Abstract

Inmicrowave communication filters are more essential high frequency component. Toimprove the insertion loss the DGS technique is used. DGS i.e, (defected groundstructure) is a technique where cuts are drawn on ground to improve the resultsand reduce the size of filters. Band passes and band reject filters are thefilters which pass and reject the range of frequency. A band pass and bandreject filter is designed with GSM upper band center frequency i.e,1850Mhz.with DGS technique to improve the losses.DGS technique is a proposedversion of hexagonal ring and hexagonal head. Performance of filters has been comparedin terms of insertion loss. The simulation is carried out with CST software2010.

Keywords-Band pass filter, band rejectfilter, CST (Computer simulation technology) DGS (hexagonal ring and hexagonalhead)