WO2021109240A1 - 射频架构及移动终端 - Google Patents

射频架构及移动终端 Download PDF

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Publication number
WO2021109240A1
WO2021109240A1 PCT/CN2019/125939 CN2019125939W WO2021109240A1 WO 2021109240 A1 WO2021109240 A1 WO 2021109240A1 CN 2019125939 W CN2019125939 W CN 2019125939W WO 2021109240 A1 WO2021109240 A1 WO 2021109240A1
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WIPO (PCT)
Prior art keywords
radio frequency
gps
duplexer
filter
switch
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PCT/CN2019/125939
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English (en)
French (fr)
Inventor
贾宇
温鼎宁
张华�
陶龙西
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惠州Tcl移动通信有限公司
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Application filed by 惠州Tcl移动通信有限公司 filed Critical 惠州Tcl移动通信有限公司
Priority to US17/621,756 priority Critical patent/US20220350029A1/en
Publication of WO2021109240A1 publication Critical patent/WO2021109240A1/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
    • H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
    • H04B1/40—Circuits
    • H04B1/401—Circuits for selecting or indicating operating mode
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S19/00—Satellite radio beacon positioning systems; Determining position, velocity or attitude using signals transmitted by such systems
    • G01S19/01—Satellite radio beacon positioning systems transmitting time-stamped messages, e.g. GPS [Global Positioning System], GLONASS [Global Orbiting Navigation Satellite System] or GALILEO
    • G01S19/13—Receivers
    • G01S19/21—Interference related issues ; Issues related to cross-correlation, spoofing or other methods of denial of service
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S19/00—Satellite radio beacon positioning systems; Determining position, velocity or attitude using signals transmitted by such systems
    • G01S19/01—Satellite radio beacon positioning systems transmitting time-stamped messages, e.g. GPS [Global Positioning System], GLONASS [Global Orbiting Navigation Satellite System] or GALILEO
    • G01S19/13—Receivers
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S19/00—Satellite radio beacon positioning systems; Determining position, velocity or attitude using signals transmitted by such systems
    • G01S19/01—Satellite radio beacon positioning systems transmitting time-stamped messages, e.g. GPS [Global Positioning System], GLONASS [Global Orbiting Navigation Satellite System] or GALILEO
    • G01S19/13—Receivers
    • G01S19/35—Constructional details or hardware or software details of the signal processing chain
    • G01S19/36—Constructional details or hardware or software details of the signal processing chain relating to the receiver frond end
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S19/00—Satellite radio beacon positioning systems; Determining position, velocity or attitude using signals transmitted by such systems
    • G01S19/38—Determining a navigation solution using signals transmitted by a satellite radio beacon positioning system
    • G01S19/39—Determining a navigation solution using signals transmitted by a satellite radio beacon positioning system the satellite radio beacon positioning system transmitting time-stamped messages, e.g. GPS [Global Positioning System], GLONASS [Global Orbiting Navigation Satellite System] or GALILEO
    • G01S19/42—Determining position
    • 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
    • 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
    • H04B1/0067—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 one or more circuit blocks in common for different bands
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/0404—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas the mobile station comprising multiple antennas, e.g. to provide uplink diversity
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0602—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using antenna switching

