The MMA is polarization insensitive as well as wide incident angle stable. In this article, an MMA is proposed using a metal–insulator–metal (MIM) structure (Ni–SiO 2 –Ni) that shows a near-unity broadband absorption of wavelengths from 300 to 1600 nm, with a 95.77% average absorption and a peak absorption of 99.999% at 772.82 nm. To ensure high absorption of photons, metamaterial absorbers (MMAs) have been a growing area of interest in recent years. The compact size, effective parameters, high sensitivity and a good EMR represent the proposed metamaterial as a promising solution for S-band and C-band microwave sensing applications.īroadband absorbers are required for solar energy harvesting because they efficiently absorb the incident photon in the wide-ranging solar spectrum. For exploring microwave sensing applications of the proposed unit cell, permittivity and pressure sensitivity performance were investigated in different simulation arrangements. The simulated result agrees well with the calculated result. The validity of the proposed structure is confirmed by an equivalent circuit model. Further analysis has been done by changing the thickness of the substrate material as well and a significant change in the effective medium ratio is found. A good effective medium ratio (EMR) of 8.06 indicates the compactness and effectiveness of the proposed design. The proposed structure exhibits transmission resonance inside the S-band with NRI and ENG (Epsilon Negative) metamaterial properties, and inside the C-band with ENG and MNG (Mu Negative) metamaterial properties. Two popular substrate materials of Rogers RO 3010 and FR-4 were adopted for analyzing the characteristics of the unit cell. Thus, the Double-E-Triple-H-Shaped configuration is developed. This double-E-H-shaped design is also encased by two vertical H-shaped structures along with some copper links. Here, a horizontal H-shaped metal structure is enclosed by two face-to-face E-shaped metal structures. This paper presents a new Double-E-Triple-H-Shaped NRI (negative refractive index) metamaterial (MM) for dual-band microwave sensing applications.
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