WO2015143640A1 - 一种射频前端系统、信号传输控制方法及移动终端 - Google Patents

一种射频前端系统、信号传输控制方法及移动终端 Download PDF

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Publication number
WO2015143640A1
WO2015143640A1 PCT/CN2014/074111 CN2014074111W WO2015143640A1 WO 2015143640 A1 WO2015143640 A1 WO 2015143640A1 CN 2014074111 W CN2014074111 W CN 2014074111W WO 2015143640 A1 WO2015143640 A1 WO 2015143640A1
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WO
WIPO (PCT)
Prior art keywords
circuit
radio frequency
throw switch
working
antenna
Prior art date
Application number
PCT/CN2014/074111
Other languages
English (en)
French (fr)
Inventor
王洪裕
车翔
徐求良
杨丽萍
徐佳
刘志钢
刘震宇
Original Assignee
华为终端有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 华为终端有限公司 filed Critical 华为终端有限公司
Priority to EP14886816.9A priority Critical patent/EP3113373B1/en
Priority to US15/129,352 priority patent/US9948328B2/en
Priority to KR1020167029487A priority patent/KR101853753B1/ko
Priority to JP2016559354A priority patent/JP6329273B2/ja
Priority to PCT/CN2014/074111 priority patent/WO2015143640A1/zh
Priority to CN201480004967.5A priority patent/CN104969481B/zh
Publication of WO2015143640A1 publication Critical patent/WO2015143640A1/zh

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/005—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission adapting radio receivers, transmitters andtransceivers for operation on two or more bands, i.e. frequency ranges
    • H04B1/0053—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission adapting radio receivers, transmitters andtransceivers for operation on two or more bands, i.e. frequency ranges with common antenna for more than one band
    • H04B1/0057—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission adapting radio receivers, transmitters andtransceivers for operation on two or more bands, i.e. frequency ranges with common antenna for more than one band using diplexing or multiplexing filters for selecting the desired band
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/005—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission adapting radio receivers, transmitters andtransceivers for operation on two or more bands, i.e. frequency ranges
    • H04B1/0064—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission adapting radio receivers, transmitters andtransceivers for operation on two or more bands, i.e. frequency ranges with separate antennas for the more than one band
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/12—Supports; Mounting means
    • H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
    • H01Q1/24—Supports; Mounting means by structural association with other equipment or articles with receiving set
    • H01Q1/241—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM
    • H01Q1/242—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM specially adapted for hand-held use
    • H01Q1/243—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM specially adapted for hand-held use with built-in antennas
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/52—Means for reducing coupling between antennas; Means for reducing coupling between an antenna and another structure
    • H01Q1/521—Means for reducing coupling between antennas; Means for reducing coupling between an antenna and another structure reducing the coupling between adjacent antennas
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
    • H01Q5/30—Arrangements for providing operation on different wavebands
    • H01Q5/307—Individual or coupled radiating elements, each element being fed in an unspecified way
    • H01Q5/314—Individual or coupled radiating elements, each element being fed in an unspecified way using frequency dependent circuits or components, e.g. trap circuits or capacitors
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/005—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission adapting radio receivers, transmitters andtransceivers for operation on two or more bands, i.e. frequency ranges
    • H04B1/0053—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission adapting radio receivers, transmitters andtransceivers for operation on two or more bands, i.e. frequency ranges with common antenna for more than one band
    • H04B1/006—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission adapting radio receivers, transmitters andtransceivers for operation on two or more bands, i.e. frequency ranges with common antenna for more than one band using switches for selecting the desired band
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B15/00—Suppression or limitation of noise or interference
    • H04B15/02—Reducing interference from electric apparatus by means located at or near the interfering apparatus

Definitions

  • Radio frequency front end system Radio frequency front end system, signal transmission control method and mobile terminal
  • the present invention relates to the field of communications, and in particular, to a radio frequency front end system, a signal transmission control method, and a mobile terminal.
  • both broadband multi-band antennas need to cover low-frequency signals and high-frequency signals, which have large space requirements and are very difficult to implement for increasingly smaller mobile terminals.
  • a technical problem to be solved by embodiments of the present invention is to provide a radio frequency front end system and a signal transmission control method.
  • the problem that the antenna size of the mobile terminal in the prior art takes up a large space can be solved.
  • an embodiment of the present invention provides a radio frequency front-end system, including: a first antenna, a second antenna, a first radio frequency circuit, a second radio frequency circuit, and a control device;
  • the transmission frequency band selected by the first radio frequency circuit if the frequency in the transmission frequency band selected by the first radio frequency circuit is less than the preset frequency, controlling the first radio frequency circuit to be connected to the second antenna, and disconnecting the second radio frequency
  • the circuit is connected to the second antenna or maintains an open state of the second RF circuit and the second antenna.
  • control device is further configured to control the first radio frequency circuit to be connected to the first antenna if a frequency in a transmission frequency band selected by the first radio frequency circuit is not less than a preset frequency.
  • the method further includes:
  • a first gating circuit for connecting a working circuit of the first radio frequency circuit and the control device
  • a second gating circuit configured to turn on a connection between the working circuit of the second radio frequency circuit and the control device
  • the working circuit of the first radio frequency circuit is a working circuit corresponding to one of the plurality of frequency bands supported by the first radio frequency circuit;
  • the working circuit of the second radio frequency circuit is supported by the second radio frequency circuit a working circuit corresponding to one of the plurality of frequency bands;
  • the control device is specifically configured to acquire a frequency band corresponding to the working circuit of the first radio frequency circuit, and if the frequency in the frequency band corresponding to the working circuit of the first radio frequency circuit is less than the preset frequency, control the first The working circuit of the radio frequency circuit is connected to the second antenna, and disconnects the working circuit of the second radio frequency circuit from the second antenna or maintains the disconnected state of the working circuit of the second radio frequency circuit and the second antenna.
  • the first gating circuit is a first single-pole multi-throw switch, and the dynamic end of the first single-pole multi-throw switch
  • the control device is connected, wherein the k non-moving ends of the first single-pole multi-throw switch are respectively connected to k working circuits in the first radio frequency circuit, and the k working circuits are supported by the first radio frequency circuit
  • the working circuit corresponding to the i frequency bands; wherein i and k are positive integers, and i is greater than or equal to k; when i is greater than k, at least two frequency bands supported by the first radio frequency circuit correspond to the same working circuit ;
  • the second gating circuit is a second single-pole multi-throw switch, and the moving end of the second single-pole multi-throw switch is connected to the control device, and the m non-moving ends of the second single-pole multi-throw switch are respectively connected
  • the m working circuits in the second radio frequency circuit wherein the m working circuits are working circuits corresponding to n frequency bands supported by the second radio frequency circuit; wherein m and n are positive integers, and n is greater than or Equal to m; when n is greater than m, at least two frequency bands supported by the second radio frequency circuit correspond to the same working circuit.
  • the control device includes a first single pole double throw switch, a second single pole double throw switch and a controller; the moving end of the first single pole double throw switch is connected with the moving end of the first single pole multi throw switch, the first The k non-moving ends of the single-pole multi-throw switch are respectively connected to the k working circuits in the first radio frequency circuit, and the k working circuits are working circuits corresponding to the i frequency bands supported by the first radio frequency circuit; i and k are both positive integers, and i is greater than or equal to k; when i is greater than k, at least two of the first RF circuits support the same working circuit; the first single-pole double-throw switch a fixed end is connected to the first antenna, and a second fixed end of the first single pole double throw switch is connected to a first fixed end of the second single pole double throw switch;
  • the movable end of the second single-pole double-throw switch is connected to the second antenna, and the second fixed end of the second single-pole double-throw switch is connected to the movable end of the second single-pole multi-throw switch, the second single-knife
  • the m non-moving ends of the multi-throw switch are respectively connected to m working circuits in the second radio frequency circuit, wherein the m working circuits are working circuits corresponding to n frequency bands supported by the second radio frequency circuit; m and n are both positive integers, and n is greater than or equal to m; when n is greater than m, at least two frequency bands supported by the second radio frequency circuit correspond to the same working circuit;
  • the controller is specifically configured to acquire a transmission frequency band selected by the first radio frequency circuit, and if the frequency in the transmission frequency band is less than the preset frequency, turn on the dynamic end and the second end of the first single-pole double-throw switch The movable end and the first fixed end of the second single-pole double-throw switch are turned on.
  • the controller is further configured to: if the frequency in the transmission frequency band is not less than the preset frequency, turn on the The movable end of the first single pole double throw switch and the first fixed end.
  • a second aspect of the present invention provides a signal transmission control method in a radio frequency front-end system, where the radio frequency front-end system includes: a first antenna, a second antenna, a first radio frequency circuit, a second radio frequency circuit, and a control device;
  • the signal transmission control method includes:
  • the control device acquires a transmission frequency band selected by the first radio frequency circuit
  • the control device determines whether the frequency in the transmission frequency band is less than a preset frequency, and if so, controls the first radio frequency circuit to be connected to the second antenna, and disconnects the second radio frequency circuit from the second
  • the antenna is connected or maintains an open state of the second RF circuit and the second antenna.
