NDLI: Transmission-line analysis of a capacitively coupled microstrip-ring resonator

Content Provider	IEEE Xplore Digital Library
Author	Cheng-Cheh Yu Kai Chang
Copyright Year	1963
Abstract	The resonant frequencies of a microstrip-ring resonator capacitively coupled to a feed line are accurately analyzed using a transmission-line model. By making use of ABCD- and Y-admittance matrices, a compact closed-form expression for the input impedance of the ring alone is analytically derived and shows that the ring ran be equivalently viewed as a frequency-dependent capacitor. The coupling gap is then modeled by an equivalent L-network comprising a parallel and a series gap capacitance obtained by modifying Garg and Bahl's closed-form expressions for an end-to-end microstrip gap. By simplifying the parallel and series combinations of the overall equivalent circuit, the total input impedance looking from the feed line to the gap is analytically derived to predict the resonant frequencies. To verify the analysis, the resonant frequencies of the capacitively coupled ring resonator have been accurately measured, with the experimental results showing very good agreement with the theoretical predictions.
Sponsorship	IEEE Microwave Theory and Techniques Society
Starting Page	2018
Ending Page	2024
Page Count	7
File Size	198892
File Format	PDF
ISSN	00189480
Volume Number	45
Issue Number	11
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1997-11-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Transmission lines Resonant frequency Feeds Closed-form solution Impedance Coupling circuits Microstrip resonators Coupled mode analysis Transmission line matrix methods Radio access networks
Content Type	Text
Resource Type	Article
Subject	Condensed Matter Physics Electrical and Electronic Engineering Radiation

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