非线性传输线高功率实验

High power experiment of nonlinear transmission lines system

设计了基于交叉耦合铁氧体非线性传输线高功率射频微波产生系统,系统由脉冲形成线、非线性传输线以及高功率匹配负载(或组合振子辐射天线)组成。由100kV高压电源和高压微波电缆构成单传输线高功率脉冲形成线,形成线输出脉冲幅度35kV,脉冲半宽60ns。高压脉冲经过非线性传输线的脉冲压缩和调制,与高功率匹配负载相连时,实验得到了峰峰值31kV、中心频率308 MHz、3dB带宽为13%的射频振荡脉冲;与组合振子天线相连时,实验得到了中心频率380MHz、3dB带宽为12%的宽谱辐射。实验结果与数值模拟基本吻合。

A high power RF pulse formation system was developed based on ferrite magnetic nonlinear transmission lines with cross-linking elements.The system consisted of a pulse forming line,nonlinear transmission lines and a matched high power load or combined dipole antenna.The pulse forming line was based on a 100 kV high power source and a high power microwave coaxial cable.The pulse width of the output waveform of the pulse forming line was 60 ns and the output voltage of pulse was 35 kV.The output high power pulse was fed into nonlinear transmission.The nonlinear transmission lines connected to the matched load produced a RF pulse of 31 kV peak to peak voltage amplitude and with a 308 MHz centre frequency and 13% 3-dB bandwidth.A 380 MHz centre frequency and 12%3-dB bandwidth were obtained when the nonlinear transmission lines were connected to a combined dipole antenna.