WO2013063931A1 - 双工放大模块、射频前端模块和多模终端 - Google Patents

双工放大模块、射频前端模块和多模终端 Download PDF

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Publication number
WO2013063931A1
WO2013063931A1 PCT/CN2012/076374 CN2012076374W WO2013063931A1 WO 2013063931 A1 WO2013063931 A1 WO 2013063931A1 CN 2012076374 W CN2012076374 W CN 2012076374W WO 2013063931 A1 WO2013063931 A1 WO 2013063931A1
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Prior art keywords
signal
module
output
duplex
amplification module
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PCT/CN2012/076374
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English (en)
French (fr)
Inventor
马凯
范景云
何莉媛
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中兴通讯股份有限公司
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Publication of WO2013063931A1 publication Critical patent/WO2013063931A1/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
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
    • H03F3/20—Power amplifiers, e.g. Class B amplifiers, Class C amplifiers
    • H03F3/24—Power amplifiers, e.g. Class B amplifiers, Class C amplifiers of transmitter output stages
    • 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
    • H04B1/02—Transmitters
    • H04B1/04—Circuits
    • H04B1/0475—Circuits with means for limiting noise, interference or distortion
    • 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
    • H04B1/50—Circuits using different frequencies for the two directions of communication
    • H04B1/52—Hybrid arrangements, i.e. arrangements for transition from single-path two-direction transmission to single-direction transmission on each of two paths or vice versa
    • H04B1/525—Hybrid arrangements, i.e. arrangements for transition from single-path two-direction transmission to single-direction transmission on each of two paths or vice versa with means for reducing leakage of transmitter signal into the receiver
    • 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
    • H04B1/02—Transmitters
    • H04B1/04—Circuits
    • H04B2001/0408—Circuits with power amplifiers

Definitions

  • Duplex amplification module Duplex amplification module, RF front-end module and multi-mode terminal
  • the present invention relates to mobile communication technologies, and in particular, to a duplex amplification module, a multimode terminal, an RF front end module, a multimode RF transceiver chip, and a method for transmitting signals by a multimode terminal.
  • the RF front end of the mobile terminal is a key device for signal transmission and reception.
  • the RF front-end is responsible for the transmission and reception of multiple modes of multi-mode signals.
  • 3G 3rd Generation Mobile Telecommunications
  • LTE Long Term Evolution
  • the mainstream systems mainly include Global System for Mobile Communication (GSM), Code Division Multiple Access (CDMA) systems, and Wideband Code Division Multiple Access (WCDMA) systems.
  • GSM Global System for Mobile Communication
  • CDMA Code Division Multiple Access
  • WCDMA Wideband Code Division Multiple Access
  • TD-SCDMA Time Division-Synchronous Code Division Multiple Access
  • the traditional GSM/WCDMA dual-mode terminal includes a main antenna, an antenna matching, an antenna switch module, a duplexer, a Radio Frequency Power Amplifier (RFPA), a Surface Acoustic Wave (SAW) filter, RF transceiver chip (transceiver) and so on.
  • RFPA Radio Frequency Power Amplifier
  • SAW Surface Acoustic Wave
  • the receiving and receiving behaviors of the WCDMA system and the GSM system are performed separately.
  • the receiving behavior of the GSM system is to receive signals through the GSM main antenna through the matching circuit to the antenna switch module module and then through the SAW filter to the radio transceiver chip (transceiver) for signal processing.
  • the transmitting behavior of the GSM system is to transmit the signal to the RFPA through the RF transceiver chip and then transmit it to the GSM main antenna via the antenna switch module and the matching circuit.
  • the receiving behavior of the WCDMA system is received by the WCDMA main antenna via the matching circuit.
  • the antenna switch module to the duplexer converts to the receiving path and then to the RF transceiver chip for signal processing.
  • the transmitting behavior of the WCDMA system is output by the RF transceiver chip (transceiver) to the duplexer and then to the antenna switch module, matching
  • the circuit is transmitted by the WCDMA main antenna.
  • the GSM main antenna and the WCDMA main antenna can be combined As one, it can also be designed separately.
  • the transceiver transceivers of WCDMA system and GSM system can be synthesized or independent.
  • FIG. 1 it is a schematic diagram of an existing GSM/WCDMA dual-mode terminal.
  • the receiving behavior of the WCDMA band 1 system is to receive signals through the main antenna 101 via the antenna switch module 102 to the duplexer 107.
  • the RF transceiver chip 113 is entered;
  • the transmitting behavior of the WCDMA bandl system is that the RF transceiver chip 113 transmits an output signal to the RF amplifier 110, and after the signal is amplified, it enters the duplexer 107 and enters the antenna switch module 102.
  • the main antenna 101 The emission behavior of the GSM high-frequency system is that the RF transceiver chip 113 inputs the GSM high-frequency signal to the RF amplifier 105 of the corresponding frequency band and then transmits it by the main antenna 101 via the antenna switch module 102.
  • the receiving behavior of the GSM high-frequency system is performed by the main The antenna 101 receives the signal, transmits it to the antenna switch module 102 via the channel, filters it through the surface acoustic filter 103, and finally reaches the RF transceiver chip 113.
  • the WCDMA and GSM transceiver systems in other frequency bands work similarly to the above description.
