port (LFEM_ANT2) and the plurality of output ports (Output1 to Outputn) are provided with four switch devices to support the flow of a relatively low-power received signal, thereby preventing current shocks to other electronic devices in the terminal device and burning electronic devices. Similarly, four switch devices are provided between the passages between the plurality of output ports (Output1 to Outputn) and the second antenna port (LFEM_ANT2) and the ground terminal. It should be understood that the number of switch devices is determined by the actual needs of the terminal device and is not limited thereto.

[0150] In the embodiment of the present application, since the path between the transceiver port TRX and the first antenna port (LFEM_ANT1) is in a conductive state when the transmission signal flows through it, the setting of the switching device can also be reduced, further reducing the area of ​​the RF switch and reducing the insertion loss of the RF switch.

[0151] Fig.15 This is a circuit diagram of a radio frequency switch provided in yet another embodiment of the present application.

[0152] like Fig.15 As shown, in the embodiment of the present application, the second antenna port (LFEM_ANT2)) is electrically connected to the transceiver port TRX and multiple output ports (Output1 to Outputn), and a switch device capable of supporting a larger power can be set between the second antenna port (LFEM_ANT2)) and the multiple output ports (Output1 to Outputn), and a switch device capable of supporting a smaller power can be set between the second antenna port (LFEM_ANT2)) and the transceiver port TRX. Exemplarily, 12 switch devices are set in the passage between the second antenna port (LFEM_ANT2)) and the multiple output ports (Output1 to Outputn) to support the flow of a larger power transceiver signal to prevent current shock to other electronic devices in the terminal device and burn out the electronic devices. In addition, since the path between the second antenna port (LFEM_ANT2)) and the transceiver port TRX must be in an on state when the transmission signal flows through the transceiver port TRX, the current impact on the switching device is small, so only 4 switching devices can be set between the second antenna port (LFEM_ANT2)) and the transceiver port TRX to prevent current impact on other electronic equipment in the terminal device and burning of electronic devices.

[0153] Correspondingly, 12 switch devices are also set between the path between the transceiver port TRX and the second antenna port (LFEM_ANT2) and the ground terminal. 12 switch devices are also set between the path between the plurality of output ports (Output1 to Outputn) and the second antenna port (LFEM_ANT2) and the ground terminal.

[0154] The first antenna port (LFEM_ANT1) is electrically connected only to a plurality of output ports (Output1 to Outputn), and a switching device capable of supporting a relatively low power is provided. Exemplarily, the passages between the first antenna port (LFEM_ANT1) and the plurality of output ports (Output1 to Outputn) are provided with four switching devices to support the passage of a relatively low-power received signal, thereby preventing current shocks to other electronic devices in the terminal device and burning electronic devices. Similarly, four switching devices are provided between the passage between the plurality of output ports (Output1 to Outputn) and the first antenna port (LFEM_ANT1) and the ground terminal. It should be understood that the number of switching devices is determined by the actual needs of the terminal device and is not limited thereto.

[0155] In the embodiment of the present application, since the path between the transceiver port TRX and the second antenna port (LFEM_ANT2) is in an on state when the transmit signal flows through it, the setting of the switching device can also be reduced, further reducing the area of ​​the RF switch and reducing the insertion loss of the RF switch.

[0156] Fig.16 This is a circuit diagram of a radio frequency switch provided in yet another embodiment of the present application.

[0157] like Fig.16 As shown, in the embodiment of the present application, the first antenna port (LFEM_ANT1) is electrically connected to the transceiver port TRX and the multiple output ports (Output1 to Outputn), and the first antenna port (LFEM_ANT1) and the multiple output ports (Output1 to Outputn) can be connected through the first common path and the multiple first branches, thereby further reducing the number of switch devices between the first antenna port (LFEM_ANT1) and the multiple output ports (Output1 to Outputn). Exemplarily, the first common path between the first antenna port (LFEM_ANT1) and the multiple output ports (Output1 to Outputn) can be provided with 8 switch devices, and the first branch between the first common path and the multiple output ports (Output1 to Outputn) can be provided with 4 switch devices, and it is only necessary that the sum of the number of switch devices of the first common path and the first branch can support the flow of a relatively high-power transceiver signal.