Definitions

  • This application belongs to the field of terminals, and in particular relates to a radio frequency architecture and a mobile terminal.
  • LTE_B13 Long Term Evolution (LTE (Long Term Evolution) band13 frequency band] band need to implement GPS (global Position System, global positioning system) function, it is necessary to install separate antennas on the RF channel and GPS channel.
  • GPS global Position System, global positioning system
  • the LTE_B13 main wave signal is transmitted through the power amplifier, duplexer, radio frequency module, switch to the main antenna and diversity antenna, and the information received by the GPS antenna needs to be filtered by the GPS filter.
  • This application provides a radio frequency architecture and a mobile terminal to reduce the interference of the radio frequency channel to the GPS channel.
  • the present application provides a radio frequency architecture, including: a GPS channel, the GPS channel includes a GPS antenna and a GPS filter, the GPS filter is a high-pass filter; a first radio frequency channel, It includes a power amplifier, a first duplexer, a radio frequency module, and a switch that are connected in sequence, and a first main antenna and a diversity antenna that are all connected to the switch; and a second radio frequency path, which includes the power amplifier and the second radio frequency path that are connected in sequence.
  • Two duplexers, filters and second main antenna are used to the GPS filter.
  • the switch is a double-pole double-throw switch.
  • the switch is a non-linear device.
  • the radio frequency module is a non-linear device.
  • the filter is a low-pass filter.
  • the second duplexer is a B13 duplexer.
  • the present application provides a radio frequency architecture, including: a GPS path; a first radio frequency path, including a power amplifier, a first duplexer, a radio frequency module, and a switch connected in sequence, and the The first main antenna and the diversity antenna connected by the switch; and a second radio frequency path, including the power amplifier, the second duplexer, the filter and the second main antenna connected in sequence.
  • the GPS path includes a GPS antenna and a GPS filter.
  • the GPS filter is a high-pass filter.
  • the switch is a double-pole double-throw switch.
  • the switch is a non-linear device.
  • the radio frequency module is a non-linear device.
  • the filter is a low-pass filter.
  • twice the transmission frequency of the second duplexer is a GPS frequency band.
  • the present application provides a mobile terminal including any of the above radio frequency architectures.
  • the embodiment of the present application provides a radio frequency architecture and a mobile terminal.
  • the LTE_B13 main wave signal is output by the power amplifier and passes through the B13 duplexer without passing through any Non-linear devices are directly emitted by the second main antenna, so that the B13 main wave and the second harmonic of B13 affect the GPS channel only by the coupling between the antennas, which greatly reduces the interference of the radio frequency channel to the GPS channel.
  • FIG. 1 is a schematic structural diagram of a radio frequency architecture provided by an embodiment of the present application.
  • Fig. 2 is a schematic structural diagram of a mobile terminal provided by an embodiment of the present application.
  • the present application provides a radio frequency architecture, including a GPS channel 10, a GPS antenna 110, a GPS filter 120, a first radio frequency channel 20, a power amplifier 210, a first duplexer 220, a radio frequency module 230, and a switch 240, a first main antenna 250, a diversity antenna 260, a second radio frequency path 30, a second duplexer 310, a filter 320, and a second main antenna 330.
  • the GPS path 10 may include a GPS antenna 110 and a GPS filter 120.
  • the GPS antenna 110 is used to receive GPS signals.
  • the center frequency of the GPS signal is 1572.82MHz.
  • the GPS filter 120 is a high-pass filter.
  • a high-pass filter also known as a low-cut filter or a low-cut filter, is a filter that allows frequencies higher than a certain cut-off frequency to pass, while greatly attenuating lower frequencies.
  • the high-pass filter can remove unnecessary low-frequency components in the signal, or remove low-frequency interference.
  • the power amplifier 210 refers to an amplifier that can generate the maximum power output to drive a certain load under a given distortion rate.
  • the radio frequency module 230 is used to transmit analog and digital signals.
  • the radio frequency module 230 is a non-linear device.
  • the switch 240 is a double-pole double-throw switch, which is used to switch between the first main antenna 250 and the diversity antenna 260.
  • the switch 240 is a non-linear device.
  • the second radio frequency path 30 includes a power amplifier 210, a second duplexer 310, a filter 320, and a second main antenna 330 connected in sequence.
  • the second duplexer 310 may be a B13 duplexer.
  • the transmission frequency of the second duplexer 310 is 777-787 MHz.
  • the transmission frequency of the second duplexer 310 is twice the GPS frequency band.
  • the filter 320 is a low-pass filter.
  • a low-pass filter also known as a high-cut filter or a high-cut filter, is a filter that allows frequencies below a certain cut-off frequency to pass while greatly attenuating higher frequencies.
  • the low-pass filter can remove unnecessary high-frequency components in the signal, or remove high-frequency interference.
  • the filter 320 is used to filter out the second harmonic of B13.
  • the second main antenna 330 is used to transmit the B13 signal.
  • the present application provides a mobile terminal 2, which includes the radio frequency architecture 1 as described above.
  • the mobile terminal 2 may be a product such as a mobile phone, a tablet computer, a notebook computer, and a navigator.
  • the LTE_B13 main wave signal is output by the power amplifier after passing through the B13 duplexer, and is directly transmitted by the second main antenna without any nonlinear components, so that the B13 main wave and The second harmonic of B13 only has the coupling between the antennas, which greatly reduces the interference of the radio frequency path to the GPS path.

