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

作者：Suhas D; Lakshmi C R; Rao Zinka Srinivasa; Kannadassan D^*

来源：Journal of Electromagnetic Waves and Applications, 2015, 29(15): 2014-2026.

DOI：10.1080/09205071.2015.1073635

• defected ground structure (DGS)
• elliptic filters
• empirical modeling
• low-pass filter (LPF)

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.

• 出版日期2015-10-13