WO2012079308A1 - 四频段gsm收发装置及无线终端 - Google Patents

四频段gsm收发装置及无线终端 Download PDF

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Publication number
WO2012079308A1
WO2012079308A1 PCT/CN2011/071420 CN2011071420W WO2012079308A1 WO 2012079308 A1 WO2012079308 A1 WO 2012079308A1 CN 2011071420 W CN2011071420 W CN 2011071420W WO 2012079308 A1 WO2012079308 A1 WO 2012079308A1
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WIPO (PCT)
Prior art keywords
frequency
filters
band
transceiver
filter
Prior art date
Application number
PCT/CN2011/071420
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English (en)
French (fr)
Inventor
于娟
葛虎
Original Assignee
中兴通讯股份有限公司
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Publication date
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Publication of WO2012079308A1 publication Critical patent/WO2012079308A1/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
    • H04B1/0053—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

Definitions

  • the present invention relates to communication or, in particular, to a quad-band global mobile communication.
  • GSM Global system for Mobile Communication
  • GSM Global system for Mobile Communication
  • the relatively low-end mobile phones are basically GSM dual-band mobile phones, which is due to the current design of GSM quad-band mobile phones. Higher cost.
  • a quad-band GSM mobile phone requires a single-pole six-four Zheng antenna switch, a quad-band transmit function and port RF power amplifier (PA), and a surface acoustic wave (SAW) filter in each of the four frequency bands.
  • PA quad-band transmit function and port RF power amplifier
  • SAW surface acoustic wave
  • FIG. 1 is a structural diagram of hardware design of a four-band transmitter and receiver in the related art.
  • FIG. 2 is a diagram showing the relationship between the general four-band transmission and receiver logic control configuration shown in FIG. 1.
  • the transmitter has two transmit lines and four receive lines, so that the antenna switch is a single-pole six-throw, and there are six states required, that is, the antenna switch has six logic states.
  • the receiver also needs four sets of differential pairs to complete the reception of four frequency bands. Therefore, it can be concluded that according to the scheme of Figure 1, the antenna switch will have many states, and the transmitter and receiver will have many pins, which will not only increase the cost of the transmitter and receiver hardware, but also because Many pins and traces that are transmitted and received cause difficulty in layout routing.
  • the utility model provides a quad-band GSM transceiver and a wireless terminal, and the utility model provides a quad-band GSM transmitter and receiver with a large number of pins, which causes difficulty in layout routing and an increase in hardware cost. Solve at least one of the above problems. According to an aspect of the present invention, a four-band GSM transceiver is provided.
  • the quad-band GSM transceiver includes: an antenna, further comprising: a dual-band antenna switch respectively connected to the antenna and two filter selection units; the two filter selection units, the input ends thereof Connected to two receiving frequency band channels corresponding to the dual-frequency antenna switch, wherein each of the filter selecting units is configured to select one of at least two filters connected thereto to perform a filtering operation; four different frequency bands a filter, wherein the inputs of the two filters are connected to the same one of the two filter selection units, and the inputs of the remaining two filters are different from the other of the two filter selection units a phase connection; a radio frequency transceiver chip having two receiving channels, wherein one receiving channel is respectively connected to an output end of the two of the filters, and the other receiving channel is respectively connected to an output end of the remaining two filters Connected.
  • the above two filter selection units are single pole double throw switches.
  • the filters of the above four different frequency bands are all surface acoustic wave (SAW) filters.
  • the above two filters are all high-band filters, wherein the frequency band corresponding to the high-band filter is higher than a predetermined threshold; the other two filters are low-band filters, wherein the low-band filter The corresponding frequency band is below the predetermined threshold.
  • the radio frequency transceiver chip includes: a low frequency LNA and a high frequency LNA; the high frequency band filter is connected to the high frequency LNA through a receiving channel of the radio frequency transceiver chip; and the low frequency band filter passes the radio frequency transceiver chip Another receiving channel is coupled to the low frequency LNA.
  • the frequency bands corresponding to the high-band filter are GSM 1800 band and GSM 1900 band; the band corresponding to the ⁇ band filter is GSM 850 band and GSM 900 band.
