电容加载平板传输线型PFN理论与实验研究
Theoretical and experimental study of PFN based on capacitor-loaded plate transmission line
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摘要: 介绍了一种电容加载双导体平板传输线型PFN，分析了PFN的波传播特性，提出通过减小加载电容间距提高PFN上限截止频率、减小阻抗色散的方法；采用损耗线模型分析了串联PFN的端部反射系数，研究了减小反射系数的方法；分析了串联PFN的磁耦合问题，从理论和实验两方面研究了PFN几何参数和排布方式对电流脉冲的影响。基于串联PFN和Tesla变压器技术，研制成功一台长脉冲功率源，输出电压脉冲幅度超过300 kV，脉冲宽度110 ns，前沿小于10 ns，功率超过2 GW。Abstract: A capacitor-loaded parallel plate transmission line model was introduced and its propagating characteristic was analyzed. The loaded capacitor’s distance was decreased to increase the upper limit of PFN’s cutoff frequency and to decrease the impedance dispersion. With the loss-line model, the reflection coefficient at PFN’s end was analyzed and the method to minimize this coefficient was researched. The magnetic coupling for series PFN was also researched and the influences of PFN’s parameters and their arrangement mode on pulse current were analyzed. Based on the technologies of series PFN and Tesla transformer, a 2 GW long-pulse generator was developed, with 300 kV output voltage, 110 ns pulse width and less than 10 ns rise time．
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Key words:
- pulse forming net /
- tesla transformer /
- long pulse /
- capacitor-loaded transmission line
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