  • the method further includes: And if the control device determines that the transmission frequency band selected by the first radio frequency circuit is not less than the preset frequency, the first radio frequency circuit is controlled to be connected to the first antenna.
  • the method further includes:
  • the first gating circuit is a first single-pole multi-throw switch, and the dynamic end of the first single-pole multi-throw switch
  • the control device is connected, wherein the k non-moving ends of the first single-pole multi-throw switch are respectively connected to k working circuits in the first radio frequency circuit, and the k working circuits are supported by the first radio frequency circuit
  • the working circuit corresponding to the i frequency bands; wherein i and k are positive integers, and i is greater than or equal to k; when i is greater than k, at least two frequency bands supported by the first radio frequency circuit correspond to the same working circuit ;
  • the second gating circuit is a second single-pole multi-throw switch, and the moving end of the second single-pole multi-throw switch is connected to the control device, and the m non-moving ends of the second single-pole multi-throw switch are respectively connected
  • the m working circuits in the second radio frequency circuit wherein the m working circuits are working circuits corresponding to n frequency bands supported by the second radio frequency circuit; wherein m and n are positive integers, and n is greater than or Equal to m; when n is greater than m, at least two frequency bands supported by the second radio frequency circuit correspond to the same working circuit.
  • control device includes a first single pole double throw switch, a second single pole double throw switch, and a controller
  • the moving end of the first single-pole double-throw switch is connected to the moving end of the first single-pole multi-throw switch, and the k fixed ends of the first single-pole multi-throw switch are respectively connected to k in the first RF circuit
  • the working circuits of the working circuits are the working circuits corresponding to the i frequency bands supported by the first radio frequency circuit; wherein i and k are positive integers, and i is greater than or equal to k; when i is greater than k, At least two frequency bands supported by the first RF circuit correspond to the same working circuit; a first fixed end of the first single-pole double-throw switch is connected to the first antenna, and the first single-pole double-throw switch a second fixed end and the second single a first fixed end connection of the double throw switch;
  • the movable end of the second single-pole double-throw switch is connected to the second antenna, and the second fixed end of the second single-pole double-throw switch is connected to the movable end of the second single-pole multi-throw switch, the second single-knife
  • the m non-moving ends of the multi-throw switch are respectively connected to m working circuits in the second radio frequency circuit, wherein the m working circuits are working circuits corresponding to n frequency bands supported by the second radio frequency circuit; m and n are both positive integers, and n is greater than or equal to m; when n is greater than m, at least two frequency bands supported by the second radio frequency circuit correspond to the same working circuit;
  • the control device determines whether the frequency in the transmission frequency band is less than a preset frequency, and if so, controls the first radio frequency circuit to be connected to the second antenna, and disconnects the second radio frequency circuit from the second
  • the step of connecting or maintaining the disconnection state of the second RF circuit and the second antenna includes: if the transmission frequency band is smaller than the preset frequency, the controller turns on the first single-pole double-throw switch The movable end and the second fixed end are connected to the movable end of the second single-pole double-throw switch and the first fixed end.
  • the method further includes:
  • the controller turns on the dynamic end of the first single-pole double-throw switch and the first fixed end.
  • a third aspect of the embodiments of the present invention provides a mobile terminal, including any of the foregoing radio frequency front end systems.
  • the first antenna of the RF front-end system is only responsible for transmitting signals in the high frequency band, which can effectively reduce the size of the first antenna, thereby reducing the antenna size requirement of the dual antenna terminal.
  • FIG. 1 is a schematic structural diagram of a radio frequency front-end system according to a first embodiment of the present invention
  • FIG. 2 is a schematic structural diagram of a radio frequency front-end system according to a second embodiment of the present invention
  • FIG. 3 is a schematic structural diagram of a radio frequency front end system according to a third embodiment of the present invention.
  • FIG. 4 is a schematic structural diagram of a radio frequency front end system according to a fourth embodiment of the present invention.
  • FIG. 5 is a schematic flow chart of a signal transmission control method in a radio frequency front-end system according to a first embodiment of the present invention
  • FIG. 6 is a flow chart showing a signal transmission control method in a radio frequency front end system according to a second embodiment of the present invention. detailed description
  • the radio frequency front end system and the signal transmission method provided by the embodiments of the present invention described below can be applied to terminals supporting multiple communication systems and frequency bands, for example: Universal Mobile Telecommunication System (UMTS) Terrestrial Communication System (Evolved Universal) Mobile Telecommunication System Territorial Radio Access Network (E-UTRAN), UMTS Territorial Radio Access Network (UTRAN), Global System for Mobile Communications (GSM) / GSM Evolution for Increasing Data Rates The GSM EDGE Radio Access Network (GERAN), the 3rd Generation Partner Project (3GPP) communication system, and the like.
  • UMTS Universal Mobile Telecommunication System
  • E-UTRAN Evolved Universal Mobile Telecommunication System Territorial Radio Access Network
  • UTRAN UMTS Territorial Radio Access Network
  • GSM Global System for Mobile Communications
  • GSM Global System for Mobile Communications
  • GERAN Global System for Mobile Communications
  • GERAN Global System for Mobile Communications
  • 3GPP 3rd Generation Partner Project
  • the radio frequency front-end system includes a first antenna 11, a second antenna 12, a control device 13, and a first radio frequency.
  • the first radio frequency circuit 14 and the second radio frequency circuit 15 are both configured to modulate the baseband signal onto the high frequency carrier to transmit through the antenna and demodulate the high frequency signal received via the antenna into a baseband signal.
  • First RF circuit 14 Multiple communication systems and multiple frequency bands can be used to transmit and receive signals using Frequency Division Duplexing (FDD) or Time Division Duplexing (TDD) lines.
  • the second RF circuit 15 also supports multiple signals.
  • the communication system and multiple frequency bands can be used to transmit and receive signals by frequency division duplex or time division duplex.
  • the first radio frequency circuit 14 can support the GSM communication system (band number: B2/B3/B5/B8), the UMTS communication system (band number: B1/B2/B5), and the TD-LTE communication system (band number: B38/) B39/B40/B41), FD-LTE mode (band number: B3/B7) and TDS communication system (band number: B34/B39)
  • the second radio frequency circuit 14 also supports the above communication system and frequency band.
  • the upper and lower frequency bands corresponding to the frequency band number can be queried from 3GPP TS 36.101 and TS 25.101.
  • UMTS B1 is frequency division duplex mode, uplink frequency band: 1920MHz-1980MHz; TDS B34 is time division duplex mode, uplink frequency band and downlink frequency band.
  • TDS B34 is time division duplex mode, uplink frequency band and downlink frequency band.
  • 2010MHz-2025MHz GSM B2 is the frequency division duplex mode, the uplink frequency band: 1850 - 1910MHz, the downlink frequency band: 1930MHz-1990MHz, the frequency band corresponding to other frequency band numbers will not be described here.
  • Both the first antenna 11 and the second antenna 12 are used to receive or transmit high frequency signals.
  • the control device 13 obtains the transmission frequency band selected by the first RF circuit 14, and if the frequency in the transmission frequency band selected by the first RF circuit 14 is less than the preset frequency, the first RF circuit is controlled to be connected to the second antenna. And disconnecting the second RF circuit from the second antenna or maintaining an open state of the second RF circuit and the second antenna.
  • the control device 13 acquires the transmission frequency band selected by the first RF circuit 14, and compares the first shot to determine the frequency interval of the transmission frequency band selected by the first RF circuit 14, if any frequency selected from the frequency band is smaller than
  • the preset frequency determines that the frequency of the transmission frequency band selected by the first RF circuit 14 is less than the preset frequency, and vice versa, is greater than the preset frequency.
  • the control device 13 obtains the transmission frequency band selected by the first RF circuit 14 to be 830 MHz-840 MHz (the uplink frequency band of B5), and determines that the frequency in the transmission frequency band selected by the first RF circuit 14 is less than the preset.
  • the frequency control device 14 controls the first RF circuit 14 to be connected to the second antenna 12 and disconnects the second RF circuit 15 from the second antenna 12 or maintains the open state of the second RF circuit 14 and the second antenna 12.
  • control device 13 is further configured to control the first radio frequency circuit to be connected to the first antenna if the frequency in the transmission frequency band selected by the first radio frequency circuit is less than the preset frequency.
  • connection or disconnection of the RF circuit (the first RF circuit or the second RF circuit) and the antenna (the first antenna or the second antenna) is for signal transmission, and if the RF circuit and the antenna are connected, It means that the RF circuit can transmit signals through the antenna. If the RF circuit is disconnected from the antenna, it means that the RF circuit cannot transmit and receive signals through the antenna.
  • the connection referred to herein does not have to be physically connected, or physically disconnected, and the signal is transmitted by means of a hybrid mode, which is also the connection referred to in the present invention.
  • the control device acquires a transmission frequency band selected by the first radio frequency circuit, and if the frequency in the transmission frequency band selected by the first radio frequency circuit is less than a preset frequency, transmitting the signal via the second antenna, and prohibiting the
  • the second RF circuit transmits, and the first antenna of the RF front-end system is only responsible for transmitting the signal of the high frequency band, which can effectively reduce the size of the first antenna, thereby reducing the requirement of the antenna size of the dual antenna terminal.