  • the transceiver device further includes: a radio frequency power amplifier located on a transmitting channel between the dual-frequency antenna switch and the radio frequency transceiver chip; the dual-frequency antenna switch and the radio frequency power amplifier are integrated in one radio frequency transmitting module.
  • the above antenna is a passive device having a four-frequency transceiving function.
  • a wireless terminal is provided.
  • a wireless terminal according to the present invention includes any of the aforementioned four-band GSM transceivers.
  • FIG. 1 is a hardware design architecture diagram of a four-band transmission and receiver in the related art
  • FIG. 2 is a diagram showing a relationship between a four-band transmission and receiver logic control configuration shown in FIG.
  • FIG. 4 is a logical control configuration diagram of a four-band GSM transceiver according to a preferred embodiment of the present invention.
  • FIG. BEST MODE FOR CARRYING OUT THE INVENTION the present invention will be described in detail with reference to the accompanying drawings and embodiments. It should be noted that the embodiments in the present application and the features in the embodiments may be combined with each other without conflict.
  • a four-band GSM transceiver is provided.
  • 3 is a hardware design architecture diagram of a four-band GSM transceiver device according to an embodiment of the present invention. As shown in FIG.
  • the four-band GSM transceiver includes: an antenna 1 , a dual-frequency antenna switch 2, two filter selection units 3 and 4, and four different frequency bands of filters 5, 6, and 8.
  • An RF transceiver chip 9 having two receiving channels.
  • the dual-frequency antenna switch 2 is respectively connected with the antenna 1 and the two filter selecting units 3 and 4; the two filter selecting units 3 and 4 are respectively connected to the two receiving ends corresponding to the dual-frequency antenna switch.
  • each filter selecting unit is configured to select one of the at least two filters connected thereto to perform a filtering operation (for example, the filter selecting unit 3 may select one of the filters 5, 6 connected thereto Perform filtering operation); Filters 5, 6, 7 and 8 of four different frequency bands, wherein the inputs of the two filters 5 and 6 are connected to the same filter selection unit 3 of the two filter selection units, and the remaining two filters The inputs of the devices 7 and 8 are each connected to another filter selection unit 4 of the two filter selection units; the RF transceiver chip 9 having two receiving channels, wherein one receiving channel and the above two filters respectively The outputs of 5 and 6 are connected, and the other receiving channels are respectively connected to the outputs of the above two filters 7 and 8.
  • a dual-frequency antenna switch and two filter selection units are used to select a suitable filter to implement a GSM quad-band scheme, which solves the problem that the four-band GSM transmitter and receiver have more pins in the related art, resulting in a layout. Difficulties in routing and increased hardware costs can further reduce the difficulty of layout routing and maximize the hardware cost of the quad-band GSM solution.
  • the antenna may be a passive device with a quad-frequency transceiver function.
  • both filter selection units may be single pole double throw switches.
  • other components can also be used to implement the filter selection function. For example: RF duplexer, etc.
  • the filters of the four different frequency bands may all be surface acoustic wave (SAW) filters. ⁇ The surface acoustic wave filter is used for filtering, and the filtering effect is better.
  • SAW surface acoustic wave
  • other filters may also be used to filter the received signal.
  • the two filters described above may be set as a high-band filter, wherein the frequency band corresponding to the high-band filter is higher than a predetermined threshold; the other two filters may be set as a low-band filter, wherein the low-band filter The corresponding frequency band is below a predetermined threshold.
  • the frequency bands corresponding to the above high frequency band filter are usually the GSM 1800 frequency band and the GSM 1900 frequency band.
  • the frequency bands corresponding to the above low-band filters are usually the GSM 850 band and the GSM 900 band.
  • the radio frequency transceiver chip includes, but is not limited to: a low frequency LNA and a high frequency LNA; wherein the high frequency band filter can be connected to the high frequency LNA through a receiving channel of the radio frequency transceiver chip; the low frequency band filter passes the radio frequency transceiver chip. The other receiving channel is connected to the low frequency LNA.
  • a single-pole double-throw switch can be added to the frequency-frequency receiving channel to select GSM850 and GSM900 to enter different SAW filters, and their differential output channels are combined and then enter the RF transceiver chip low-frequency LNA.
