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Ka波段宽频带行波管放大器线性化研究

韩飞 夏雷 李宝建

韩飞, 夏雷, 李宝建. Ka波段宽频带行波管放大器线性化研究[J]. 强激光与粒子束. doi: 10.11884/HPLPB202133.200353
引用本文: 韩飞, 夏雷, 李宝建. Ka波段宽频带行波管放大器线性化研究[J]. 强激光与粒子束. doi: 10.11884/HPLPB202133.200353
Han Fei, Xia Lei, Li Baojian. Study on linearization of Ka-band wideband traveling-wave tube amplifer[J]. High Power Laser and Particle Beams. doi: 10.11884/HPLPB202133.200353
Citation: Han Fei, Xia Lei, Li Baojian. Study on linearization of Ka-band wideband traveling-wave tube amplifer[J]. High Power Laser and Particle Beams. doi: 10.11884/HPLPB202133.200353

Ka波段宽频带行波管放大器线性化研究

doi: 10.11884/HPLPB202133.200353
基金项目: 预研基金项目(2019-JCJQ-JJ-57X)
详细信息
    作者简介:

    韩飞:韩 飞(1994—),男,硕士研究生,工程师,主要从事行波管线性化理论与技术研究;741914151@qq.com

  • 中图分类号: TN402

Study on linearization of Ka-band wideband traveling-wave tube amplifer

  • 摘要: 线性化器是毫米波通信系统中的关键器件,在改善放大器的线性指标及提高通信质量等方面起着至关重要的作用。现阶段国内行波管放大器(TWTA)线性化技术尚不完善,无法满足通信技术发展的应用需求,因此线性化技术的研究刻不容缓。本文提出了一种新的宽频带模拟预失真线性化器结构,用来改善Ka波段TWTA的非线性特性。仿真结果表明,在26~30 GHz频率范围内,输入功率为−20~10 dBm,线性化器的增益扩张≥5.08 dB,相位扩张≥64.81 °。将线性化器与TWTA进行级联测试,中心频率的增益压缩≤3.12 dB,相位压缩≤2.31 °,三阶互调(IMD3)显著提高。
  • 图  1  模拟预失真技术原理图

    Figure  1.  Schematic diagram of simulated pre-distortion technique

    图  2  反射式电路原理图

    Figure  2.  Schematic diagram of reflection circuit

    图  3  二分支电桥结构仿真结果

    Figure  3.  Simulation results of two-branch bridge structure

    图  4  三分支电桥结构仿真结果

    Figure  4.  Simulation results of three-branch bridge structure

    图  5  四分支电桥结构仿真模型

    Figure  5.  Simulation model of four-branch bridge structure

    图  6  四分支电桥结构仿真结果

    Figure  6.  Simulation results of four-branch bridge structure

    图  7  预失真结构仿真模型

    Figure  7.  Simulation model of the pre-distorted structure

    图  8  ADS仿真结构图

    Figure  8.  ADS simulation structure diagram

    图  9  预失真电路非线性特性

    Figure  9.  Nonlinear characteristics of pre-distortion circuits

    图  10  线性化器实物图

    Figure  10.  A picture of the linearizer

    图  11  预失真电路测试图

    Figure  11.  Test diagram of pre-distortion circuits

    表  1  电桥的仿真数据

    Table  1.   Simulation data of the bridge

    f/GHzS(3,1)/dBS(4,1)/dBS(1,1)/dBS(2,1)/dBS(3,4)/dB
    two-branch bridgethree-branch bridgefour-branch bridgetwo-branch bridgethree-branch bridgefour-branch bridgetwo-branch bridgethree-branch bridgefour-branch bridgetwo-branch bridgethree-branch bridgefour-branch bridgetwo-branch bridgethree-branch bridgefour-branch bridge
    26 −2.97 −3.63 −3.31 −3.51 −2.68 −3.02 −19.32 −33.79 −24.42 −16.17 −21.46 −18.88 −18.46 −32.36 −19.59
    28 −2.42 −3.23 −3.18 −3.85 −2.99 −3.15 −48.48 −33.38 −28.18 −27.92 −26.41 −17.81 −44.82 −31.55 −24.14
    30 −2.32 −3.03 −3.31 −4.17 −3.26 −3.07 −20.20 −21.40 −21.27 −22.19 −26.73 −18.47 −19.25 −21.00 −26.81
    下载: 导出CSV

    表  2  增益压缩测试数据

    Table  2.   Test data of the gain compression

    IPBO/dBgain compression of TWTA/dBgain compression of linearized TWTA/dB
    0−5.81−3.12
    3−3.31−1.06
    6−1.77−0.36
    9−0.92−0.18
    13−0.34−0.10
    15−0.19−0.07
    下载: 导出CSV

    表  3  相位压缩测试数据

    Table  3.   Test data of the phase compression

    IPBO/dBphase compression of TWTA/(°)phase compression of linearized TWTA/(°)
    0−33.31−0.81
    3−23.88+1.6
    6−14.77+2.31
    9−8.39+1.52
    13−3.5+0.79
    15−2.03+0.42
    下载: 导出CSV

    表  4  IMD3测试数据

    Table  4.   Test data of IMD3

    IPBO/dBIMD3 of TWTA/dBIMD3 of linearized TWTA/dB
    3−10.75−12.30
    4−11.74−14.39
    6−13.94−20.08
    9−17.97−32.36
    13−24.11−35.12
    下载: 导出CSV
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出版历程
  • 收稿日期:  2020-12-28
  • 修回日期:  2021-03-04
  • 网络出版日期:  2021-03-17

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