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• Durán-Sindreu, M
• Martín, F
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Sensors 2011, 11(8), 7545-7553; doi:10.3390/s110807545

Article

Novel Sensors Based on the Symmetry Properties of Split Ring Resonators (SRRs)

Jordi Naqui* , Miguel Durán-Sindreu and Ferran Martín

CIMITEC, Departament d’Enginyeria Electrònica, Universitat Autònoma de Barcelona, Bellaterra, Barcelona 08193, Spain

* Author to whom correspondence should be addressed.

Received: 1 June 2011; in revised form: 21 July 2011 / Accepted: 22 July 2011 / Published: 29 July 2011

(This article belongs to the Special Issue Metamaterials for Sensing)

Download PDF Full-Text [733 KB, uploaded 29 July 2011 15:28 CEST]

Abstract: The symmetry properties of split ring resonators (SRRs) are exploited for the implementation of novel sensing devices. The proposed structure consists of a coplanar waveguide (CPW) loaded with movable SRRs on the back substrate side. It is shown that if the SRRs are placed with the slits aligned with the symmetry plane of the CPW, the structure is transparent to signal propagation. However, if the symmetry is broken, a net axial magnetic field can be induced in the inner region of the SRRs, and signal propagation is inhibited at resonance. The proposed structures can be useful as alignment sensors, position sensors and angle sensors. This novel sensing principle is validated through experiment.

Keywords: split ring resonators; metamaterials; coplanar waveguide; position sensors; angle sensors

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