  • One-step processing; a single-pole double-throw switch is also added to the high-frequency receiving channel, and GSM1800 and GSM1900 are selected to enter different SAW filters. Their differential output channels are combined and then enter the RF transceiver chip high-frequency LNA for further processing. .
  • the foregoing four-band GSM transceiver may further include: an RF power amplifier located on a transmission channel between the dual-frequency antenna switch and the RF transceiver chip, and in the specific implementation process, the dual-frequency antenna switch 2 and the The RF power amplifier can be integrated into a single RF transmitter module or it can be placed independently.
  • the RF transceiver chip 9 can transmit the signal through the PA and the antenna.
  • FIG. 4 is a logic control configuration diagram of a four-band GSM transceiver in accordance with a preferred embodiment of the present invention. As shown in FIG.
  • the four-band GSM transceiver includes, in addition to: the antenna 1 and the PA 10, a single-pole quad-band antenna switch 2, two single-pole dual-switches 3 and 4, and four Filters 5, 6, 7, and 8 of different frequency bands, and a radio frequency transceiver chip 9 having two receiving channels.
  • the single-pole four-throw dual-frequency antenna switch 2 is respectively connected with the antenna and two filter selection units; the two single-pole double-throw switches 3 and 4 are respectively connected to the two receiving frequency band channels corresponding to the dual-frequency antenna switch. It can be seen from FIG.
  • each single-pole double-throw switch can select one of the two filters corresponding thereto to perform a filtering operation; each single-pole double-throw switch is disposed at the front end of its corresponding two filters.
  • the radio-transceiver chips 5, 6, 7, and 8 having two receiving channels, wherein one receiving channel and the low-band GSM850 filter respectively The output of the low-band GSM900 filter is connected, and the other receive channel is connected to the output of the high-band GSM1800 filter and the high-band GSM1900 filter, respectively.
  • the transmitting channel of the RF transceiver chip is connected to the PA 10, and the RF transceiver chip transmits the signal through the PA and the antenna.
  • the RF transceiver chip transmits the signal through the PA and the antenna.
  • the single-pole double-throw switch on the frequency receiving channel performs the selection of the GSM850 band and the GSM900 band, thereby entering different SAW filters, and the differential output channels are combined and then enter the RF transceiver chip low-frequency LNA for further processing;
  • the GSM1800 band and the GSM1900 band are selected to enter different SAW filters, and their differential output channels are combined and then entered into the RF transceiver chip high-frequency LNA for further processing.
  • a wireless terminal including, but not limited to, the above-described four-band GSM transceiver.
  • the four-band GSM transceiver refer to the descriptions of FIG. 3 to FIG. 4, and details are not described herein again.
  • the GSM quad-band scheme can be implemented relatively easily by using the above-mentioned four-band GSM transceiver.
  • Time-division multiplexing of the RF transmit module or dual-frequency antenna switch differentiates the received or transmitted signal to provide a suitable hardware link; when in the receive state, the corresponding single-pole double-throw switch logic control selects the accurate SAW filter to receive
  • the channel implements strict filtering before entering the RF transceiver chip to ensure that the receiving performance of the terminal meets the design requirements.
  • the layout and routing are also simplified, further reducing the cost of designing the GSM quad-band wireless terminal product, and having no effect on the transceiver performance, and realizing the function of the normal transmission and reception of signals by the wireless terminal product.
  • modules or steps of the present invention can be implemented by a general-purpose computing device, which can be concentrated on a single computing device or distributed among multiple computing devices. On the network, optionally, they may be implemented by program code executable by the computing device such that they may be stored in the storage device by the computing device and, in some cases, may be different from The steps shown or described are performed sequentially, or they are separately fabricated into individual integrated circuit modules, or a plurality of modules or steps thereof are fabricated into a single integrated circuit module.
  • the invention is not limited to any specific combination of hardware and software.
  • the above is only a preferred embodiment of the present invention, and is not intended to limit the present invention.
  • various modifications and changes can be made in the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and scope of the present invention are intended to be included within the scope of the present invention.

