A resonant printed-circuit sensor for remote query monitoring of environmental parameters

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Published under licence by IOP Publishing Ltd
, , Citation Keat Ghee Ong and Craig A Grimes 2000 Smart Mater. Struct. 9 421 DOI 10.1088/0964-1726/9/4/305

0964-1726/9/4/421

Abstract

A new type of remote query sensor for monitoring pressure, relative humidity, and phase-transitions is presented. The sensor consists of a planar inductor-capacitor resonant circuit, the resonant frequency of which changes in response to different environmental parameters. The sensor does not require an internal power source, rather it responds to the interrogation field. A loop antenna is used to monitor the sensor.

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