Comparative Study of a Micro-Strip Line with DGS and without DGS

The low pass filter is used in many application of microwave communication. Therefore it is necessary to design a good low pass filter for the faithful reproduction of wanted signals. Previously used methods to design the low pass filter using insertion loss method don’t give a very good flat response. So, a new method has been proposed for the filter design which gives a good response as compared to the conventional designs. A new DGS (Defected Ground Structure) technique to design a low pass filter is proposed here, ground is defected or cut in a desired shape which improves its performance. The size of filter is also reduced with the help of DGS.