WO2021174565A1 - 平衡放大器和射频信号的功率放大方法 - Google Patents

平衡放大器和射频信号的功率放大方法 Download PDF

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WO2021174565A1
WO2021174565A1 PCT/CN2020/078631 CN2020078631W WO2021174565A1 WO 2021174565 A1 WO2021174565 A1 WO 2021174565A1 CN 2020078631 W CN2020078631 W CN 2020078631W WO 2021174565 A1 WO2021174565 A1 WO 2021174565A1
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radio frequency
frequency signal
output
switch
power
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PCT/CN2020/078631
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English (en)
French (fr)
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顾建忠
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芯朴科技(上海)有限公司
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Publication of WO2021174565A1 publication Critical patent/WO2021174565A1/zh

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    • 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
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
    • H03F3/189—High-frequency amplifiers, e.g. radio frequency amplifiers

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  • the present invention relates to the field of wireless communication technology, and in particular to a method for power amplification of a balanced amplifier and a radio frequency signal.
  • the traditional radio frequency power amplifier there is a balanced amplifier.
  • This type of amplifier divides the input signal into two channels for amplification respectively, and then realizes power synthesis at the output end.
  • This type of architecture can achieve higher output power, while the balanced amplifier also has characteristics such as insensitivity to the output load.
  • MIMO multiple input-output
  • Each transmission and reception channel has a set of independent transmission power amplifiers, switches, filters, and receiving low-noise amplifiers.
  • Current 5G mobile terminals generally require support for 2-channel upload transmission and 4-channel download reception (2T4R).
  • the transmission power of mobile terminals that support 2-channel upload transmission requires ordinary transmission power, for example, the antenna port requires 23dBm.
  • some mobile terminals require 1 channel upload transmission and 4 channels download reception (1T4R). At this time, 1 channel upload transmission power requires high power (HPUE). The transmission power is 3dB higher than the single channel transmission power of 2T4R. The antenna port requires Reach 26dBm.
  • the purpose of the present invention is to provide a balanced amplifier, which saves MIMO radio frequency paths and devices, and improves the transmission power.
  • An embodiment of the present application provides a balanced amplifier, including:
  • Input switch wherein at least one radio frequency signal is coupled to the input switch
  • First and second branches are respectively connected to the input switch, and respectively used to amplify one of the at least one radio frequency signal;
  • An output switch the output switch is respectively connected to the first and second branches, and outputs the amplified at least one radio frequency signal to at least one radio frequency antenna.
  • the first branch includes a first phase shift unit, a first power amplifier, and a second phase shift unit connected in sequence.
  • the first phase shift unit includes a first capacitor coupled between the input switch and ground, and a first capacitor coupled between the input switch and the first power amplifier.
  • the second phase shift unit includes a second capacitor coupled between the first power amplifier and the output switch, and a second inductor coupled between the output switch and the ground Device.
  • the second branch includes a third phase shift unit, a second power amplifier, and a fourth phase shift unit connected in sequence.
  • the third phase shift unit includes a third inductor coupled between the input switch and ground, and a third inductor coupled between the input switch and the second power amplifier. Three capacitors.
  • the fourth phase shift unit includes a fourth inductor coupled between the second power amplifier and the output unit and a fourth inductor coupled between the output unit and the ground. Capacitor.
  • two radio frequency signals are respectively coupled to the input switch, the first or second branch amplifies one of the radio frequency signals, and the output switch outputs the amplified radio frequency signal to a radio frequency antenna.
  • two radio frequency signals are respectively coupled to the input switch, the first and second branches respectively amplify one of the radio frequency signals, and the output switch respectively outputs the amplified radio frequency signals to a separate Radio frequency antenna.
  • Another embodiment of the present application provides a method for amplifying radio frequency signal power, including:
  • Input at least one radio frequency signal to at least the input switch, and output the at least one radio frequency signal to the first or second branch through the input switch;
  • the first and/or second branches are respectively used to amplify one of the at least one radio frequency signal
  • the amplified at least one radio frequency signal is respectively output to at least one radio frequency antenna through an output switch.
  • one of the at least one radio frequency signal is input to the first branch with half the power, and the first branch sequentially shifts the phase of the radio frequency signal by 45° and amplifies it by n Times, and then phase shift -45°.
