Passive pulse compression with high gain and high efficiency using helically corrugated waveguide

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%.