为解决探地雷达用于隧道地质超前预报时探测距离小的问题，在分析了雪崩三极管工作原理的基础上，设计了基于两级雪崩三极管串行级联的窄脉冲产生电路。

The status in quo of Impulse Ground Penetrating Radar and the general principle of Avalanche Transistor are discussed then a new method for Avalanche simulation is given in this thesis.

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脉冲延迟量和超前量比损耗系统大，可用于光速控制，克服了微环带有损耗时产生的光强损耗和脉冲畸变。

These results show that the resonator with gain can be used to control the speed of light and to overcome the pulse loss and distortion in dissipative resonators.

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