Thickness variation study of RFID-based folded patch antennas for strain sensing

Xiaohua Yi, Terence Wu, Gabriel Lantz, Yang Wang, Roberto T. Leon, Manos M. Tentzeris

    Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

    7 Citations (Scopus)

    Abstract

    This paper explores folded patch antennas for the development of low-cost and wireless smart-skin sensors that monitor the strain in metallic structures. When the patch antenna is under strain/deformation, its resonance frequency varies accordingly. The variation can be easily interrogated and recorded by a wireless reader that also provides power for the antenna operation. The patch antenna adopts a specially selected substrate material with low dielectric constant, as well as an inexpensive off-the-shelf radiofrequency identification (RFID) chip for signal modulation. A thicker substrate increases RFID signal-to-noise ratio, but reduces the strain transfer efficiency. To experimentally study the effect of substrate thickness, two prototype folded patch antennas with different substrate thicknesses have been designed and manufactured. For both prototypes, tensile testing results show strong linearity between the interrogated resonance frequency and the strain experienced by the antenna. Longer interrogation range is achieved with the larger substrate thickness.

    Original languageEnglish
    Title of host publicationSensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems 2011
    Volume7981
    DOIs
    Publication statusPublished - 2011
    Publication typeA4 Article in a conference publication
    EventSensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems 2011 - San Diego, CA, United States
    Duration: 7 Mar 201110 Mar 2011

    Conference

    ConferenceSensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems 2011
    Country/TerritoryUnited States
    CitySan Diego, CA
    Period7/03/1110/03/11

    Keywords

    • folded patch antenna
    • passive wireless sensor
    • RFID
    • strain sensor
    • substrate thickness

    ASJC Scopus subject areas

    • Applied Mathematics
    • Computer Science Applications
    • Electrical and Electronic Engineering
    • Electronic, Optical and Magnetic Materials
    • Condensed Matter Physics

    Fingerprint

    Dive into the research topics of 'Thickness variation study of RFID-based folded patch antennas for strain sensing'. Together they form a unique fingerprint.

    Cite this