SIW Power Divider and its Performance Analysis Affected by Number of Incorporated CSRRs

This paper discusses the design of substrate integrated waveguide (SIW) power divider and its performance analysis affected by the number of incorporated complimentary split ring resonators (CSRRs). The proposed SIW power divider is designed on an FR4 epoxy dielectric substrate with the thickness of 1.6mm. The effect of increasing the amount of CSRRs incorporated into the SIW surface is analyzed for some parameters, namely frequency response, return loss, and insertion loss. Each CSRR is composed of a pair of concentric circle-shaped slot rings fitted with a gap in the opposite ends. The analysis results shows that the frequency response of SIW power divider decreases as the increase of number of CSRRs. Meanwhile the return loss and the insertion loss tend to be poorer for the higher number of CSRRs incorporation although the poorness of quality shows no particular pattern.