  • one of the at least one radio frequency signal is input to the second branch with half the power, and the first branch sequentially shifts the radio frequency signal by -45° and amplifies it. n times, the phase shift is 45°.
  • the balanced amplifier can realize low-cost 2T4R and 1T4R solutions. At the same time, when combined with low power transmission, some branches of the amplifier can be turned on. Reduce the amplifier current and power consumption, while significantly reducing the cost and volume of the RF front-end 2T4R and 1T4R.
  • the feature A+B+C is disclosed, and in another example, the feature A+B+D+E is disclosed, and the features C and D are equivalent technical means that play the same role.
  • Feature E can be combined with feature C technically. Then, the solution of A+B+C+D should not be regarded as recorded because it is technically infeasible, and A+B+ The C+E plan should be deemed to have been documented.
  • Fig. 1 is a block diagram of a balanced amplifier in an embodiment of the present invention.
  • Fig. 2 is a schematic circuit diagram of a balanced amplifier with a radio frequency signal input in an embodiment of the present invention.
  • Fig. 3 is a schematic circuit diagram of a balanced amplifier with a radio frequency signal input in an embodiment of the present invention.
  • Fig. 4 is a schematic circuit diagram of a balanced amplifier with two RF signal inputs in another embodiment of the present invention.
  • Fig. 5 is a schematic circuit diagram of a balanced amplifier with two RF signal inputs in another embodiment of the present invention.
  • Fig. 6 is a schematic circuit diagram of a balanced amplifier with two radio frequency signal inputs in another embodiment of the present invention.
  • Fig. 7 is a flowchart of a method for amplifying radio frequency signal power in an embodiment of the present invention.
  • a balanced amplifier is provided. Refer to FIG. 1 for a block diagram of the balanced amplifier.
  • the balanced amplifier includes:
  • Input switch 101 wherein at least one radio frequency signal RFin is coupled to the input switch 101;
  • First and second branches 102, 103, the first and second branches 102, 103 are respectively connected to the input switch 101, and respectively used to amplify one of the at least one radio frequency signal RFin;
  • An output switch 105, the output switch 104 is respectively connected to the first and second branches 102, 103, and outputs the amplified at least one radio frequency signal RFin to at least one radio frequency antenna ANT.
  • the circuit schematic diagram of the balanced amplifier is shown in FIG. 2, and the balanced amplifier includes an input switch 211, first and second branches, and an output switch 212.
  • the first branch includes a first phase shift unit, a first power amplifier 203, and a second phase shift unit connected in sequence.
  • the first phase shift unit includes a first capacitor 201 coupled between the input switch 211 and ground, and a first capacitor 201 coupled between the input switch 211 and the first power amplifier 203.
  • the second phase shift unit includes a second capacitor 204 coupled between the first power amplifier 203 and the output switch 212, and a second capacitor 204 coupled between the output switch 212 and the output switch 212.
  • the second inductor 205 between the ground terminals.
  • the second branch includes a third phase shift unit, a second power amplifier 208, and a fourth phase shift unit connected in sequence.
  • the third phase shift unit includes a third inductor 206 coupled between the input switch 211 and ground, and a third inductor 206 coupled between the input switch 211 and the second power amplifier 208
  • the fourth phase shift unit includes a fourth inductor 209 coupled between the second power amplifier 208 and the output unit 212, and a fourth inductor 209 coupled between the output unit 212 and the output unit 212.
  • the fourth capacitor 210 between the ground terminals.
  • the input radio frequency signal RFin passes through the input switch 211, half of the signal (half the power) passes through the first capacitor 201 connected in parallel to the ground and the first inductor 202 connected in series to form a 45° phase shift to the input of the first power amplifier 203
  • the first power amplifier 203 amplifies the signal by n times, and the second capacitor 204 connected in series with the output matching network and the second inductor 205 connected in parallel to the ground form a phase shift of -45°.
  • the other half of the signal (half of the power) passes through the third capacitor 206 connected in parallel to the ground and the third inductor 207 connected in series to form a -45° phase shift to the input end of the second power amplifier 208.
  • the signal is amplified by n times, and the fourth inductor 209 connected in series with the output matching network and the fourth capacitor 210 connected in parallel to the ground form a 45° phase shift.
  • the two signals achieve equal amplitude and phase power synthesis, and output to the antenna ANT through the output switch to achieve high power output of HPUE.
