Study of metallic photonic Band Gap cavity for high power microwave devices

Photonic Band Gap (PBG) structures are periodic lattices of dielectric or metallic inclusions which provide an effective way to control and manipulate electromagnetic radiation. In this paper, we proposed the design of a PBG resonant cavity with two dimensional metallic lattices and simulated it with using the three dimensional Electromagnetic software, CST Microwave Studio. Dispersion characteristic is obtained using quasistatic approach. The resonant frequency of PBG cavity is designed for 35 GHz operating in higher order mode i.e. TE₀₄₁ mode. The existence of all the modes in the cavity has been studied and found the presence of only the desired mode in the structure and other modes are found to be widely apart. For the PBG cavity, the scattering parameter is obtained from simulation.