Design of High Quality Factor and Harmonic Reduced Bandpass Filter Using Coupled Resonators and Defected Ground Structures
Tamasi Moyra1, Susanta Kumar Parui2, Santanu Das3
1Tamasi Moyra, Department of Electronics and Communication Engineering, College of Engineering and Management, Kolaghat (West Bengal), India.
2Susanta Kumar Parui, Department of Electronics and Tele-Communication Engineering, Bengal Engineering and Science University, Shibpur, Howrah (West Bengal), India.
3Santanu Das, Department of Electronics and Tele-Communication Engineering, Bengal Engineering and Science University, Shibpur, Howrah (West Bengal), India.
Manuscript received on December 05, 2011. | Revised Manuscript received on December 17, 2011. | Manuscript published on January 05, 2012. | PP: 185-188 | Volume-1 Issue-6, January 2012. | Retrieval Number: F0294111611/2012©BEIESP
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© The Authors. Published By: Blue Eyes Intelligence Engineering and Sciences Publication (BEIESP). This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/)
Abstract: Design of good quality factor and high selective Band pass filter (BPF) is an emerging challenge of microwave engineers in modern RF, microwave and millimeter wave communication systems. Front end of the receiver in a communication system demands high performance BPF to select the required signal from the unwanted adjacent signals with improved selectivity. In this paper one end coupled Band pass filter with centre frequency 2GHz and 30% Fractional Bandwidth (FBW) at -20 dB has been designed with 4 rectangular split ring coupled resonators forming with 50 conventional Microstrip transmission line. This designed BPF has been simulated with the help of MoM besed IE3D electromagnetic simulation software. The proposed BPF provides first unwanted harmonic or spurious nearer to the twice of its passband centre frequency and some other higher harmonics at different higher frequencies. Therefore, in this paper attention also has been given towards the suppression of harmonics with the help of Defected Ground Structures (DGS) in addition with the proposed coupled microstrip BPF. Finally, one novel BPF has been designed for Satellite, GPS and Bluetooth applications of modern wireless communication systems.
Keywords: Microstrip, coupled resonator, defected ground structure, elliptical, bandpass filter, Q-factor, selectivity.