2009
DOI: 10.1063/1.3056052
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Analytical formulation for the resonant frequency of split rings

Abstract: A simple approximate expression is derived for the resonant frequency of a singly split single ring that is among the first microwave resonators designed to be small relative to the wavelength. In addition to the usual gap capacitance the concept of surface capacitance is introduced. The surface capacitance is determined analytically by two different methods, first using analytical expressions for the electric field of a split cylinder, and second by using conformal mapping. Taking two practical examples the r… Show more

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Cited by 153 publications
(83 citation statements)
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“…We find that it will result in a great offset of resonant frequency without consideration of the capacitance of the gaps. If the gap is narrow, its capacitance can be written as C gap = ε 0 ch/g + C 0 , with C 0 = ε 0 (h + c + g) [24]. According to the formulations given in Ref.…”
Section: Comparisons Between the Results Respectively From Retrieval mentioning
confidence: 99%
“…We find that it will result in a great offset of resonant frequency without consideration of the capacitance of the gaps. If the gap is narrow, its capacitance can be written as C gap = ε 0 ch/g + C 0 , with C 0 = ε 0 (h + c + g) [24]. According to the formulations given in Ref.…”
Section: Comparisons Between the Results Respectively From Retrieval mentioning
confidence: 99%
“…The gap capacitance is calculated by the expression for the parallelplate capacitor of the gap with the correction due to the fringing fields. The surface capacitance is calculated by the analytical expression for the surface capacitance of a metallic split ring [4].…”
Section: Parameter Extraction For Equivalent Circuitmentioning
confidence: 99%
“…These frequency selective structures are usually realized as dielectric and metallic loop geometries. Geometry of the structure, as well as its material give rise to an equivalent electrical network of resistances, capacitances, and inductances [1,2]. This network exhibits a resonant characteristic at a certain resonant frequency determined by the resistances, capacitances, and inductances associated with the geometry and the materials.…”
Section: Introductionmentioning
confidence: 99%