  • the radio frequency front-end system includes a first antenna 11, a second antenna 12, a control device 13, and a first radio frequency.
  • the circuit 14 and the second RF circuit 15 further include a first gating circuit 16 and a second gating circuit 17, and the first gating circuit 16 is disposed between the control device 13 and the first RF circuit 14 for turning on
  • the working circuit of the first RF circuit 14 is connected to the control device 13.
  • the second gate circuit 17 is disposed between the control device 13 and the second RF circuit 15 for turning on the working circuit and the control device of the second RF circuit 15.
  • the working circuit of the first RF circuit 14 is a working circuit corresponding to one of a plurality of frequency bands supported by the first RF circuit 14, and each working circuit processes one of a plurality of frequency bands supported by the first RF circuit. Or a plurality of signals; the working circuit of the second RF circuit 15 is a working circuit corresponding to one of the plurality of frequency bands supported by the second RF circuit 15, and each working circuit is used for It signals a plurality of frequency bands or a plurality of a second RF circuit in support.
  • the communication systems and frequency bands supported by the first RF circuit are GSM (B2/B8), UTMS (B5), FD-LTE (B3/B7), TD-LTE (B38/B40/B41), and TDS (B34/B39).
  • the first RF circuit includes four working circuits, a working circuit 1, a working circuit 2, a working circuit 3, and a working circuit 4, wherein the working circuit 1 processes signals in the GSM (B2/B8) frequency band, and the working circuit 2 processes the UTMS.
  • the first gating circuit 16 turns on the connection of the working circuit 1 and the control device 13 in the working circuit of the first radio frequency circuit 14.
  • the working process of the second gating circuit is the same as that of the first gating circuit, and details are not described herein again.
  • the first gating circuit 16 is a first single-pole multi-throw switch
  • the second gating circuit 17 is a second single-pole multi-throw switch.
  • One of the moving ends of the first single-pole multi-throw switch is connected to the corresponding one of the first RF circuits 14.
  • a working circuit the fixed end of which is connected to the control device 13
  • the first single-pole multi-throw switch is connected to the working circuit of the first RF circuit 14 and the control device 13 through the blade
  • the second end of the second single-pole multiple address switch is connected to the second
  • a corresponding working circuit of the RF circuit 15 has a fixed end connected to the control device 13, and a second single-pole multi-throw switch is connected to the working circuit of the second RF circuit 14 and the control device 13 via the blade.
  • the radio frequency front-end system includes a first antenna 11, a second antenna 12, a control device 13, and a first radio frequency circuit. 14.
  • the circuit 14 includes a working circuit 141, a working circuit 142, a working circuit 143, and a working circuit 144.
  • the second RF circuit 15 includes a working circuit 151, a working circuit 152, a working circuit 153, and a working circuit 154.
  • the control device 13 includes a controller 131, a first single pole double throw switch 133 and a second single pole double throw switch.
  • the connection relationship of the components is: the moving end of the first single-pole double-throw switch 133 is connected to the moving end of the first single-pole multi-throw switch 16, and the four fixed ends of the first single-pole multi-throw switch 16 are respectively connected to the first RF circuit 14
  • the first fixed end of the first single-pole double-throw switch 133 is connected to the first antenna 11
  • the second fixed end of the first single-pole double-throw switch 133 and the second single-pole double-throw switch 132 a movable end of the second single-pole double-throw switch 132 is connected to the second antenna 12
  • a second fixed end of the second single-pole double-throw switch 132 is connected to the movable end of the second single-pole multi-throw switch 17, second
  • the four fixed ends of the single-pole multi-throw switch 17 are respectively connected to four working circuits in the second RF circuit 15, and the controller 131 is respectively connected to the first single-pole double-throw switch 131, the second single-pole double
  • the controller 131 acquires the transmission frequency band selected by the first RF circuit 14, and if the frequency in the transmission frequency band is less than the preset frequency, turns on the dynamic end and the second fixed end of the first single-pole double-throw switch 133, and turns on the second single-pole The movable end of the double throw switch 132 and the first fixed end.
  • the communication system and frequency bands supported by the first radio frequency circuit 14 are GSM (B2/B3/B5/B8), UTMS (B1/B2/B5), and FD-LTE (B3).
  • the second RF circuit 15 also supports the above The signal system and the frequency band, assuming that the preset frequency is 961 MHz, if the transmission frequency band selected by the first RF circuit 14 is GSM (B5/B8) and UTMS (B5), since the frequency in the above frequency band is less than the preset frequency 961 MHz, the above frequency band
  • the signal needs to be transmitted through the second antenna 12, and the controller 13 turns on the dynamic end of the first single-pole double-throw switch 133 and the second fixed end, and simultaneously sets the dynamic end of the second single-pole double-throw switch 132 with the first The mobile terminal is turned on.
  • the first RF circuit 14 and the second antenna 12 are in a connected state, and the second RF circuit 15 has no transmission requirement, the first RF circuit The high frequency signal of 14 is also transmitted through the second antenna 12 at this time.
  • control device may also transmit the high frequency portion of the signal of the same standard through the first antenna, and transmit the low frequency portion through the second antenna, for example, the high frequency B1 frequency band of the UMTS communication system.
  • the signal is transmitted through the first antenna, and the signal in the low frequency B2/B5 band is transmitted through the second antenna.
  • the controller 13 is further configured to: if the frequency in the transmission frequency band selected by the first RF circuit 14 is not less than the preset frequency, turn on the dynamic end of the first single-pole double-throw switch 133 and the first fixed end, the first RF The circuit 14 transceives signals through the first antenna 11.
  • the control device acquires a transmission frequency band selected by the first radio frequency circuit, and if the frequency in the transmission frequency band selected by the first radio frequency circuit is smaller than the preset frequency, transmitting the signal via the second antenna, and The second RF circuit is prohibited from transmitting.
  • the first antenna of the RF front-end system is only responsible for transmitting signals in the high frequency band, which can effectively reduce the size of the first antenna, thereby reducing the requirement of the antenna size of the dual antenna terminal.
  • the radio frequency front-end system includes a first antenna 11, a second antenna 12, a control device 13, and a first radio frequency circuit 14,
  • the second RF circuit 15, the first single-pole multi-throw switch 16 and the second single-pole multi-throw switch 17, the control device comprises a first single-pole double-throw switch 133, a second single-pole double-throw switch 132 and a controller 131 (not shown in FIG.
  • the first single-pole multi-throw switch 16 includes six working circuits
  • the second single-pole multi-throw switch 17 includes two working circuits (not shown)
  • the first single-pole multi-throw switch 16 is a single-pole six-throw switch ( SP6T)
  • the second single-pole multi-throw switch 17 is a single-pole double-throw switch (SP2T).
  • connection relationship of the above components is: the first antenna 11 is connected to the first fixed end of the first single-pole double-throw switch 133, and the second fixed end of the first single-pole double-throw switch 133 is connected to the second single-pole double-throw switch 132.
  • the movable end of the first single-pole double-throw switch 133 is connected to the movable end of the first single-pole multi-throw switch 16, and the six fixed ends of the first single-pole multi-throw switch 16 are respectively connected to six of the first RF circuit 14 Working circuit;
  • the second antenna 12 is connected to the moving end of the second single-pole double-throw switch 132, the second fixed end is connected to the moving end of the second single-pole multi-throw switch 17, and the two fixed ends of the second single-pole multi-throwing switch 17 are Two working circuits of the second RF circuit 15 are respectively connected.
  • the transmission path between the first RF circuit 14 and the first antenna 11 is defined as the path 1
  • the transmission path between the first RF circuit 14 and the second antenna 12 is the path 2
  • the transmission path between 12 is path 3.
  • the working principle of the radio frequency front-end system of the embodiment of the present invention is: assume that the communication system and frequency band supported by the first radio frequency circuit are: GSM (B2/B3/B5/B8) UMTS (B1/B2/B5) FD-LTE (B3/ B7) TD-LTE (B38/B39/B40/B41) TDS (B34/B39), the communication system and frequency band supported by the second RF circuit 15 are: GSM (B3/B8).
  • the B5 and B8 frequency bands are low frequency bands distributed below 960 MHz, and the preset frequency is set to 961 MHz, if the transmission frequency band selected by the first RF circuit 14 is GSM (B5/B8) and UTMS (B5) ), since the frequency in the above frequency band is less than the preset frequency 961 MHz, the signal of the above frequency band needs to be transmitted through the path 2, and the controller 13 turns on the dynamic end of the first single-pole double-throw switch 133 and the second fixed end, and simultaneously The movable end of the second single-pole double-throw switch 132 is connected to the first fixed end.
  • the signal of the same communication system is transmitted when the signal of the first RF circuit 14 is transmitted through the second antenna 12 (ie, through the path 2).
  • Signals of other frequency bands can also be transmitted through the second antenna 12 (i.e., via path 2).
  • the GSM (B5/B8) signal in the first RF circuit 14 is at the previous moment.
