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Sensors 2014, 14(1), 595-605; doi:10.3390/s140100595
Article

Quality Factor Effect on the Wireless Range of Microstrip Patch Antenna Strain Sensors

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Received: 20 November 2013 / Revised: 20 December 2013 / Accepted: 23 December 2013 / Published: 2 January 2014
(This article belongs to the Section Physical Sensors)
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Abstract

Recently introduced passive wireless strain sensors based on microstrip patch antennas have shown great potential for reliable health and usage monitoring in aerospace and civil industries. However, the wireless interrogation range of these sensors is limited to few centimeters, which restricts their practical application. This paper presents an investigation on the effect of circular microstrip patch antenna (CMPA) design on the quality factor and the maximum practical wireless reading range of the sensor. The results reveal that by using appropriate substrate materials the interrogation distance of the CMPA sensor can be increased four-fold, from the previously reported 5 to 20 cm, thus improving considerably the viability of this type of wireless sensors for strain measurement and damage detection.
Keywords: wireless strain sensor; microstrip patch antenna; quality factor; structural health monitoring; passive sensor wireless strain sensor; microstrip patch antenna; quality factor; structural health monitoring; passive sensor
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Daliri, A.; Galehdar, A.; Rowe, W.S.T.; John, S.; Wang, C.H.; Ghorbani, K. Quality Factor Effect on the Wireless Range of Microstrip Patch Antenna Strain Sensors. Sensors 2014, 14, 595-605.

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