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  • Engineering & Computer Science (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Transceivers (AREA)

Abstract

本申请公开了一种射频架构及移动终端。本申请通过单独设置B13双工器的射频通路，使得LTE_B13主波信号由功率放大器输出经过B13双工器后，不经过任何非线性器件，直接由第二主天线发射出去，从而B13主波和B13二次谐波对GPS通路的影响只存在天线之间的耦合，极大地减小射频通路对GPS通路的干扰。

Description

射频架构及移动终端
本申请要求于2019年12月5日提交中国专利局、申请号为201911235791.5、发明名称为“射频架构及移动终端”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请属于终端领域，尤其涉及一种射频架构及移动终端。
 背景技术
现有支持LTE_B13[LTE（Long Term Evolution，长期演进）的band13频段]频段的手机需要实现GPS（global Position System，全球定位***）功能时，需在射频通路和GPS通路上分别设置独立的天线。此时，LTE_B13主波信号经过功率放大器、双工器、射频模块、开关至主集天线和分集天线发射，GPS天线接收的信息需要经过GPS滤波器进行滤波。
其中，LTE_B13发射频率为777-787MHz，GPS接收信号的中心频率为1572.82MHz。目前的GPS天线和分集天线都设置在手机的上方，而且彼此距离比较短。在LTE_B13频段和GPS同时工作时，GPS的干扰源来自两点：一点是在射频通路上由LTE_B13频段的信号经过射频模块、开关等非线性器件时会产生二次谐波，并且通过分集天线发射出去。由于目前商用的双工器在GPS频段的隔离度较低不能完全滤除二次谐波，这个信号通过GPS天线耦合进入GPS通路中直接造成GPS的干扰；另一点是开关（双刀双掷开关，用于实现上下天线切换）的隔离度大概为25dB。也就是说，当B13双工器以最大功率发射之际，会有大概0dBm的功率经由开关进入分级天线，同时伴随着LTE_B13频段的二次谐波。上述两种情况产生的二次谐波会导致GPS无法定位或无法正确定位。
 技术问题
本申请提供一种射频架构及移动终端，以降低射频通路对GPS通路的干扰。
 技术解决方案
根据本申请的第一方面，本申请提供一种射频架构，包括：一GPS通路，所述GPS通路包括GPS天线以及GPS滤波器，所述GPS滤波器为高通滤波器；一第一射频通路，包括依次连接的功率放大器、第一双工器、射频模块和开关以及均与所述开关相连的第一主天线和分集天线；以及一第二射频通路，包括依次连接的所述功率放大器、第二双工器、滤波器以及第二主天线。
进一步地，所述开关为双刀双掷开关。
进一步地，所述开关为非线性器件。
进一步地，所述射频模块为非线性器件。
进一步地，所述滤波器为低通滤波器。
进一步地，所述第二双工器为B13双工器。
进一步地，所述第二双工器发射频率的2倍为GPS频段。
根据本申请的第二方面，本申请提供一种射频架构，包括：一GPS通路；一第一射频通路，包括依次连接的功率放大器、第一双工器、射频模块和开关以及均与所述开关相连的第一主天线和分集天线；以及一第二射频通路，包括依次连接的所述功率放大器、第二双工器、滤波器以及第二主天线。
进一步地，所述GPS通路包括GPS天线以及GPS滤波器。
进一步地，所述GPS滤波器为高通滤波器。
进一步地，所述开关为双刀双掷开关。
进一步地，所述开关为非线性器件。
进一步地，所述射频模块为非线性器件。
进一步地，所述滤波器为低通滤波器。
进一步地，所述第二双工器为B13双工器。
进一步地，所述第二双工器发射频率的2倍为GPS频段。
根据本申请的第三方面，本申请提供一种移动终端，包括任一上述的射频架构。
 有益效果
相较于现有技术，本申请实施例提供一种射频架构及移动终端，通过单独设置B13双工器的射频通路，使得LTE_B13主波信号由功率放大器输出经过B13双工器后，不经过任何非线性器件，直接由第二主天线发射出去，从而B13主波和B13二次谐波对GPS通路的影响只存在天线之间的耦合，极大地减小射频通路对GPS通路的干扰。
 附图说明
图1是本申请实施例提供的一种射频架构的结构示意图。
图2是本申请实施例提供的一种移动终端的结构示意图。
 本发明的实施方式
