Review Paper of DGS based Band Pass Filter

Abstract

The modern wireless communication systems require dual bandpass filters that work at multiple frequency bands. This paper provides a review of the literature on DGS based microstrip Band Pass Filter. Band Pass Filter’s features are low cost, compact dimensions, light weight and ground side a complete metallization structure. In recent years, a new concept has been applied to the ground plane structure. This concept is known as the Defected Ground Structure. Using DGS improved the electrical performance in the passband, sharp selectivity, unwanted frequency rejection, and circuit size reduction. The results in terms of insertion loss and return loss are analyzed in detail, which comparative study according to base on DGS and without DGS filters.