一种四级传输线脉冲变压器的初步研究

Preliminary study of a 4-stage transmission line transformer

分析了四级传输线脉冲变压器的电路结构,采用等效电路方法简化了电路,推导了输出电压波形的表达式。开展了冷测实验,结果显示传输变压器变压比约为4,变压器上升时间约为48 ns。采用实验所测参数,利用PSPICE软件对全电路进行了数值模拟。结果表明:模拟和冷测结果基本一致。将各元件参数代入波形表达式,结果表明:传输变压器上升时间计算值为12 ns,与实验值(48 ns)有一定差距;而传输变压器变压比计算值为3.98,与实验结果基本吻合。

The circuit diagram of a 4-stage voltage transmission line transformer（TLT） is analyzed. The circuit is simplified by means of equivalent circuit, and the expression of the output waveform is derived. The low voltage test of the 4-stage TLT is developed, the result of which indicates the voltage ratio is about 4 and rise time 48 ns. The result of simulation with PSPICE is in good agreement with the test. With the same parameters, theoretical calculation of output voltage amplitude is 3.98 which corresponded to measured value 4. However, there is some discrepancy between calculated value of TLT＇s rise time （12 ns） and measured value （48 ns）.