W波段行波管功率提升研究

Study on Power Enhancement of W-Band Traveling-Wave Tubes

行波管为发射机提供放大信号,其输出功率直接决定着系统的作用距离,是系统的核心部件之一。本文从提升电子效率和电子注功率两方面开展研究,以提升W波段行波管输出功率。基于折叠波导互用电路相速跳变设计,研制出8 GHz带宽内输出功率大于250 W的W波段行波管。提出非半圆弯曲折叠波导与相速跳变技术结合的设计方法,使W波段行波管输出功率和电子效率最高分别达到647 W和13.4%。提出一种四端口式高频结构和一种双弧弯曲折叠波导慢波结构,大幅提升了行波管对工作电流的聚焦能力,基于两种新型结构的创新研究,完成了千瓦级W波段行波管设计。

As one core component of a transmitter,traveling-wave tube(TWT)provides amplified signal for the system and the output power of TWT directly determines the working distance of the system.In order to improve the output power of W-band TWTs,studies are carried out on improving electron efficiency and electron beam power.According to the design of phase velocity step-tapering interaction circuit,a W-band TWT with output power greater than 250 W in 8 GHz bandwidth is developed.A design method of combining non semicircular bending folded waveguide(FWG)with phase velocity tapering is proposed,which makes the maximum output power and electronic efficiency of the W-band TWT reaching 647 W and 13.4%,respectively.A four-port high-frequency structure and a bidirectional bending FWG slow wave structure are proposed,which greatly improve the focusing ability of TWT on working current.Based on innovative research of the two new structures,a kilowatt-class W-band TWT is designed.