  • the signal is transmitted through the path 2, and the signal of the B2/B3 frequency band needs to be transmitted in the GSM communication system at the current time.
  • the signal of the B2/B3 frequency band is also transmitted through the path 2, and the first single-pole double-throw switch 133 does not need to be controlled. Switching operation, switching the transmission path from path 2 to path 1.
  • the signal of the B1/B2 band of UMTS is also transmitted through path 2. Therefore, in this embodiment, if the frequency in the transmission frequency band selected by the first radio frequency circuit 14 is not less than the preset frequency 961 MHz, the FD-LTE (B3/B7) TD-LTE supported by the first radio frequency circuit 14 (B38/B39) /B40/B41)
  • the TDS (B34/39) signal is transmitted through path 1.
  • the first RF circuit 14 supports GSM (B2/B3/). B5/B8) UTMS (B1/B2/B5) signals are transmitted through path 2, and at the same time, When the first RF circuit 14 transmits through the path 1, the GSM (B3/B8) signal supported by the second RF circuit 15 selects the path 3 for transmission.
  • the control device acquires a transmission frequency band selected by the first radio frequency circuit, and if the frequency in the transmission frequency band selected by the first radio frequency circuit is smaller than the preset frequency, transmitting the signal via the second antenna, and The second RF circuit is prohibited from transmitting.
  • the first antenna of the RF front-end system is only responsible for transmitting signals in the high frequency band, which can effectively reduce the size of the first antenna, thereby reducing the requirement of the antenna size of the dual antenna terminal.
  • FIG. 5 is a flowchart of a signal transmission control method in a radio frequency front-end system according to a first embodiment of the present invention.
  • the method includes:
  • the control device acquires a transmission frequency band selected by the first radio frequency circuit.
  • the control device determines whether the frequency in the transmission frequency band is less than a preset frequency. If yes, execute S103. If no, execute S104.
  • the RF front end circuit includes a first antenna, a second antenna, a first RF circuit, a second RF circuit, and a control device.
  • the embodiment of the present invention and the device embodiment are based on the same concept, and the technical effects thereof are also the same. For details, refer to the description of the foregoing embodiment, and details are not described herein again.
  • the control device acquires a transmission frequency band selected by the first radio frequency circuit, and if the frequency in the transmission frequency band selected by the first radio frequency circuit is smaller than the preset frequency, transmitting the signal via the second antenna, and The second RF circuit is prohibited from transmitting.
  • the first antenna of the RF front-end system is only responsible for transmitting signals in the high frequency band, which can effectively reduce the size of the first antenna, thereby reducing the requirement of the antenna size of the dual antenna terminal.
  • FIG. 6 is a schematic flowchart of a signal transmission control method in a radio frequency front-end system according to a second embodiment of the present invention.
  • the method includes:
  • the control device acquires a transmission frequency band selected by the first radio frequency circuit.
  • the controller in the control device determines whether the frequency in the transmission frequency band is less than a preset frequency. If If the determination is yes, execute S203, otherwise, execute S204.
  • the controller turns on the dynamic end and the second fixed end of the first single-pole double-throw switch, and turns on the movable end and the non-moving end of the second single-pole double-throw switch.
  • the controller turns on the dynamic end of the first single-pole double-throw switch and the first fixed end.
  • the RF front-end system further includes: a first single-pole multi-throw switch and a second single-pole multi-throw switch.
  • the movable end of the first single-pole multi-throw switch is connected with the control device, and the k non-moving ends of the first single-pole multi-throw switch are respectively connected to k working circuits in the first RF circuit, and the k working circuits are supported by the first RF circuit.
  • the working circuit corresponding to i frequency bands; wherein i and k are positive integers, and i is greater than or equal to k; when i is greater than k, at least two frequency bands supported by the first radio frequency circuit correspond to the same working circuit.