Abstract

本实用新型公开了一种四频段GSM收发装置及无线终端，该GSM收发装置除了包括：天线，还包括：双频天线开关，分别与天线和两个滤波器选择单元相连接；两个滤波器选择单元，其输入端分别连接在双频天线开关对应的两个接收频段通道上；四个不同频段的滤波器，其中两个滤波器的输入端均与两个滤波器选择单元中的同一个相连接，其余两个滤波器的输入端均与两个滤波器选择单元中的另一个相连接；具有两个接收通道的射频收发芯片，其中，一个接收通道分别与其中两个滤波器的输出端相连接，另一个接收通道分别与其余两个滤波器的输出端相连接。根据本实用新型提供的技术方案，可以降低布局走线的困难，最大程度地降低四频GSM方案的硬件成本。

Description

四频段 GSM 4 装置及无线终端 技术领域 本实用新型涉及通信领 i或， 具体而言， 涉及一种四频段全球移动通信
( Global system for Mobile Communication, 简称为 GSM ) 收发装置及无线 终端。 背景技术 由于 GSM手机等终端产品的普及以及低成本的优势， 市场占有率较高， 目前较为常见的低端手机基本都是 GSM双频手机， 这是由于目前进行 GSM 四频手机的设计会带来较高的成本。 目前， 一个四频段 GSM手机需要用到一个单刀六 4郑的天线开关， 一个 具备四频发射功能和端口的射频功率放大器 （ PA ), 在四个频段上分别配一 个声表面波 （SAW ) 滤波器， 最后进入四个接收通道 具体可以参见图 1和图 2。 图 1为相关技术中四频段发射和接收机的硬件设计构架图。 图 2为图 1 所示的普通四频段发射和接收机逻辑控制配置关系图。 从图 2中可以看到， 发射机有两根发射线和四根接收线， 这样天线开关为单刀六掷， 需要有六种 状态， 即天线开关具有六种逻辑状态。 并且接收机也需要四组差分对才能完 成对四个频段的接收。 所以可以有如下的结论， 就是按照图 1的方案， 会造 成天线开关会有很多状态， 发射机和接收机的引脚也会很多， 不但造成发射 机和接收机硬件成本的增加， 而且会因为发射和接收的很多引脚和走线而造 成布局走线的困难。 实用新型内容 针对相关技术中四频 GSM发射机和接收机的引脚较多， 导致布局走线 的困难以及硬件成本增加等问题， 本实用新型提供了一种四频段 GSM收发 装置及无线终端， 以解决上述问题至少之一。 根据本实用新型的一个方面， 提供了一种四频段 GSM收发装置。 根据本实用新型的四频段 GSM收发装置除了包括： 天线， 还包括： 双 频天线开关， 分别与所述天线和两个滤波器选择单元相连接； 所述两个滤波 器选择单元， 其输入端分别连接在所述双频天线开关对应的两个接收频段通 道上， 其中， 每个所述滤波器选择单元用于在与其连接的至少两个滤波器中 选择一个执行滤波操作； 四个不同频段的滤波器， 其中两个滤波器的输入端 均与所述两个滤波器选择单元中的同一个相连接， 其余两个滤波器的输入端 均与所述两个滤波器选择单元中的另一个相连接； 具有两个接收通道的射频 收发芯片，其中， 一个接收通道分别与所述其中两个滤波器的输出端相连接， 另一个接收通道分别与所述其余两个滤波器的输出端相连接。 上述两个滤波器选择单元均为单刀双掷开关。 上述四个不同频段的滤波器均为声表面波 （SAW ) 滤波器。 上述其中两个滤波器均为高频段滤波器， 其中， 所述高频段滤波器对应 的频段高于预定阈值； 上述其余两个滤波器均为低频段滤波器， 其中， 所述 低频段滤波器对应的频段低于所述预定阈值。 上述射频收发芯片包括： 低频 LNA和高频 LNA; 所述高频段滤波器通 过所述射频收发芯片的一个接收通道与所述高频 LNA相连接； 所述低频段 滤波器通过所述射频收发芯片的另一个接收通道与所述低频 LNA相连接。 上述高频段滤波器对应的频段为 GSM 1800频段和 GSM 1900频段； 所 述氐频段滤波器对应的频段为 GSM 850频段和 GSM 900频段。 上述收发装置还包括： 射频功率放大器， 位于所述双频天线开关与所述 射频收发芯片之间的发射通道上； 所述双频天线开关和所述射频功率放大器 集成于一个射频发射模块中。 上述天线为具有四频收发功能的无源器件。 才艮据本实用新型的另一方面， 提供了一种无线终端。 