Frequency Domain Analysis of Periodic Non uniform Substrate Integrated Waveguide Transmission Lines

In this paper a new method for the analysis of non uniform substrate integrated waveguide transmission lines is developed. The proposed approach uses the method of moments with frequency dependent basis functions derived from the structure's propagation characteristics. The stability and speed of this method are demonstrated by analyzing non uniform structures. The obtained results for a structure with periodically varying width were compared to those obtained by HFSS simulations and a good agreement has been observed with much lower computation time.