  • the movable end of the second single-pole multi-throw switch is connected with the control device, and the m non-moving ends of the second single-pole multi-throw switch are respectively connected to m working circuits in the second RF circuit, and the m working circuits are supported by the second RF circuit.
  • the working circuit corresponding to the n frequency bands; wherein m and n are positive integers, and n is greater than or equal to m; when n is greater than m, at least two frequency bands supported by the second RF circuit correspond to the same working circuit.
  • the control device comprises a first single-pole double-throw switch, a second single-pole double-throw switch and a controller; the movable end of the first single-pole double-throw switch is connected to the working circuit of the first RF circuit through the first single-pole multi-throw switch, the first The movable end is connected to the first antenna, and the second fixed end is connected to the first fixed end of the second single-pole double-throw switch; the movable end of the second single-pole double-throw switch is connected to the second antenna, and the second fixed end thereof The connection is connected to the working circuit of the second RF circuit through the second single-pole multi-throw switch.
  • the control device acquires a transmission frequency band selected by the first radio frequency circuit, and if the frequency in the transmission frequency band selected by the first radio frequency circuit is smaller than the preset frequency, transmitting the signal via the second antenna, and The second RF circuit is prohibited from transmitting.
  • the first antenna of the RF front-end system is only responsible for transmitting signals in the high frequency band, which can effectively reduce the size of the first antenna, thereby reducing the requirement of the antenna size of the dual antenna terminal.
  • the machine can be read into a storage medium, and when executed, the program can include the flow of an embodiment of the methods as described above.
  • the storage medium may be a magnetic disk, an optical disk, a read-only memory (ROM), or a random access memory (RAM).

Abstract

本发明实施例公开了一种射频前端系统，包括第一天线、第二天线、第一射频电路、第二射频电路和控制装置；所述控制装置用于获取所述第一射频电路选用的传输频段，若所述第一射频电路选用的传输频段中的频率小于预设频率，则控制所述第一射频电路与所述第二天线连接，并断开第二射频电路与所述第二天线的连接或保持第二射频电路与所述第二天线的断路状态。本发明实施例还公开了一种信号传输控制方法。采用本发明，能有效减少天线的尺寸。

Description

一种射频前端系统、 信号传输控制方法及移动终端
技术领域
本发明涉及通信领域， 尤其涉及一种射频前端系统、信号传输控制方法及 移动终端。
目前， 为了满足日益增长的用户对移动终端下载速率及多制式漫游的需 求， 运营商不仅将 2G、 3G网络逐步过渡到 4G LTE网络， 而且提供了多网络 漫游及语音和数据同时并存处理的模式， 例如 SVDO， SV-LTE, SG-LTE等。 以中移动为例， 提供了多通信制式多频段模式， 其多个通信制式为 TD-LTE通 信制式、 FDD-LTE通信制式、 GSM通信制式、 TD-SCDMA通信制式和 WCDMA 通信制式， 支持的频段数量为 10频段到 13频段。 为了更好的用户体验， 中移 动提出了 SG-LTE的概念， 可以同时处理语音和数据业务， 即语音走 GSM网 络， 同时数据走 TD-SCDMA或 TD-LTE。
针对语音和数据并发的模式，至少需要两个射频电路和至少两个宽带多频 段主天线。 通常， 两个宽带多频段天线均需要覆盖低频信号和高频信号， 其对 空间尺寸要求大， 对于体积日益减小的移动终端而言， 非常难实现。 发明内容
本发明实施例所要解决的技术问题在于，提供一种射频前端系统和信号传 输控制方法。 可解决现有技术中移动终端的天线尺寸占用空间大的问题。
为了解决上述技术问题， 本发明实施例提供了一种射频前端系统， 包括： 第一天线、 第二天线、 第一射频电路、 第二射频电路和控制装置； 所述控制装置用于获取所述第一射频电路选用的传输频段，若所述第一射 频电路选用的传输频段中的频率小于预设频率，则控制所述第一射频电路与所 述第二天线连接，并断开第二射频电路与所述第二天线的连接或保持第二射频 电路与所述第二天线的断路状态。
结合第一方面的第一种可能的实现方式，在第二种可能的实现方式中， 所 述控制装置还用于若所述第一射频电路选用的传输频段中的频率不小于预设 频率， 控制所述第一射频电路与所述第一天线连接。
结合第一方面的第一种可能的实现方式，在第二种可能的实现方式中，还 包括：
第一选通电路，用于接通所述第一射频电路的工作电路和所述控制装置的 连接； 和
第二选通电路，用于接通所述第二射频电路的工作电路与所述控制装置的 连接；
其中，所述第一射频电路的工作电路为所述第一射频电路所支持的多个频 段之一对应的工作电路；所述第二射频电路的工作电路为所述第二射频电路所 支持的多个频段之一对应的工作电路；
所述控制装置具体用于获取所述第一射频电路的工作电路对应的频段，若 所述第一射频电路的工作电路对应的频段中的频率小于所述预设频率，则控制 所述第一射频电路的工作电路与所述第二天线连接，并断开第二射频电路的工 作电路与所述第二天线的连接或保持第二射频电路的工作电路与所述第二天 线的断路状态。
结合第一方面的第二种可能的实现方式，在第三种可能的实现方式中， 所 述第一选通电路为第一单刀多掷开关，所述第一单刀多掷开关的动端与所述控 制装置连接，所述第一单刀多掷开关的 k个不动端分别连接所述第一射频电路 中的 k个工作电路， 所述 k个工作电路为所述第一射频电路所支持的 i个频段 所对应的工作电路； 其中 i和 k均为正整数， 且 i大于或等于 k; 当 i大于 k 时， 至少有两个所述第一射频电路所支持频段对应同一个工作电路；
所述第二选通电路为第二单刀多掷开关，所述第二单刀多掷开关的动端与 所述控制装置连接， 所述第二单刀多掷开关的 m个不动端分别连接所述第二 射频电路中的 m个工作电路， 所述 m个工作电路为所述第二射频电路所支持 的 n个频段所对应的工作电路； 其中 m和 n均为正整数， 且 n大于或等于 m; 当 n大于 m时， 至少有两个所述第二射频电路所支持的频段对应同一个工作 电路。
结合第一方面的第三种可能的实现方式，在第四种可能的实现方式中， 所 述控制装置包括第一单刀双掷开关、 第二单刀双掷开关和控制器； 所述第一单刀双掷开关的动端与所述第一单刀多掷开关的动端连接，所述 第一单刀多掷开关的 k个不动端分别连接所述第一射频电路中的 k个工作电路 所述 k个工作电路为所述第一射频电路所支持的 i个频段所对应的工作电路； 其中 i和 k均为正整数， 且 i大于或等于 k; 当 i大于 k时， 至少有两个所述第 一射频电路所支持频段对应同一个工作电路；所述第一单刀双掷开关的第一不 动端与所述第一天线连接，所述第一单刀双掷开关的第二不动端与所述第二单 刀双掷开关的第一不动端连接；
所述第二单刀双掷开关的动端与第二天线连接，所述第二单刀双掷开关的 第二不动端与所述第二单刀多掷开关的动端连接，所述第二单刀多掷开关的 m 个不动端分别连接所述第二射频电路中的 m个工作电路， 所述 m个工作电路 为所述第二射频电路所支持的 n个频段所对应的工作电路； 其中 m和 n均为 正整数， 且 n大于或等于 m; 当 n大于 m时， 至少有两个所述第二射频电路 所支持的频段对应同一个工作电路；
所述控制器具体用于获取所述第一射频电路选择的传输频段，若所述传输 频段中的频率小于所述预设频率，接通所述第一单刀双掷开关的动端与第二不 动端， 且接通第二单刀双掷开关的动端与第一不动端。
