AN IMPROVEMENT OF DEFECTED GROUND STRUCTURE LOWPASS/BANDPASS FILTERS USING H-SLOT RESONATORS AND COUPLING MATRIX METHOD
Keywords:H-defected ground structure (H-DGS), microstrip lowpass filter (LPF), microstrip bandpass filter (BPF)
A novel compact wideband high-rejection lowpass filter (LPF) using H-DGS is presented. The proposed filter has neither open stub nor cascaded high-low impedance elements. It consists of two coupled H-slots in the ground plane along with a compensated line. The effect of the new slot on the filter performance is examined. The comparison with the conventional filters shows that the proposed one guarantees a large rejected-band of 20dB from 2.5 to 16 GHz. Experimental measurements by means of HP8719D network analyzer agree well with simulated results which are carried out by Microwave Office. Based on H-DGS LPF Structure, a novel bandpass filter (BPF) will be is designed and tested verified by using both J-inverter and coupling matrix methods.
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A. Boutejdar, M. Challal, A. Omar, E. Burte, R. Mikuta and A. Azrar; A Novel Band-Stop Filter Using Octagonal- Shaped Patterned Ground Structures along with Interdigital and Compensated Capacitors; ACES Journal - The Applied Computational Electromagnetics, Issue: Volume 26, number 10, July 2011.
A. Boutejdar, A. S. Omar, M. Senst, A. Batmanov and E. Burte and R. Mikuta; A NewDesign of a Tunable WLAN-Band Pass Filter Using a Combination of Varactor Device, RF-Choke and Hairpin-Slottet Ground Structure (SGS); Proc. 41th European Microwave Conference, EuMC 2011 (Manchester, UK), October 2011
Ahmed Boutejdar, Abbas Omar, E. P. Burte and R. Mikuta, Design of Compact Ultra-Wide Stopband Lowpass Filter Using a USlotted Ground Structure (SGS) and Multilayer-Technique, Recent Patents on Electrical Engineering journal, Bentham Science Publishers, Volume 4, Number 2, pp: 120-126, Mai 2011.
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Ahmed Boutejdar, Omar Abbas and Burte P. Edmund, A New Technique to Transform a Fractal Low-Pass to Band-Pass Filter Using a Simple Combination of Defected Ground Structure (DGS) and Gap Capacitive (German), Radar, Communication and Measurement (RADCOM 2011), Helmut-Schmidt-Universität/Universität der Bundeswehr, Hamburg, April 6 - 7, 2011.