  • the embodiment of the invention provides a method for transmitting signals by a duplex amplification module, a radio frequency front end module, a multimode terminal, a multimode radio transceiver chip and a multimode terminal, so as to solve the problem that the existing multimode terminal has higher complexity and integration. Low problem.
  • An embodiment of the present invention provides a duplex amplification module, which is applied to a transceiver channel of a multimode terminal, where the duplex amplification module includes a power amplifier and a duplexer, where:
  • the power amplifier is configured to: amplify a signal of any one of at least two frequency bands of the input mode signals and output the signal to the duplexer;
  • the duplexer is configured to: output a signal amplified from the power amplifier; and/or, filter a signal of any one of at least two frequency bands of the received various mode signals, and output.
  • the duplex amplification module further includes a low frequency duplex amplification module, wherein: The power amplifier is configured to: amplify a signal of any one of at least two frequency bands of the input low frequency transmission signal of the plurality of mode signals, and output the signal to the duplexer.
  • the duplexer comprises a transmit filter and a receive filter, wherein:
  • the transmit filter is configured to: be coupled to the power amplifier, and output a low frequency transmit signal amplified from the power amplifier;
  • the receiving filter is configured to: filter and output a signal of any one of at least two frequency bands of the low frequency received signal of the received various mode signals.
  • the duplex amplification module further includes a high frequency duplex amplification module, wherein: the power amplifier is configured to: signal of any one of at least two frequency bands of the high frequency transmission signal of the input various mode signals The amplification is performed and output to the duplexer.
  • the duplexer comprises a transmit filter and a receive filter, wherein:
  • the transmit filter is configured to: be coupled to the power amplifier, and output a high frequency transmit signal amplified from the power amplifier;
  • the receiving filter is configured to: filter and output a signal of any one of at least two frequency bands of the high frequency received signal of the received various mode signals.
  • the various mode signals include a Wideband Code Division Multiple Access (WCDMA) signal, a Code Division Multiple Access (CDMA) signal, a Time Division Synchronous Code Division Multiple Access (TD-SCDMA) signal, and a Global System for Mobile Communications (GSM) signal.
  • WCDMA Wideband Code Division Multiple Access
  • CDMA Code Division Multiple Access
  • TD-SCDMA Time Division Synchronous Code Division Multiple Access
  • GSM Global System for Mobile Communications
  • the embodiment of the invention further provides an RF front-end module, comprising an antenna switch module, and the above-mentioned duplex amplification module connected to the antenna switch module.
  • the embodiment of the invention provides a multi-mode radio frequency transceiver chip, comprising a separation module and an output module, wherein:
  • the separation module is configured to: separate the various mode signals into a low frequency transmission signal or a high frequency transmission signal;
  • the output module is configured to: output the low frequency transmission signal or the high frequency transmission signal divided by the separation module.
  • An embodiment of the present invention provides a multimode terminal, including the foregoing multimode radio frequency transceiver that is sequentially connected.
  • the embodiment of the invention provides a multi-mode terminal, comprising the multi-mode radio frequency transceiver chip, the duplex amplifying module and the antenna switch module, and the switch module, which are sequentially connected, wherein:
  • the switch module is configured to: switch a low frequency transmission signal or a high frequency transmission signal sent by the multimode radio transceiver chip to a corresponding duplex amplification module; and/or, the low frequency output by the duplex amplification module The received signal or the high frequency received signal is switched to the dual mode RF transceiver chip.
  • the embodiment of the invention further provides a method for transmitting a signal by a multimode terminal, including:
  • the multimode radio transceiver chip divides the various mode signals to be transmitted into low frequency transmission signals or high frequency transmission signal outputs;
  • the power amplification module amplifies the input low frequency transmission signal or the high frequency transmission signal and outputs the same.
  • the embodiment of the invention further provides a method for transmitting a signal by a multimode terminal, including:
  • the switch module switches the low frequency transmission signal or the high frequency transmission signal of the various mode signals sent by the multimode radio transceiver chip to the corresponding power amplification module;
  • the power amplification module amplifies the input signal and outputs the signal.
  • the above-mentioned duplex amplification module and the multimode terminal including the duplex amplification module synthesize a radio frequency amplifier and a corresponding duplexer of different standards in a similar frequency band into a duplex amplification module, and improve the radio frequency transceiver chip to process a plurality of standard signals.
  • the frequency band synthesis it is a high-low frequency four-channel input and output, which realizes the transmission and reception of radio frequency signals, reduces a large number of devices, and improves the integration degree of multi-mode terminals.
  • FIG. 1 is a schematic structural diagram of a conventional GSM/WCDMA dual mode terminal
  • FIG. 2 is a schematic structural diagram of Embodiment 1 of a GSM/WCDMA dual-mode terminal according to an embodiment of the present invention
  • FIG. 3 is a schematic structural diagram of Embodiment 2 of a GSM/WCDMA dual-mode terminal according to an embodiment of the present invention.
  • An embodiment of the present invention provides a duplex amplification module, which is applied to a transceiver channel of a multimode terminal, where the duplex amplification module includes a power amplifier and a duplexer, where:
  • the power amplifier is configured to amplify a signal of any one of at least two frequency bands of the input mode signals and output the signal to the duplexer;
  • the duplexer is configured to output a signal amplified from the power amplifier; and/or to filter a signal of any one of at least two frequency bands of the received various mode signals and output the signal.
  • the duplex amplification module may be a low frequency duplex amplification module.