结合第一方面的第四种可能的实现方式，在第五种可能的实现方式中， 所 述控制器还用于若所述传输频段中的频率不小于所述预设频率，接通所述第一 单刀双掷开关的动端与第一不动端。
本发明实施例第二方面提供了一种射频前端系统中信号传输控制方法，所 述射频前端系统包括： 第一天线、 第二天线、 第一射频电路、 第二射频电路和 控制装置；
所述信号传输控制方法包括：
所述控制装置获取第一射频电路选用的传输频段；
所述控制装置判断所述传输频段中的频率是否小于预设频率， 若为是， 则 控制所述第一射频电路与所述第二天线连接，并断开第二射频电路与所述第二 天线的连接或保持第二射频电路与所述第二天线的断路状态。
结合第二方面， 在第一种可能的实现方式中， 还包括： 若所述控制装置判断所述第一射频电路选用的传输频段不小于所述预设 频率， 控制所述第一射频电路与所述第一天线连接。
结合第二方面， 在第二种可能的实现方式中， 还包括：
控制第一选通电路接通所述第一射频电路的工作电路和所述控制装置的 连接； 和
控制第二选通电路接通所述第二射频电路的工作电路与所述控制装置的 连接； 其中， 所述第一射频电路的工作电路为所述第一射频电路所支持的多个 频段之一对应的工作电路；所述第二射频电路的工作电路为所述第二射频电路 所支持的多个频段之一对应的工作电路。
结合第二方面的第二种可能的实现方式，在第三种可能的实现方式中， 所 述第一选通电路为第一单刀多掷开关，所述第一单刀多掷开关的动端与所述控 制装置连接，所述第一单刀多掷开关的 k个不动端分别连接所述第一射频电路 中的 k个工作电路， 所述 k个工作电路为所述第一射频电路所支持的 i个频段 所对应的工作电路； 其中 i和 k均为正整数， 且 i大于或等于 k; 当 i大于 k 时， 至少有两个所述第一射频电路所支持频段对应同一个工作电路；
所述第二选通电路为第二单刀多掷开关，所述第二单刀多掷开关的动端与 所述控制装置连接， 所述第二单刀多掷开关的 m个不动端分别连接所述第二 射频电路中的 m个工作电路， 所述 m个工作电路为所述第二射频电路所支持 的 n个频段所对应的工作电路； 其中 m和 n均为正整数， 且 n大于或等于 m; 当 n大于 m时， 至少有两个所述第二射频电路所支持的频段对应同一个工作 电路。
结合第二方面的第三种可能的实现方式，在第四种可能的实现方式中， 所 述控制装置包括第一单刀双掷开关、 第二单刀双掷开关和控制器；
所述第一单刀双掷开关的动端与所述第一单刀多掷开关的动端连接，所述 第一单刀多掷开关的 k个不动端分别连接所述第一射频电路中的 k个工作电路 所述 k个工作电路为所述第一射频电路所支持的 i个频段所对应的工作电路； 其中 i和 k均为正整数， 且 i大于或等于 k; 当 i大于 k时， 至少有两个所述第 一射频电路所支持频段对应同一个工作电路；所述第一单刀双掷开关的第一不 动端与所述第一天线连接，所述第一单刀双掷开关的第二不动端与所述第二单 刀双掷开关的第一不动端连接；
所述第二单刀双掷开关的动端与第二天线连接，所述第二单刀双掷开关的 第二不动端与所述第二单刀多掷开关的动端连接，所述第二单刀多掷开关的 m 个不动端分别连接所述第二射频电路中的 m个工作电路， 所述 m个工作电路 为所述第二射频电路所支持的 n个频段所对应的工作电路； 其中 m和 n均为 正整数， 且 n大于或等于 m; 当 n大于 m时， 至少有两个所述第二射频电路 所支持的频段对应同一个工作电路；
所述控制装置判断所述传输频段中的频率是否小于预设频率， 若为是， 则 控制所述第一射频电路与所述第二天线连接，并断开第二射频电路与所述第二 天线的连接或保持第二射频电路与所述第二天线的断路状态的步骤具体包括： 若所述传输频段小于所述预设频率，所述控制器接通所述第一单刀双掷开 关的动端与第二不动端， 且接通第二单刀双掷开关的动端与第一不动端。
结合第二方面的第四种可能的实现方式，在第五种可能的实现方式中，还 包括：
若所述传输频段中的频率小于所述预设频率，所述控制器接通所述第一单 刀双掷开关的动端与第一不动端。
本发明实施例的第三方面提供了一种移动终端，包括上述任意一种射频前 端系统。
实施本发明实施例， 具有如下有益效果：
获取所述第一射频电路选用的传输频段，若第一射频电路选用的传输频段 中的频率小于所述预设频率，将目标信号经由第二天线进行传输， 并禁止第二 射频电路进行传输，射频前端系统的第一天线只负责传输高频段的信号， 可有 效减少第一天线的尺寸， 因此降低了双天线终端对天线尺寸的需求。 附图说明
为了更清楚地说明本发明实施例或现有技术中的技术方案，下面将对实施 例或现有技术描述中所需要使用的附图作简单地介绍，显而易见地， 下面描述 中的附图仅仅是本发明的一些实施例，对于本领域普通技术人员来讲，在不付 出创造性劳动的前提下， 还可以根据这些附图获得其他的附图。 图 1是本发明第一实施例的一种射频前端系统的结构示意图； 图 2是本发明第二实施例的一种射频前端系统的结构示意图；
图 3是本发明第三实施例的一种射频前端系统的结构示意图；
图 4是本发明第四实施例的一种射频前端系统的结构示意图；
图 5 是本发明第一实施例的一种射频前端系统中信号传输控制方法的流 程示意图；
图 6 是本发明第二实施例的一种射频前端系统中信号传输控制方法的流 程示意图。 具体实施方式
下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清 楚、 完整地描述， 显然， 所描述的实施例仅仅是本发明一部分实施例， 而不是 全部的实施例。基于本发明中的实施例， 本领域普通技术人员在没有作出创造 性劳动前提下所获得的所有其他实施例， 都属于本发明保护的范围。
下述本发明实施例提供的射频前端系统和信号传输方法可以适用于支持 多种通信制式和频段的终端， 例如： 演进通用移动通信系统（ Universal Mobile Telecommunication System ， 简称 UMTS ) 陆地通信制式 ( Evolved Universal Mobile Telecommunication System Territorial Radio Access Network， 简称 E-UTRAN )、 UMTS陆地通信制式（ UMTS Territorial Radio Access Network, 简称 UTRAN )、全球移动通信系统（ Global System for Mobile Communications, 简称 GSM ) /提高数据速率的 GSM演进技术（Enhanced Data rate for GSM Evolution, 简称 EDGE )通信制式（ GSM EDGE Radio Access Network, 简称 GERAN )、 非第三代合作伙伴计划 （the 3rd Generation Partner Project, 简称 3GPP )通信制式等。
参见图 1， 为本发明第一实施例的一种射频前端系统的结构示意图， 在本 实施例中， 所述射频前端系统包括第一天线 11、 第二天线 12、 控制装置 13、 第一射频电路 14和第二射频电路 15。
第一射频电路 14和第二射频电路 15均用于将基带信号调制到高频载波上 经天线发射和将经天线接收的高频信号解调为基带信号。 第一射频电路 14支 持多个通信制式和多个频段， 可以釆用频分双工 FDD ( ( Frequency Division Duplexing ) )或时分双工进 TDD ( (Time Division Duplexing) )行收发信号， 第 二射频电路 15也支持多个通信制式和多个频段， 可以釆用频分双工或时分双 工进行收发信号。 例如， 第一射频电路 14可以支持 GSM通信制式（频段编 号： B2/B3/B5/B8 )、 UMTS通信制式（频段编号： B1/B2/B5 )、 TD-LTE通信 制式（频段编号： B38/B39/B40/B41 )、 FD-LTE模式（频段编号： B3/B7 )和 TDS通信制式（频段编号： B34/B39 )第二射频电路 14也支持上述的通信制 式和频段。 频段编号对应的上频段和下行频段可以从 3GPP TS 36.101和 TS 25.101查询，例如， UMTS B1为频分双工模式，上行频段： 1920MHz- 1980MHz; TDS B34为时分双工模式， 上行频段和下行频段相同： 2010MHz-2025MHz， GSM B2 为频分双工模式， 上行频段： 1850 - 1910MHz , 下行频段： 1930MHz- 1990MHz, 其他频段编号对应的频段此处不再赘述。
第一天线 11和第二天线 12均用于接收或发射高频信号。
控制装置 13获取第一射频电路 14选用的传输频段， 若第一射频电路 14 选用的传输频段中的频率小于所述预设频率，则控制所述第一射频电路与所述 第二天线连接，并断开第二射频电路与所述第二天线的连接或保持第二射频电 路与所述第二天线的断路状态。
具体的，控制装置 13获取第一射频电路 14选用的传输频段， 比较第一射 以是确定第一射频电路 14选用的传输频段的频率区间， 若从该频段区间中的 任意选取的频率均小于预设频率， 则确定第一射频电路 14选用的传输频段的 频率小于预设频率，反之，则大于预设频率。假设设置的预设频率为 900MHz， 控制装置 13获得第一射频电路 14选用的传输频段为 830MHz-840MHz ( B5 的上行频段）， 则确定第一射频电路 14选用的传输频段中的频率小于预设频 率， 控制装置 14控制第一射频电路 14与第二天线 12连接， 并断开第二射频 电路 15与第二天线 12的连接或保持第二射频电路 14与第二天线 12的断路状 态。
可选的， 控制装置 13还用于若第一射频电路选用的传输频段中的频率小 于预设频率， 控制第一射频电路与第一天线连接。 可以理解的是， 射频电路（第一射频电路或第二射频电路）和天线（第一 天线或第二天线）的连接或断开是针对信号传输而言的， 若射频电路和天线接 通， 则表示射频电路可通过天线传输信号， 若射频电路与天线断开， 则表示射 频电路不能通过天线收发信号。 这里所说的连接， 不一定要在物理上连通， 也 可以物理上不连通，通过辆合方式传递信号，这种方式也是本发明所指的连接。
实施本发明的实施例， 控制装置获取所述第一射频电路选用的传输频段， 若第一射频电路选用的传输频段中的频率小于预设频率，将信号经由第二天线 进行传输， 并禁止第二射频电路进行传输，射频前端系统的第一天线只负责传 输高频段的信号，可有效减少第一天线的尺寸， 因此降低双天线终端对天线尺 寸的需求。
