| Ku波段星载行波管混合型预失真线性化器的研究 |
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| 引用本文： | 张翔,周东方,张毅,孙昱.Ku波段星载行波管混合型预失真线性化器的研究[J].电子技术应用,2009,35(6). |
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| 作者姓名： | 张翔 周东方 张毅 孙昱 |
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| 作者单位： | 信息工程大学,信息工程学院,河南,郑州,450002 |
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| 摘 要： | 提出了一种改善行波管放大器非线性特性的预失真新方法,采用载波复幂级数法分析了星载行波管的非线性传输特性,提出一种反向复幂级数的预失真线性技术。所提出的预失真器非线性特性由混合型结构实现,包括肖特基二级管、砷化镓场效应管,改善了行波管在Ku波段的幅度-幅度失真特性,线性增益最大增加30dB,对行波管线性化器的后续研究有一定参考和实用价值。
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| 关 键 词： | 行波管放大器 复载波幂级数法 线性化技术 预失真 肖特基二极管 砷化镓场效应管非线性特性 |
Design of Ku-band predistortion linearizer using mixed structure circuit for satellite TWTA |
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| ZHANG Xiang,ZHOU Dong Fang,ZHANG Yi,SUN Yu.Design of Ku-band predistortion linearizer using mixed structure circuit for satellite TWTA[J].Application of Electronic Technique,2009,35(6). |
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| Authors: | ZHANG Xiang ZHOU Dong Fang ZHANG Yi SUN Yu |
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| Abstract: | In this paper, a new predistortion method to improve nonlinearity of a traveling wave tube amplifiers (TWTA) is proposed. Nonlinear transfer characteristics of TWTA are analyzed using the carrier complex power series(CCPS) method. An inverse complex power series of a predistortion linearizer to linearize TWTA is also proposed. The nonlinear distortion characteristics of predistorter can be realized with the mixed structure that is composed of Schottky diode and GaAs FET. The AM-to-AM characteristic of TWTA on Kuband is improved with maximal linear gain of 30 dB by proposed predistortion linearizer.The results provide reference and practical value to a certainty for the design of linearization used on TWTA. |
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| Keywords: | TWTA carrier complex power series(CCPS) linearization predistortion Schottky diode GaAs FET nonlinearity |
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