11 April 2013 Design and simulation of a slotted patch antenna sensor for wireless strain sensing
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In this work, a slotted patch antenna is employed as a wireless sensor for monitoring structural strain and fatigue crack. Using antenna miniaturization techniques to increase the current path length, the footprint of the slotted patch antenna can be reduced to one quarter of a previously presented folded patch antenna. Electromagnetic simulations show that the antenna resonance frequency varies when the antenna is under strain. The resonance frequency variation can be wirelessly interrogated and recorded by a radiofrequency identification (RFID) reader, and can be used to derive strain/deformation. The slotted patch antenna sensor is entirely passive (battery-free), by exploiting an inexpensive offthe- shelf RFID chip that receives power from the wireless interrogation by the reader.
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Xiaohua Yi, Xiaohua Yi, Chunhee Cho, Chunhee Cho, Benjamin Cook, Benjamin Cook, Yang Wang, Yang Wang, Manos M. Tentzeris, Manos M. Tentzeris, Roberto T. Leon, Roberto T. Leon, "Design and simulation of a slotted patch antenna sensor for wireless strain sensing", Proc. SPIE 8694, Nondestructive Characterization for Composite Materials, Aerospace Engineering, Civil Infrastructure, and Homeland Security 2013, 86941J (11 April 2013); doi: 10.1117/12.2009233; https://doi.org/10.1117/12.2009233

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