Open AccessImprovement in Cutoff Frequency of Microstrip Butterworth Low Pass Filter using DGS Technique
Author(s) -
Kalyan Acharjya,
Debiprasad Priyabrata Acharya,
Girijashankar Sahoo,
Chandra Shekhar Rajora
Publication year - 2019
Publication title -
international journal of engineering and advanced technology
Language(s) - English
Resource type - Journals
ISSN - 2249-8958
DOI - 10.35940/ijeat.b2699.129219
Subject(s) - cutoff frequency , low pass filter , butterworth filter , filter (signal processing) , frequency response , rectangle , chebyshev filter , microstrip , electronic engineering , acoustics , band pass filter , materials science , high pass filter , computer science , physics , mathematics , electrical engineering , engineering , optoelectronics , geometry
This paper presents the design, analysis and fabrication of Butterworth Low pass filter with sharp rejection response using defected ground surface technique. The work is carried out to design a low pass filter with cut-off frequency 2.5 GHz to achieved the broad frequency response; the first step is to make a rectangle of 10x10mm at ground surface and the equivalent circuit for the DGS, subsequently followed to consequent L-C parameters extraction using analysis of S parameters response (EM simulation). The designed Butterworth low pass filter is realized and optimized using DGS (Defected Ground Structure) to attain a compact size, satisfactory transition sharpness along with low insertion loss in pass band and wide rejection in the stop band. The fabricated device showed the good conformity with theoretical and VNA measured result.