Far-Field Interrogation of Microstrip Patch Antenna for Temperature Sensing Without Electronics

Temperature sensing without electronics is demonstrated through wireless interrogation of passive antenna-sensors. The sensor node is equipped with an ultra-wide-band microstrip antenna as the transmitting/receiving (Tx/Rx) antenna and a microstrip patch antenna serving as the temperature-sensing el...

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Bibliographic Details
Published in:IEEE sensors journal 2016-10, Vol.16 (19), p.7053-7060
Main Authors: Jun Yao, Tchafa, Franck Mbanya, Jain, Ankur, Tjuatja, Saibun, Haiying Huang
Format: Article
Language:English
Subjects:
antenna-sensor
condition monitoring
ENGINEERING
Microstrip antennas
passive wireless sensor
temperature sensor
Temperature sensors
Ultra wideband antennas
UWB antenna
Wireless communication
Wireless interrogation
Wireless sensor networks
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Description
Summary:Temperature sensing without electronics is demonstrated through wireless interrogation of passive antenna-sensors. The sensor node is equipped with an ultra-wide-band microstrip antenna as the transmitting/receiving (Tx/Rx) antenna and a microstrip patch antenna serving as the temperature-sensing element. A microstrip transmission line connecting the Tx/Rx antenna and the antenna-sensor delays the signal reflected from the sensing element and thus separated it from the background clutter. The operation principle of the wireless sensing scheme is first discussed, followed by the design and simulations of the sensor node circuitry. A digital signal processing algorithm that extracts the antenna resonant frequency from the wirelessly received signal is also described. Temperature tests were conducted to validate the performance of the wireless antenna sensor inside an oven.
ISSN:1530-437X
1558-1748
DOI:10.1109/JSEN.2016.2597739