  • the balanced amplifier of this embodiment is basically the same as the balanced amplifier of the first embodiment. The difference is: as shown in FIG. 3, the input radio frequency signal RFin is input to the input switch 311 with half power, and the half power radio frequency signal RFin is connected in parallel.
  • the first capacitor 301 connected to the ground and the first inductor 302 connected in series form a phase shift of 45° to reach the input end of the first power amplifier 303.
  • the capacitor 304 and the second inductor 305 connected in parallel to the ground form a phase shift of -45° to the output switch 312, and output to the antenna ANT through the output switch.
  • the working current of the amplifier can be reduced, and the power consumption can be reduced without the need for a high-power output state of the HPUE.
  • the input switch 311 and the output switch 312 can also be used to switch the radio frequency signal to be amplified through the second branch, which can achieve the same technical effect, and will not be repeated here.
  • the balanced amplifier of this embodiment is basically the same as the balanced amplifier of the first embodiment. The difference is: two radio frequency signals are respectively coupled to the input switch, the first or second branch amplifies one of the radio frequency signals, and the output The switch outputs the amplified radio frequency signal to a radio frequency antenna.
  • radio frequency signals RFinA and RFinB there are two input radio frequency signals RFinA and RFinB in this embodiment.
  • RFinA After the radio frequency signal RFinA passes through the input switch 411, RFinA passes through the first capacitor 401 connected in parallel to the ground and the first capacitor 401 connected in series with half the power.
  • An inductor 402 forms a phase shift of 45° and reaches the input end of the first power amplifier 403.
  • the first power amplifier 403 amplifies the signal by n times, and passes through the second capacitor 404 connected in series with the output matching network and the second inductor connected in parallel to the ground. 405, forming a phase shift of -45°.
  • the other half of the radio frequency signal RFinA passes through the third capacitor 406 connected in parallel to the ground and the third inductor 407 connected in series to form a phase shift of -45° to the input end of the second power amplifier 408.
  • the second power amplifier 408 amplifies the signal by n
  • the fourth inductor 409 connected in series through the output matching network and the fourth capacitor 410 connected in parallel to ground form a phase shift of -45°.
  • the two signals achieve equal amplitude and phase power synthesis, and are output to the second antenna ANT2 to achieve high power output of HPUE.
  • the balanced amplifier of this embodiment is basically the same as the balanced amplifier of the first embodiment. The difference is: two radio frequency signals are respectively coupled to the input switch, the first or second branch amplifies one of the radio frequency signals, and the output The switch outputs the amplified radio frequency signal to a radio frequency antenna.
  • radio frequency signals RFinA and RFinB there are two input radio frequency signals RFinA and RFinB.
  • RFinB passes through the first capacitor 501 connected in parallel to the ground and the first capacitor 501 connected in series with half the power.
  • An inductor 502 forms a phase shift of 45° and reaches the input end of the first power amplifier 503.
  • the first power amplifier 503 amplifies the signal by n times, and passes through a second capacitor 504 connected in series with the output matching network and a second inductor connected in parallel to ground 505, forming a phase shift of -45°.
  • the other half of the radio frequency signal RFinB passes through the third capacitor 506 connected in parallel to the ground and the third inductor 507 connected in series to form a phase shift of -45° to the input end of the second power amplifier 508.
  • the second power amplifier 508 amplifies the signal by n
  • the fourth inductor 509 connected in series through the output matching network and the fourth capacitor 510 connected in parallel to ground form a phase shift of -45°.
  • the two signals realize equal amplitude and phase power synthesis, and output to the first antenna ANT1 to realize HPUE high power output.
  • the fourth and fifth embodiments can realize the single-ended output of the signal, and only turn on part of the branches of the balanced amplifier, thereby reducing the current and power consumption of the amplifier.
  • the balanced amplifier of this embodiment is basically the same as the balanced amplifiers of the fourth and fifth embodiments. The difference is that: two radio frequency signals are respectively coupled to the input switch, and the first and second branches respectively amplify one of the radio frequency signals, The output switches respectively output the amplified radio frequency signals to separate radio frequency antennas.
  • radio frequency signals RFinA and RFinB there are input radio frequency signals RFinA and RFinB.
  • the radio frequency signal RFinA is input to the input switch 611 with half the power, and passes through the first capacitor 601 connected in parallel to the ground and the first inductor connected in series. 602.