  • the power amplifier is configured to amplify a signal of any one of at least two frequency bands of the low frequency transmission signals of the input plurality of mode signals and output the signals to the duplexer.
  • the duplexer includes a transmit filter and a receive filter, wherein: the transmit filter is coupled to the power amplifier and configured to output a low frequency transmit signal amplified from the power amplifier; the receive filter, The signal is set to filter the signal of any one of the at least two frequency bands of the received low frequency received signals of the various mode signals, and then output.
  • the duplex amplification module may be a high frequency duplex amplification module.
  • the power amplifier is configured to amplify a signal of any one of at least two frequency bands of the high frequency transmission signals of the input mode signals and output the signals to the duplexer.
  • the duplexer includes a transmit filter and a receive filter, wherein: the transmit filter is coupled to the power amplifier and configured to output a high frequency transmit signal amplified from the power amplifier; the receive filter And configured to filter and output a signal of any one of at least two frequency bands of the received high frequency received signals of the various mode signals.
  • WCDMA Wideband Code Division Multiple Access
  • CDMA Code Division Multiple Access
  • TD-SCDMA Time Division Synchronous Code Division Multiple Access
  • GSM Global System for Mobile Communications
  • the frequency bands of the two signals are divided.
  • Table 1 WCDMA band and GSM band operating frequency correspondence table WCDMA GSM uplink frequency (terminal downlink frequency (terminal)
  • the transmitting radio frequency amplifier (RFPA) and the duplexer are integrated into a high frequency duplex amplification module and a low frequency duplex amplification module.
  • the low frequency double The amplifier module only needs to cover 824-915 ⁇ , and the high-frequency duplex amplifier module can cover most of the transmission frequency bands as long as it covers 1710-1980 MHz, and the uncovered standard frequency band is less used by operators.
  • the multi-band multi-mode of the duplexer is adjustable, and the internal can be switched by an internal switch with a different bandpass filter.
  • the low frequency transmission signal or the high frequency transmission signal of a certain mode includes at least the signals of the two frequency bands of the mode, and the so-called low frequency transmission signal and the high frequency transmission signal are a relative concept, that is, The frequency band covered by the low-frequency transmission signal is lower than the frequency band covered by the high-frequency transmission signal.
  • the frequency band covered by the low-frequency transmission signal is 824-915MHz; the frequency band covered by the high-frequency transmission signal is 1710 -1980 MHz.
  • the duplex amplifying module may have the function of a low frequency and high frequency duplex amplifying module, and the duplex amplifying module may be integrated with the antenna switch module as an RF front end module, and the duplex amplifying module is connected to the antenna switch module.
  • the antenna switch module is connected to the antenna and high and low frequency duplex amplification
  • the switching device of the module, the switching antenna is connected with the high frequency duplex amplification module and the low frequency duplex amplification module, and when the antenna is connected to one of the modules, it is disconnected from the other module.
  • the embodiment of the present invention provides a multi-mode RF transceiver chip.
  • the multi-mode RF transceiver chip includes: a separation module, configured to divide various mode signals into low-frequency transmission signals. Or a high frequency transmitting signal; an output module, configured to output the low frequency transmitting signal or the high frequency transmitting signal divided by the separating module.
  • the multimode RF transceiver chip further includes: an input module, configured to input a low frequency received signal or a high frequency received signal of various mode signals.
  • the multi-mode RF transceiver chip combines multiple channels for high- and low-frequency reception and transmission of four input and output. This architecture greatly simplifies the RF circuit of the multi-standard mobile phone terminal.
  • FIG. 2 it is a schematic structural diagram of Embodiment 1 of a GSM/WCDMA dual-mode terminal according to an embodiment of the present invention.
  • the dual-mode terminal in this embodiment includes a main antenna 201, an antenna switch module 202, and a switch module 209-212.
  • the amplifier is synthesized into two RF amplifiers, namely a high frequency broadband RF amplifier 207 and a low frequency broadband RF amplifier 208, and is combined with the adjustable duplexers 205 and 206 into a module, namely a high frequency duplex amplification module 203 and a low frequency double.
  • Amplification module 204 is synthesized into two RF amplifiers, namely a high frequency broadband RF amplifier 207 and a low frequency broadband RF amplifier 208, and is combined with the adjustable duplexers 205 and 206 into a module, namely a high frequency duplex amplification module 203 and a low frequency double.
  • the low frequency, high frequency duplex amplification module and the conventional RF transceiver chip 213 switch between different frequency bands and standard transmission and reception paths through different switching modules 209, 210, 211, and 212.
  • the transmission of the WCDMA bandl system transmits the signal through the RF transceiver chip 213, and the switch module 209 controls the switching high frequency duplex amplification module 203 to be connected to the WCDMA HB1 TX channel, and the signal is amplified by the high frequency duplex amplification module 203 to reach the antenna switch.
  • the module 202 is finally transmitted by the main antenna 201; the receiving is received by the main antenna 201 to the antenna switch module 202 and then filtered by the high frequency duplex amplifying module 203, and then switched by the switch module 209 to switch on the high frequency duplex.
  • the transmission and reception behavior of WCDMA signals and GSM signals in other frequency bands are also similar to the above description.
  • WCDMA and GSM signal transmission and reception behaviors are duplex and RF
  • the large module is synthetic, that is, the GSM transmit and receive signals that did not pass through the duplexer in the improved WCDMA mobile phone terminal RF front-end architecture and WCDMA-like signal transmission and reception when working in different modes of duplex amplification module, WCDMA, GSM Switching is performed by the switching behavior of the switch module between the antenna switch module and the duplex amplifier module.