[0158] Correspondingly, 12 switch devices are also set between the path between the transceiver port TRX and the first antenna port (LFEM_ANT1) and the ground terminal. 12 switch devices are also set between the path between the multiple output ports (Output1 to Outputn) and the first antenna port (LFEM_ANT1) and the ground terminal. Optionally, the switch device can be a stack device or a MOS tube. It should be understood that the number of the switch devices is determined by the actual needs of the terminal device and is not limited.

[0159] The second antenna port (LFEM_ANT2) is electrically connected only to a plurality of output ports (Output1 to Outputn), and a switch device capable of supporting a relatively low power is provided. Exemplarily, the passages between the second antenna port (LFEM_ANT2) and the plurality of output ports (Output1 to Outputn) can each be provided with 4 switch devices to support the passage of a relatively low power received signal. Similarly, 4 switch devices are provided between the passages between the plurality of output ports (Output1 to Outputn) and the second antenna port (LFEM_ANT2) and the ground terminal. It should be understood that the number of switch devices is determined by the actual needs of the terminal device and is not limited thereto.

[0160] In the embodiment of the present application, the transceiver port TRX is connected to the first antenna port (LFEM_ANT1), which reduces the path between the transceiver port TRX and the second antenna port (LFEM_ANT2), thereby reducing the area of ​​the RF switch and reducing the insertion loss of the RF switch. Further, since only a relatively low-power receiving signal RX needs to be supported between the second antenna port (LFEM_ANT2) and the multiple output ports (Output1 to Outputn), the switch devices between the second antenna port (LFEM_ANT2) and the multiple output ports (Output1 to Outputn) can be reduced accordingly, further reducing the area of ​​the RF switch and reducing the insertion loss of the RF switch. Further, the switch devices of the first common path between the first antenna port (LFEM_ANT1) and the multiple output ports (Output1 to Outputn) are shared, thereby also reducing the setting of the switch devices, further reducing the area of ​​the RF switch and reducing the insertion loss of the RF switch. By way of example, taking the RF switch of DP8T as an example, by adopting this embodiment, there can be about 50% area gain and about 0.3dB insertion loss improvement.

[0161] Fig.17 This is a circuit diagram of a radio frequency switch provided in yet another embodiment of the present application.

[0162] like Fig.17As shown, in the embodiment of the present application, the second antenna port (LFEM_ANT2) is electrically connected to the transceiver port TRX and the multiple output ports (Output1 to Outputn), and the second antenna port (LFEM_ANT2) and the multiple output ports (Output1 to Outputn) can be connected through a second common path and multiple second branches, thereby further reducing the number of switch devices between the second antenna port (LFEM_ANT2) and the multiple output ports (Output1 to Outputn). Exemplarily, the second common path between the second antenna port (LFEM_ANT2) and the multiple output ports (Output1 to Outputn) can be provided with 8 switch devices, and the second branch between the second common path and the multiple output ports (Output1 to Outputn) can be provided with 4 switch devices, and the sum of the number of switch devices of the second common path and the second branch can support the flow of a relatively high-power transceiver signal.

[0163] Correspondingly, 12 switch devices are also set between the path between the transceiver port TRX and the second antenna port (LFEM_ANT2) and the ground terminal. 12 switch devices are also set between the path between the multiple output ports (Output1 to Outputn) and the second antenna port (LFEM_ANT2) and the ground terminal. Optionally, the switch device can be a stack device or a MOS tube. It should be understood that the number of the switch devices is determined by the actual needs of the terminal device and is not limited.

