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Sensors 2012, 12(9), 11790-11797; doi:10.3390/s120911790

Alignment and Position Sensors Based on Split Ring Resonators

* ,
CIMITEC, Departament d’Enginyeria Electrònica, Universitat Autònoma de Barcelona, 08193 Bellaterra (Barcelona), Spain
* Author to whom correspondence should be addressed.
Received: 10 July 2012 / Revised: 16 August 2012 / Accepted: 20 August 2012 / Published: 29 August 2012
(This article belongs to the Special Issue Ultra-Small Sensor Systems and Components)
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In this paper compact alignment and position sensors based on coplanar waveguide (CPW) transmission lines loaded with split ring resonators (SRRs) are proposed. The structure consists of a folded CPW loaded with two SRRs tuned at different frequencies to detect both the lack of alignment and the two-dimensional linear displacement magnitude. Two additional resonators (also tuned at different frequencies) are used to detect the displacement direction. The working principle for this type of sensor is explained in detail, and a prototype device to illustrate the potential of the approach has been designed and fabricated.
Keywords: split ring resonators; coplanar waveguide; alignment sensors; position sensors split ring resonators; coplanar waveguide; alignment sensors; position sensors
This is an open access article distributed under the Creative Commons Attribution License (CC BY) which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Naqui, J.; Durán-Sindreu, M.; Martín, F. Alignment and Position Sensors Based on Split Ring Resonators. Sensors 2012, 12, 11790-11797.

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