  • a phase shift of 45° is formed to reach the input end of the first power amplifier 603.
  • the first power amplifier 603 amplifies the signal by n times, and passes through a second capacitor 604 connected in series with the output matching network and a second inductor 605 connected in parallel to the ground.
  • a phase shift of -45° is formed, and it is output to the first antenna ANT1 after passing through the output switch 612.
  • the radio frequency signal RFinA After the radio frequency signal RFinA is input to the input switch 611 with half power, it passes through the third capacitor 606 connected in parallel to the ground and the third inductor 607 connected in series to form a phase shift of -45° to the input end of the second power amplifier 608.
  • the amplifier 608 amplifies the signal by n times, passes through the fourth inductor 609 connected in series with the output matching network and the fourth capacitor 610 connected in parallel to the ground to form a -45° phase shift, and then outputs to the second antenna ANT2 after passing through the output switch 612.
  • the HPUE high power when the HPUE high power is not required, two simultaneous transmissions are realized.
  • a new type of balanced amplifier supporting dual antennas is proposed, which can realize a low-cost 2T4R solution, and significantly reduces the cost and volume of the 2T4R front-end radio frequency.
  • FIG. 7 is a flowchart of the method for power amplification of radio frequency signals in this embodiment. The method includes:
  • Step S101 input at least one radio frequency signal to at least an input switch, and output the at least one radio frequency signal to the first or second branch through the input switch;
  • Step S102 the first and/or second branches are respectively used to amplify one of the at least one radio frequency signal
  • Step S103 Output the at least one amplified radio frequency signal to at least one radio frequency antenna through an output switch.
  • one of the at least one radio frequency signal is input to the first branch with half the power, and the first branch sequentially shifts the phase of the radio frequency signal by 45° and amplifies it by n Times, and then phase shift -45°.
