WO2010133117A1 - 移动通信终端的无线收发装置 - Google Patents

移动通信终端的无线收发装置 Download PDF

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Publication number
WO2010133117A1
WO2010133117A1 PCT/CN2010/071987 CN2010071987W WO2010133117A1 WO 2010133117 A1 WO2010133117 A1 WO 2010133117A1 CN 2010071987 W CN2010071987 W CN 2010071987W WO 2010133117 A1 WO2010133117 A1 WO 2010133117A1
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Prior art keywords
mobile communication
communication terminal
matching network
matching
antenna
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PCT/CN2010/071987
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English (en)
French (fr)
Inventor
白剑
Original Assignee
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 US13/203,865 priority Critical patent/US20120003944A1/en
Priority to EP10777321.0A priority patent/EP2434653A4/en
Publication of WO2010133117A1 publication Critical patent/WO2010133117A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/18—Selecting a network or a communication service
    • 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
    • H04B1/06—Receivers
    • H04B1/16—Circuits
    • H04B1/18—Input circuits, e.g. for coupling to an antenna or a transmission line
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/02—Terminal devices
    • H04W88/06—Terminal devices adapted for operation in multiple networks or having at least two operational modes, e.g. multi-mode terminals
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H7/00—Multiple-port networks comprising only passive electrical elements as network components
    • H03H7/38—Impedance-matching networks
    • H03H7/40—Automatic matching of load impedance to source impedance

Definitions

  • the present invention belongs to the field of communication technologies, and in particular, to a wireless transceiver device for a mobile communication terminal.
  • Dual-mode and even multi-mode mobile communication terminals have become more and more popular.
  • Typical 3G and GSM dual-mode mobile communication terminals require antennas to operate in multiple frequency bands, and the GSM system is only required.
  • Mobile communication terminals have been required to start supporting. Up to Quad-band (simultaneous support for GSM850/EGSM/DCS/PCS Four kinds of GSM bands), which puts high demands on multi-frequency and wideband of antennas.
  • the shape of mobile communication terminals has evolved more and more, such as clamshell machines and slider machines.
  • the external environment used by the mobile communication terminal often changes, such as near a face call or using a headset to talk; when the appearance or application environment of the mobile communication terminal changes, the performance parameters of the built-in antenna also change.
  • An object of the present invention is to provide a radio transceiver for a mobile communication terminal, which aims to solve the problem of optimizing the radio transmission and reception performance of the mobile communication terminal.
  • the present invention is implemented in the form of a wireless communication device for a mobile communication terminal, the wireless transceiver device comprising a baseband chip, a radio frequency transceiver, a power amplification module and an antenna, the wireless transceiver device further comprising a network selection switch and two One or more matching networks, where:
  • the wireless transceiver performance indicators of the two or more matching networks respectively correspond to different working modes of the mobile communication terminal
  • the network selection switch is configured to select one of the two or more matching networks to control the selected matching network to be connected to the antenna.
  • the matching network includes an inductor and a capacitor, and the performance index parameters of the inductor and the capacitor in different matching networks are different.
  • the network selection switch is connected to the baseband chip, and the baseband chip is configured to control the network selection switch to select one of the two or more matching networks according to an operation mode of the mobile communication terminal.
  • the matching network corresponding to the working mode.
  • the mobile communication terminal is a flip mobile communication terminal, and the baseband chip is configured to control the network selection switch to select one of the two or more matching networks according to a channel range in which the mobile communication terminal operates.
  • the matching network corresponding to the channel range in which the mobile communication terminal operates.
  • the mobile communication terminal is a multi-mode mobile communication terminal, and the baseband chip is configured to control the network selection switch to select one of the two or more matching networks according to a working mode of the mobile communication terminal.
  • the matching network corresponding to the mobile communication terminal working system.
  • the mobile communication terminal is a mobile communication terminal configured with a PIFA antenna, and the baseband chip is configured to control the network selection switch to match from the two or more according to a frequency segment in which the mobile communication terminal operates A matching network corresponding to the frequency segment in which the mobile communication terminal operates is selected in the network.