  • the high frequency duplex amplification module and the low frequency duplex amplification module may be completed by a duplex amplification module, except that the power amplifier in the duplex amplification module has a wider operating frequency range, and the transmission filter in the duplexer And the receive filter has a wider range of operating frequencies.
  • the operating frequency of the power amplifier for example, by adding matching circuits.
  • There are also many methods for adjusting the operating frequency of the transmitting filter and the receiving filter in the duplexer for example, transmitting
  • the capacitors in the high- and low-pass filters in the filter and the receive filter are both set to tunable capacitors, and the operating frequencies of the transmit and receive filters are varied by adjusting the capacitance of the tunable capacitor.
  • FIG. 3 it is a schematic diagram of a second embodiment of a GSM/WCDMA dual mode terminal according to an embodiment of the present invention.
  • the dual mode terminal in this embodiment includes a main antenna 301, an antenna switch module 302, and a high frequency duplex amplification module 303.
  • the multi-mode RF transceiver chip also integrates the similar frequency bands of different standards into two high- and low-band transceiver input and output. Specifically, the receiving and transmitting behavior is compared with the dual-mode terminal shown in FIG. 2, and the switching behavior of the switching module to different transmitting and receiving paths is omitted.
  • the RF transceiver chip 309 has only four input and output, and the signal transmission directly passes through the RF transceiver chip 309. The control of the antenna switch module 302 can be completed.
  • the transmission of the WCDMA band1 system transmits the signal through the RF transceiver chip 309, and the signal is switched to the high frequency duplex amplification module 303 and amplified to reach the antenna switch module 302, and finally transmitted by the main antenna 301, and the reception is through the main antenna 301.
  • the signal After receiving the signal to the antenna switch module 302 and then filtering to the high frequency duplex amplification module 303, the signal is transmitted to the RF transceiver chip 309 by the receiving path.
  • the transmission and reception behavior of WCDMA signals and GSM signals in other frequency bands are similar to those described above.
  • the WCDMA and GSM signal transmission and reception behaviors are synthesized when passing through the low-frequency, high-frequency duplex amplification module, that is, the GSM transmission reception signal that did not pass through the duplexer in the improved WCDMA mobile terminal RF front-end architecture.