  • one of the at least one radio frequency signal is input to the second branch with half the power, and the first branch sequentially shifts the radio frequency signal by -45° and amplifies it. n times, the phase shift is 45°.
  • an act is performed based on a certain element, it means that the act is performed at least based on that element, which includes two situations: performing the act only based on the element, and performing the act based on the element and Other elements perform the behavior.
  • Multiple, multiple, multiple, etc. expressions include two, two, two, and two or more, two or more, and two or more expressions.

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Abstract

本申请公开了一种平衡放大器，该平衡放大器包括输入开关，其中至少一个射频信号耦接到所述输入开关；第一和第二支路，所述第一和第二支路分别连接所述输入开关，并分别用于放大所述至少一个射频信号中的一个；输出开关，所述输出开关分别连接所述第一和第二支路，并将放大后的所述至少一个射频信号分别输出到至少一个射频天线。本申请还公开一种射频信号的功率放大方法，该方法包括输入至少一个射频信号至少输入开关，通过所述输入开关将所述至少一个射频信号输出到第一或第二支路；所述第一和/或第二支路分别用于放大所述至少一个射频信号中的一个；通过输出开关分别将放大后的所述至少一个射频信号输出到至少一个射频天线。

Description

平衡放大器和射频信号的功率放大方法 技术领域
本发明涉及无线通信技术领域，且特别涉及一种平衡放大器、射频信号的功率放大方法。
背景技术
在传统的射频功率放大器中，存在平衡放大器，该类型放大器把输入信号分为两路分别进行放大，之后再输出端实现功率合成。该类型架构可以实现更高的输出功率，同时平衡放大器还存在对输出负载不敏感等特性。在无线通信设备中为了提高上传或者下载速率，目前普遍采用多输入输出(MIMO)方案，每一路发射接收通路，都有一套独立的发射功率放大器、开关、滤波器和接收低噪声放大器。目前的5G移动终端普遍要求支持2路上传发射和4路下载接收(2T4R)，支持2路上传发射的移动终端发射功率要求普通发射功率，例如天线口要求达到23dBm。同时也有部分移动终端要求1路上传发射和4路下载接收(1T4R)，此时1路上传发射功率要求支持高功率(HPUE)，发射功率相比2T4R的单路发射功率高3dB，天线口要求达到26dBm。
发明内容
本发明的目的在于提供一种平衡放大器，节省MIMO的射频通路和器件，提高发射功率。
本申请的一实施例中提供一种平衡放大器，包括：
输入开关，其中至少一个射频信号耦接到所述输入开关；
第一和第二支路，所述第一和第二支路分别连接所述输入开关，并分别用于放大所述至少一个射频信号中的一个；
输出开关，所述输出开关分别连接所述第一和第二支路，并将放大后的所述至少一个射频信号分别输出到至少一个射频天线。
在一个优选例中，所述第一支路包括依次连接的第一相移单元、第一功率放大器和第二相移单元。
在一个优选例中，所述第一相移单元包括耦接在所述输入开关与地端之间的第一电容器和耦接在所述输入开关与所述第一功率放大器之间的第一电感器，所述第二相移单元包括耦接在所述第一功率放大器与所述输出开关之间的第二电容器和耦接在所述输出开关与所述地端之间的第二电感器。
在一个优选例中，所述第二支路包括依次连接的第三相移单元、第二功率放大器和第四相移单元。
在一个优选例中，所述第三相移单元包括耦接在所述输入开关与地端之间的第三电感器和耦接在所述输入开关与所述第二功率放大器之间的第三电容器，所述第四相移单元包括耦接在所述第二功率放大器与所述输出单元之间的第四电感器和耦接在所述输出单元与所述地端之间的第四电容器。
在一个优选例中，两个射频信号分别耦接到所述输入开关，所述第一或第二支路放大其中一个射频信号，所述输出开关将放大后的射频信号输出到一个射频天线。
