一种空间行波管用宽脉宽调制器  

A Novel Type of Wide-Pulse Modulator for Space Traveling Wave Tube Applications

作　　者：廖薇[1,2] 陈宇[1] 王小霞[1] 王刚[1] 罗积润[1] 

机构地区：[1]中国科学院电子学研究所高功率微波源与技术重点实验室,北京100190 [2]中国科学院大学,北京100039

出　　处：《真空科学与技术学报》2017年第6期567-573,共7页Chinese Journal of Vacuum Science and Technology

摘　　要：介绍了一种为行波管设计的宽脉宽固态浮动板调制器。利用RC网络实现脉冲延时,防止脉冲重叠;利用单稳态触发器将脉冲信号转换成脉冲串,解决了宽脉宽在隔离脉冲变压器上传输困难的问题;利用MOSFET极间电容充电延时特性,构建脉冲恢复电路,解决了变压器频繁通断电容易导致变压器损坏的问题。最后,完成了本设计电路制作和测试,验证了设计方案的可行性。Here,we addressed the major technical problems in applications of space traveling wave tube （STWT）,including the overlap of pulses,difficulty of wide-pulse transmission and damage of transformercaused by frequent on/off switching.The possible solutionswas a novel type of wide-pulse,solid-state floating-board modulator,comprisingtheRC network,mono-stable triggers and recovery circuit with MOSFETs as switches.To be specific,the RC circuit delays the pulses,effectively preventing pulses from overlapping;the mono-stable triggers convert pulses into pulse-strings,simplyovercomingthe transmission difficulty of wide-pulseon the isolated pulse transformer;and the charge-delay characteristics of the inter-electrode distributed capacitance of MOSFET in the recovery circuit reliably protect the transformer from the damage caused by frequent on/off switching.As shown in the test and simulated results,the prototyped modulator was a total solution of the above mentioned problems.

关 键 词：调制器 宽脉宽 脉冲隔离传输 MOSFET 行波管 

分 类 号：TN832.4[电子电信—信息与通信工程]