Title

A Low-Profile Wireless Passive Temperature Sensor Using Resonator/Antenna Integration Up to 1000 degrees C

Authors

Authors

H. T. Cheng; S. Ebadi;X. Gong

Comments

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Abbreviated Journal Title

IEEE Antennas Wirel. Propag. Lett.

Keywords

High-temperature techniques; microwave sensors; slot antennas; temperature measurement; ALUMINA; Engineering, Electrical & Electronic; Telecommunications

Abstract

A novel wireless temperature sensor is presented herein for high-temperature applications. This sensor is robust in harsh environments using stable materials and purely passive structures. The resonant frequency of the sensor is determined by the temperature-dependent dielectric constant of the substrate material. The temperature can be wirelessly detected by sensing the resonant frequency of the sensor. The integration of the resonator and antenna enables realization of low-profile and compact sensors. Measured resonant frequency of the sensor decreases from 5.12 to 4.74 GHz when the temperature increases from 50 degrees C to 1000 degrees C. This corresponds to a variation of dielectric constant from 9.7 to 11.2 for the alumina substrate. The presented sensor structure is scalable in size or frequency based on the design requirements.

Journal Title

Ieee Antennas and Wireless Propagation Letters

Volume

11

Publication Date

1-1-2012

Document Type

Article

Language

English

First Page

369

Last Page

372

WOS Identifier

WOS:000303017400002

ISSN

1536-1225

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