  • WCDMA-like through the duplex amplification module The signal transmission and reception switching of WCDMA and GSM different standards is carried out through the switching behavior of the antenna switch module and the RF transceiver chip.
  • the high frequency, low frequency duplex amplification modules may be independent of one another or integrated into one chip.
  • the above WCDMA/GSM mode is not limited to mobile phone terminals of WCDMA or GSM, and may also be CDMA/GSM mode, etc.
  • the duplex amplification module may be one for each of the high and low frequency duplex amplification modules, or may be combined into one chip; Combined with the antenna switch mode to become the RF front-end module.
  • the multi-mode terminal transmits and receives signals of different modes through the low-frequency and high-frequency duplex amplification modules, which simplifies the RF transceiver, greatly increases the integration degree of the multi-mode terminal, thereby reducing the occupied PCB area.
  • the above-mentioned duplex amplification module and the multimode terminal including the duplex amplification module synthesize a radio frequency amplifier and a corresponding duplexer of different standards in a similar frequency band into a duplex amplification module, and improve the radio frequency transceiver chip to process a plurality of standard signals.
  • the frequency band synthesis it is a high-low frequency four-channel input and output, which realizes the transmission and reception of radio frequency signals, reduces a large number of devices, and improves the integration degree of multi-mode terminals.

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  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Power Engineering (AREA)
  • Transceivers (AREA)

Abstract

一种双工放大模块、多模终端、射频前端模块、多模射频收发芯片和多模终端发送信号的方法。所述双工放大模块包括功率放大器和双工器，其中：所述功率放大器，用于对输入的各种模式信号的至少两个频段中任一频段的信号进行放大后输出至所述双工器；所述双工器，用于输出来自所述功率放大器放大后的信号；和/或，对接收到的所述各种模式信号的至少两个频段中任一频段的信号进行滤波后输出。上述双工放大模块及包含该双工放大模块的多模终端，简化了射频收发路，大大增加了多模终端的集成度，从而减少了所占用的PCB的面积。

Description

双工放大模块、 射频前端模块和多模终端
技术领域
本发明涉及移动通信技术， 尤其涉及一种双工放大模块、 多模终端、 射 频前端模块、 多模射频收发芯片和多模终端发送信号的方法。 背景技术
现在手机通信系统中， 手机终端的射频前端是实现信号传输收发的关键 器件， 随着通信的多模多制式化， 射频前端担负着多种制式多模信号收发的 作用 。 随着第 三代移动通信技术 （ the 3rd Generation Mobile Telecommunications , 3G ) 、 长期演进技术 ( Long Term Evolution, LTE ) 的 发展， 当前电信运营商使用多个不同制式， 各个制式的模式和频段也各不相 同， 主流的制式主要有全球移动通信系统 （ Global System for Mobile Communication, GSM ) 、 码分多址（ Code Division Multiple Access, CDMA ) 系统、 宽带码分多址（Wideband Code Division Multiple Access, WCDMA ) 系统、 时分同步码分多址 ( Time Division- Synchronous Code Division Multiple Access, TD-SCDMA ) 系统、 CDMA2000以及 LTE。
