volume | PIER Journals

2011-06-08

A Miniaturized Lowpass/Bandpass Filter Using Double Arrow Head Defected Ground Structure with Centered Etched Ellipse

Mohamed Al Sharkawy,

Dr. Mohamed Al Sharkawy

Department of Electronics and Communications Engineering

Arab Academy for Science, Technology & Maritime Transport

Egypt

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Darwish Abd El-Aziz Mohamed,

Dr. Darwish Abd El-Aziz Mohamed

Electronics and Communications Department, School of Engineering and Technology

Arab academy for Science, Technology, and Maritime Transport

Egypt

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E. Mahmoud

Dr. E. Mahmoud

Department of Electronics and Communications Engineering, School of Engineering and Technology

Arab academy for Science, Technology, and Maritime Transport

Egypt

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Progress In Electromagnetics Research Letters, Vol. 24, 99-107, 2011

doi:10.2528/PIERL11042909 | Google Scholar

Abstract

A new double arrow head defected ground structure (DGS) with centered etched ellipse is proposed for designing a multilayer low pass filter (LPF) with wide rejection band and low insertion loss in the stop-band. The prototype LPF consists of three double arrow head DGS with centered etched ellipse in the ground plane and compensated capacitor on the top layer of a 30×40 mm² Roger RT/Duroid5880 substrate having relative permittivity (ε_r) of 2.2 and thickness of 0.78 mm. The cutoff frequency is equal to 1.07 GHz .The prototype LPF is then realized as multilayer structure to enhance the filter response and reduce its size. The size reduction of the proposed multi-layer LPF is about 26% more than the conventional one. The proposed filter has been fabricated and measured. Good agreement is achieved between the simulated and measured results. The filter presents the advantages of compact size; low insertion loss and high out-band suppression. Finally, the multilayer LPF is transformed to band pass filter (BPF) using J-inverter method.

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Mohamed Al Sharkawy, Darwish Abd El-Aziz Mohamed, and E. Mahmoud, "A Miniaturized Lowpass/Bandpass Filter Using Double Arrow Head Defected Ground Structure with Centered Etched Ellipse," Progress In Electromagnetics Research Letters, Vol. 24, 99-107, 2011.
doi:10.2528/PIERL11042909

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