  • the invention overcomes the deficiencies of the prior art, and configures two or more sets of matching networks for the mobile communication terminal, and the mobile communication terminal can select one matching network and antenna matching according to the working condition thereof, so that the wireless transceiver performance is optimized. .
  • the technical solution provided by the invention optimizes the wireless performance of the mobile communication terminal in various application environments, improves customer satisfaction, and is also helpful for optimizing the mobile network and improving the network capacity.
  • FIG. 1 is a block diagram of a system for wirelessly transmitting and receiving a mobile communication terminal according to an embodiment of the present invention
  • FIG. 2 is a flow chart of an embodiment of the present invention.
  • FIG. 1 A system block diagram of a wireless communication device for a mobile communication terminal according to an embodiment of the present invention is shown in FIG. 1 and includes a baseband chip (Base). Band), Transceiver, Power Amplifier (PA), Antenna, Two or More Matching Networks (Matching Network) (for example, matching network A and matching network B in Figure 1) and matching network selection switch (Matching Network) Selector).
  • the baseband chip is connected to the radio frequency transceiver through the data line and the control line, and the radio frequency transceiver is connected to the power amplifying module through the radio frequency transmission line, and the power amplifying module is connected with the matching network A and the matching network B, and the matching network A and the matching network B are matched.
  • the network selection switch is connected, the matching network selection switch is connected to the antenna, and the baseband chip is also connected to the matching network selection switch.
  • the baseband chip is used to control the matching network selection switch according to the working mode of the mobile communication terminal, such as the current working system, the frequency point, the appearance form and the application environment, and the matching network selection switch is used to select the matching network A according to the control of the baseband chip. Connect to the antenna, or select matching network B to connect to the antenna.
  • the matching network selection switch can be controlled by a high frequency switch, which is controlled by a GPIO (general purpose input/output interface) of the baseband chip.
  • the baseband chip When the mobile communication terminal transmits a signal, the baseband chip encodes and modulates the voice and data information collected or generated by the mobile communication terminal, so that the baseband modulated signal S ⁇ B can be obtained.
  • the baseband chip transmits S ⁇ B to the radio frequency transceiver through the data line, and the baseband modulation signal is upconverted to the radio frequency signal SRF by the radio frequency transceiver.
  • the RF transceiver sends the RF signal SRF to the power amplification module through the RF transmission line.
  • the baseband chip controls the matching network selection switch according to the current working mode, frequency point, appearance mode and application environment of the mobile communication terminal, and the matching network selection switch is used to select the matching network A and the antenna to be connected according to the control of the baseband chip, or Select Match Network B to connect to the antenna.
  • the power amplifying module amplifies the SRF, sends it to the antenna through the matching network A or the matching network B, and finally radiates the antenna.
  • the baseband chip controls the matching network selection switch according to the current working mode, frequency point, appearance form and application environment of the mobile communication terminal, and the matching network selection switch is used to select and match according to the control of the baseband chip.
  • Network A is connected to the antenna or the matching network B is connected to the antenna.
  • the antenna receives the external radio frequency signal SRF through the matching network A or the matching network B, and is amplified by the power amplifying module and transmitted to the radio frequency transceiver.
  • the RF signal SRF is downconverted to a baseband modulated signal S ⁇ B by the RF transceiver and sent to the baseband chip.
  • the baseband chip will perform demodulation and decoding operations to obtain voice or digital information.
  • the matching network A and the matching network B are composed of discrete components (commonly high-frequency inductors and high-frequency capacitors). Different matching networks have different performance parameters of discrete components, and different matching networks correspond to different working frequency ranges. In other words, the operating frequency of the mobile communication terminal is divided into several different frequency segments, and each frequency segment is designed to correspond to a matching network.
  • the antenna and the power amplifying module, the antenna and the baseband chip are transmitted, the loss is minimized, thereby optimizing the wireless performance of the mobile communication terminal.
