• Ahmed Boutejdar
  • Abbas Omar
  • Edmund P. Burte



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. Abdel-Rahman, A. K. Verma, A. Boutejdar, and A. S. Omar, "Control of bandstop response of Hi-Lo microstrip lowpass filter using slot in ground plane,`` IEEE Trans. Microw. Theory Tech., vol.52, pp. 1008 – 1013, Mar. 2004.

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Ahmed Boutejdar, Adel Elsherbini and A. S. Omar, "A Compact Microstrip Multi-Layer Lowpass Filter Using Triangle Slots Etched in the Ground Plane,`` in Proc. 36th Eur. Microw. Conf., (EuMC), Manchester, UK, September 2006

A. Boutejdar, A.Ramadan, M. Makkey and A. S. Omar, ``Design of Compact Microstrip Lowpass filter Based on Novel U-Resonator Using Defected Ground Structure and Compensated Microstrip Line,`` in Proc. 36th Eur. Microw. Conf., (EuMC), Manchester, Manchester, UK, September 2006, pp. 267-270,

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Ahmed Boutejdar, Smain Amari and Abass Omar, "A novel compact J-admittance inverter-coupled microstrip bandpass filter using arrowhead-shape as defected ground structure,`` Microw. Opt Technol. Lett, vol 52, no. 1, pp. 34–38, Jan. 2010.

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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.

A. Boutejdar, A. Omar, E. P. Burte, R. Mikuta, A. Batmanov;

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.




How to Cite

Ahmed Boutejdar, Abbas Omar, & Edmund P. Burte. (2011). AN IMPROVEMENT OF DEFECTED GROUND STRUCTURE LOWPASS/BANDPASS FILTERS USING H-SLOT RESONATORS AND COUPLING MATRIX METHOD. Journal of Microwaves, Optoelectronics and Electromagnetic Applications (JMOe), 10(2), 295–307.



Regular Papers