WO2014023234A1 - 一种射频功放装置以及一种射频功率放大方法 - Google Patents

一种射频功放装置以及一种射频功率放大方法 Download PDF

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Publication number
WO2014023234A1
WO2014023234A1 PCT/CN2013/081012 CN2013081012W WO2014023234A1 WO 2014023234 A1 WO2014023234 A1 WO 2014023234A1 CN 2013081012 W CN2013081012 W CN 2013081012W WO 2014023234 A1 WO2014023234 A1 WO 2014023234A1
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power
doherty
signal
phase shifter
power amplifier
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PCT/CN2013/081012
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English (en)
French (fr)
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陈化璋
王刚
崔晓俊
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中兴通讯股份有限公司
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Publication of WO2014023234A1 publication Critical patent/WO2014023234A1/zh

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    • HELECTRICITY
    • H03ELECTRONIC CIRCUITRY
    • H03FAMPLIFIERS
    • H03F1/00Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
    • H03F1/02Modifications of amplifiers to raise the efficiency, e.g. gliding Class A stages, use of an auxiliary oscillation
    • H03F1/0205Modifications of amplifiers to raise the efficiency, e.g. gliding Class A stages, use of an auxiliary oscillation in transistor amplifiers
    • H03F1/0288Modifications of amplifiers to raise the efficiency, e.g. gliding Class A stages, use of an auxiliary oscillation in transistor amplifiers using a main and one or several auxiliary peaking amplifiers whereby the load is connected to the main amplifier using an impedance inverter, e.g. Doherty amplifiers
    • HELECTRICITY
    • H03ELECTRONIC CIRCUITRY
    • H03FAMPLIFIERS
    • H03F3/00Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
    • H03F3/189High-frequency amplifiers, e.g. radio frequency amplifiers
    • HELECTRICITY
    • H03ELECTRONIC CIRCUITRY
    • H03FAMPLIFIERS
    • H03F3/00Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
    • H03F3/20Power amplifiers, e.g. Class B amplifiers, Class C amplifiers
    • H03F3/21Power amplifiers, e.g. Class B amplifiers, Class C amplifiers with semiconductor devices only
    • H03F3/211Power amplifiers, e.g. Class B amplifiers, Class C amplifiers with semiconductor devices only using a combination of several amplifiers
    • HELECTRICITY
    • H03ELECTRONIC CIRCUITRY
    • H03FAMPLIFIERS
    • H03F3/00Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
    • H03F3/20Power amplifiers, e.g. Class B amplifiers, Class C amplifiers
    • H03F3/24Power amplifiers, e.g. Class B amplifiers, Class C amplifiers of transmitter output stages
    • H03F3/245Power amplifiers, e.g. Class B amplifiers, Class C amplifiers of transmitter output stages with semiconductor devices only
    • HELECTRICITY
    • H03ELECTRONIC CIRCUITRY
    • H03FAMPLIFIERS
    • H03F2200/00Indexing scheme relating to amplifiers
    • H03F2200/411Indexing scheme relating to amplifiers the output amplifying stage of an amplifier comprising two power stages