  • the matching network A or the matching network B may also be designed as a circuit composed of discrete components, but the performance indexes of the discrete components of each component are adjustable, and the performance indexes of the discrete components are adjusted.
  • the matching network A corresponding to the present invention corresponds to the matching network B according to the present invention when the performance index of each discrete component is adjusted to the B working mode.
  • the technical solution provided by the present invention is specifically implemented, in the process of developing a mobile communication terminal, according to a specific situation, the number of matching networks is selected, the working frequency range of each set of matching networks is allocated, and the design is different according to the selected working frequency range. Matching network.
  • the specific application of the technical solution of the present invention can cover but is not limited to the following cases:
  • the channel number of the low frequency GSM 850 is from 128 channels to 251 channels, and a total of 124 channels occupy 25 MHz bandwidth.
  • the length of the main land is short, it is difficult for a single matching network to cover the bandwidth of 25 MHz.
  • Two sets of matching networks can be designed to adjust the matching network A and antenna coordination so that the antenna performs best on channel 128 to channel 190, and another set of matching network B is adjusted to allow the antenna to be on channel 191 to channel.
  • 251 has the best performance indicators.
  • the baseband chip controls the matching network B to connect with the antenna by matching the network selection switch; if the mobile communication terminal operates in the low channel interval (channel 128 to channel 190), then the baseband chip controls the matching network A to connect to the antenna by matching the network selection switch. In the end, the best radiation performance can be obtained regardless of the mobile communication terminal operating on that channel.
  • each matching network is reduced from 25MHz to 12.5MHz, which greatly reduces the design difficulty, so that the terminal with a shorter length can also obtain good radiation performance.
  • This can cover the entire low-frequency bandwidth requirement, and the demand for PCB length is also reduced accordingly, so the flip mobile communication terminal can be designed to be relatively small and short.
  • different matching networks can be designed according to different working systems.
  • different matching networks are used to match antennas, and antenna performance parameters such as return loss are used.
  • Both VSWR and VSWR can reach the optimal value.
  • WCDMA Band A dual mode terminal with I (working frequency band at 2.1 GHz) and GSM (working frequency band at 850 MHz/900 MHz/1800/1900 MHz), it is difficult to use only one set of matching networks to complete coverage of five frequency bands.
  • Two sets of matching networks can be selected at the time of design, and the matching network A and antenna coordination can be adjusted, so that the antenna obtains the best radiation performance at 1800/1900/2100 MHz, and the matching network B and the antenna are adjusted. This allows the antenna to achieve the best radiation performance at 850/900MHz.
  • the matching network A and the antenna can be controlled by the network selection switch; if the mobile communication terminal operates in the low frequency band (850MHz/900MHz) ), then the network selection switch can be used to control the matching network B to be connected to the antenna; whether the mobile communication terminal operates in that frequency band, the best radiation performance can be obtained, thereby obtaining the best wireless performance under different standards.
  • the working parameters of the antenna can be adjusted by adjusting the matching network.
  • different matching networks are selected.
  • the performance parameters of the antenna such as return loss and VSWR can reach the optimal value.
  • a high frequency DCS 1800 MHz digital cellular system 1800 MHz
  • the bandwidth is relatively narrow, and a matching network is difficult to cover all 75MHz bandwidth.
  • two sets of matching networks can be designed to adjust the matching network A and the antenna coordination, so that the antenna performs best on the channel 512 to the channel 698, and the adjustment matching network B can make the antenna on the channel 699 to the channel 885.
  • the matching network A is controlled to turn on the antenna by matching the network selection switch; if the mobile communication terminal operates in the high channel interval (channel 699 to Channel 885), then control the matching network B to turn on the antenna by matching the network selection switch; the best radiation performance can be obtained regardless of which channel the terminal operates on.
  • the working range of each matching network is reduced from 75MHz to 37.5MHz, which greatly reduces the design difficulty. With the above design, even if the height of the terminal PIFA antenna is insufficient, good radiation performance can be obtained in each channel.
