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Title: Microstrip patch antenna for simultaneous strain and temperature sensing

Abstract

A patch antenna, consisting of a radiation patch, a dielectric substrate, and a ground plane, resonates at distinct fundamental frequencies that depend on the substrate dielectric constant and the dimensions of the radiation patch. Since these parameters change with the applied strain and temperature, this study investigates simultaneous strain and temperature sensing using a single antenna that has two fundamental resonant frequencies. The theoretical relationship between the antenna resonant frequency shifts, the temperature, and the applied strain was first established to guide the selection of the dielectric substrate, based on which an antenna sensor with a rectangular radiation patch was designed and fabricated. A tensile test specimen instrumented with the antenna sensor was subjected to thermo-mechanical tests. Experiment results validated the theoretical predictions that the normalized antenna resonant frequency shifts are linearly proportional to the applied strain and temperature changes. As a result, an inverse method was developed to determine the strain and temperature changes from the normalized antenna resonant frequency shifts, yielding measurement uncertainty of 0.4 °C and 17.22 μϵ for temperature and strain measurement, respectively.

Authors:
ORCiD logo [1]; ORCiD logo [1]
  1. Univ. of Texas at Arlington, Arlington, TX (United States)
Publication Date:
Research Org.:
Univ. of Texas at Arlington, Arlington, TX (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1495340
Grant/Contract Number:  
FE0023118
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Smart Materials and Structures
Additional Journal Information:
Journal Volume: 27; Journal Issue: 6; Journal ID: ISSN 0964-1726
Publisher:
IOP Publishing
Country of Publication:
United States
Language:
English
Subject:
01 COAL, LIGNITE, AND PEAT; antenna sensor; temperature-compensated; strain sensor; temperature sensor; structural health monitoring; wireless sensor

Citation Formats

Tchafa, F. Mbanya, and Huang, H. Microstrip patch antenna for simultaneous strain and temperature sensing. United States: N. p., 2018. Web. doi:10.1088/1361-665X/aabd47.
Tchafa, F. Mbanya, & Huang, H. Microstrip patch antenna for simultaneous strain and temperature sensing. United States. doi:10.1088/1361-665X/aabd47.
Tchafa, F. Mbanya, and Huang, H. Tue . "Microstrip patch antenna for simultaneous strain and temperature sensing". United States. doi:10.1088/1361-665X/aabd47. https://www.osti.gov/servlets/purl/1495340.
@article{osti_1495340,
title = {Microstrip patch antenna for simultaneous strain and temperature sensing},
author = {Tchafa, F. Mbanya and Huang, H.},
abstractNote = {A patch antenna, consisting of a radiation patch, a dielectric substrate, and a ground plane, resonates at distinct fundamental frequencies that depend on the substrate dielectric constant and the dimensions of the radiation patch. Since these parameters change with the applied strain and temperature, this study investigates simultaneous strain and temperature sensing using a single antenna that has two fundamental resonant frequencies. The theoretical relationship between the antenna resonant frequency shifts, the temperature, and the applied strain was first established to guide the selection of the dielectric substrate, based on which an antenna sensor with a rectangular radiation patch was designed and fabricated. A tensile test specimen instrumented with the antenna sensor was subjected to thermo-mechanical tests. Experiment results validated the theoretical predictions that the normalized antenna resonant frequency shifts are linearly proportional to the applied strain and temperature changes. As a result, an inverse method was developed to determine the strain and temperature changes from the normalized antenna resonant frequency shifts, yielding measurement uncertainty of 0.4 °C and 17.22 μϵ for temperature and strain measurement, respectively.},
doi = {10.1088/1361-665X/aabd47},
journal = {Smart Materials and Structures},
issn = {0964-1726},
number = 6,
volume = 27,
place = {United States},
year = {2018},
month = {5}
}

Journal Article:
Free Publicly Available Full Text
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