AI Article Synopsis

  • An advanced microwave sensor using a complementary symmetric S shaped resonator (CSSSR) is designed to assess the dielectric properties of low-permittivity materials, showcasing high sensitivity and unique sensing capabilities.
  • Electromagnetic simulations reveal how various material characteristics (like permittivity and loss tangents) influence the sensor's resonance frequency and measurement accuracy.
  • Experimental results confirm the design's effectiveness, showing a differential sensitivity range of 102% to 95% for relative permittivity changes, with a minimal error of less than 0.5% between simulated and actual measurements.

Article Abstract

In this paper, an extremely sensitive microwave sensor is designed based on a complementary symmetric S shaped resonator (CSSSR) to evaluate dielectric characteristics of low-permittivity material. CSSSR is an artificial structure with strong and enhanced electromagnetic fields, which provides high sensitivity and a new degree of freedom in sensing. Electromagnetic simulation elucidates the effect of real relative permittivity, real relative permeability, dielectric and magnetic loss tangents of the material under test (MUT) on the resonance frequency and notch depth of the sensor. Experiments are performed at room temperature using low-permittivity materials to verify the concept. The proposed design provides differential sensitivity between 102% to 95% as the relative permittivity of MUT varies from 2.1 to 3. The percentage error between simulated and measured results is less than 0.5%. The transcendental equation has been established by measuring the change in the resonance frequency of the fabricated sensor due to interaction with the MUT.

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Source
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7180479PMC
http://dx.doi.org/10.3390/s20071916DOI Listing

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