DESIGN OF BANDPASS FILTER USING COPLANAR WAVEGUIDE WITH DEFECTED GROUND STRUCTURE
M.Anushiya 1, K.J.Prasanna venkatesan 2
1 PG student, Department of ECE, National Engineering College, Kovilpatti, Tamil Nadu, India.
2 Assistant Professor (SG), Dept of ECE, National Engineering College, Kovilpatti, Tamil Nadu.
The design and simulation of coplanar waveguide (CPW) band pass filter (BPF) has been described in this paper. It mainly focuses on Defected Ground Structure (DGS), where U-shaped DGS with open stub in transmission line has been introduced. By etching the DGS pattern in ground and transmission will change the distribution of inductance and capacitance to produce filtering effect. This paper also discusses about the influence of geometrical parameter l for the improvement in the frequency response of band pass filter. As increasing the dimension of the geometric parameter l shift the center frequency to the higher frequencies. This filter offers a bandwidth of 1.65 GHz with pass band ranging from 2.1 GHz to 3.75 GHz with a stop band rejection is about -28 dB.
