Dispersion characteristics of a slow wave structure with metal photonic band gap cells

A slow wave structure consisting of metallic photonic band gap cells for a Ka-band Cherenkov device is proposed in this paper. Attributing to the mode selectivity of the photonic band gap, only the TM01-like mode among the TM0n-like modes exists in such a slow wave structure. The dispersion characteristics of the slow wave structure are investigated by simulation and experiment. It is shown that the dispersion curve obtained from the experiment is in agreement with that from simulation.