Study and Design of Bandstop Filtres Based on a Multiple Co-Directional Complementary Split Ring Resonator (CSRR)

Abstract

The objective of this study is to enhance the performance of metamaterial filters. Indeed, the distinctive electromagnetic characteristics of metamaterials, along with their capacity to guide and manipulate electromagnetic waves in ways unattainable by natural materials, have rendered metamaterials progressively appealing in recent years. One type of metamaterial that has been studied extensively is the Split Ring Resonator (SRR) and its complementary counterpart (CSRR), Both of these structures possess dimensions significantly smaller than the wavelength. They demonstrate bandstop characteristics and exhibit negative permeability or negative permittivity in a narrow frequency range centered around their resonant frequencies. These frequency bands can be precisely and easily controlled in terms of frequency selectivity and rejection level by adjusting various parameters. As a result, these resonators are designed and optimized for use in the design of new filters. The obtained results confirm that the proposed metamaterial resonators significantly enhance the performance of the targeted applications.