传统的 GSM/WCDMA双模终端包括主天线、 天线匹配、 天线开关模组、 双工器 (duplexer)、 射频放大器 ( Radio Frequency Power Amplifier, RFPA ) 、 声表面（ Surface Acoustic Wave, SAW )滤波器、 射频收发芯片 （transceiver ) 等。 WCDMA系统和 GSM系统的收发行为是分开进行的， GSM系统的接收 行为是通过 GSM主天线接收信号经由匹配电路到天线开关模组模块再经过 SAW滤波器到射频收发芯片 （transceiver )进行信号处理， GSM系统的发射 行为是通过射频收发芯片 （transceiver )将信号发送给 RFPA放大后经由天线 开关模组、 匹配电路到 GSM主天线发射； 而 WCDMA 系统的接收行为由 WCDMA主天线接收信号经由匹配电路到天线开关模组到双工器转换到接收 路再到射频收发芯片 （transceiver )进行信号处理， WCDMA系统的发射行为 由射频收发芯片 （transceiver )输出信号到双工器再到天线开关模组、 匹配电 路， 由 WCDMA主天线发射。 这里的 GSM主天线和 WCDMA主天线可以合 成为一个， 也可以单独设计， WCDMA 系统和 GSM 系统的射频收发芯片 ( transceiver )可以是合成的， 也可以是各自独立的。
如图 1 所示， 是现有的 GSM/WCDMA双模终端的架构示意图， 其中 WCDMA频段（band ) 1系统的接收行为是通过主天线 101接收信号， 经由 天线开关模组 102 到双工器 107 后到接收路再进入射频收发芯片 113 ; WCDMA bandl系统的发射行为是由射频收发芯片 113发射输出信号到射频 放大器 110, 信号放大后进入双工器 107再进入天线开关模组 102由主天线 101发射； GSM 高频系统的发射行为是由射频收发芯片 113将 GSM高频信 号输入到对应频段的射频放大器 105再经由天线开关模组 102由主天线 101 发射， GSM 高频系统的接收行为由主天线 101接收信号，经由信道传送到天 线开关模组 102再通过声表面滤波器 103滤波最后到达射频收发芯片 113。 其他频段的 WCDMA、 GSM收发系统工作类似于以上描述。
对于手机的设计， 特别是射频前端模块的设计， 复杂度愈来愈大， 这也 要求设计的集成度越来越高， 而现有的射频前端架构设计还较为复杂， 进一 步地集成化和简化是必然的趋势。
发明内容
本发明实施例提供了一种双工放大模块、 射频前端模块、 多模终端、 多 模射频收发芯片和多模终端发送信号的方法， 以解决现有多模终端复杂度较 高， 集成度较低的问题。
本发明实施例提供了一种双工放大模块， 应用于多模终端的收发通道， 所述双工放大模块包括功率放大器和双工器， 其中：
所述功率放大器设置成： 对输入的各种模式信号的至少两个频段中任一 频段的信号进行放大后输出至所述双工器；
所述双工器设置成： 输出来自所述功率放大器放大后的信号； 和 /或， 对 接收到的所述各种模式信号的至少两个频段中任一频段的信号进行滤波后输 出。
所述双工放大模块还包括低频双工放大模块， 其中： 所述功率放大器是设置成： 对输入的所述多种模式信号的低频发射信号 的至少两个频段中任一频段的信号进行放大后输出至所述双工器。
其中， 所述双工器包括发射滤波器和接收滤波器， 其中：
所述发射滤波器设置成： 与所述功率放大器相连， 以及输出来自所述功 率放大器放大后的低频发射信号；
所述接收滤波器设置成： 对接收到的所述各种模式信号的所述低频接收 信号的至少两个频段中任一频段的信号进行滤波后输出。
所述双工放大模块还包括高频双工放大模块， 其中： 所述功率放大器是设置成： 对输入的所述各种模式信号的高频发射信号 的至少两个频段中任一频段的信号进行放大后输出至所述双工器。
其中， 所述双工器包括发射滤波器和接收滤波器， 其中：
所述发射滤波器设置成： 与所述功率放大器相连， 以及输出来自所述功 率放大器放大后的高频发射信号；
所述接收滤波器设置成： 对接收到的所述各种模式信号的所述高频接收 信号的至少两个频段中任一频段的信号进行滤波后输出。
其中， 所述各种模式信号包括宽带码分多址（WCDMA )信号、 码分多 址（ CDMA )信号、 时分同步码分多址（ TD-SCDMA )信号和全球移动通讯 系统（GSM )信号。
本发明实施例还提供了一种射频前端模块， 包括天线开关模组， 以及与 所述天线开关模组相连的上述的双工放大模块。
本发明实施例提供了一种多模射频收发芯片，包括分离模块和输出模块， 其中：
所述分离模块设置成： 将各种模式信号分离成低频发射信号或高频发射 信号；
所述输出模块设置成： 输出所述分离模块分成的所述低频发射信号或所 述高频发射信号。
本发明实施例提供了一种多模终端， 包括依次连接的上述多模射频收发 芯片、 上述双工放大模块和天线开关模组。
本发明实施例提供了一种多模终端， 包括依次连接的上述多模射频收发 芯片、 上述双工放大模块和天线开关模组， 以及开关模块， 其中：
所述开关模块设置成： 将所述多模射频收发芯片发送的低频发射信号或 高频发射信号切换至对应的双工放大模块； 和 /或， 将所述双工放大模块输出 的所述低频接收信号或所述高频接收信号切换至所述双模射频收发芯片。
本发明实施例还提供了一种多模终端发送信号的方法， 包括：
多模射频收发芯片将待发送的各种模式信号分成低频发射信号或高频发 射信号输出；
功率放大模块对输入的所述低频发射信号或所述高频发射信号进行放大 后输出。
本发明实施例还提供了一种多模终端发送信号的方法， 包括：
开关模块将多模射频收发芯片发送的各种模式信号的低频发射信号或高 频发射信号切换至对应的功率放大模块；
所述功率放大模块对输入的信号进行放大后输出。
上述双工放大模块及包括该双工放大模块的多模终端， 将相近频段不同 制式的射频放大器与对应的双工器合成为双工放大模块， 将射频收发芯片改 进为可以处理多种制式信号， 并按照频段合成为高低频四路输入输出， 实现 射频信号的收发， 减少了大量器件， 提高了多模终端的集成度。 附图概述
图 1是现有的 GSM/WCDMA双模终端的架构示意图；
图 2是本发明实施例 GSM/WCDMA双模终端实施例一的架构示意图； 图 3是本发明实施例 GSM/WCDMA双模终端实施例二的架构示意图。
本发明的较佳实施方式
下文中将结合附图对本发明的实施例进行详细说明。 需要说明的是， 在 不冲突的情况下， 本申请中的实施例及实施例中的特征可以相互任意组合。 本发明实施例提供了一种双工放大模块， 应用于多模终端的收发通道， 所述双工放大模块包括功率放大器和双工器， 其中：
所述功率放大器， 设置成对输入的各种模式信号的至少两个频段中任一 频段的信号进行放大后输出至所述双工器；
所述双工器， 设置成输出来自所述功率放大器放大后的信号； 和 /或， 对 接收到的各种模式信号的至少两个频段中任一频段的信号进行滤波后输出。
