对一种改进型螺旋波纹波导实现高增益高效率被动式脉冲压缩进行了研究，并利用微扰理论求解出了该波导的损耗特性。结合波导的色散和损耗特性，设计了输入微波的频率调制形式。还对改进型螺旋波纹波导进行了模拟研究，在输入脉冲宽度为66 ns的条件下，得到了半高宽为1.9 ns的压缩脉冲，增益为21.2倍，脉冲宽度比为34.7倍，压缩效率为61%，这表明改进型螺旋波纹波导应用于被动式脉冲压缩具有高效率高增益特性。

A modified helically corrugated waveguide was investigated for passive pulse compression with high gain and high efficiency, and its loss coefficient was obtained by employing the method of perturbation of Maxwell’s equations. According to the dispersion characteristics and loss coefficient of this waveguide, the optimum frequency sweep mode of input microwave pulse was designed, and the passive compression was simulated. This simulation demonstrates that a microwave pulse of 66 ns duration can be compressed into a 1.9 ns pulse with a power compression ratio of 21.2, a time compression ratio of 34.7 and an efficiency of 61%.