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

    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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