【摘要】 <正> 本文介绍一支新研制的X波段、降压收集极、栅控脉冲功率行波管。该管采用大电流密度钪酸盐阴极和小型化钐钴PPM聚集。利用切断慢波线缩短了管长、提高了增益。采用新型散热措施,在3％的工作比下,输出功率达到千瓦级。用单栅,栅丝直径为0.025mm,其电流截获率约为10％。采用单级降压收集极,降压度>40％。电子注动态流通率约为95％,图1为降压收集极的实验曲线。试验管用的是活动收集极,其轴向位置可更多还原

【Abstract】 A grid control pulsed TWT with depressed collector and PPM focusing system is reported in this paper. It operates at X-band and delivers peak output power of 1 kW with saturation gain of 47 dB. The duty cycle is 3%. The electron beam transmission is 95% with RF output at saturated condition. The efficiency is not less than 30% (excluding the heater power).更多还原