RF pulse compression using multimode delay lines

The characteristics of multimode delay line on RF pulse compression has been analyzed using a full 3D electromagnetic field inside a structure based on the finite element method (FEM). The multimode delay line performance is sensitive to the delay line length whose value is equal to a fractional wavelength and the output port. It allows transmission equal to one and different compression ratios with various delay line lengths for the useful circular TE₀₁ mode of the two and seven guide feeding wraparound mode converter. The relative input and output power with delay line length effect for the TE₀₁ mode are obtained using numerical simulations to demonstrate the transmission and compression ratio variations of the x- band linear colliders.