Abstract
Metamaterials are attractive media for scientific society for their potential multi-functional and a wide range of applications due to their unusual electromagnetic properties. In this paper, we present several important applications including pressure, density and volumetric moisture sensing based on rectangular split ring structure with a strip line. These applications are carried out experimentally and numerically. Since the sensing ability is mostly connected with the resonance frequencies, we have carefully selected a frequency range where the resonance shifts occur linearly depending on the pressure and the density of the medium or material to be tested. The proposed model can be used for chemical, agricultural, medical and biological sensing applications in the microwave frequency band. The model is composed of a split ring resonator (SRR) topology and the sensing layer sandwiched between the SRR and a rectangular copper layer located at the background. Middle-sensing layer changes its dielectric behavior linearly depending on the pressure and the density allowing us to determine the unknown values of these parameters.
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