W波段平面集成行波管高频系统设计及验证

Design and Verification of High-frequency System for a W-band Planar-integrated Travelling Wave Tube

针对W波段平面一维阵列集成行波管设计,采用非半圆弯曲变形折叠波导慢波结构和聚焦极调制皮尔斯电子枪,基于CST、MTSS和Opera软件优化设计了集成行波管高频系统和电子光学系统,实现了W波段低电压小电流工作的低功率行波管设计,通过周期永磁(PPM)聚焦系统制管验证了高频系统和电子枪设计的合理性。测试结果表明,行波管在工作电压12.62 kV,工作电流31.6 mA条件下,输出功率大于10 W的带宽达到5 GHz,增益优于28 dB,总效率优于10%,测试结果与设计结果具有较好一致性,为W波段行波管实现阵列集成提供技术支撑。

A travelling wave tube(TWT)consists of a folded waveguide slow wave structure with modified circulator bends and a Pierce electron gun modulated by focusing electrode is developed for planar-integrated research.The high-frequency system and electronic optical system of the integrated TWT are optimized by CST,MTSS,and Opera software,and the low-power design of TWT with low voltage and low current is achieved.The rationality of the high-frequency system and electron gun design is verified through a prototype tube with periodic permanent magnet(PPM)focusing system.The test results of the TWT show that at a voltage of 12.62kV and a current of 31.6 mA,the bandwidth with an output power over 10 W reaches 5GHz,the gain is over 28dB and the efficiency is over 10%,which is in good agreement with the design.The research provides a technological support for the array integration application of W-band TWTs.