一种用于毫米波行波管的微带预失真电路

发布时间：2018-04-11 21:19

本文选题：行波管 + 肖特基二极管　；参考：《电子与信息学报》2017年02期

【摘要】：随着通信技术的发展,行波管预失真电路的研究变得越来越重要。该文针对基于肖特基二极管的非线性发生器,首次分析了二极管SPICE(Simulation Program with Integrated Circuit Emphasis)模型参数中零偏压结电容和串联电阻对预失真扩张曲线的影响。对目前的微带预失真电路工作在K波段以下,绝对或相对带宽一般不超过1.8 GHz和4%,需在输入及输出端加隔离器等不足,基于ADS(Advanced Design System)软件设计并加工了一种用于中心频率30 GHz,绝对和相对带宽为2 GHz和6.67%的毫米波行波管的微带预失真电路。分别测试行波管和级联线性化器后的行波管,29 GHz,30 GHz和31 GHz的增益和相位压缩量分别可以从7.5 d B和40?,7.3 d B和50?,7.1 d B和59?改善到3.8 d B和10?,3.7 d B和12?,2.4 d B和15?以内。双音测试结果表明,为了达到通信中载波与三阶交叉调制分量抑制比(C/IM3)25 d Bc的要求,单独行波管在29 GHz,30 GHz和31 GHz时需分别回退17 d B,18 d B和18 d B,而加入线性化器后的行波管,只需分别回退12 d B,9 d B和8 d B,也即加线性化器可改善5 d B,9 d B和10 d B,极大地提升了行波管的线性度,具有重要工程应用价值。
[Abstract]:With the development of communication technology, the research of TWT predistortion circuit becomes more and more important.For the nonlinear generator based on Schottky diode, the effects of zero-bias junction capacitance and series resistor on the predistortion expansion curve in the SPICE(Simulation Program with Integrated Circuit model parameters are analyzed for the first time in this paper.For the current microstrip predistortion circuits operating below the K band, the absolute or relative bandwidth generally does not exceed 1. 8 GHz and 4%, so the input and output terminals need isolators, etc.Based on ADS(Advanced Design system software, a microstrip predistortion circuit for millimeter-wave TWT with 30 GHz center frequency, 2 GHz absolute and relative bandwidth and 6.67% bandwidth is designed and fabricated.The gain and phase squeezing of TWT 29 GHz 30 GHz and 31 GHz after TWT and Cascade linearizer can be measured from 7.5 dB and 40 7. 3 dB and 50 ~ 7. 1 dB and 59? 9 dB, respectively.Improved to 3.8 dB and 10 + 3.7 dB and 12C 2.4 dB and 15?Within.The results of dual-tone test show that in order to meet the requirement of C / M _ (3) C / M _ (3) C ~ (25) DC for carrier and third-order cross-modulation component suppression in communication, the traveling wave tube (TWT) with a linearizer has to go back 17 dB (18 dB) and 18 dB (18 dB) at 30 GHz and 31 GHz, respectively, and the linearizer is added to the traveling-wave tube.Only 12 dB 9 dB and 8 dB retrogression are needed, that is, the linearizer can improve the linearity of TWT 9 dB and 10 dB respectively, which is of great value in engineering application.
【作者单位】：中国科学院电子学研究所;中国科学院大学;
【基金】：国家科技重大专项(2012ZX01007004001) 国家自然科学基金(61401427)~~
【分类号】：TN124

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