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- Title
Design of a Planar Sensor Based on Split-Ring Resonators for Non-Invasive Permittivity Measurement.
- Authors
Alibakhshikenari, Mohammad; Virdee, Bal S.; Elwi, Taha A.; Lubangakene, Innocent D.; Jayanthi, Renu K. R.; Al-Behadili, Amer Abbood; Hassain, Zaid A. Abdul; Ali, Syed Mansoor; Pau, Giovanni; Livreri, Patrizia; Aïssa, Sonia
- Abstract
The permittivity of a material is an important parameter to characterize the degree of polarization of a material and identify components and impurities. This paper presents a non-invasive measurement technique to characterize materials in terms of their permittivity based on a modified metamaterial unit-cell sensor. The sensor consists of a complementary split-ring resonator (C-SRR), but its fringe electric field is contained with a conductive shield to intensify the normal component of the electric field. It is shown that by tightly electromagnetically coupling opposite sides of the unit-cell sensor to the input/output microstrip feedlines, two distinct resonant modes are excited. Perturbation of the fundamental mode is exploited here for determining the permittivity of materials. The sensitivity of the modified metamaterial unit-cell sensor is enhanced four-fold by using it to construct a tri-composite split-ring resonator (TC-SRR). The measured results confirm that the proposed technique provides an accurate and inexpensive solution to determine the permittivity of materials.
- Subjects
PERMITTIVITY measurement; RESONATORS; DETECTORS; ELECTRIC fields; PERMITTIVITY; MICROSTRIP transmission lines
- Publication
Sensors (14248220), 2023, Vol 23, Issue 11, p5306
- ISSN
1424-8220
- Publication type
Article
- DOI
10.3390/s23115306