两级同轴Blumlein线理论及其模拟分析

利用拉普拉斯变换求解两级同轴Blumlein线对负载的放电过程，得到了纯电阻负载上理想输出电压的解析表达式。分析了开关电感、负载电感及回路电感对负载主脉冲的影响。对PSpice模拟的结果与推测的负载电压表达式进行对比，两者符合得较好。分析结果表明:脉冲的前沿主要是由开关电感决定，而平顶幅值的变化趋势主要是由回路电感决定;开关电感越小，上升沿越小，回路电感越大;脉冲输出电压和能量传输效率越高。

Theoretical and simulation analysis of two-stage coaxial Blumlein line

The analytic expression of the purely resistive load output voltage is derived by using the Laplace transform to solve the process that a two-stage coaxial Blumlein line discharges a resistive load. The influence of switch inductance, resistive load inductance and loop inductance on the resistive load main pulse is analyzed. Comparing the result simulated by PSpice with the suppositional expression of load voltage, we find they fit well. The result indicates that the pulse rising time is mainly determined by switch inductance and the trend of the flat part is mainly determined by loop inductance .The smaller the switch inductance is, the less the rising time is; the larger the loop inductance is, the higher the pulse voltage and the energy efficiency are. The conclusion is significant to the design of two-stage coaxial Blumlein lines.