  • the frequency of the current cell requires matching network A
  • the working frequency band of the neighboring cell is the operating frequency range of matching network B.
  • the neighboring cell information detection cannot be completed only by the matching network A, but should be switched in the cell detection time slot or the detection channel, and the switching of the matching network in order to complete the optimal neighbor cell search and handover.
  • the mobile communication terminal may be of the GSM system, or may be a 3G or other system or even a multi-mode mobile communication terminal.
  • the matching network can be two or more sets.
  • the flowchart of the embodiment of the present invention is as shown in FIG. 2, and specifically includes the following steps:
  • the mobile communication terminal controls the matching network selection switch according to the current working system, frequency, appearance and application environment;
  • the matching network selection switch selects the matching network A and the antenna to be connected according to the control of the baseband chip, or selects the matching network B and the antenna to be connected;
  • the mobile communication terminal receives/transmits a signal by matching network A or matching network B.

Description

移动通信终端的无线收发装置 技术领域
本发明属于通信技术领域，尤其涉及 一种 移动通信终端的无线收发装置。
背景技术
现有的移动通信终端多使用内置天线，而内置天线的应用环境已经越来越严苛，主要体现在以下几个方面：
1、双模甚至多模移动通信终端已经越来越流行，典型的有3G和GSM双模移动通信终端，这要求天线工作在多个频带，单是GSM制式，移动通信终端已经被要求开始支持最多Quad-band（同时支持GSM850/EGSM/DCS/PCS 4种GSM频带），这对天线的多频化、宽带化提出很高要求。
2、移动通信终端越来越追求小型化，这要求外观要薄而小，这种设计必然造成天线的净空区变小，进而影响天线带宽，极大的增加开发难度。
3、移动通信终端的外形已经有了越来越多的演化，如翻盖机、滑盖机等。并且移动通信终端使用的外部环境也经常发生改变，如靠近人脸通话或使用耳机通话等；当移动通信终端的外观形态或应用环境发生变化时，内置天线的性能参数也会发生改变。
尽管使用环境多变而严苛，移动通信终端仍然被要求在各种环境下都有很好的性能。在上述条件下，如果仅仅使用单一的天线匹配网络来完成如此复杂的性能需求是很困难的，容易造成产品研发周期过长，并且移动通信终端性能质量下降。
