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高功率脉冲功率调制器的紧凑化是其重要研究方向,为此将螺旋线与折叠线技术相结合,设计了一种长脉冲折叠型同轴螺旋脉冲调制器,该调制器将两根螺旋型脉冲形成线通过过渡段部分连接,形成折叠结构,在一定的长度范围内实现了长脉冲的输出,设计指标为:二极管电压400 kV,负载电流26 kA,脉冲宽度约为260 ns。对传输线的电压波过程进行了分析,结果表明,过渡段阻抗与传输线阻抗匹配时输出波形最好;用PSpice软件对脉冲形成线的充电电压和二极管电压、电流进行了模拟;利用高压同轴电缆,进行了低压情况下的验证实验,实验结果与理论分析、模拟研究结果一致。此种类型的调制器具有运行稳定、体积小、结构紧凑的特点。
The compactness of high-power pulsed power modulator is an important research direction. For this purpose, the helix and folding line technology are combined to design a long pulsed-folded coaxial helical pulse modulator. The modulator combines two helical Pulsed wires are partially connected through the transition section to form a folded structure. Long pulse output is achieved over a certain length. The design specifications are: diode voltage 400 kV, load current 26 kA, pulse width 260 ns. The voltage wave process of the transmission line is analyzed. The results show that the output waveform is the best when the impedance of the transition section is matched with that of the transmission line. The PSpice software is used to simulate the charging voltage of the pulse forming line and the diode voltage and current. , The verification experiment under low pressure was carried out. The experimental results are in good agreement with the theoretical analysis and simulation results. This type of modulator has the characteristics of stable operation, small size and compact structure.