Novel FSS-Based Sensor for Concurrent Temperature and Strain Sensing
Frequency selective surfaces (FSSs) are periodic arrays of conductive elements (or patches). When illuminated with electromagnetic energy, FSSs have specific reflection and/or transmission properties including resonant frequency, Q-factor, etc. Since the FSS response is sensitive to changes in FSS geometry and dielectric properties (local to the FSS), FSS-based sensors have strong potential for a variety of sensing applications including strain and temperature. In this paper, a new FSS-based sensor, capable of concurrent temperature and (unidirectional) strain sensing, is presented. This sensor is based on the cross-loop FSS and includes two different sizes of cross-loop elements. In this way, the FSS sensor response features two different resonant frequencies. In order to utilize changes in one resonant frequency for temperature sensing and changes in the other resonant frequency for strain sensing, each resonant frequency must be affected by only one sensing parameter. This design constrain was accomplished by selective placement of a temperature sensitive dielectric on the larger cross-loop elements, making the lower resonant frequency sensitive to temperature, and through utilizing a properly polarized interrogation signal (with respect to the strain direction) such that the upper resonant frequency is sensitive to strain.
M. Mahmoodi and K. M. Donnell, "Novel FSS-Based Sensor for Concurrent Temperature and Strain Sensing," Proceedings of the 2017 IEEE Antennas and Propagation Society International Symposium (2017, San Diego, Ca), vol. 2017-January, pp. 679-680, Institute of Electrical and Electronics Engineers (IEEE), Jul 2017.
The definitive version is available at https://doi.org/10.1109/APUSNCURSINRSM.2017.8072382
2017 IEEE International Symposium on Antennas and Propagation and USNC-URSI Radio Science Meeting, APSURSI 2017 (2017: Jul. 9-14, San Diego, CA)
Electrical and Computer Engineering
Keywords and Phrases
Dielectric properties; Electromagnetic wave absorption; Electromagnetic wave polarization; Electromagnetic waves; Frequency selective surfaces; Q factor measurement; Temperature sensors; Cross-loop; Frequency selective surface (FSSs); Frequency-sensitive; Interrogation signal; Sensing applications; Temperature and strain sensor; Temperature sensitive; Transmission property, Natural frequencies; Concurrent temperature and strain sensor; Cross loop FSS.; Frequency selective surface; FSS-based sensor
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Article - Conference proceedings
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01 Jul 2017