而如何利用多个天线匹配网络来提高移动通信终端的无线性能，是现有技术尚未解决的问题。
 技术问题
本发明的目的在于提供一种移动通信终端的无线收发装置，旨在解决优化移动通信终端无线收发性能的问题。
 技术解决方案
本发明是这样实现的，一种移动通信终端的无线收发装置，所述的无线收发装置包括基带芯片、射频收发器、功率放大模块和天线，所述的无线收发装置还包括网络选择开关和两个或者两个以上的匹配网络，其中：
所述两个或者两个以上的匹配网络的无线收发性能指标分别与移动通信终端不同的工作模式对应；
所述的网络选择开关用来从所述两个或者两个以上的匹配网络中选择一个，控制所选中的匹配网络与所述的天线接通。
所述的匹配网络包括电感和电容，不同匹配网络中的电感和电容的性能指标参数不同。
所述的网络选择开关与所述基带芯片相连，所述基带芯片用来根据移动通信终端的工作模式控制所述网络选择开关从所述两个或者两个以上的匹配网络中选择一个与所述工作模式对应的匹配网络。
所述移动通信终端为翻盖移动通信终端，所述基带芯片用来根据所述移动通信终端工作的信道范围，控制所述网络选择开关从所述两个或者两个以上的匹配网络中选择一个与所述移动通信终端工作的信道范围对应的匹配网络。
所述移动通信终端为多模移动通信终端，所述基带芯片用来根据所述移动通信终端的工作制式，控制所述网络选择开关从所述两个或者两个以上的匹配网络中选择一个与所述移动通信终端工作制式对应的匹配网络。
所述移动通信终端为配置有PIFA天线的移动通信终端，所述基带芯片用来根据所述移动通信终端所工作的频率段，控制所述网络选择开关从所述两个或者两个以上的匹配网络中选择一个与所述移动通信终端所工作的频率段对应的匹配网络。
 有益效果
本发明克服现有技术的不足，为移动通信终端配置两套或者两套以上的匹配网络，移动通信终端可以根据其工作情况选择从中选择一个匹配网络与天线匹配，使得其无线收发性能达到最优化。本发明提供的技术方案使得移动通信终端在各种应用环境下的无线性能都最优化，提高客户满意度，对移动网络的优化和提高网络容量也有帮助。
附图说明
图1是本发明实施例提供的移动通信终端无线收发装置系统框图；
图2是本发明实施例流程图。
 本发明的最佳实施方式
为了使本发明的目的、技术方案及优点更加清楚明白，以下结合附图及实施例，对本发明进行进一步详细说明。应当理解，此处所描述的具体实施例仅仅用以解释本发明，并不用于限定本发明。
本发明实施例提供的移动通信终端无线收发装置的系统框图如图1所示，包括基带芯片（Base Band)、射频收发器（Transceiver）、功率放大模块（PA）、天线（Antenna）、两个或者两个以上的匹配网络（Matching Network）（图1中以匹配网络A和匹配网络B为例）和匹配网络选择开关（Matching Network Selector）。其中，基带芯片通过数据线和控制线与射频收发器相连，射频收发器通过射频传输线与功率放大模块相连，功率放大模块与匹配网络A和匹配网络B相连，匹配网络A和匹配网络B与匹配网络选择开关相连，匹配网络选择开关与天线相连，基带芯片还与匹配网络选择开关相连。
基带芯片用来根据移动通信终端的工作模式，如当前的工作制式、频点以及外观形态和应用环境等，控制匹配网络选择开关，匹配网络选择开关用来根据基带芯片的控制，选择匹配网络A与天线接通，或者选择匹配网络B与天线接通。匹配网络选择开关可以采用高频开关，由基带芯片的GPIO（通用目的输入输出接口）控制。
移动通信终端发射信号时，基带芯片将移动通信终端采集或生成的语音和数据信息进行编码和调制，这样可获得基带调制信号S¬B。基带芯片通过数据线将S¬B传送给射频收发器，由射频收发器将基带调制信号上变频为射频信号SRF。射频收发器将射频信号SRF通过射频传输线送给功率放大模块。基带芯片根据移动通信终端当前工作的制式、频点以及外观形态和应用环境等情况，控制匹配网络选择开关，匹配网络选择开关用来根据基带芯片的控制，选择匹配网络A与天线接通，或者选择匹配网络B与天线接通。当匹配网络A或者匹配网络B与天线接通后，功率放大模块将SRF放大后，通过匹配网络A或者匹配网络B送给天线，最终由天线辐射出去。