在一个优选例中，两个射频信号分别耦接到所述输入开关，所述第一和第二支路分别放大其中一个射频信号，所述输出开关分别将放大后的射频信号输出到单独的射频天线。
本申请的另一实施例中提供一种射频信号的功率放大方法，包括：
输入至少一个射频信号至少输入开关，通过所述输入开关将所述至少一个射频信号输出到第一或第二支路；
所述第一和/或第二支路分别用于放大所述至少一个射频信号中的一个；
通过输出开关分别将放大后的所述至少一个射频信号输出到至少一个射频天线。
在一个优选例中，所述至少一个射频信号中的一个射频信号以二分之一功率输入到所述第一支路，所述第一支路依次将该射频信号相移45°，放大n倍，再相移-45°。
在一个优选例中，所述至少一个射频信号中的一个射频信号以二分之一功率输入到所述第二支路，所述第一支路依次将该射频信号相移-45°，放大n倍，再相移45°。
相对于现有技术，本申请的方法具有以下有益效果：
本申请中，提出了一种新型的支持单天线或双天线的平衡放大器，该平衡放大器可以实现低成本的2T4R和1T4R的方案，同时结合在低功率发射状态下，开启放大器的部分支路可降低放大器电流和功耗，同时显著的降低了射频前段2T4R和1T4R的成本和体积。
本申请的说明书中记载了大量的技术特征，分布在各个技术方案中，如果要罗列出本申请所有可能的技术特征的组合(即技术方案)的话，会使得说明书过于冗长。为了避免这个问题，本申请上述发明内容中公开的各个技术特征、在下文各个实施方式和例子中公开的各技术特征、以及附图中公开的各个技术特征，都可以自由地互相组合，从而构成各种新的技术方案(这些技术方案均应该视为在本说明书中已经记载)，除非这种技术特征的组合在技术上是不可行的。例如，在一个例子中公开了特征A+B+C，在另一个例子中公开了特征A+B+D+E，而特征C和D是起到相同作用的等同技术手段，技术上只要择一使用即可，不可能同时采用，特征E技术上可以与特征C相组合，则，A+B+C+D的方案因技术不可行而应当不被视为已经记载，而A+B+C+E的方案应当视为已经被记载。
附图说明
图1是本发明一实施例中平衡放大器的框图示意图。
图2是本发明一实施例中具有一个射频信号输入的平衡放大器的电路示意图。
图3是本发明一实施例中具有一个射频信号输入的平衡放大器的电路示意图。
图4是本发明另一实施例中具有两个射频信号输入的平衡放大器的电路示意图。
图5是本发明另一实施例中具有两个射频信号输入的平衡放大器的电路示意图。
图6是本发明另一实施例中具有两个射频信号输入的平衡放大器的电路示意图。
图7是本发明一实施例中射频信号的功率放大方法的流程图。
具体实施方式
在以下的叙述中，为了使读者更好地理解本申请而提出了许多技术细节。但是，本领域的普通技术人员可以理解，即使没有这些技术细节和基于以下各实施方式的种种变化和修改，也可以实现本申请各项权利要求所要求保护的技术方案。
为使本发明的目的、技术方案和优点更加清楚，下面将结合附图对本发明的实施方式作进一步地详细描述。
实施例一
本实施例中提供一种平衡放大器，该平衡放大器的框图参考图1所示，该平衡放大器包括：
输入开关101，其中至少一个射频信号RFin耦接到所述输入开关101；
第一和第二支路102、103，所述第一和第二支路102、103分别连接所 述输入开关101，并分别用于放大所述至少一个射频信号RFin中的一个；
输出开关105，所述输出开关104分别连接所述第一和第二支路102、103，并将放大后的所述至少一个射频信号RFin分别输出到至少一个射频天线ANT。
在一个优选例中，该平衡放大器的电路示意图参考图2所示，所述平衡放大器包括输入开关211、第一和第二支路、输出开关212。其中，所述第一支路包括依次连接的第一相移单元、第一功率放大器203和第二相移单元。在一个优选例中，所述第一相移单元包括耦接在所述输入开关211与地端之间的第一电容器201和耦接在所述输入开关211与所述第一功率放大器203之间的第一电感器202，所述第二相移单元包括耦接在所述第一功率放大器203与所述输出开关212之间的第二电容器204和耦接在所述输出开关212与所述地端之间的第二电感器205。
在一个优选例中，所述第二支路包括依次连接的第三相移单元、第二功率放大器208和第四相移单元。在一个优选例中，所述第三相移单元包括耦接在所述输入开关211与地端之间的第三电感器206和耦接在所述输入开关211与所述第二功率放大器208之间的第三电容器207，所述第四相移单元包括耦接在所述第二功率放大器208与所述输出单元212之间的第四电感器209和耦接在所述输出单元212与所述地端之间的第四电容器210。
输入的射频信号RFin经过输入开关211以后，信号的一半(功率的一半)经过并联对地的第一电容器201和串联的第一电感器202，形成45°相移到达第一功率放大器203的输入端，第一功率放大器203将该信号放大n倍，经过输出匹配网络串联的第二电容器204和并联对地的第二电感器205，形成-45°相移。信号的另外一半(功率的一半)经过并联对地的第三电容器206和串联的第三电感器207，形成-45°相移到达第二功率放大器208的输入端，第二功率放大器208将该信号放大n倍，经过输出匹配网络串联的第四电感器209和并联对地的第四电容器210，形成45°相移。在输出端口经过功率合 成开关212，两路信号实现等幅度同相位功率合成，通过输出开关输出到天线ANT，实现HPUE高功率输出。图2所示的输入或者输出匹配移相网络201和202，204和205，206和207，209和210都是一级匹配网络，也可能是多级匹配网络或者其他移相器件组成。
