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Multi-section dumbbell-shaped defected ground plane structures for designing microstrip filters with large stop band rejection and controllable center frequency

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3 Author(s)
Nair, M.D.V. ; Dept. of Commun. & Comput. Eng., LNM Inst. of Inf., Jaipur ; Tomar, R. ; Bhartia, P.

This paper proposes two new multi-section dumbbell-shaped defected ground plane structures (DGS). The defects are created in the ground plane of the conventional single-layer microstrip transmission line. The proposed DGSpsilas application in microwave filtering is investigated. It turns out that these new DGSpsilas can be used to realize notch filters (i.e. narrow-band band-stop filters) with steep rejection characteristics in the stopband, and that the center frequency of the design can be systematically controlled through controlling one physical dimension of the DGS pattern.

Published in:

Recent Advances in Microwave Theory and Applications, 2008. MICROWAVE 2008. International Conference on

Date of Conference:

21-24 Nov. 2008