一种油介质开关振荡器研究  

Investigation of a switched oscillator filled with oil

作　　者：王俞卫[1] 陈冬群[1] 张建德[1] 宋恒[1] 李达[1] 吕彦奎[1] 刘车波[1] 

机构地区：[1]国防科学技术大学光电科学与工程学院,长沙410073

出　　处：《强激光与粒子束》2016年第5期60-65,共6页High Power Laser and Particle Beams

基　　金：国家高技术发展计划项目

摘　　要：为了产生较高中心频率宽带高功率微波,对一种填充变压器油作为绝缘介质的1/4波长开关振荡器进行了研究。首先对这种开关振荡器特性阻抗分布进行了分析;然后利用静态电场仿真结果和变压器油击穿实验数据,分析了该振荡器的耐压能力;在此基础上,利用CST软件对其瞬态工作特性进行了仿真,考察了开关间隙击穿位置和间隙电压下降时间对产生阻尼正弦信号的峰值和频率的影响;最后介绍了该振荡器以一种方向系数为3的短螺旋天线作为辐射天线的实验测试结果,结果表明,该开关振荡器充电电压上升时间为15ns时,耐压达到-322kV,产生宽带高功率微波中心频率约360 MHz,3dB带宽约22%,辐射因子170kV。To generate wideband high power microwave with relatively high central frequency,aquarter wave switched oscillator filled with transformer oil as insulating medium is investigated in this paper.Firstly,the structure of this oscillator is introduced.Secondly its characteristic impedance is calculated.Thirdly,the voltage capability is estimated by the simulation results of static electric field distribution and experimental data of the breakdown electric field of the transformer oil.And then the transient performance of the oscillator is simulated by utilizing CST software.The influence of the breakdown position and down-time of the voltage between the switch gap on the peak voltage and central frequency is also investigated.Finally,the experimental result of the oscillator connected to a short helical antenna with a directivity of 3is introduced.It is shown that the breakdown voltage of the oscillator reaches-322 kV when the rise time of the charging voltage is about 15 ns.The center frequency of the radiated electric field is about 360 MHz with a 3dB bandwidth of about 22%,while the radiation factor is about 170 kV.

关 键 词：竞带高功率微波 阻尼正弦脉冲 开关振荡器 变压器油 

分 类 号：TN752.5[电子电信—电路与系统]