根据本实用新型的无线终端包括前述任一种四频段 GSM收发装置。 通过本实用新型， 釆用一个双频天线开关和两个滤波器选择单元选择合 适的 SAW滤波器来实现 GSM四频方案， 解决了相关技术中四频 GSM发射 机和接收机的引脚较多， 导致布局走线的困难以及硬件成本增加等问题， 进 而可以降氏布局走线的困难， 最大程度地降氏四频 GSM方案的硬件成本。 附图说明 此处所说明的附图用来提供对本实用新型的进一步理解， 构成本申请的 一部分， 本实用新型的示意性实施例及其说明用于解释本实用新型， 并不构 成对本实用新型的不当限定。 在附图中： 图 1为相关技术中四频段发射和接收机的硬件设计构架图； 图 2为图 1所示的四频段发射和接收机逻辑控制配置关系图； 图 3为根据本实用新型实施例的四频段 GSM收发装置的硬件设计构架 图； 图 4为根据本实用新型优选实施例的四频段 GSM收发装置的逻辑控制 配置关系图。 具体实施方式 下文中将参考附图并结合实施例来详细说明本实用新型。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组合。 根据本实用新型实施例， 提供了一种四频段 GSM收发装置。 图 3为根据本实用新型实施例的四频段 GSM收发装置的硬件设计构架 图。 如图 3所示， 该四频段 GSM收发装置除了包括： 天线 1 , 还包括： 双频 天线开关 2、 两个滤波器选择单元 3和 4、 四个不同频段的滤波器 5、 6、 7 和 8、 以及具有两个接收通道的射频收发芯片 9。 其中， 双频天线开关 2, 分别与天线 1和两个滤波器选择单元 3和 4相连接； 两个滤波器选择单元 3和 4 , 其输入端分别连接在双频天线开关对应的 两个接收频段通道上， 其中， 每个滤波器选择单元用于在与其连接的至少两 个滤波器中选择一个执行滤波操作 （例如， 滤波器选择单元 3可以在与其连 接的滤波器 5、 6中选择一个执行滤波操作）； 四个不同频段的滤波器 5、 6、 7和 8 , 其中两个滤波器 5和 6的输入端 均与两个滤波器选择单元中的同一个滤波器选择单元 3相连接， 其余两个滤 波器 7和 8的输入端均与两个滤波器选择单元中的另一个滤波器选择单元 4 相连接； 具有两个接收通道的射频收发芯片 9 , 其中， 一个接收通道分别与上述 两个滤波器 5和 6的输出端相连接， 另一个接收通道分别与上述两个滤波器 7和 8的输出端相连接。 在上述装置中， 釆用一个双频天线开关和两个滤波器选择单元选择合适 的滤波器来实现 GSM四频方案，解决了相关技术中四频 GSM发射机和接收 机的引脚较多， 导致布局走线的困难以及硬件成本增加等问题， 进而可以降 氐布局走线的困难， 最大程度地降氏四频 GSM方案的硬件成本。 其中， 上述天线可以为具有四频收发功能的无源器件。 优选地， 两个滤波器选择单元可以均为单刀双掷开关。 当然， 在具体实 施过程中， 还可以釆用其他元器件来实现滤波器的选择功能。 例如： 射频双 工器等。 釆用单刀双掷开关， 易于实现滤波器的选择功能， 且制造成本较低。 优选地， 四个不同频段的滤波器可以均为声表面波（ SAW ) 滤波器。 釆用声表面波滤波器进行滤波， 滤波效果较好。 当然， 在具体实施过程 中， 也可以釆用其他滤波器对接收到的信号进行滤波。 优选地， 上述其中两个滤波器可以设置为高频段滤波器， 其中， 高频段 滤波器对应的频段高于预定阈值； 上述其余两个滤波器可以设置为低频段滤 波器， 其中， 低频段滤波器对应的频段低于预定阈值。 其中，上述高频段滤波器对应的频段通常为 GSM 1800频段和 GSM 1900 频段。上述低频段滤波器对应的频段通常为 GSM 850频段和 GSM 900频段。 优选地， 上述射频收发芯片包括但不限于： 低频 LNA和高频 LNA; 其 中， 上述高频段滤波器可以通过射频收发芯片的一个接收通道与高频 LNA 相连接； 低频段滤波器通过射频收发芯片的另一个接收通道与低频 LNA相 连接。 在优选实施过程中， 可以在氏频接收通道上增加一个单刀双掷开关， 进 行 GSM850和 GSM900的选择， 从而进入不同的 SAW滤波器， 他们的差分 输出通道合并后进入射频收发芯片低频 LNA进行下一步处理； 在高频接收 通道上也增加一个单刀双掷开关， 进行 GSM1800和 GSM1900的选择， 从而 进入不同的 SAW滤波器， 他们的差分输出通道合并后进入射频收发芯片高 频 LNA进行下一步处理。 