Open Complementary Split Ring Resonators (OCSRRs) and Their Application to Wideband CPW Band Pass Filters

• Published in: IEEE microwave and wireless components letters Vol. 19; no. 4; pp. 197 - 199
• Main Authors: Velez, A., Aznar, F., Bonache, J., Velazquez-Ahumada, M.C., Martel, J., Martin, F.
• Format: Journal Article
• Language: English
• Published: New York, NY IEEE 01-04-2009; Institute of Electrical and Electronics Engineers
• Subjects: Applied sciences; Band pass filters; Band pass filters (BPFs); Bandpass filters; Capacitance; Circuit properties; Circuits; coplanar waveguide (CPW); Coplanar waveguides; duality; Electric, optical and optoelectronic circuits; electrically small resonators; Electronic circuits; Electronics; Etching; Exact sciences and technology; Frequency filters; Hooks; Inductance; Microwave circuits, microwave integrated circuits, microwave transmission lines, submillimeter wave circuits; Microwaves; Optical ring resonators; Orientation; Oscillators, resonators, synthetizers; Resonance; Resonators; split ring resonators (SRRs); Strips; Tanks; Wideband; Waveguide filters; Open resonator; Wide band; Ring resonator; electrically small resonators; Resonance frequency; coplanar waveguide (CPW); Band pass filter; Coplanar waveguides; split ring resonators (SRRs); duality; Band pass filters (BPFs)
• ISSN: 1531-1309; 1558-1764
• DOI: 10.1109/LMWC.2009.2015490

In this letter, open complementary split ring resonators (OCSRRs) are introduced for the first time. Such resonators are the dual counterparts of the open split ring resonators (OSRRs), introduced in 2004 by some of the authors, and consist on a pair of concentric hooks etched on a metal layer in opposite orientation. It is shown in the letter that OCSRRs can be modeled by means of an LC parallel resonant tank and that this particle roughly exhibits half the resonance frequency of the complementary split ring resonator (CSRR), hence being electrically very small. The interest of these resonators is illustrated through their application to a wideband coplanar waveguide band pass filter.