Experimental analysis of wide-spectrum pulse with no matching transmission line
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摘要: 介绍了基于短路开关-锐化开关组合的非匹配传输线的工作原理，通过数值模拟分析了开关的导通时间、导通延时以及形成线的长度对输出宽谱振荡脉冲的影响。设计了非匹配传输线的实验装置并在500 kV Marx发生器上开展了实验研究。在短路开关间距为4 mm、腔体内充入SF6气体的压力为1.15 MPa，锐化开关间距为2.5 mm、腔体内SF6气体的压力为1.0 MPa的条件下，在50 传输线上测得的峰值功率为3.3 GW，振荡脉冲的中心频率为169 MHz，百分比带宽为22.9%。Abstract: This paper presents a high power no matching transmission line based on chopping-peaking switch,and studies its operating principles. The effects of the switch break-over time, the switch break-over time-delay and the length of the no matching transmission line on the result of output wide-spectrum pulse are analyzed. A high power no matching transmission line is designed accordingly and high voltage experiments are conducted on the 500 kV Marx generation. The no matching transmission line can output wide-spectrum pulse with a peak power of 3.3 GW, a center frequency of 169 MHz, a band width of 22.9% when the chopping switch space is 4 mm with 1.15 MPa SF6 and the peaking switch space is 2.5 mm with 1.0 MPa SF6.
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