移动通信终端在接收信号时，基带芯片根据移动通信终端当前工作的制式、频点以及外观形态和应用环境等情况，控制匹配网络选择开关，匹配网络选择开关用来根据基带芯片的控制，选择匹配网络A与天线接通，或者选择匹配网络B与天线接通。当匹配网络A或者匹配网络B与天线接通后，天线经过匹配网络A或者匹配网络B将外部的射频信号SRF接收下来，经过功率放大模块放大后传输到达射频收发器。由射频收发器将射频信号SRF下变频为基带调制信号S¬B并送给基带芯片。基带芯片将完成解调和解码工作，从而获得语音或数字信息。
其中，匹配网络A和匹配网络B由分立元件（常见为高频电感和高频电容）组成，不同的匹配网络，其分立元件的性能参数不同，不同的匹配网络对应不同的工作频率范围，换句话说，也就是将移动通信终端的工作频率分成几个不同的频率段，各个频率段设计对应的匹配网络。众所周知，匹配网络的工作频率范围越小，越容易调节，其性能指标也越好，这样，移动通信终端就可以针对不同的情况，选择工作频率范围对应的匹配网络，使得工作频带内的射频信号在天线和功率放大模块、天线和基带芯片之间传输的时候，损耗达到最小，从而使得移动通信终端的无线性能最优化。
具体应用本发明提供的技术方案时，也可以将匹配网络A或者匹配网络B设计成一套分立元件组成的电路，但各个组成的分立元件的性能指标可调，当将各个分立元件的性能指标调整到A工作模式时，对应本发明所述的匹配网络A，当将各个分立元件的性能指标调整到B工作模式时，对应本发明所述的匹配网络B。
具体实现本发明提供的技术方案时，在移动通信终端开发的过程中，根据具体的情况，选定匹配网络的数量，分配每套匹配网络的工作频率范围，根据选定的工作频率范围设计不同的匹配网络。本发明技术方案的具体应用可以覆盖但不局限于以下案例：
1、针对主板比较短的翻盖移动通信终端，因为低频下，小主板尺寸使得主地长度减少，进而影响天线低频带宽，其合盖情况下的低频带宽将比较难满足。在这种情况下，可以采用两个匹配网络来完成无线收发任务，通过不同的匹配网络，调整天线分别工作在低频的不同信道区间。例如，低频GSM850的信道编号从128信道到251信道，总共124个信道占据25MHz带宽。对于上述主地长度较短的案例，单一的匹配网络难以覆盖25MHz的带宽。可以设计两套匹配网络（匹配网络A和匹配网络B），调节匹配网络A和天线配合，使得天线在信道128到信道190性能最好，调节另一套匹配网络B让天线在信道191到信道251有最好的性能指标。在实际使用中，如果移动通信终端工作在高信道区间（信道191到信道251），那么基带芯片通过匹配网络选择开关，控制匹配网络B与天线连接；如果移动通信终端工作在低信道区间（信道128到信道190），那么基带芯片通过匹配网络选择开关，控制匹配网络A与天线连接。最终，无论移动通信终端工作在那个信道，都可以获得最好的辐射性能。通过上述设计，每个匹配网络的工作范围从25MHz降低为12.5MHz，大大的降低了设计难度，从而使得长度较短的终端也能在获得很好的辐射性能。这样可以覆盖整个低频带宽需求，同时对PCB板长的需求也相应降低，因此翻盖移动通信终端可以设计得比较小而短。
2、针对多模移动通信终端，可以根据不同的工作制式来设计不同的匹配网络，当移动通信终端工作在不同制式时，选用不同的匹配网络与天线匹配后，天线的性能参数如回波损耗和VSWR都能达到最优值。例如，针对WCDMA Band I（工作频带在2.1GHz）和GSM（工作频带在850MHz/900MHz/1800/1900MHz）的双模终端，仅仅使用一套匹配网络来完成5个频带的覆盖是困难的。可以在设计的时候选用两套匹配网络（匹配网络A和匹配网络B），调节匹配网络A和天线配合，使得天线在1800/1900/2100MHz获得最好的辐射性能，调节匹配网络B和天线配合，使得天线在850/900MHz获得最好的辐射性能。在实际使用中，如果移动通信终端工作在高频带（2100MHz或1800MHz或1900MHz），那么可以通过网络选择开关，控制匹配网络A与天线接通；如果移动通信终端工作在低频带（850MHz/900MHz），那么可以通过网络选择开关，控制匹配网络B与天线接通；无论移动通信终端工作在那个频带，都可以获得最好的辐射性能，从而获得不同制式下都最好的无线性能。
