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Electromagnetically coupled microstrip square/circular ring resonators: Inset/offset feed variation effects on resonance frequency
Author(s) -
Ghanbari Hossein,
Karekar Ravi N.,
Aiyer Rohini C.
Publication year - 2007
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.22696
Subject(s) - offset (computer science) , resonator , microstrip , microwave , resonance (particle physics) , standing wave ratio , split ring resonator , physics , square (algebra) , optics , electronic engineering , acoustics , materials science , electrical engineering , engineering , telecommunications , microstrip antenna , mathematics , geometry , atomic physics , computer science , antenna (radio) , programming language
Inset/offset feed‐dependent variation of electromagnetically coupled microstrip square and circular ring resonators (MSRR/MCRR) over a wide range indicate overall increase and decrease in resonant frequency ( f r ) respectively. On the basis of the experimental results, equations are suggested to determine f r as a function of the normalized inset and offset feed positions. Equations are validated for a limited range. High values of quality factor Q = 618 are obtained with MSRR as compared with MCRR ( Q = 375) at two offset points near the ring edge with VSWR ≈ 1. This advantage can be used for applications such as frequency‐selective circuits and sensors. © 2007 Wiley Periodicals, Inc. Microwave Opt Technol Lett 49: 2118–2121, 2007; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.22696