需要注意的是， 上述四频段 GSM收发装置还可以包括： 一个射频功率 放大器， 位于双频天线开关与射频收发芯片之间的发射通道上， 在具体实施 过程中， 上述双频天线开关 2和该射频功率放大器可以集成于一个射频发射 模块中， 也可以独立布局。 射频收发芯片 9可以将信号经由 PA和天线发送 出去， 具体可以参见相关技术中的记载， 此处不再赞述。 以下结合图 4的示例描述上述优选实施方式。 图 4为根据本实用新型优选实施例的四频段 GSM收发装置的逻辑控制 配置关系图。 如图 4所示， 该四频段 GSM收发装置除了包括： 天线 1 以及 PA 10之夕卜， 还可以包括： 单刀四才郢双频天线开关 2、 两个单刀双才郢开关 3 和 4、 四个不同频段的滤波器 5、 6、 7和 8, 以及具有两个接收通道的射频 收发芯片 9。 单刀四掷双频天线开关 2 , 分别与天线和两个滤波器选择单元相连接； 两个单刀双掷开关 3和 4, 其输入端分别连接在双频天线开关对应的两 个接收频段通道上， 其中， 由图 6可以看出， 每个单刀双掷开关可以在与其 对应的 2个滤波器中选择 1个执行滤波操作； 每个单刀双掷开关设置在其对 应的 2个滤波器的前端， 通过这种处理， 便于实现四频的功能需求， 布局走 线更为简化； 具有两个接收通道的射频收发芯片 5、 6、 7和 8, 其中， 一个接收通道 分别与低频段 GSM850滤波器和低频段 GSM900滤波器的输出端相连接，另 一个接收通道分别与高频段 GSM1800滤波器和高频段 GSM1900滤波器的输 出端相连接。 需要注意的是， 如图 4所示， 射频收发芯片的发射通道与 PA 10相连接， 射频收发芯片将信号经由 PA和天线发送出去， 具体可以参见相关技术中的 记载， jt匕处不再赘述。 进一步地， 通过在单刀四掷双频天线开关和射频收发芯片之间的高氐频 接收通道上， 分别设置了两个单刀双掷开关， 可以对频段进行选择。 具体地， 氐频接收通道上的单刀双掷开关，进行 GSM850频段和 GSM900频段的选择， 从而进入不同的 SAW滤波器， 它们的差分输出通道合并后进入射频收发芯 片低频 LNA进行下一步处理； 高频接收通道上的单刀双掷开关， 进行
GSM1800频段和 GSM1900频段的选择， 从而进入不同的 SAW滤波器， 他 们的差分输出通道合并后进入射频收发芯片高频 LNA进行下一步处理。 才艮据本实用新型实施例， 还提供了一种无线终端， 该无线终端包括但不 限于上述四频段 GSM收发装置。 其中， 该四频段 GSM收发装置可以参见图 3至图 4的描述， 此处不再赘述。 综上所述， 借助本实用新型提供的上述实施例， 釆用上述四频段 GSM 收发装置， 可以较容易地实现 GSM四频方案。 经过射频发射模块或者双频 天线开关 （ ASM ) 时分复用将接收或发射的信号区分提供合适的硬件链路； 当处于接收状态时， 相应的单刀双掷开关逻辑控制选择准确的 SAW滤波器 接收通道， 实现进入射频收发芯片前的严格滤波处理， 确保终端的接收性能 符合设计要求。在电路实现方面，布局、走线也更为简化，进一步降低了 GSM 四频无线终端产品设计的成本， 并对收发性能没有任何影响， 实现了无线终 端产品的正常收发信号的功能。 显然， 本领域的技术人员应该明白， 上述的本实用新型的各模块或各步 骤可以用通用的计算装置来实现， 它们可以集中在单个的计算装置上， 或者 分布在多个计算装置所组成的网络上， 可选地， 它们可以用计算装置可执行 的程序代码来实现，从而，可以将它们存储在存储装置中由计算装置来执行， 并且在某些情况下， 可以以不同于此处的顺序执行所示出或描述的步骤， 或 者将它们分别制作成各个集成电路模块， 或者将它们中的多个模块或步骤制 作成单个集成电路模块来实现。 这样， 本实用新型不限制于任何特定的硬件 和软件结合。 以上仅为本实用新型的优选实施例而已， 并不用于限制本实用新型， 对 于本领域的技术人员来说， 本实用新型可以有各种更改和变化。 凡在本实用 新型的精神和原则之内， 所作的任何修改、 等同替换、 改进等， 均应包含在 本实用新型的保护范围之内。

