JCS_V4_N2_RP1 Anjali Sachan R.K. Chauhan Journal on Communication Engineering and Systems 2277-5242 4 2 1 4 Defected Ground Structure (DGS), Low Pass Filter (LPF), Micro Strip Filter Low pass filter is used to select low frequency signal and reject high frequency signal. Wireless devices require small devices to fulfil the miniaturization requirement. Here Defected Ground Structure (DGS) methodology is used for reducing the size of the Low Pass Filter. For low cut off frequency, we require large size filter and for high cut off frequency, we require small size filter. In this paper, low pass filter with new defected ground structure is presented. By using this defected ground structure the cut off frequency of Low Pass Filter is reduced from 2.1GHz to 1.19 GHz. Therefore, filter of cut off frequency 2.1GHz is now operating at cut off frequency 1.19GHz. So the size of the filter of cut off frequency 1.19GHz is reduced to 41.32 % as compared to the size of filter of cut off frequency 1.19GHz designed by conventional method. February - April 2015 Copyright © 2015 i-manager publications. All rights reserved. i-manager Publications http://www.imanagerpublications.com/Article.aspx?ArticleId=3338