Ka 波段宽频带行波管放大器线性化研究  

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

作　　者：韩飞 夏雷[2] 李宝建 Han Fei;Xia Lei;Li Baojian(The Twelfth Institute of China Electronics Technology Group Corporation,Beijing 100015,China;School of Electronic Science and Engineering,University of Electronic Science and Technology of China,Chengdu 611731,China)

机构地区：[1]中国电子科技集团公司第十二研究所,北京100015 [2]电子科技大学电子科学与工程学院,成都611731

出　　处：《强激光与粒子束》2021年第4期29-34,共6页High Power Laser and Particle Beams

基　　金：预研基金项目(2019-JCJQ-JJ-57X)。

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。Linearizer is a key component in the millimeter-wave communication system,it plays an important role in improving the linearity performance of amplifier and communication quality.At present,the development of traveling-wave tube amplifier(TWTA)linearization technology cannot meet the application requirements of communication technology,therefore,the research of linearization technology is very important.In this paper we propose a kind of a new wide-band analog pre-distortion structure used to improve the nonlinear characteristics of Kaband TWTA.The simulation results show that when the input power changes from−20 to 10 dBm in the frequency range of 26−30 GHz,the gain expansion of the linearizer is greater than 5.08 dB,and the phase expansion exceeds 64.81°.The linearizer and the TWTA are cascaeded for testing.The test results show that the gain compression and phase compression of center frequence is less than 3.12 dB and 2.31°respectively,and the third-order intermodulation(IMD3)improves significantly.

关 键 词：线性化 毫米波 宽频带 模拟预失真 行波管放大器 

分 类 号：TN402[电子电信—微电子学与固体电子学]