A systematic implementation of elliptic low-pass filters using defected ground structures

D. Suhas, C.R. Lakshmi, Zinka Srinivasa Rao and D. Kannadassan

Journal of Electromagnetic Waves and Applications, 2015, vol. 29, issue 15, 2014-2026

Abstract: For the past decade, defected ground structures (DGSs) are largely used in the implementation of low-pass filters, without a systematic approach. In this paper, a simple systematic approach for the design of elliptic low-pass filters using DGSs is proposed. An empirical model for a simple rectangular slot DGS is extracted for its equivalent circuit. Using this model, low-pass filters for various orders are designed for critical filter specifications and optimized by reducing the parasitic effects induced by DGSs. This systematic implementation of DGS-based filters achieves more than 90% of the desired filter specifications. Due to the improved slow-wave factor and power handling capacity of DGSs, the filter is more compact and reliable than the conventional filters.

Date: 2015
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DOI: 10.1080/09205071.2015.1073635

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