Design and characterization of a novel toroidal split-ring resonator

Abstract

The design and characterization of a novel toroidal split-ring resonator (SRR) is described in detail. In conventional cylindrical SRRs, there is a large magnetic flux within the bore of the resonator. However, there also exists a non-negligible magnetic flux in the free space surrounding the resonator. The energy losses associated with this radiated power diminish the resonator's quality factor. In the toroidal SRR, on the other hand, the magnetic field lines are strongly confined within the bore of the resonator resulting in high intrinsic quality factors and stable resonance frequencies without requiring additional electromagnetic shielding. This paper describes the design and construction of a toroidal SRR as well as an experimental investigation of its cw response in the frequency-domain and its time-domain response to an rf pulse. Additionally, the dependence of the toroidal SRR's resonant frequency and quality factor on the strength of inductive coupling to external circuits is investigated both theoretically and experimentally.

arXiv comment11 pages, 9 figures

References in corpus (4)

• Permittivity measurements of biological samples by an open-ended coaxial line
• Single Superconducting Split-Ring Resonator Electrodynamics
• Precision Microwave Electrodynamic Measurements of K- and Co-doped BaFe${}_2$As${}_2$
• Using split-ring resonators to measure the electromagnetic properties of materials: An experiment for senior physics undergraduates

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• Probing Split-Ring Resonator Permeabilities with Loop-Gap Resonators
• Inductive Power Transfer Through Saltwater