耳型折叠波导慢波结构W波段行波管

毫米波行波管具有大功率、宽频带、高增益等特点，广泛用于雷达、高速通信、电子对抗等现代军事装备中。为提高折叠波导耦合阻抗并考虑工程应用性，提出一种耳型折叠波导新型慢波结构。与常规矩形波导相比，工作频带内耦合阻抗提高30%以上，损耗降低10%。研制的耳型折叠波导W波段行波管，在工作电压21.9 kV，电流210 mA，占空比为5%时，10.8 GHz带宽内输出功率大于192 W，峰值功率达278 W，电子效率和增益分别达到6.3%和44.6 dB，行波管工作稳定。

A W-band Traveling Wave Tube with ear-Folded Waveguide slow-wave structure

Millimeter-wave Traveling Wave Tubes(TWTs) have the characteristics of high power, broad band and high gain, and are widely used in modern military electronic equipment, such as radar, high-speed communication and electronic countermeasures, etc. In order to improve the coupling impedance of the Folded Waveguide(FWG) and the engineering applicability, a novel type of ear-FWG is proposed, which increases the coupling impedance in the working frequency band by more than 30% and reduces the loss by 10% compared with the conventional rectangular waveguide. When the ear-FWG W-band TWT operates at 21.9 kV and 210 mA, and the duty cycle is 5%, the output power in the 10.8 GHz bandwidth is higher than 192 W, the peak power reaches 278 W, the electron efficiency and gain reach 6.3% and 44.6 dB, respectively, and the TWT works stably.