下面将结合本申请实施例中的附图，对本申请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申请一部分实施例，而不是全部的实施例。基于本申请中的实施例，本领域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，都属于本申请保护的范围。
本申请的说明书和权利要求书以及上述附图中的术语“第一”、“第二”、“第三”等（如果存在）是用于区别类似的对象，而不必用于描述特定的顺序或先后次序。应当理解，这样描述的对象在适当情况下可以互换。此外，术语“包括”和“具有”以及他们的任何变形，意图在于覆盖不排他的包含。
在具体实施方式中，下文论述的附图以及用来描述本申请公开的原理的各实施例仅用于说明，而不应解释为限制本申请公开的范围。所属领域的技术人员将理解，本申请的原理可在任何适当布置的***中实施。将详细说明示例性实施方式，在附图中示出了这些实施方式的实例。此外，将参考附图详细描述根据示例性实施例的终端。附图中的相同附图标号指代相同的元件。
本具体实施方式中使用的术语仅用来描述特定实施方式，而并不意图显示本申请的概念。除非上下文中有明确不同的意义，否则，以单数形式使用的表达涵盖复数形式的表达。在本申请说明书中，应理解，诸如“包括”、“具有”以及“含有”等术语意图说明存在本申请说明书中揭示的特征、数字、步骤、动作或其组合的可能性，而并不意图排除可存在或可添加一个或多个其他特征、数字、步骤、动作或其组合的可能性。附图中的相同参考标号指代相同部分。
如图1所示，本申请提供一种射频架构，包括GPS通路10、GPS天线110、GPS滤波器120、第一射频通路20、功率放大器210、第一双工器220、射频模块230、开关240、第一主天线250、分集天线260、第二射频通路30、第二双工器310、滤波器320以及第二主天线330。
在本申请实施例中，GPS通路10可以包括GPS天线110和GPS滤波器120。
其中，GPS天线110用于接受GPS信号。GPS信号的中心频率为1572.82MHz。
在本申请实施例中，GPS滤波器120为高通滤波器。高通滤波器，又称低截止滤波器、低阻滤波器，允许高于某一截频的频率通过，而大大衰减较低频率的一种滤波器。高通滤波器能够去掉信号中不必要的低频成分，或者说去掉低频干扰。
在本申请实施例中，第一射频通路20包括依次连接的功率放大器210、第一双工器220、射频模块230和开关240以及均与开关240相连的第一主天线250和分集天线260。
功率放大器210是指在给定失真率条件下，能产生最大功率输出以驱动某一负载的放大器。
第一双工器220包括但不限于B2双工器或B25双工器。其中双工器的作用是将发射和接收讯号相隔离，保证接收和发射都能同时正常工作。
射频模块230用于传输模拟和数字信号。射频模块230为非线性器件。
在本申请实施例中，开关240为双刀双掷开关，用于实现第一主天线250和分集天线260的切换。具体地，开关240为非线性器件。
在本申请实施例中，第二射频通路30包括依次连接的功率放大器210、第二双工器310、滤波器320以及第二主天线330。
第二双工器310可以为B13双工器。第二双工器310的发射频率为777-787MHz。第二双工器310发射频率的2倍为GPS频段。
在本申请实施例中，滤波器320为低通滤波器。低通滤波器，又称高截止滤波器、高阻滤波器，允许低于某一截频的频率通过，而大大衰减较高频率的一种滤波器。低通滤波器可以去掉信号中不必要的高频成分，或者说去掉高频干扰。滤波器320用于滤除B13的二次谐波。
第二主天线330用于发射B13信号。
在本实施例中，由于通过单独设置B13双工器的射频通路，使得LTE_B13主波信号由功率放大器输出经过B13双工器后，不经过任何非线性器件（例如图1所示的开关240和射频模块230），直接由第二主天线发射出去，因此，B13主波和B13二次谐波对GPS通路的影响只存在天线之间的耦合，从而能够减小射频通路对GPS通路的干扰。
如图2，本申请提供一种移动终端2，包括如上所述的射频架构1。所述移动终端2可以为：手机、平板电脑、笔记本电脑、导航仪等产品。
本申请通过单独设置B13双工器的射频通路，使得LTE_B13主波信号由功率放大器输出经过B13双工器后，不经过任何非线性器件，直接由第二主天线发射出去，从而B13主波和B13二次谐波对GPS通路的影响只存在天线之间的耦合，极大地减小射频通路对GPS通路的干扰。
以上对本申请实施例所提供的一种射频架构及移动终端进行了详细介绍，本文中应用了具体个例对本申请的原理及实施方式进行了阐述，以上实施例的说明只是用于帮助理解本申请的方法及其核心思想；同时，对于本领域的技术人员，依据本申请的思想，在具体实施方式及应用范围上均会有改变之处，综上所述，本说明书内容不应理解为对本申请的限制。