参见图 2， 为本发明第二实施例的一种射频前端系统的结构示意图， 在本 发明中， 所述射频前端系统除包括第一天线 11、 第二天线 12、 控制装置 13、 第一射频电路 14和第二射频电路 15外， 还包括第一选通电路 16和第二选通 电路 17， 第一选通电路 16设置在控制装置 13和第一射频电路 14之间， 用于 接通第一射频电路 14的工作电路和控制装置 13的连接， 第二选通电路 17设 置在控制装置 13和第二射频电路 15之间， 用于接通第二射频电路 15的工作 电路与控制装置 13的连接； 其中， 第一射频电路 14的工作电路为第一射频电 路 14所支持的多个频段之一对应的工作电路， 每个工作电路处理第一射频电 路支持的多个频段中的一个或多个的信号； 第二射频电路 15的工作电路为第 二射频电路 15所支持的多个频段之一对应的工作电路， 每个工作电路用于处 理第二射频电路支持的多个频段中的一个或多个频段的信号。
例如，第一射频电路支持的通信制式和频段为 GSM(B2/B8)、 UTMS ( B5)、 FD-LTE(B3/B7)、 TD-LTE(B38/B40/B41)和 TDS(B34/B39)， 第一射频电路中包 括四个工作电路， 工作电路 1、 工作电路 2、 工作电路 3和工作电路 4， 其中， 工作电路 1处理 GSM(B2/B8)频段的信号， 工作电路 2处理 UTMS ( B5)频段 的信号， 工作电路 3处理 TD-LTE(B38/B40/B41)频段的信号， 工作电路 4处理 TDS(B34/B39)频段的信号， 若第一射频电路选用 B1频段的信号进行传输， 第 一选通电路 16接通第一射频电路 14的工作电路中的工作电路 1和控制装置 13的连接。 第二选通电路的工作过程与第一选通电路相同， 此处不再赘述。 优选的， 第一选通电路 16为第一单刀多掷开关， 第二选通电路 17为第二 单刀多掷开关， 第一单刀多掷开关的一个动端连接第一射频电路 14中对应的 一个工作电路， 其不动端连接控制装置 13， 第一单刀多掷开关通过闸刀接通 第一射频电路 14的工作电路与控制装置 13; 第二单刀多址开关的一个动端连 接第二射频电路 15中对应的一个工作电路， 其不动端连接控制装置 13， 第二 单刀多掷开关通过闸刀接通第二射频电路 14的工作电路与控制装置 13。
参见图 3， 为本发明第三实施例的一种射频前端系统的结构示意图， 在本 发明实施例中， 射频前端系统包括第一天线 11、 第二天线 12、 控制装置 13、 第一射频电路 14、 第二射频电路 15、 第一选通电路 16和第二选通 17， 图 3 中第一选通电路 16和第二选通电路 17均以一个单刀四掷开关为示例，第一射 频电路 14包括工作电路 141、 工作电路 142、 工作电路 143和工作电路 144， 第二射频电路 15包括工作电路 151、工作电路 152、工作电路 153和工作电路 154。 其中控制装置 13包括控制器 131、 第一单刀双掷开关 133和第二单刀双 掷开关。
上述部件的连接关系为：第一单刀双掷开关 133的动端与第一单刀多掷开 关 16的动端连接，第一单刀多掷开关 16的 4个不动端分别连接第一射频电路 14中的 4个工作电路， 第一单刀双掷开关 133的第一不动端与第一天线 11连 接，第一单刀双掷开关 133的第二不动端与第二单刀双掷开关 132的第一不动 端连接； 第二单刀双掷开关 132的动端与第二天线 12连接， 第二单刀双掷开 关 132的第二不动端连接第二单刀多掷开关 17的动端， 第二单刀多掷开关 17 的 4个不动端分别与第二射频电路 15中的 4个工作电路连接， 控制器 131分 别连接第一单刀双掷开关 131、 第二单刀双掷开关 132、 第一单刀多掷开关 16 和第二单刀多掷开关 17。
控制器 131获取第一射频电路 14选择的传输频段， 若传输频段中的频率 小于预设频率，接通第一单刀双掷开关 133的动端与第二不动端，且接通第二 单刀双掷开关 132的动端与第一不动端。
例如， 在本发明的一种实施方式中， 假设第一射频电路 14支持的通信制 式和频段为 GSM(B2/B3/B5/B8) 、 UTMS(B1/B2/B5) 、 FD-LTE(B3/B7) 、 TD-LTE(B38/B39/B40/B41)和 TDS(B34/B39)， 第二射频电路 15也支持上述通 信制式和频段， 假设预设频率为 961MHz， 若第一射频电路 14选择的传输频 段为 GSM ( B5/B8 ) 和 UTMS(B5)， 由于上述频段中的频率小于预设频率 961MHz, 上述频段的信号需要通过第二天线 12进行传输， 控制器 13会将第 一单刀双掷开关 133的动端与第二不动端接通， 同时将第二单刀双掷开关 132 的动端与第一不动端接通。 可以理解的是， 为了减少第一单刀双掷开关 133 闸刀的切换次数，在第一射频电路 14与第二天线 12处于连接状态，且第二射 频电路 15没有传输需求时，第一射频电路 14的高频信号此时也通过第二天线 12进行传输。
在本发明的另一种实施例中，控制装置也可以将同一制式的信号中的高频 部分通过第一天线传输， 低频部分通过第二天线传输， 例如， 将 UMTS通信 制式的高频 B1频段的信号通过第一天线传输， 低频 B2/B5频段的信号通过第 二天线传输。
优选的，控制器 13还用于若第一射频电路 14选用的传输频段中的频率不 小于预设频率，接通第一单刀双掷开关 133的动端与第一不动端， 第一射频电 路 14通过第一天线 11收发信号。
实施本发明的实施例， 控制装置获取所述第一射频电路选用的传输频段， 若第一射频电路选用的传输频段中的频率小于所述预设频率，将信号经由第二 天线进行传输， 并禁止第二射频电路进行传输，射频前端系统的第一天线只负 责传输高频段的信号， 可有效减少第一天线的尺寸， 因此降低双天线终端对天 线尺寸的需求。
参见图 4， 为本发明实施例的一种射频前端系统的结构示意图， 在本方实 施例中， 射频前端系统包括第一天线 11、 第二天线 12、 控制装置 13、 第一射 频电路 14、 第二射频电路 15、 第一单刀多掷开关 16和第二单刀多掷开关 17， 控制装置包括第一单刀双掷开关 133、第二单刀双掷开关 132和控制器 131(图 4未画出）， 第一单刀多掷开关 16中包括 6个工作电路， 第二单刀多掷开关 17 中包括 2个工作电路（图中未画出）， 第一单刀多掷开关 16为单刀六掷开关 ( SP6T ), 第二单刀多掷开关 17为单刀双掷开关 （SP2T )。
上述部件的连接关系为： 第一天线 11连接第一单刀双掷开关 133的第一 不动端，第一单刀双掷开关 133的第二不动端连接第二单刀双掷开关 132的第 一不动端， 第一单刀双掷开关 133的动端连接第一单刀多掷开关 16的动端， 第一单刀多掷开关 16的 6个不动端分别连接第一射频电路 14的 6个工作电路； 第二天线 12连接第二单刀双掷开关 132的动端， 其第二不动端连接第二单刀 多掷开关 17的动端，第二单刀多掷开关 17的 2个不动端分别连接第二射频电 路 15的 2个工作电路。 其中， 规定第一射频电路 14和第一天线 11之间的传 输路径为路径 1， 第一射频电路 14和第二天线 12之间的传输路径为路径 2， 第二射频电路 15和第二天线 12之间的传输路径为路径 3。
本发明实施例的射频前端系统的工作原理为：假设第一射频电路支持的通 信制式和频段为： GSM(B2/B3/B5/B8) UMTS(B1/B2/B5) FD-LTE(B3/B7) TD-LTE (B38/B39/B40/B41) TDS( B34/B39), 第二射频电路 15支持的通信制 式和频段为： GSM(B3/B8)。 通过查询频率分配表可以得出， B5和 B8频段为 分布 960MHz以下的低频频段， 将预设频率设置为 961MHz， 若第一射频电路 14选择的传输频段为 GSM ( B5/B8 )和 UTMS(B5)， 由于上述频段中的频率 小于预设频率 961MHz，上述频段的信号需要通过路径 2进行传输，控制器 13 会将第一单刀双掷开关 133的动端与第二不动端接通，同时将第二单刀双掷开 关 132的动端与第一不动端接通。
可以理解的是， 为了减少控制装置 13中第一单刀双掷开关 133的切换次 数， 在第一射频电路 14的信号通过第二天线 12 (即通过路径 2 )进行传输时， 相同通信制式的信号其他频段的信号也可通过第二天线 12 (即通过路径 2 )进 行传输， 例如， 对于 GSM通信制式的信号而言， 若在上一时刻第一射频电路 14中的 GSM ( B5/B8 )信号通过路径 2进行传输， 而在当前时刻 GSM通信制 式下需要传输 B2/B3频段的信号， 此时将 B2/B3频段的信号也经过路径 2进 行传输， 不需要控制第一单刀双掷开关 133进行切换操作，将传输路径由路径 2切换到路径 1上。同理， UMTS的 B1/B2频段的信号也经过路径 2进行传输。 因此， 在本实施例中， 若第一射频电路 14选择的传输频段中的频率不小于预 设频率 961MHz， 第一射频电路 14 支持的 FD-LTE (B3/B7) TD-LTE (B38/B39/B40/B41) TDS (B34/39)信号通过路径 1进行传输， 若第二射频电路 14选择的传输频段中的频率小于预设频率 961MHz， 则第一射频电路 14支持 GSM ( B2/B3/B5/B8 ) UTMS(B1/B2/B5)信号通过路径 2进行传输， 同时， 当 第一射频电路 14通过路径 1进行传输时，第二射频电路 15支持的 GSM(B3/B8) 信号选择路径 3进行传输。
实施本发明的实施例， 控制装置获取所述第一射频电路选用的传输频段， 若第一射频电路选用的传输频段中的频率小于所述预设频率，将信号经由第二 天线进行传输， 并禁止第二射频电路进行传输，射频前端系统的第一天线只负 责传输高频段的信号， 可有效减少第一天线的尺寸， 因此降低双天线终端对天 线尺寸的需求。
参见图 5， 为本发明第一实施例的一种射频前端系统中信号传输控制方法 的流程图， 在实施例中， 所述方法包括：
5101、 控制装置获取第一射频电路选用的传输频段。
5102、控制装置判断传输频段中的频率是否小于预设频率。 若为是， 执行 S103 , 若为否， 执行 S104。
S 103、控制第一射频电路与第二天线连接或保持第二射频电路与第二天线 的断路状态。
S104、 控制第一射频电路与第一天线连接。
若为是， 则控制所述第一射频电路与所述第二天线连接， 并断开第二射频 电路与所述第二天线的连接或保持第二射频电路与所述第二天线的断路状态。
具体的， 射频前端电路包括第一天线、 第二天线、 第一射频电路、 第二射 频电路和控制装置。本发明实施例和装置项实施例一基于同一构思， 其带来的 技术效果也相同， 具体请参照上述实施例的描述， 此处不再赘述。
实施本发明的实施例， 控制装置获取所述第一射频电路选用的传输频段， 若第一射频电路选用的传输频段中的频率小于所述预设频率，将信号经由第二 天线进行传输， 并禁止第二射频电路进行传输，射频前端系统的第一天线只负 责传输高频段的信号， 可有效减少第一天线的尺寸， 因此降低双天线终端对天 线尺寸的需求。