Definitions

  • the present invention relates to the field of circuit design technology, and in particular, to an RF power amplifier device and a radio frequency power amplification method.
  • the technical problem to be solved by the embodiments of the present invention is to provide an RF power amplifier device and a radio frequency power amplification method, which solve the problem that a single Doherty power amplifier cannot meet the performance requirements of the power amplifier.
  • an embodiment of the present invention provides an RF power amplifier device, where the device includes N parallel power branches; each power branch includes a phase shifter and a Doherty power amplifier; wherein N is greater than An integer of 1; the phase shifter is set to perform signal phase compensation.
  • each of the power devices in the above apparatus further includes a driver:
  • the output of the phase shifter is coupled to the input of the driver, and the output of the driver is coupled to the output of the Doherty power amplifier.
  • the phase shifter is a chip device or an analog circuit device.
  • the foregoing apparatus further includes a power distribution module and a power synthesis module; An input of the N parallel power branches is connected to an output of the power distribution device; an output of the N parallel power branches is connected to an input of the power synthesis module.
  • an embodiment of the present invention further provides a radio frequency power amplification method, including: distributing a signal to N parallel power branches, using a phase shifter for signal phase compensation on each power branch The Doherty power amplifier performs signal amplification, where N is an integer greater than one.
  • the step of performing signal amplification by using a phase shifter on each power branch after signal phase compensation by using a Doherty power amplifier includes:
  • phase compensation is performed by the phase shifter and then input to the driver, and the output signal of the driver is input to the Doherty power amplifier.
  • the phase shifter is a chip device or an analog circuit device.
  • the signal is allocated to the N parallel power branch fingers: the input signal is distributed to the N parallel power branches by the power distribution device, and the N parallel connections are performed by the power synthesis module.
  • the power amplification signal of the power branch is synthesized.
  • This scheme performs two or more doherty power amplifier synthesis, and adjusts the synthetic doherty power amplifier.
  • the phase shifter is introduced to phase compensate the signal to improve the power amplification efficiency and ensure the efficiency and linearity.
  • the debugging is more convenient and easy, and the uniform performance of the device is better, the operation is more stable and reliable, and the solution can also meet the new requirements of the user, such as higher power and larger peak-to-average ratio.
  • 1 is a structural diagram of a Doherty power amplifier in the related art
  • FIG. 2 is a structural diagram of an RF power amplifier device in an embodiment
  • Fig. 3 is a structural diagram of another RF power amplifier device in the embodiment.
  • Preferred embodiment of the invention Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be noted that, in the case of no conflict, the features in the embodiments and the embodiments in the present application may be arbitrarily combined with each other.
  • the RF power amplifier device includes N (N is an integer greater than 1, such as N is 2 or 3 or 4) parallel power branches, each of which includes a phase shifter and a Doherty power amplifier.
  • the phase shifter is configured to perform signal phase compensation.
  • each power branch may further include a driver, and the output end of the phase shifter is connected to the input end of the driver, and the output end of the driver is connected to the output end of the Doherty power amplifier.
  • the device may further include a power distribution module and a power synthesis module; an input end of the N parallel power branches is connected to an output end of the power distribution device; and an output terminal of the N parallel power branches is connected The input of the power synthesis module.
  • the phase shifter is a chip device or an analog circuit device.
  • the method for amplifying a radio frequency power corresponding to the above device comprises: distributing a signal to N (N is an integer greater than 1, such as N is 2 or 3 or 4) parallel power branches, using a phase shifter on each power branch The signal phase is compensated and the signal is amplified by a Doherty power amplifier.
  • the step of performing signal amplification by the Doherty power amplifier after using the phase shifter for signal phase compensation on each power branch may specifically include: performing signal phase compensation and inputting through the phase shifter in each power branch To the driver, input the output signal of the driver to the Doherty power amplifier.
  • the phase shifter is a chip device or an analog circuit device.
  • the assignment of signals to N parallel power branches means: by means of a power distribution device The input signal is distributed to the N parallel power branches, and the power amplification signals of the N parallel power branches are synthesized and output through a power synthesis module.
  • this scheme introduces phase shifter technology in the synthesized doherty circuit to adapt to higher top power, while ensuring efficiency, linearity and other indicators.
  • This technology makes debugging easier and consistent performance. Ok, the operation is more stable and reliable.
  • This scheme performs two or more doherty power amplifier synthesis, and adjusts the synthetic doherty power amplifier.
  • the phase shifter is introduced to phase compensate the signal to improve the power amplification efficiency and ensure the efficiency and linearity.
  • the debugging is more convenient and easy, and the uniform performance of the device is better, the operation is more stable and reliable, and the solution can also meet the new requirements of the user, such as higher power and larger peak-to-average ratio.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Amplifiers (AREA)

Abstract

一种射频功放装置以及一种射频功率放大方法,射频功放装置包括N个并联的功率支路;每个功率支路包括移相器和多赫蒂功率放大器;其中N为大于1的整数。所述移相器,设置为进行信号相位补偿。本方案进行两个甚至两个以上doherty功放合成,并对合成doherty功放进行相位调整,在合成doherty电路中引入移相器对信号进行相位补偿,提高功率放大效率的同时,保证效率、线性等指标,同时使调试更加方便和容易,并且使装置的一致性能更好,运行更稳定可靠,本方案还可以满足用户的新需求,例如更高的功率和更大峰均比等需求。

