T. Aftab, A. Yousaf, J. Hoppe, Sebastian Stoecklin, T. Ostertag, L. Reindl
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A parallel plate dielectric resonator as a wireless passive strain sensor
This paper presents a wireless passive strain sensing concept that functions by detuning a dielectric resonator. It is shown how a high Q resonator functions as a wireless passive sensor when correctly matched with an antenna. Finite element and analytical models are compared with experimental data and the sensor cross sensitivity with respect to temperature and humidity are also explored. The sensitivity of the resonance frequency to the strain, temperature and humidity is measured to be 51.6 ppm/μm, 10.09 ppm/K and -0.65 ppm/% respectively.
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