摘要:
采用数值模拟与实验相结合的方法,在没有功率容量不足问题的情况下,研究了磁绝缘线振荡器（MILO）的输出微波脉宽和功率效率与类似三角形二极管电压的关系,研究结果表明：在相同宽度的电压条件下,随着电压幅度的增大,输出微波的底宽和半高宽相应增大,功率效率先增大,当达到饱和后功率效率逐渐降低；在相同电压幅度条件下,随着二极管电压上升沿（斜率不变）的增大,输出微波的半高宽略有增大,但功率效率略有降低。因此,在有限脉宽的类似三角形二极管电压条件下,通过增大二极管电压上升沿的方法,可以有效地增大输出微波脉宽；而在有限电压幅度条件下,通过减小电压上升沿的方法,可以有效地增大输出微波的功率。选择适当的二极管电压参数,可以解决MILO器件在类似三角形二极管电压条件下的输出微波功率和脉宽两个指标相匹配的问题。
Abstract:
Resorting to PIC simulation and experimental investigation, the relation between the output microwave width (power efficiency) and the input triangle voltage waveform for a magnetically insulated transmission line oscillator (MILO) is analyzed without power capability problem. The analysis results show that: (a) On the condition of the same width of the input voltage, with the increasing of the amplitude of the input voltage, the putout microwave bottom width and the FWHW increase; and the power efficiency increase firstly and then decrease when the power is saturated. (b) On the condition of the same amplitude of the input voltage, with the increasing of the rising edge (with stable slope) of the input voltage, the putout microwave width increases; and the power efficiency decreases. Therefore, on the condition of the limited pulse width of the input voltage, by the way of increasing the rising edge of the input voltage, the output microwave width can be increased. And on the condition of the limited amplitude of the input voltage, by the way of decreasing the rise-time of the input voltage, the output microwave power can be increased. With the proper input voltage parameter, the matching problem of the key parameters between the microwave power and the width for a MILO on the condition of the input triangle voltage is solved.
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