Description

一种射频功放装置以及一种射频功率放大方法
技术领域
本发明涉及电路设计技术领域 ,尤其涉及一种射频功放装置以及一种射 频功率放大方法。
背景技术
面对日益激烈的通信市场竟争, 基站产品的效率高低已经成为业内竟争 的焦点, 功放产品作为基站中的主要部件, 其效率提升也成了重中之重, 各 厂家都在研究功放效率的提升方案, 多赫蒂(Doherty )功放技术是一项成熟 的功放技术, 图 1为相应的模块组成结构。 各厂商都已在批量生产该功放, 并且各厂商依然在探索 Doherty技术, 使该技术更容易调试, 一致性更好, 性能更稳定可靠。
随着基站产品的竟争越来越激烈, 客户提出来许多新的需求, 比如峰均 比进一步增大、 机顶功率的进一步提升等, 目前单个 Doherty功放不能满足 此类需求。 发明内容
本发明实施例要解决的技术问题是提供一种射频功放装置以及一种射频 功率放大方法, 解决单个 Doherty功放不能满足功放性能要求的问题。
为了解决上述技术问题, 本发明实施例提供了一种射频功放装置, 所述 装置包括 N个并联的功率支路; 每个功率支路包括移相器和多赫蒂功率放大 器; 其中 N为大于 1的整数; 所述移相器, 设置为进行信号相位补偿。
可选地, 上述装置中的每个功率支路还包括驱动器:
每个功率支路中, 所述移相器的输出端连接驱动器的输入端, 所述驱动 器的输出端连接多赫蒂功率放大器的输出端。
可选地, 上述装置中, 所述移相器是芯片装置或者模拟电路装置。
可选地, 上述装置还包括功率分配模块和功率合成模块; 所述 N个并联的功率支路的输入端连接所述功率分配装置的输出端; 所述 N个并联的功率支路的输出端连接所述功率合成模块的输入端。 为了解决上述技术问题,本发明实施例还提供了一种射频功率放大方法, 包括: 将信号分配到 N个并联的功率支路上, 在每个功率支路上使用移相器 进行信号相位补偿后通过多赫蒂功率放大器进行信号放大, 其中 N为大于 1 的整数。
可选地, 上述方法中, 在每个功率支路上使用移相器进行信号相位补偿 后通过多赫蒂功率放大器进行信号放大的步骤包括:
每个功率支路中, 通过移相器进行信号相位补偿后输入至驱动器, 将驱 动器的输出信号输入至多赫蒂功率放大器。
可选地, 上述方法中:
所述移相器是芯片装置或者模拟电路装置。
可选地, 上述方法中, 将信号分配到 N个并联的功率支路上指: 通过功率分配装置将输入信号分配到所述 N个并联的功率支路, 通过功 率合成模块将所述 N个并联的功率支路的功率放大信号进行合成输出。
本方案进行两个甚至两个以上 doherty功放合成, 并对合成 doherty功放 进行调整, 在合成 doherty电路中引入移相器对信号进行相位补偿, 提高功率 放大效率的同时, 保证效率、 线性等指标, 同时使调试更加方便和容易, 并 且使装置的一致性能更好, 运行更稳定可靠, 本方案还可以满足用户的新需 求, 例如更高的功率和更大峰均比等需求。 附图概述
图 1是相关技术中 Doherty功率放大器的结构图;
图 2是实施例中射频功放装置的结构图;
图 3是实施例中另一种射频功放装置的结构图。 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。
图 1中调整 doherty的相位时,需要调整偏置 1和偏置 2两条微带线来调 整 doherty的相位, 此种方法要通过割线、 补线等操作来实现, 调试不方便, 且一致性较差。 本方案中引入了移相器, 在每路的 doherty电路中, 釆用移相 器, 通过移相器方便的补偿每路 doherty之间的相位, 使功率合成时相位对的 更方便、 更准, 更方便的兼顾效率与线性。
如图 2所示, 射频功放装置包括 N个(N为大于 1的整数, 例如 N为 2 或 3或 4 )并联的功率支路, 每个功率支路包括移相器和多赫蒂功率放大器, 所述移相器设置为进行信号相位补偿。
如图 3所示, 具体电路中,每个功率支路中还可以包括驱动器(driver ) , 移相器的输出端连接驱动器的输入端, 驱动器的输出端连接多赫蒂功率放大 器的输出端。
所述装置还可以包括功率分配模块和功率合成模块; 所述 N个并联的功 率支路的输入端连接所述功率分配装置的输出端; 所述 N个并联的功率支路 的输出端连接所述功率合成模块的输入端。
所述移相器是芯片装置或者模拟电路装置。
与上述装置对应的射频功率放大方法包括: 将信号分配到 N个(N为大 于 1的整数, 例如 N为 2或 3或 4 )并联的功率支路上, 在每个功率支路上 使用移相器进行信号相位补偿后通过多赫蒂功率放大器进行信号放大。
其中, 在每个功率支路上使用移相器进行信号相位补偿后通过多赫蒂功 率放大器进行信号放大的步骤具体可以包括: 在每个功率支路中, 通过移相 器进行信号相位补偿后输入至驱动器, 将驱动器的输出信号输入至多赫蒂功 率放大器。
所述移相器是芯片装置或者模拟电路装置。
另外, 将信号分配到 N个并联的功率支路上则指: 通过功率分配装置将 输入信号分配到所述 N个并联的功率支路,通过功率合成模块将所述 N个并 联的功率支路的功率放大信号进行合成输出。
综上所述, 本方案通过在合成的 doherty电路中, 引入移相器技术, 以适 应更高的机顶功率, 同时保证效率、 线性等指标, 釆用本技术使调试更容易, 一致性能更好, 运行更稳定可靠。
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申请的技术方案而非限制, 仅仅参照较佳实施 例对本申请进行了详细说明。 本领域的普通技术人员应当理解, 可以对本申 请的技术方案进行修改或者等同替换, 而不脱离本申请技术方案的精神和范 围, 均应涵盖在本申请的权利要求范围当中。
工业实用性
本方案进行两个甚至两个以上 doherty功放合成, 并对合成 doherty功放 进行调整, 在合成 doherty电路中引入移相器对信号进行相位补偿, 提高功率 放大效率的同时, 保证效率、 线性等指标, 同时使调试更加方便和容易, 并 且使装置的一致性能更好, 运行更稳定可靠, 本方案还可以满足用户的新需 求, 例如更高的功率和更大峰均比等需求。

