Parametric Analysis of Wideband Substrate Integrated Waveguide Structure with Negligible Loss for High Power Application

Substrate integrated waveguide with insignificant loss is theoretically designed at X and Ku band with cutoff frequency 9.16 GHz. Very high return loss speaks in favor of the proposed design, and that is also increasing as progressed towards X to Ku band. Impedance variation with wavelength exhibits monotonic decreasing behavior for different effective width, which voices for higher width within practical range of interest for higher output current. Substrate material plays vital role in tailoring the impedance of the structure, and therefore essential prior to fabrication for specific application. Restrained TE10 mode reveals the fact of negligible leakage current, essential for high power application.