Novel dual‐mode ring resonators with very low sensitivity to substrate thickness

This paper presents the design of two filters at a center frequency of 1 GHz using a novel type of ring resonator. Their advantage over conventional microstrip ring resonators lies on their lower-frequency sensitivity to substrate thickness due to the addition of interdigital capacitors that concentrate the electric field near the surface. © 2005 Wiley Periodicals, Inc. Microwave Opt Technol Lett 47: 381–384, 2005; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.21175

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