实施例二
本实施例的平衡放大器与实施例一的平衡放大器基本相同，区别在于：参考图3所示，输入的射频信号RFin以一半的功率输入到输入开关311，该一半功率的射频信号RFin经过并联对地的第一电容器301和串联的第一电感器302，形成45°相移到达第一功率放大器303的输入端，第一功率放大器303将该信号放大n倍，经过输出匹配网络串联的第二电容器304和并联对地的第二电感器305，形成-45°相移到达输出开关312，通过输出开关输出到天线ANT。本实施例中可以在不需要HPUE高功率输出状态下，降低放大器工作电流，降低功耗。本领域技术人员应当理解，本实施例中也可以通过输入开关311和输出开关312，将射频信号切换为经过第二支路进行放大，可以实现相同的技术效果，在此不做赘述。
实施例三
本实施例的平衡放大器与实施例一的平衡放大器基本相同，区别在于：两个射频信号分别耦接到所述输入开关，所述第一或第二支路放大其中一个射频信号，所述输出开关将放大后的射频信号输出到一个射频天线。
具体的，参考图4所示，本实施例中具有输入的两个射频信号RFinA、RFinB，射频信号RFinA经过输入开关411以后，RFinA以一半功率经过并联对地的第一电容器401和串联的第一电感器402，形成45°相移到达第一功率放大器403的输入端，第一功率放大器403将该信号放大n倍，经过输出匹配网络串联的第二电容器404和并联对地的第二电感器405，形成-45°相 移。射频信号RFinA的另外一半经过并联对地的第三电容器406和串联的第三电感器407，形成-45°相移到达第二功率放大器408的输入端，第二功率放大器408将该信号放大n倍，经过输出匹配网络串联的第四电感器409和并联对地的第四电容器410，形成-45°相移。在输出端口经过功率合成的输出开关412，两路信号实现等幅度同相位功率合成，并输出到第二天线ANT2，实现HPUE高功率输出。
实施例四
本实施例的平衡放大器与实施例一的平衡放大器基本相同，区别在于：两个射频信号分别耦接到所述输入开关，所述第一或第二支路放大其中一个射频信号，所述输出开关将放大后的射频信号输出到一个射频天线。
具体的，参考图5所示，本实施例中具有输入的两个射频信号RFinA、RFinB，射频信号RFinB经过输入开关511以后，RFinB以一半功率经过并联对地的第一电容器501和串联的第一电感器502，形成45°相移到达第一功率放大器503的输入端，第一功率放大器503将该信号放大n倍，经过输出匹配网络串联的第二电容器504和并联对地的第二电感器505，形成-45°相移。射频信号RFinB的另外一半经过并联对地的第三电容器506和串联的第三电感器507，形成-45°相移到达第二功率放大器508的输入端，第二功率放大器508将该信号放大n倍，经过输出匹配网络串联的第四电感器509和并联对地的第四电容器510，形成-45°相移。在输出端口经过功率合成的输出开关512，两路信号实现等幅度同相位功率合成，并输出到第一天线ANT1，实现HPUE高功率输出。
实施例四和实施例五可以实现信号的单端输出，仅开启平衡放大器的部分支路，从而降低放大器电流和功耗。
实施例五
本实施例的平衡放大器与实施例四和五的平衡放大器基本相同，区别在于：两个射频信号分别耦接到所述输入开关，所述第一和第二支路分别放大其中一个射频信号，所述输出开关分别将放大后的射频信号输出到单独的射频天线。
具体的，参考图6所示，本实施例中具有输入的射频信号RFinA、RFinB，射频信号RFinA以一半功率输入到输入开关611，经过并联对地的第一电容器601和串联的第一电感器602，形成45°相移到达第一功率放大器603的输入端，第一功率放大器603将该信号放大n倍，经过输出匹配网络串联的第二电容器604和并联对地的第二电感器605，形成-45°相移，经过输出开关612后输出到第一天线ANT1。射频信号RFinA以一半功率输入到输入开关611以后，经过并联对地的第三电容器606和串联的第三电感器607，形成-45°相移到达第二功率放大器608的输入端，第二功率放大器608将该信号放大n倍，经过输出匹配网络串联的第四电感器609和并联对地的第四电容器610，形成-45°相移，经过输出开关612后输出到第二天线ANT2。本实施例中在不需要HPUE高功率时，实现2路同时发射。
本实施例中提出了一种新型的支持双天线的平衡放大器，该平衡放大器可以实现低成本的2T4R的方案，显著的降低了射频前段2T4R的成本和体积。
实施例六
本实施例中提供一种射频信号的功率放大方法，图7是本实施例红射频信号的功率放大方法的流程图，该方法包括：