其中， 上述双工放大模块可以为低频双工放大模块。 具体地， 所述功率 放大器， 是设置成对输入的多种模式信号的低频发射信号的至少两个频段中 任一频段的信号进行放大后输出至所述双工器。 所述双工器包括发射滤波器 和接收滤波器， 其中： 所述发射滤波器， 与所述功率放大器相连， 设置成输 出来自所述功率放大器放大后的低频发射信号； 所述接收滤波器， 设置成对 接收到的各种模式信号的低频接收信号的至少两个频段中任一频段的信号进 行滤波后输出。
另外， 上述双工放大模块可以为高频双工放大模块。 具体地， 所述功率 放大器， 是设置成对输入的各种模式信号的高频发射信号的至少两个频段中 任一频段的信号进行放大后输出至所述双工器。 所述双工器包括发射滤波器 和接收滤波器， 其中： 所述发射滤波器， 与所述功率放大器相连， 设置成输 出来自所述功率放大器放大后的高频发射信号； 所述接收滤波器， 设置成对 接收到的各种模式信号的高频接收信号的至少两个频段中任一频段的信号进 行滤波后输出。
上述各种模式信号包括宽带码分多址 （WCDMA ) 信号、 码分多址 ( CDMA )信号、 时分同步码分多址（ TD-SCDMA )信号和全球移动通讯系 统（GSM )信号。
当上述模式信号为 GSM信号和 WCDMA信号时， 两种信号的频段划分
^口表 1所示：
表 1 WCDMA频段和 GSM频段工作频率对应表 WCDMA GSM 上行频率（终端 下行频率（终端
备注 频段 频段 发射） （MHz ) 接收） （MHz )
BAND I 1920 - 1980 高频
BAND II PCS1900 1850 -1910 1930 - 1990 高频
BAND III DCS1800 1710 -1785 1805 - 1880 高频
BAND IV 高频
BAND V GSM850 824 - 849 869 - 894
卜 低频 o
BAND VI 830 - 840 875 - 885 低频
卜
BAND VII 2500 - 2570 2620 - 2690 高频
BAND VIII GSM900 880 - 915 925 - 960 低频
BAND IX 1749.9 - 1784.9 1844.9 - 1879.9 高频
O
o
、
o
为了提高集成度， 发射射频放大器 （RFPA )和双工器（duplexer ) 集成 为一个高频双工放大模块和一个低频双工放大模块， 从以上的 GSM、 WCDMA发射接收频段可以看出， 低频双工放大模块只要覆盖 824-915ΜΗζ , 而高频双工放大模块只要覆盖 1710-1980 MHz就可以覆盖大部分制式的发射 频段， 而没有被覆盖的制式频段也较少被运营商使用。 双工器的多频段多模 是可调的， 内部可以通过电开关切换内部不同的带通滤波器实现。
需要说明的是， 本发明实施例中某一模式的低频发射信号或高频发射信 号均至少包括该模式的两个频段的信号， 所谓低频发射信号和高频发射信号 是一个相对的概念， 即低频发射信号覆盖的频段频点低于高频发射信号覆盖 的频段频点， 例如， 对于 GSM/WCDMA信号而言， 低频发射信号覆盖的频 段为 824-915MHz; 高频发射信号覆盖的频段为 1710-1980 MHz。
当然， 上述双工放大模块可以具有低频、 高频双工放大模块的功能， 上 述双工放大模块可以和天线开关模组集成为射频前端模块， 该双工放大模块 与该天线开关模组相连。 所述天线开关模组为连接天线与高、 低频双工放大 模块的开关器件，切换天线与高频双工放大模块和低频双工放大模块的连接， 当天线与其中一个模块连接时与另外一个模块断开。
为了实现上述低频、 高频双工放大模块的功能， 本发明实施例提供了一 种多模射频收发芯片， 该多模射频收发芯片包括： 分离模块， 用于将各种模 式信号分成低频发射信号或高频发射信号； 输出模块， 用于输出所述分离模 块分成的所述低频发射信号或所述高频发射信号。 该多模射频收发芯片还包 括： 输入模块， 用于输入各种模式信号的低频接收信号或高频接收信号。 上 述多模射频收发芯片将多路收发合成为高低频接收发射四路输入输出， 这样 的架构大大简化了多制式手机终端的射频电路。
如图 2所示， 是本发明实施例 GSM/WCDMA双模终端实施例一的架构 示意图， 该实施例中的双模终端包括主天线 201、 天线开关模组 202、 开关模 块 209-212、 高频双工放大模块 203、 低频双工放大模块 204和多模射频收发 芯片 213; 与传统的 WCDMA/GSM手机终端相比，省去了多个声表面滤波器 和射频放大器， 多个不同制式的放大器按照频段合成为两个射频放大器即高 频宽频射频放大器 207和低频宽频射频放大器 208,并分别与可调双工器 205 和 206合成为各一个模块即高频双工放大模块 203和低频双工放大模块 204。 低频、 高频双工放大模块和传统的射频收发芯片 213之间通过不同的开关模 块 209、 210、 211、 212 对不同频段和制式的发射接收路进行切换。 比如 WCDMA bandl系统的发射是通过射频收发芯片 213传输出信号， 开关模块 209控制切换高频双工放大模块 203与 WCDMA HB1 TX路接通， 信号经过 高频双工放大模块 203放大后到达天线开关模组 202, 最后由主天线 201发 射； 接收是通过主天线 201接收信号到天线开关模组 202再到高频双工放大 模块 203进行滤波后， 由开关模块 209控制切换接通高频双工放大模块 203 与射频收发芯片 213的 WCDMA HB1 RX接收路， 最后信号到达射频收发芯 片 213。 其他频段的 WCDMA信号和 GSM信号的收发行为也类似于上述描 述。
综上所述， WCDMA和 GSM信号发射和接收行为在经过双工和射频放 大模块时是合成的， 即原先不经过双工器的 GSM发射接收信号在改进的 WCDMA手机终端射频前端架构中和 WCDMA—样经过双工放大模块， WCDMA, GSM不同制式工作时的信号发射接收切换是通过天线开关模组和 双工放大模块之间的开关模块的开关行为进行的。
另外， 上述高频双工放大模块和低频双工放大模块可以由一个双工放大 模块完成， 只是此时双工放大模块中的功率放大器工作频点范围更宽， 双工 器中的发射滤波器和接收滤波器的工作频点范围也更宽。 调节功率放大器工 作频点的方法可以有很多种， 例如通过增加匹配电路的方式来调节； 而调节 双工器中的发射滤波器和接收滤波器的工作频点的方法也有很多种， 例如将 发射滤波器和接收滤波器中的高低通滤波器中的电容均设为可调电容， 通过 调节可调电容的电容值来改变发射滤波器和接收滤波器的工作频率。