3、针对配置有高度不够的PIFA（平面倒F形状天线）的移动通信终端，可以通过调整匹配网络来调整天线的工作参数，当移动通信终端工作在不同频率段时，选用不同的匹配网络与天线匹配后，天线的性能参数如回波损耗和VSWR都能达到最优值。例如，高频DCS1800MHz（数字蜂窝系统1800MHz）的信道从512信道到885信道，总共374个信道占据75MHz带宽。对于高度不够的PIFA天线（常见于非常薄的终端），带宽比较窄，一套匹配网络难以覆盖所有75MHz带宽。因此可以设计两套匹配网络（匹配网络A和匹配网络B），调节匹配网络A和天线配合，使得天线在信道512到信道698性能最好，调节匹配网络B可以让天线在信道699到信道885有最好的性能指标。在实际使用中，如果移动通信终端工作在低信道区间（信道512到信道698），那么通过匹配网络选择开关，控制匹配网络A接通天线；如果移动通信终端工作在高信道区间（信道699到信道885），那么通过匹配网络选择开关，控制匹配网络B接通天线；无论终端工作在那个信道，都可以获得最好的辐射性能。通过上述设计，每个匹配网络的工作范围从75MHz降低为37.5MHz,大大的降低了设计难度，通过上述设计，即使终端PIFA天线的高度不够，也能在每个信道获得良好的辐射性能。
在某些情况下，如当前小区的频点要求采用匹配网络A，而邻近小区工作频带是匹配网络B的工作频率范围。此时临近小区信息检测不能仅仅通过匹配网络A来完成，而应该在小区检测时隙或者检测信道内，轮流的切换匹配网络以便完成最佳的邻近小区搜索以及越区切换。
在本发明中，移动通信终端可以是GSM制式，也可以是3G或其他制式的甚至多模移动通信终端。匹配网络可以是两套或者两套以上。
本发明实施例流程图如图2所示，具体包括如下的步骤：
1、移动通信终端根据当前工作的制式、频点以及外观形态和应用环境等情况，控制匹配网络选择开关；
2、匹配网络选择开关根据基带芯片的控制，选择匹配网络A与天线接通，或者选择匹配网络B与天线接通；
3、移动通信终端通过匹配网络A或者匹配网络B接收/发送信号。
以上所述仅为本发明的较佳实施例而已，并不用以限制本发明，凡在本发明的精神和原则之内所作的任何修改、等同替换和改进等，均应包含在本发明的保护范围之内。
 本发明的实施方式
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Claims (6)

  1. 一种移动通信终端的无线收发装置，所述的无线收发装置包括基带芯片、射频收发器、功率放大模块和天线，其特征在于，所述的无线收发装置还包括网络选择开关和两个或者两个以上的匹配网络，其中：
    所述两个或者两个以上的匹配网络的无线收发性能指标分别与移动通信终端不同的工作模式对应；
    所述的网络选择开关用来从所述两个或者两个以上的匹配网络中选择一个，控制所选中的匹配网络与所述的天线接通。
  2. 根据权利要求1所述的无线收发装置，其特征在于，所述的匹配网络包括电感和电容，不同匹配网络中的电感和电容的性能指标参数不同。
  3. 根据权利要求1所述的无线收发装置，其特征在于，所述的网络选择开关与所述基带芯片相连，所述基带芯片用来根据移动通信终端的工作模式控制所述网络选择开关从所述两个或者两个以上的匹配网络中选择一个与所述工作模式对应的匹配网络。
  4. 根据权利要求3所述的无线收发装置，其特征在于，所述移动通信终端为翻盖移动通信终端，所述基带芯片用来根据所述移动通信终端工作的信道范围，控制所述网络选择开关从所述两个或者两个以上的匹配网络中选择一个与所述移动通信终端工作的信道范围对应的匹配网络。
  5. 根据权利要求3所述的无线收发装置，其特征在于，所述移动通信终端为多模移动通信终端，所述基带芯片用来根据所述移动通信终端的工作制式，控制所述网络选择开关从所述两个或者两个以上的匹配网络中选择一个与所述移动通信终端工作制式对应的匹配网络。
  6. 根据权利要求3所述的无线收发装置，其特征在于，所述移动通信终端为配置有PIFA天线的移动通信终端，所述基带芯片用来根据所述移动通信终端所工作的频率段，控制所述网络选择开关从所述两个或者两个以上的匹配网络中选择一个与所述移动通信终端所工作的频率段对应的匹配网络。
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