步骤S101，输入至少一个射频信号至少输入开关，通过所述输入开关将所述至少一个射频信号输出到第一或第二支路；
步骤S102，所述第一和/或第二支路分别用于放大所述至少一个射频信号中的一个；
步骤S103，通过输出开关分别将放大后的所述至少一个射频信号输出到至少一个射频天线。
在一个优选例中，所述至少一个射频信号中的一个射频信号以二分之一功率输入到所述第一支路，所述第一支路依次将该射频信号相移45°，放大n倍，再相移-45°。
在一个优选例中，所述至少一个射频信号中的一个射频信号以二分之一功率输入到所述第二支路，所述第一支路依次将该射频信号相移-45°，放大n倍，再相移45°。
需要说明的是，在本专利的申请文件中，诸如第一和第二等之类的关系术语仅仅用来将一个实体或者操作与另一个实体或操作区分开来，而不一定要求或者暗示这些实体或操作之间存在任何这种实际的关系或者顺序。而且，术语“包括”、“包含”或者其任何其他变体意在涵盖非排他性的包含，从而使得包括一系列要素的过程、方法、物品或者设备不仅包括那些要素，而且还包括没有明确列出的其他要素，或者是还包括为这种过程、方法、物品或者设备所固有的要素。在没有更多限制的情况下，由语句“包括一个”限定的要素，并不排除在包括所述要素的过程、方法、物品或者设备中还存在另外的相同要素。本专利的申请文件中，如果提到根据某要素执行某行为，则是指至少根据该要素执行该行为的意思，其中包括了两种情况：仅根据该要素执行该行为、和根据该要素和其它要素执行该行为。多个、多次、多种等表达包括2个、2次、2种以及2个以上、2次以上、2种以上。
在本说明书提及的所有文献都被认为是整体性地包括在本申请的公开内容中，以便在必要时可以作为修改的依据。此外应理解，以上所述仅为本说明书的较佳实施例而已，并非用于限定本说明书的保护范围。凡在本说明书一个或多个实施例的精神和原则之内，所作的任何修改、等同替换、改进等，均应包含在本说明书一个或多个实施例的保护范围之内。
在一些情况下，在权利要求书中记载的动作或步骤可以按照不同于实施例中的顺序来执行并且仍然可以实现期望的结果。另外，在附图中描绘的过程不一定要求示出的特定顺序或者连续顺序才能实现期望的结果。在某些实施方式中，多任务处理和并行处理也是可以的或者可能是有利的。

Claims (10)

  1. 一种平衡放大器，其特征在于，包括：
    输入开关，其中至少一个射频信号耦接到所述输入开关；
    第一和第二支路，所述第一和第二支路分别连接所述输入开关，并分别用于放大所述至少一个射频信号中的一个；
    输出开关，所述输出开关分别连接所述第一和第二支路，并将放大后的所述至少一个射频信号分别输出到至少一个射频天线。
  2. 如权利要求1所述的平衡放大器，其特征在于，所述第一支路包括依次连接的第一相移单元、第一功率放大器和第二相移单元。
  3. 如权利要求2所述的平衡放大器，其特征在于，所述第一相移单元包括耦接在所述输入开关与地端之间的第一电容器和耦接在所述输入开关与所述第一功率放大器之间的第一电感器，所述第二相移单元包括耦接在所述第一功率放大器与所述输出开关之间的第二电容器和耦接在所述输出开关与所述地端之间的第二电感器。
  4. 如权利要求1所述的平衡放大器，其特征在于，所述第二支路包括依次连接的第三相移单元、第二功率放大器和第四相移单元。
  5. 如权利要求4所述的平衡放大器，其特征在于，所述第三相移单元包括耦接在所述输入开关与地端之间的第三电感器和耦接在所述输入开关与所述第二功率放大器之间的第三电容器，所述第四相移单元包括耦接在所述第二功率放大器与所述输出单元之间的第四电感器和耦接在所述输出单元与所述地端之间的第四电容器。
  6. 如权利要求1所述的平衡放大器，其特征在于，两个射频信号分别耦接到所述输入开关，所述第一或第二支路放大其中一个射频信号，所述输出开关将放大后的射频信号输出到一个射频天线。
  7. 如权利要求1所述的平衡放大器，其特征在于，两个射频信号分别耦 接到所述输入开关，所述第一和第二支路分别放大其中一个射频信号，所述输出开关分别将放大后的射频信号输出到单独的射频天线。
  8. 一种射频信号的功率放大方法，其特征在于，包括：
    输入至少一个射频信号至少输入开关，通过所述输入开关将所述至少一个射频信号输出到第一或第二支路；
    所述第一和/或第二支路分别用于放大所述至少一个射频信号中的一个；
    通过输出开关分别将放大后的所述至少一个射频信号输出到至少一个射频天线。
  9. 如权利要求8所述的射频信号的功率放大方法，其特征在于，所述至少一个射频信号中的一个射频信号以二分之一功率输入到所述第一支路，所述第一支路依次将该射频信号相移45°，放大n倍，再相移-45°。
  10. 如权利要求8所述的射频信号的功率放大方法，其特征在于，所述至少一个射频信号中的一个射频信号以二分之一功率输入到所述第二支路，所述第一支路依次将该射频信号相移-45°，放大n倍，再相移45°。
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