[0164] The first antenna port (LFEM_ANT1) is electrically connected only to a plurality of output ports (Output1 to Outputn), and a switch device capable of supporting a relatively low power is provided. Exemplarily, the paths between the first antenna port (LFEM_ANT1) and the plurality of output ports (Output1 to Outputn) can each be provided with 4 switch devices to support the flow of a relatively low-power received signal. Similarly, 4 switch devices are provided between the path between the plurality of output ports (Output1 to Outputn) and the first antenna port (LFEM_ANT1) and the ground terminal. It should be understood that the number of switch devices is determined by the actual needs of the terminal device and is not limited thereto.

[0165] In the embodiment of the present application, the transceiver port TRX is connected to the second antenna port (LFEM_ANT2), which reduces the path between the transceiver port TRX and the first antenna port (LFEM_ANT1), thereby reducing the area of ​​the RF switch and reducing the insertion loss of the RF switch. Further, since only a relatively low-power receiving signal RX needs to be supported between the first antenna port (LFEM_ANT1) and the multiple output ports (Output1 to Outputn), the switch devices between the first antenna port (LFEM_ANT1) and the multiple output ports (Output1 to Outputn) can be reduced accordingly, further reducing the area of ​​the RF switch and reducing the insertion loss of the RF switch. Further, the switch devices of the second common path between the second antenna port (LFEM_ANT2) and the multiple output ports (Output1 to Outputn) are shared, thereby also reducing the setting of the switch devices, further reducing the area of ​​the RF switch and reducing the insertion loss of the RF switch. By way of example, taking the RF switch of DP8T as an example, by adopting this embodiment, there can be about 50% area gain and about 0.3dB insertion loss improvement.

[0166] An embodiment of the present application also provides a terminal device, including the RF front-end module as described above, the RF front-end module includes the RF switch described above, the transceiver port is connected only to one antenna port for a larger-power transceiver signal to flow through, and the other antenna port is connected only to the output port for a smaller-power receive signal to flow through, thereby satisfying the signal flow requirements of the RF switch and avoiding over-design of the RF switch, reducing the area of ​​the RF switch, and reducing the insertion loss of the RF switch.

[0167] It should be understood that the above is only an example of the structure of the terminal device 100, and the terminal 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.

[0168] The beneficial effects that can be achieved by the terminal device provided in the above-mentioned embodiment of the present application can be referred to the beneficial effects corresponding to the modules provided above, and will not be repeated here.

[0169] 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 solutions also fall within the scope of the embodiments of the present application. In addition, the coupling or direct coupling or communication connection shown or discussed can be an indirect coupling or communication connection through some interfaces, devices or units, which can be electrical, mechanical or other forms.

[0170] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0171] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

[0172] 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.

[0173] It should also be understood that in the various embodiments of the present application, the size of the serial number of each process 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.

[0174] 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 a terminal device), and the present application does not limit its specific implementation method.

[0175] 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.

[0176] 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.

[0177] Finally, it should be noted that the above is only a specific implementation method of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application shall be based on the protection scope of the claims. In short, the above is only a preferred embodiment of the technical solution of the present application, and is not used to limit the protection scope of the present application. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A radio frequency switch, characterized in that: including at least two antenna ports, a transceiver port, and a plurality of output ports; One of the at least two antenna ports is electrically connected to the transceiver port and the plurality of output ports, so that a transceiver signal flows through a path between the antenna port and the transceiver port and the plurality of output ports; Another antenna port of the at least two antenna ports is electrically connected to the plurality of output ports so that a path between the antenna port and the plurality of output ports flows through the received signal; The at least two antenna ports include a first antenna port and a second antenna port, wherein the first antenna port and the second antenna port are electrically connected to the plurality of output ports respectively; When the first antenna port is electrically connected to the transceiver port, the second antenna port is disconnected from the transceiver port; When the second antenna port is electrically connected to the transceiver port, the first antenna port is disconnected from the transceiver port.

2. The radio frequency switch according to claim 1, characterized in that: When the first antenna port is electrically connected to the transceiver port, the path between the first antenna port and the transceiver port and the multiple output ports supports signals of a first power, and the path between the second antenna port and the multiple output ports supports signals of a second power, and the first power is greater than the second power.