Claims

权 利 要 求 书 一种四频段全球移动通信 GSM收发装置， 包括： 天线， 所述收发装置 还包括：
双频天线开关， 分别与所述天线和两个滤波器选择单元相连接； 所述两个滤波器选择单元， 其输入端分别连接在所述双频天线开 关对应的两个接收频段通道上， 其中， 每个所述滤波器选择单元用于 在与其连接的至少两个滤波器中选择一个执行滤波操作；
四个不同频段的滤波器， 其中两个滤波器的输入端均与所述两个 滤波器选择单元中的同一个相连接， 其余两个滤波器的输入端均与所 述两个滤波器选择单元中的另一个相连接；
具有两个接收通道的射频收发芯片， 其中， 一个接收通道分别与 所述其中两个滤波器的输出端相连接， 另一个接收通道分别与所述其 余两个滤波器的输出端相连接。 根据权利要求 1所述的收发装置, 其中， 所述两个滤波器选择单元均 为单刀双 4郑开关。 根据权利要求 1所述的收发装置, 其中， 所述四个不同频段的滤波器 均为声表面波 SAW滤波器。 根据权利要求 1所述的收发装置， 其中，
所述其中两个滤波器均为高频段滤波器， 其中， 所述高频段滤波 器对应的频段高于预定阈值；
所述其余两个滤波器均为低频段滤波器， 其中， 所述低频段滤波 器对应的频段低于所述预定阈值。 根据权利要求 4所述的收发装置， 其中， 所述射频收发芯片包括： 低 频 LNA和高频 LNA;
所述高频段滤波器通过所述射频收发芯片的一个接收通道与所述 高频 LNA相连接； 所述低频段滤波器通过所述射频收发芯片的另一个接收通道与所 述氐频 LNA相连接。
6. 根据权利要求 4所述的收发装置， 其中，
所述高频段滤波器对应的频段为 GSM 1800频段和 GSM 1900频 段；
所述低频段滤波器对应的频段为 GSM 850频段和 GSM 900频段。
7. 根据权利要求 1所述的收发装置， 其中，
所述收发装置还包括： 射频功率放大器， 位于所述双频天线开关 与所述射频收发芯片之间的发射通道上；
所述双频天线开关和所述射频功率放大器集成于一个射频发射模 块中。
8. 根据权利要求 1所述的收发装置， 其中， 所述天线为具有四频收发功 能的无源器件。
9. 一种无线终端， 所述无线终端包括如权利要求 1至 8中任一项所述的 四频段 GSM收发装置。
PCT/CN2011/071420 2010-12-17 2011-03-01 四频段gsm收发装置及无线终端 WO2012079308A1 (zh)

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CN102437864B (zh) * 2011-09-13 2014-04-02 惠州Tcl移动通信有限公司 射频信号收发模块和手机
CN103780280B (zh) 2014-02-27 2016-06-15 华为技术有限公司 射频通路
CN106506036A (zh) * 2016-11-16 2017-03-15 珠海市魅族科技有限公司 射频电路和移动终端

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101882941A (zh) * 2010-07-07 2010-11-10 中兴通讯股份有限公司 一种全球移动通讯系统四频收发的装置及设备

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101882941A (zh) * 2010-07-07 2010-11-10 中兴通讯股份有限公司 一种全球移动通讯系统四频收发的装置及设备

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