Wideband amplification of transient signals for application in pulse compression

Helically corrugated waveguide can be used as a dispersive medium to compress long duration chirping signals into higher power shorter duration microwave pulses 1 , 2 , 3 . It has the advantage over smooth bore circular waveguide in that its dispersion can be shaped to have a large change in group velocity over a relatively small frequency range, but still be far from ‘cut-off’ where there is a high risk of reflection.