二极管波过程理论分析
Theoretical analysis of diode wave process
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摘要: 理论分析了二极管磁绝缘传输线（MITL）区阻抗不连续和二极管阻抗随时间的变化对波过程的影响。结果表明：若MITL区电长度远小于入射波脉宽，则二极管前端测得的电压电流幅值反映了阴极处电压、电流，电压与电流的比值由二极管阻抗确定；为加快阴极处电压、电流前沿，MITL区各段传输线沿波的传输方向可采用阻抗渐增的方式，且取中间元件的阻抗为其两端元件阻抗的均方根；测点电压、电流前沿在时间上可分为传输、全反射和束流形成阶段；梯形电压波入射下，测点波形前沿全反射阶段电压较传输阶段增长速度倍增，电流为一段平台；实际电压波入射下，测点电压波形前沿为一条不断增长的曲线，电流波形前沿存在振荡。Abstract: Effects of impedance discontinuity in magnetically insulated transmission line(MITL) region and diode time-dependent impedance on diode wave process have been studied through theoretical analysis. If the time delay of the transmission lines in MITL region is much shorter than the pulse width of the incident wave, the amplitudes of cathode voltage and current can be represented by those measured in the anterior part of the diode and the ratio of voltage and current is diode impedance. To steepen the leading edge of cathode voltage and current, the impedance of the transmission lines in MITL region is suggested to increase along the direction of the incident wave and should be the root-mean-square of the effective impedances on both ends. The leading edge of measured voltage and current can
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Key words:
- diode /
- wave process /
- impedance discontinuity /
- time-dependent impedance /
- waveform characteristics
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