空间电子技术2026，Vol.23Issue(2)：46-53,8.DOI:10.3969/j.issn.1674-7135.2026.02.007
某星载S频段线性化行波管放大器输出功率下降问题研究
Research on the output power decline problem of a spaceborne S-band linearized traveling wave tube amplifier
摘要
Abstract
The spaceborne traveling wave tube amplifier is a key unit of the satellite payload subsystem,and its performance stability directly affects the reliability and service life of the satellite communication link.This paper conducts a comprehensive fault diagnosis and mechanism study on the abnormal phenomenon that the output power of one S-band TWTA dropped by approximately 4 dB during the transponder performance test of a certain satellite in the whole satellite state.Based on fault tree analysis and various ground troubleshooting tests,it was determined that this malfunction was caused by hydrogen poisoning of two low-noise amplifier chips inside microwave modules located in the linearized channel amplifier.After implementing corrective measures to replace the faulty modules with another batch of the same model and specification products with qualified hydrogen content and conducting experimental verification,the S-band TWTA returns to normal operation,which provides suggestions for the design improvement and component selection of subsequent satellite design.This research has significant engineering reference value for ensuring the long-term stable operation of spaceborne TWTA in orbit and enhancing the reliability of satellites.关键词
卫星/行波管放大器/功率下降/故障分析Key words
satellite/traveling wave tube amplifier/power drop/fault analysis分类
信息技术与安全科学引用本文复制引用
王军,禹旭敏,徐磊..某星载S频段线性化行波管放大器输出功率下降问题研究[J].空间电子技术,2026,23(2):46-53,8.基金项目
国家重点实验室基金项目(编号:6142807032302) （编号:6142807032302）