3. The radio frequency switch according to claim 2, characterized in that: N switching devices connected in series are arranged between the first antenna port and the multiple output ports, and m switching devices connected in series are arranged between the second antenna port and the multiple output ports; wherein n>m, and both n and m are positive integers.

4. The radio frequency switch according to claim 3, characterized in that: N series-connected switch devices are arranged between the first antenna port and the transceiver port.

5. The radio frequency switch according to claim 3, characterized in that: M series-connected switch devices are arranged between the first antenna port and the transceiver port.

6. The radio frequency switch according to any one of claims 2 to 5, characterized in that: The passage between the transceiver port and the first antenna port is also provided with n series-connected switch devices between the ground terminal.

7. The radio frequency switch according to any one of claims 2 to 5, characterized in that: The path between the multiple output ports and the first antenna port is also provided with n series-connected switch devices between the path and the ground terminal.

8. The radio frequency switch according to any one of claims 2 to 5, characterized in that: The path between the multiple output ports and the second antenna port is also provided with m series-connected switch devices between the path and the ground terminal.

9. The radio frequency switch according to any one of claims 2 to 5, characterized in that: A first common path and a plurality of first branches are provided between the first antenna port and the plurality of output ports, and the first antenna port is electrically connected to the plurality of output ports respectively through the first common path and the plurality of first branches; The first common path is provided with k switching devices connected in series, and the first branch is provided with m switching devices connected in series; wherein n=k+m, and k is a positive integer.

10. The radio frequency switch according to claim 1, characterized in that: When the second antenna port is electrically connected to the transceiver port, the path between the second antenna port and the transceiver port and the multiple output ports supports signals of a third power, and the path between the second antenna port and the multiple output ports supports signals of a fourth power, and the third power is greater than the fourth power.

11. The radio frequency switch according to claim 10, characterized in that: A number of switch devices connected in series are arranged between the second antenna port and the multiple output ports, and b number of switch devices connected in series are arranged between the second antenna port and the multiple output ports; wherein a>b, and a and b are both positive integers.

12. The radio frequency switch according to claim 11, characterized in that: A series-connected switch device is arranged between the second antenna port and the transceiver port.

13. The radio frequency switch according to claim 11, characterized in that: b series-connected switch devices are arranged between the second antenna port and the transceiver port.

14. The radio frequency switch according to any one of claims 10 to 13, characterized in that: A series switch device is also arranged between the path between the transceiver port and the second antenna port and the ground terminal.

15. The radio frequency switch according to any one of claims 10 to 13, characterized in that: A series switch device is also provided between the path between the multiple output ports and the second antenna port and the ground terminal.

16. The radio frequency switch according to any one of claims 10 to 13, characterized in that: The path between the multiple output ports and the first antenna port is further provided with b series-connected switch devices between the path and the ground terminal.

17. The radio frequency switch according to any one of claims 10 to 13, characterized in that: A second common path and a plurality of second branches are provided between the second antenna port and the plurality of output ports, and the second antenna port is electrically connected to the plurality of output ports respectively through the second common path and the plurality of second branches; The second common path is provided with c switching devices connected in series, and the second branch is provided with b switching devices connected in series; wherein a=b+c, ​​and c is a positive integer.

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

19. A radio frequency front-end chip, characterized in that: Includes the radio frequency front-end module as described in claim 18.

20. A terminal device, characterized in that: Including the radio frequency front-end chip, radio frequency transceiver chip and antenna subsystem as claimed in claim 19; The antenna subsystem includes a plurality of antennas, and the plurality of antennas are electrically connected to the at least two antenna ports respectively, so as to receive signals from space or transmit signals to space; The radio frequency transceiver chip is electrically connected to the transceiver port and the multiple output ports respectively, so as to receive signals and transmit signals from the transceiver port, and receive signals from the multiple output ports.

Images