Quasi-chipless wireless temperature sensor based on harmonic radar

A novel passive wireless temperature sensor is presented, which aims at operating in harsh environments. For this purpose, the tag is designed quasi-chipless and it uses a harmonic radar sensing principle: it combines the backscattering on the first harmonic of the transmitted frequency with frequen...

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Bibliographic Details
Published in:Electronics letters 2014-01, Vol.50 (2), p.86-88
Main Authors: Kubina, B, Romeu, J, Mandel, C, Schüßler, M, Jakoby, R
Format: Article
Language:English
Subjects:
Applied sciences
Backscattering
Clutter
digital readout
electromagnetic wave scattering
Exact sciences and technology
frequency 1.59 GHz
frequency 3.18 GHz
frequency position encoding
frequency transmission
harmonic radar sensing principle
Harmonics
harsh environment
Indoor
Instrumentation and measurement
microstrip antennas
passive quasi chipless wireless temperature sensor
patch antenna
Patch antennas
Radar
radar antennas
radar clutter
radar signal processing
Radiolocalization and radionavigation
resonance transmission peak
Sensors
tag signal
Telecommunications
Telecommunications and information theory
temperature 22 degC to 109 degC
temperature information encoding
temperature measurement
Temperature sensors
wireless indoor measurement
wireless readout
wireless sensor networks
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Summary:A novel passive wireless temperature sensor is presented, which aims at operating in harsh environments. For this purpose, the tag is designed quasi-chipless and it uses a harmonic radar sensing principle: it combines the backscattering on the first harmonic of the transmitted frequency with frequency-position encoding of the measured value. The harmonic radar approach brings significant advantages for the wireless readout, since it isolates the undesired radar clutter from the useful tag signal. The tag signal carries the desired temperature information encoded in the position of a resonance transmission peak. The tag is built up planar and consists of two patch antennas, a temperature-dependent bandpass filter and a diode-based harmonic generator. It works at 1.59 GHz and backscatters at 3.18 GHz. Wireless indoor measurements have proven the concept. The sensor has shown a temperature sensitivity of 1.2 MHz/K in the range of 22–109 °C.
ISSN:0013-5194
1350-911X
1350-911X
DOI:10.1049/el.2013.3061