参见图 6， 为本发明第二实施例的一种射频前端系统中信号传输控制方法 的流程示意图， 在本实施例中， 所述方法包括：
5201、 控制装置获取第一射频电路选用的传输频段。
5202、控制装置中的控制器判断传输频段中的频率是否小于预设频率。若 判断为是， 执行 S203， 否则， 执行 S204。
5203、控制器接通第一单刀双掷开关的动端与第二不动端，且接通第二单 刀双掷开关的动端与不动端。
5204、 控制器接通第一单刀双掷开关的动端与第一不动端。
在本发明实施例中，射频前端系统还包括： 第一单刀多掷开关和第二单刀 多掷开关。 第一单刀多掷开关的动端与控制装置连接， 第一单刀多掷开关的 k 个不动端分别连接第一射频电路中的 k个工作电路， k个工作电路为第一射频 电路所支持的 i个频段所对应的工作电路； 其中 i和 k均为正整数， 且 i大于 或等于 k; 当 i大于 k时， 至少有两个第一射频电路所支持频段对应同一个工 作电路。
第二单刀多掷开关的动端与控制装置连接， 第二单刀多掷开关的 m个不 动端分别连接第二射频电路中的 m个工作电路， m个工作电路为第二射频电 路所支持的 n个频段所对应的工作电路； 其中 m和 n均为正整数， 且 n大于 或等于 m; 当 n大于 m时， 至少有两个第二射频电路所支持的频段对应同一 个工作电路。
控制装置包括第一单刀双掷开关、第二单刀双掷开关和控制器； 第一单刀 双掷开关的动端通过第一单刀多掷开关与第一射频电路的工作电路连接，其第 一不动端与第一天线连接，其第二不动端与第二单刀双掷开关的第一不动端连 接； 第二单刀双掷开关的动端与第二天线连接，其第二不动端连接通过第二单 刀多掷开关与第二射频电路的工作电路连接。
本发明实施例和装置项实施例二和三基于同一构思，其带来的技术效果也 相同， 具体请参照上述实施例的描述， 此处不再赘述。
实施本发明的实施例， 控制装置获取所述第一射频电路选用的传输频段， 若第一射频电路选用的传输频段中的频率小于所述预设频率，将信号经由第二 天线进行传输， 并禁止第二射频电路进行传输，射频前端系统的第一天线只负 责传输高频段的信号， 可有效减少第一天线的尺寸， 因此降低双天线终端对天 线尺寸的需求。
本领域普通技术人员可以理解实现上述实施例方法中的全部或部分流程， 是可以通过计算机程序来指令相关的硬件来完成，所述的程序可存储于一计算 机可读取存储介质中，该程序在执行时，可包括如上述各方法的实施例的流程。 其中，所述的存储介质可为磁碟、光盘、只读存储记忆体（Read-Only Memory, ROM )或随机存储记忆体（Random Access Memory, RAM )等。
以上所揭露的仅为本发明一种较佳实施例而已，当然不能以此来限定本发 明之权利范围，本领域普通技术人员可以理解实现上述实施例的全部或部分流 程， 并依本发明权利要求所作的等同变化， 仍属于发明所涵盖的范围。

Claims

权 利 要 求
1、 一种射频前端系统， 其特征在于， 包括： 第一天线、 第二天线、 第一 射频电路、 第二射频电路和控制装置；
所述控制装置用于获取所述第一射频电路选用的传输频段，若所述第一射 频电路选用的传输频段中的频率小于预设频率，则控制所述第一射频电路与所 述第二天线连接，并断开第二射频电路与所述第二天线的连接或保持第二射频 电路与所述第二天线的断路状态。
2、 如权利要求 1所述的射频前端系统， 其特征在于， 所述控制装置还用 于若所述第一射频电路选用的传输频段中的频率不小于预设频率，控制所述第 一射频电路与所述第一天线连接。
3、 如权利要求 1所述的射频前端系统， 其特征在于， 还包括：
第一选通电路，用于接通所述第一射频电路的工作电路和所述控制装置的 连接； 和
第二选通电路，用于接通所述第二射频电路的工作电路与所述控制装置的 连接；
其中，所述第一射频电路的工作电路为所述第一射频电路所支持的多个频 段之一对应的工作电路；所述第二射频电路的工作电路为所述第二射频电路所 支持的多个频段之一对应的工作电路；
所述控制装置具体用于获取所述第一射频电路的工作电路对应的频段，若 所述第一射频电路的工作电路对应的频段中的频率小于所述预设频率，则控制 所述第一射频电路的工作电路与所述第二天线连接，并断开第二射频电路的工 作电路与所述第二天线的连接或保持第二射频电路的工作电路与所述第二天 线的断路状态。
4、 如权利要求 3所述的射频前端系统， 其特征在于， 所述第一选通电路 为第一单刀多掷开关， 所述第一单刀多掷开关的动端与所述控制装置连接， 所 述第一单刀多掷开关的 k个不动端分别连接所述第一射频电路中的 k个工作电 路， 所述 k个工作电路为所述第一射频电路所支持的 i个频段所对应的工作电 路； 其中 i和 k均为正整数， 且 i大于或等于 k; 当 i大于 k时， 至少有两个所 述第一射频电路所支持频段对应同一个工作电路；
所述第二选通电路为第二单刀多掷开关，所述第二单刀多掷开关的动端与 所述控制装置连接， 所述第二单刀多掷开关的 m个不动端分别连接所述第二 射频电路中的 m个工作电路， 所述 m个工作电路为所述第二射频电路所支持 的 n个频段所对应的工作电路； 其中 m和 n均为正整数， 且 n大于或等于 m; 当 n大于 m时， 至少有两个所述第二射频电路所支持的频段对应同一个工作 电路。
5、 如权利要求 4所述的射频前端系统， 其特征在于， 所述控制装置包括 第一单刀双掷开关、 第二单刀双掷开关和控制器；
所述第一单刀双掷开关的动端与所述第一单刀多掷开关的动端连接，所述 第一单刀多掷开关的 k个不动端分别连接所述第一射频电路中的 k个工作电路 所述 k个工作电路为所述第一射频电路所支持的 i个频段所对应的工作电路； 其中 i和 k均为正整数， 且 i大于或等于 k; 当 i大于 k时， 至少有两个所述第 一射频电路所支持频段对应同一个工作电路；所述第一单刀双掷开关的第一不 动端与所述第一天线连接，所述第一单刀双掷开关的第二不动端与所述第二单 刀双掷开关的第一不动端连接；
所述第二单刀双掷开关的动端与第二天线连接，所述第二单刀双掷开关的 第二不动端与所述第二单刀多掷开关的动端连接，所述第二单刀多掷开关的 m 个不动端分别连接所述第二射频电路中的 m个工作电路， 所述 m个工作电路 为所述第二射频电路所支持的 n个频段所对应的工作电路； 其中 m和 n均为 正整数， 且 n大于或等于 m; 当 n大于 m时， 至少有两个所述第二射频电路 所支持的频段对应同一个工作电路；
所述控制器具体用于获取所述第一射频电路选择的传输频段，若所述传输 频段中的频率小于所述预设频率，接通所述第一单刀双掷开关的动端与第二不 动端， 且接通第二单刀双掷开关的动端与第一不动端。
6、 如权利要求 5所述的射频前端系统， 其特征在于， 所述控制器还用于 若所述传输频段中的频率不小于所述预设频率，接通所述第一单刀双掷开关的 动端与第一不动端。
7、 一种射频前端系统中信号传输控制方法， 其特征在于， 所述射频前端 系统包括： 第一天线、 第二天线、 第一射频电路、 第二射频电路和控制装置； 所述信号传输控制方法包括：
所述控制装置获取第一射频电路选用的传输频段；
所述控制装置判断所述传输频段中的频率是否小于预设频率， 若为是， 则 控制所述第一射频电路与所述第二天线连接，并断开第二射频电路与所述第二 天线的连接或保持第二射频电路与所述第二天线的断路状态。
8、 如权利要求 7所述的方法， 其特征在于， 还包括：
若所述控制装置判断所述第一射频电路选用的传输频段不小于所述预设 频率， 控制所述第一射频电路与所述第一天线连接。
9、 如权利要求 7所述的方法， 其特征在于， 还包括：
控制第一选通电路接通所述第一射频电路的工作电路和所述控制装置的 连接； 和
控制第二选通电路接通所述第二射频电路的工作电路与所述控制装置的 连接； 其中， 所述第一射频电路的工作电路为所述第一射频电路所支持的多个 频段之一对应的工作电路；所述第二射频电路的工作电路为所述第二射频电路 所支持的多个频段之一对应的工作电路。
10、 如权利要求 9所述的方法， 其特征在于， 所述第一选通电路为第一单 刀多掷开关， 所述第一单刀多掷开关的动端与所述控制装置连接， 所述第一单 刀多掷开关的 k个不动端分别连接所述第一射频电路中的 k个工作电路所述 k 个工作电路为所述第一射频电路所支持的 i个频段所对应的工作电路； 其中 i 和 k均为正整数， 且 i大于或等于 k; 当 i大于 k时， 至少有两个所述第一射 频电路所支持频段对应同一个工作电路；
所述第二选通电路为第二单刀多掷开关，所述第二单刀多掷开关的动端与 所述控制装置连接， 所述第二单刀多掷开关的 m个不动端分别连接所述第二 射频电路中的 m个工作电路， 所述 m个工作电路为所述第二射频电路所支持 的 n个频段所对应的工作电路； 其中 m和 n均为正整数， 且 n大于或等于 m; 当 n大于 m时， 至少有两个所述第二射频电路所支持的频段对应同一个工作 电路。
11、 如权利要求 10所述的方法， 其特征在于， 所述控制装置包括第一单 刀双掷开关、 第二单刀双掷开关和控制器；
所述第一单刀双掷开关的动端与所述第一单刀多掷开关的动端连接，所述 第一单刀多掷开关的 k个不动端分别连接所述第一射频电路中的 k个工作电 路， 所述 k个工作电路为所述第一射频电路所支持的 i个频段所对应的工作电 路； 其中 i和 k均为正整数， 且 i大于或等于 k; 当 i大于 k时， 至少有两个所 述第一射频电路所支持频段对应同一个工作电路；所述第一单刀双掷开关的第 一不动端与所述第一天线连接，所述第一单刀双掷开关的第二不动端与所述第 二单刀双掷开关的第一不动端连接；
所述第二单刀双掷开关的动端与第二天线连接，所述第二单刀双掷开关的 第二不动端与所述第二单刀多掷开关的动端连接，所述第二单刀多掷开关的 m 个不动端分别连接所述第二射频电路中的 m个工作电路， 所述 m个工作电路 为所述第二射频电路所支持的 n个频段所对应的工作电路； 其中 m和 n均为 正整数， 且 n大于或等于 m; 当 n大于 m时， 至少有两个所述第二射频电路 所支持的频段对应同一个工作电路；
所述控制装置判断所述传输频段中的频率是否小于预设频率， 若为是， 则 控制所述第一射频电路与所述第二天线连接，并断开第二射频电路与所述第二 天线的连接或保持第二射频电路与所述第二天线的断路状态的步骤具体包括： 若所述传输频段小于所述预设频率，所述控制器接通所述第一单刀双掷开 关的动端与第二不动端， 且接通第二单刀双掷开关的动端与第一不动端。
12、 如权利要求 11所述的方法， 其特征在于， 还包括：
若所述传输频段中的频率小于所述预设频率，所述控制器接通所述第一单 刀双掷开关的动端与第一不动端。
13、 一种移动终端， 其特征在于， 包括如权利要求 7-12任意一项所述的 射频前端系统。
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