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.

Alibakhshikenari M., Virdee B.S., Elwi T.A., Lubangakene I.D., Jayanthi R.K.R., Al-Behadili A.A., et al. (2023). Design of a Planar Sensor Based on Split-Ring Resonators for Non-Invasive Permittivity Measurement. SENSORS, 23(11) [10.3390/s23115306].

Design of a Planar Sensor Based on Split-Ring Resonators for Non-Invasive Permittivity Measurement

Livreri P.;
2023-06-02

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.
2-giu-2023
Settore ING-INF/01 - Elettronica
Alibakhshikenari M., Virdee B.S., Elwi T.A., Lubangakene I.D., Jayanthi R.K.R., Al-Behadili A.A., et al. (2023). Design of a Planar Sensor Based on Split-Ring Resonators for Non-Invasive Permittivity Measurement. SENSORS, 23(11) [10.3390/s23115306].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10447/599893
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