如图 3所示， 是本发明实施例 GSM/WCDMA双模终端实施例二的架构 示意图， 该实施例中的双模终端包括主天线 301、 天线开关模组 302、 高频双 工放大模块 303、低频双工放大模块 304和多模射频收发芯片 309; 与图 2所 示双模终端相比， 省去了开关模块， 射频收发芯片集成了 WCDMA、 GSM收 发， 并将 WCDMA、 GSM收发集成为高、 低频各两路收发输入输出。 同时， 多模射频收发芯片也将不同制式相近频段集成为高低频段两路收发输入输 出。 具体地， 接收发射行为与图 2所示双模终端相比， 省去了开关模块对不 同路发射接收路的切换行为， 射频收发芯片 309只有四路输入输出， 信号传 输直接通过射频收发芯片 309和天线开关模组 302的控制就可以完成。 比如 WCDMA bandl系统的发射是通过射频收发芯片 309传输出信号， 信号切换 至高频双工放大模块 303并经放大后到达天线开关模组 302, 最后由主天线 301发射， 接收是通过主天线 301接收信号到天线开关模组 302再到高频双 工放大模块 303进行滤波后， 由接收路将信号传输到射频收发芯片 309。 其 他频段的 WCDMA信号和 GSM信号的收发行为也类似于上述描述。
综上所述， WCDMA和 GSM信号发射和接收行为在经过低频、 高频双 工放大模块时是合成的，即原先不经过双工器的 GSM发射接收信号在改进的 WCDMA手机终端射频前端架构中和 WCDMA—样经过双工放大模块， WCDMA、 GSM不同制式工作时的信号发射接收切换是通过天线开关模组和 射频收发芯片的切换行为进行的。 所述高频、 低频双工放大模块可以是互相 独立的， 也可以集成在一个芯片内。
上述 WCDMA/GSM模式不限于 WCDMA、 GSM两种制式的手机终端， 还可以是 CDMA/GSM模式等， 双工放大模块可以为高低频双工放大模块各 一个， 也可以合成为一个芯片； 也可以和天线开关模组合成为射频前端模块。
上述多模终端， 通过低频、 高频双工放大模块对不同模式的信号进行收 发， 简化了射频收发路， 大大增加了多模终端的集成度， 从而减少了所占用 的 PCB的面积。
本领域普通技术人员可以理解上述方法中的全部或部分步骤可通过程序 来指令相关硬件完成， 上述程序可以存储于计算机可读存储介质中， 如只读 存储器、 磁盘或光盘等。 可选地， 上述实施例的全部或部分步骤也可以使用 一个或多个集成电路来实现。 相应地， 上述实施例中的各模块 /单元可以釆用 硬件的形式实现， 也可以釆用软件功能模块的形式实现。 本发明实施例不限 制于任何特定形式的硬件和软件的结合。
以上实施例仅用以说明本发明的技术方案而非限制， 仅仅参照较佳实施 例对本发明进行了详细说明。 本领域的普通技术人员应当理解， 可以对本发 明的技术方案进行修改或者等同替换， 而不脱离本发明技术方案的精神和范 围， 均应涵盖在本发明的权利要求范围当中。
工业实用性
上述双工放大模块及包括该双工放大模块的多模终端， 将相近频段不同 制式的射频放大器与对应的双工器合成为双工放大模块， 将射频收发芯片改 进为可以处理多种制式信号， 并按照频段合成为高低频四路输入输出， 实现 射频信号的收发， 减少了大量器件， 提高了多模终端的集成度。

Claims

权 利 要 求 书
1、 一种双工放大模块， 应用于多模终端的收发通道， 所述双工放大模块 包括功率放大器和双工器， 其中：
所述功率放大器设置成： 对输入的各种模式信号的至少两个频段中任一 频段的信号进行放大后输出至所述双工器； 所述双工器设置成： 输出来自所述功率放大器放大后的信号； 和 /或， 对 接收到的所述各种模式信号的至少两个频段中任一频段的信号进行滤波后输 出。
2、 根据权利要求 1所述的双工放大模块， 其中： 所述功率放大器是设置成： 对输入的所述多种模式信号的低频发射信号 的至少两个频段中任一频段的信号进行放大后输出至所述双工器。
3、 根据权利要求 2所述的双工放大模块， 其中： 所述双工器包括发射滤波器和接收滤波器， 其中： 所述发射滤波器设置成： 与所述功率放大器相连， 以及输出来自所述功 率放大器放大后的低频发射信号； 所述接收滤波器设置成： 对接收到的所述各种模式信号的所述低频接收 信号的至少两个频段中任一频段的信号进行滤波后输出。
4、 根据权利要求 1所述的双工放大模块， 其中： 所述功率放大器是设置成： 对输入的所述各种模式信号的高频发射信号 的至少两个频段中任一频段的信号进行放大后输出至所述双工器。
5、 根据权利要求 4所述的双工放大模块， 其中： 所述双工器包括发射滤波器和接收滤波器， 其中： 所述发射滤波器设置成： 与所述功率放大器相连， 以及输出来自所述功 率放大器放大后的高频发射信号； 所述接收滤波器设置成： 对接收到的所述各种模式信号的所述高频接收 信号的至少两个频段中任一频段的信号进行滤波后输出。
6、 根据权利要求 1-5任一权利要求所述的双工放大模块， 其中： 所述各种模式信号包括宽带码分多址 （WCDMA ) 信号、 码分多址 ( CDMA )信号、 时分同步码分多址（ TD-SCDMA )信号和全球移动通讯系 统（GSM )信号。
7、 一种射频前端模块， 包括天线开关模组， 以及与所述天线开关模组相 连的如权利要求 1-5任一项所述的双工放大模块。
8、 一种多模射频收发芯片， 包括分离模块和输出模块， 其中： 所述分离模块设置成： 将各种模式信号分离成低频发射信号或高频发射 信号；
所述输出模块设置成： 输出所述分离模块分成的所述低频发射信号或所 述高频发射信号。
9、 一种多模终端， 包括依次连接的如权利要求 8所述的多模射频收发芯 片、 如权利要求 1-5任一项所述的双工放大模块和天线开关模组。
10、 一种多模终端， 包括依次连接的如权利要求 8所述的多模射频收发 芯片、 如权利要求 1-5任一项所述的双工放大模块和天线开关模组， 还包括 开关模块， 其中： 所述开关模块设置成： 将所述多模射频收发芯片发送的低频发射信号或 高频发射信号切换至对应的双工放大模块； 和 /或， 将所述双工放大模块输出 的所述低频接收信号或所述高频接收信号切换至所述双模射频收发芯片。
11、 一种多模终端发送信号的方法， 包括： 多模射频收发芯片将待发送的各种模式信号分成低频发射信号或高频发 射信号输出； 功率放大模块对输入的所述低频发射信号或所述高频发射信号进行放大 后输出。
12、 一种多模终端发送信号的方法， 包括： 开关模块将多模射频收发芯片发送的各种模式信号的低频发射信号或高 频发射信号切换至对应的功率放大模块；
所述功率放大模块对输入的信号进行放大后输出。
PCT/CN2012/076374 2011-11-04 2012-06-01 双工放大模块、射频前端模块和多模终端 WO2013063931A1 (zh)

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