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Coplanar waveguide structures loaded with split‐ring resonators
Author(s) -
Falcone F.,
Martín F.,
Bonache J.,
Marqués R.,
Sorolla M.
Publication year - 2003
Publication title -
microwave and optical technology letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.304
H-Index - 76
eISSN - 1098-2760
pISSN - 0895-2477
DOI - 10.1002/mop.11269
Subject(s) - coplanar waveguide , microwave , resonator , split ring resonator , optoelectronics , materials science , cutoff frequency , microstrip , transmission line , multi band device , resonance (particle physics) , electrical engineering , telecommunications , physics , engineering , particle physics , antenna (radio)
Coplanar waveguide (CPW) transmission lines periodically coupled to split‐ring resonators (SRRs) are analyzed, designed, and characterized. Due to inductive coupling between the lines and SRRs, signal propagation is inhibited in the vicinity of the resonant frequency of the rings. The result is a stop‐band behavior that can be of interest for the elimination of frequency parasitics in CPW‐based devices. Two different approaches are envisaged: a uniplanar structure, where CPW and rings share the same metal level; and a bimetal structure with SRRs etched on the back side of the substrate. It has been found that the latter exhibits almost negligible insertion losses in the pass band, and sharp cutoff and a high level of rejection in the stop band, with few unit cells. Since ring dimensions are small compared to the signal wavelength at resonance, the proposed SRR‐CPWs are very promising for the design of miniaturized microwave circuits. © 2004 Wiley Periodicals, Inc. Microwave Opt Technol Lett 40: 3–6, 2004; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.11269