DocumentCode :
81232
Title :
Displacement Sensor Based on Diamond-Shaped Tapered Split Ring Resonator
Author :
Horestani, Ali K. ; Fumeaux, Christophe ; Al-Sarawi, Said F. ; Abbott, Derek
Author_Institution :
Sch. of Electr. & Electron. Eng., Univ. of Adelaide, Adelaide, SA, Australia
Volume :
13
Issue :
4
fYear :
2013
fDate :
Apr-13
Firstpage :
1153
Lastpage :
1160
Abstract :
Split-ring resonators (SRRs) are ideal structures for the realization of compact high-sensitivity and high-resolution sensors due to their high-quality factor resonance, compact size, and high sensitivity to changes in the constituent materials and physical dimensions. This paper presents a displacement sensor based on a diamond-shaped tapered SRR coupled to a coplanar waveguide. Two significant improvements over previous designs are reported. Firstly, the proposed sensor has higher dynamic range and linearity for displacement sensing. Secondly, compared with previous designs, where the displacement changes both the resonant frequency and depth of the transmission notch, the proposed sensor has a fixed resonant frequency. This is an important improvement since the sensor can be operated at a single fixed frequency and bypass the need for a frequency-sweeping microwave source and measurement system such as an expensive network analyzer. It is shown that, while preserving the compact size, the proposed sensor also benefits from a lower operating frequency. The design principle and simulation results are validated through measurement.
Keywords :
Q-factor; carbon; coplanar waveguides; displacement measurement; microwave detectors; microwave measurement; microwave resonators; network analysers; C; compact size; coplanar waveguide; diamond-shaped tapered SRR; displacement sensor; frequency sweeping microwave source; measurement system; network analyzer; quality factor resonance; resonant frequency; split ring resonator; transmission notch; Coplanar waveguides; Dynamic range; Frequency measurement; Linearity; Magnetic resonance; Sensitivity; Displacement sensor; metamaterials; microwave sensors;
fLanguage :
English
Journal_Title :
Sensors Journal, IEEE
Publisher :
ieee
ISSN :
1530-437X
Type :
jour
DOI :
10.1109/JSEN.2012.2231065
Filename :
6365733
Link To Document :
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