Parametric effect of defected ground structure (DGS) on frequency of a bandpass filter

Author

Khan, Mohammad Taha ; Zakariya, M.A. ; Saad, Mohamad Naufal Mohamad ; Baharudin, Z. ; Rehman, M. Z. Ur

Author_Institution

Dept. of Electr. & Electron. Eng., Univ. Teknol. PETRONAS, Tronoh, Malaysia

fYear

2013

fDate

9-11 Dec. 2013

Firstpage

184

Lastpage

188

Abstract

A stepped impedance resonator bandpass filter (SIR BPF) is proposed and designed by placing defected ground structure (DGS) in the ground plane. DGS is used for its property of miniaturizing the size of microwave filter and also improving the mutual coupling between the resonators. The proposed dumbbell shaped DGS is used to tune the bandpass filter to 2.4 GHz with dimension of 28 mm × 30 mm. A wide tuning range of 0.64 GHz is achieved by tuning the height, length and width dimension of DGS unit cell. This filter gives an insertion loss of -0.23 dB, a return loss of -38.03 dB and -3 dB bandwidth of 0.56 GHz. The tuning of SIR bandpass filter, using DGS structure parameters is discussed here. Moreover, the effect of different parameters of DGS on center frequency is shown and discussed with results.

Keywords

band-pass filters; defected ground structures; microwave filters; microwave resonators; DGS structure parameters; SIR BPF; SIR bandpass filter; bandwidth 0.56 GHz; defected ground structure; frequency 2.4 GHz; insertion loss; loss -0.23 dB; loss -38.03 dB; microwave filter; mutual coupling; stepped impedance resonator bandpass; wide tuning range; Band-pass filters; Cutoff frequency; Microwave circuits; Microwave communication; Microwave filters; Resonator filters; Tuning; Bandpass Filter; DGS; Frequency Tuning; SIR;

fLanguage

English

Publisher

ieee

Conference_Titel

RF and Microwave Conference (RFM), 2013 IEEE International

Conference_Location

Penang

Print_ISBN

978-1-4799-2213-0

Type

conf

DOI

10.1109/RFM.2013.6757245

Filename

6757245