Design and Characterization of a Passive Temperature Sensor Based on a Printed MIW Delay Line

A passive electromagnetic temperature sensor based on a magneto-inductive wave (MIW) delay line is presented. The working principle is the following: a reader sends a pulse in the time domain to the sensor, which produces a backscattered pulse whose amplitude depends on the temperature. The transduc...

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Bibliographic Details
Published inIEEE sensors journal Vol. 16; no. 22; pp. 7884 - 7891
Main Authors Martinez-Martinez, Jose Juan, Javier Herraiz-Martinez, Francisco, Galindo-Romera, Gabriel
Format Journal Article
LanguageEnglish
Published IEEE 15.11.2016
Subjects
Delay lines
Metamaterials
MIW
Sensor phenomena and characterization
split-ring resonator (SRR)
Temperature measurement
temperature sensor
Temperature sensors
Thermistors
time domain
Transmission line measurements
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Summary:A passive electromagnetic temperature sensor based on a magneto-inductive wave (MIW) delay line is presented. The working principle is the following: a reader sends a pulse in the time domain to the sensor, which produces a backscattered pulse whose amplitude depends on the temperature. The transductor element is a conventional thermistor, which is placed at the end of the MIW delay line. The system operates at 2.55 GHz and, thus, both the thermistor and the sensor are characterized at this frequency. In order to do that, a setup capable of controlling and measuring the temperature and the frequency or time responses is proposed. The fabricated sensor is measured at different temperatures obtaining good agreement with the simulations. The integrity of sensor response after heating is also proved. The proposed sensor is implemented in single-layer printed technology, resulting in a low-cost and low-complexity solution with reduced dimensions.
ISSN:1530-437X
1558-1748
DOI:10.1109/JSEN.2016.2606768