Claims (17)

  1. 一种射频架构，其包括：
    一GPS通路，所述GPS通路包括GPS天线以及GPS滤波器，所述GPS滤波器为高通滤波器；
    一第一射频通路，包括依次连接的功率放大器、第一双工器、射频模块和开关以及均与所述开关相连的第一主天线和分集天线；以及
    一第二射频通路，包括依次连接的所述功率放大器、第二双工器、滤波器以及第二主天线。
  2. 根据权利要求1所述的射频架构，其中所述开关为双刀双掷开关。
  3. 根据权利要求2所述的射频架构，其中所述开关为非线性器件。
  4. 根据权利要求1所述的射频架构，其中所述射频模块为非线性器件。
  5. 根据权利要求1所述的射频架构，其中所述滤波器为低通滤波器。
  6. 根据权利要求1所述的射频架构，其中所述第二双工器为B13双工器。
  7. 根据权利要求1所述的射频架构，其中所述第二双工器发射频率的2倍为GPS频段
  8. 一种射频架构，其包括：
    一GPS通路；
    一第一射频通路，包括依次连接的功率放大器、第一双工器、射频模块和开关以及均与所述开关相连的第一主天线和分集天线；以及
    一第二射频通路，包括依次连接的所述功率放大器、第二双工器、滤波器以及第二主天线。
  9. 根据权利要求8所述的射频架构，其中所述GPS通路包括GPS天线以及GPS滤波器。
  10. 根据权利要求9所述的射频架构，其中所述GPS滤波器为高通滤波器。
  11. 根据权利要求8所述的射频架构，其中所述开关为双刀双掷开关。
  12. 根据权利要求11所述的射频架构，其中所述开关为非线性器件。
  13. 根据权利要求8所述的射频架构，其中所述射频模块为非线性器件。
  14. 根据权利要求8所述的射频架构，其中所述滤波器为低通滤波器。
  15. 根据权利要求8所述的射频架构，其中所述第二双工器为B13双工器。
  16. 根据权利要求8所述的射频架构，其中所述第二双工器发射频率的2倍为GPS频段。
  17. 一种移动终端，其包括任一如权利要求8所述的射频架构。
PCT/CN2019/125939 2019-12-05 2019-12-17 射频架构及移动终端 WO2021109240A1 (zh)

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