2017
DOI: 10.2528/pierc17031309
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Sensitivity Modeling of a Strain-Sensing Antenna

Abstract: Abstract-A quarter-wavelength folded patch antenna is adopted as the passive wireless strain sensor for structural health monitoring (SHM) of bridges. It can be used for continuous surveillance and damage detection. According to theoretical formulations, strain simulation and experiments, it is found that a good linearity relationship can be achieved between normalized resonance frequency shift and the strain both in longitudinal and transverse directions. And the sensing sensitivity in longitudinal strain is … Show more

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Cited by 8 publications
(2 citation statements)
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“…The relationship between the normalized resonant frequency change and micro‐strain is plotted in Figure 3, where the linear relationship between the resonant frequency shift and strain with sensitivities of −0.9468 ppm/με and 0.9857 ppm/με were obtained. These values agree with previous results presented in 11‐15 . In addition to the low sensitivity, LP patch sensors have inherent disadvantage of single direction strain monitoring and thus work appropriately, if and only if the strain direction is known beforehand.…”
Section: Linearly Polarized Patch Antenna Sensorsupporting
confidence: 91%
See 1 more Smart Citation
“…The relationship between the normalized resonant frequency change and micro‐strain is plotted in Figure 3, where the linear relationship between the resonant frequency shift and strain with sensitivities of −0.9468 ppm/με and 0.9857 ppm/με were obtained. These values agree with previous results presented in 11‐15 . In addition to the low sensitivity, LP patch sensors have inherent disadvantage of single direction strain monitoring and thus work appropriately, if and only if the strain direction is known beforehand.…”
Section: Linearly Polarized Patch Antenna Sensorsupporting
confidence: 91%
“…Otherwise, the LP‐patch sensor may not function properly due to being impervious to the change in patch width 6‐10 . More seriously, the LP‐patch sensor has an inherent disadvantage that its maximum sensitivity is limited by 1 ppm/με 11‐16 . This is because the resonant frequency of LP patch antenna is much more affected by the change in patch (resonant) length than in its width.…”
Section: Introductionmentioning
confidence: 99%