Claims

权 利 要 求 书
1、 一种射频功放装置,
包括 N个并联的功率支路; 每个功率支路包括移相器和多赫蒂功率放大 器; 其中 N为大于 1的整数;
所述移相器, 设置为进行信号相位补偿。
2、 如权利要求 1所述的装置, 所述装置的每个功率支路还包括驱动器; 每个功率支路中, 所述移相器的输出端连接所述驱动器的输入端, 所述 驱动器的输出端连接多赫蒂功率放大器的输出端。
3、 如权利要求 1或 2所述的装置, 其中,
所述移相器是芯片装置或者模拟电路装置。
4、 如权利要求 1或 2所述的装置,
所述装置还包括功率分配模块和功率合成模块;
所述 N个并联的功率支路的输入端连接所述功率分配装置的输出端; 所述 N个并联的功率支路的输出端连接所述功率合成模块的输入端。
5、 一种射频功率放大方法, 包括,
将信号分配到 N个并联的功率支路上, 在每个功率支路上使用移相器进 行信号相位补偿后通过多赫蒂功率放大器进行信号放大, 其中 N为大于 1的 整数。
6、 如权利要求 5所述的方法, 其中, 在每个功率支路上使用移相器进行 信号相位补偿后通过多赫蒂功率放大器进行信号放大的步骤包括:
每个功率支路中, 通过移相器进行信号相位补偿后输入至驱动器, 将驱 动器的输出信号输入至多赫蒂功率放大器。
7、 如权利要求 5或 6所述的方法, 其中,
所述移相器是芯片装置或者模拟电路装置。
8、如权利要求 5或 6所述的方法, 其中, 将信号分配到 N个并联的功率 支路上指:
通过功率分配装置将输入信号分配到所述 N个并联的功率支路, 通过功 率合成模块将所述 N个并联的功率支路的功率放大信号进行合成输出。
PCT/CN2013/081012 2012-08-10 2013-08-07 一种射频功放装置以及一种射频功率放大方法 WO2014023234A1 (zh)

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