Simulation study on passive compression using helically corrugated waveguide

A method for passive compression of a frequency-swept wave packet propagating through helically corrugated waveguide as the dispersive medium has been developed. By 3D fully electromagnetic particle-in-cell (PIC) code， the dispersion of a helically corrugated waveguide and the ways for improving the pulse compression ratio were investigated. The power compression ratio was 6.65 higher than previous simulation results after optimization. The simulation study demonstrates that a better compression result can be obtained by optimizing the frequency sweep mode of input microwave pulse， using improved elliptical waveguide and extending the length of the helical tapers.