Flower-Shaped Resonator-Based Triple-Band Ideal Metamaterial Absorber with Incident and Polarization Angle Independent for Sensing Application

The triple-band ideal metamaterial absorber with incidence and polarization angle independence for sensing applications in the form of a flower has been proposed. The ideal metamaterial absorber (MMA) and the Rogers RO4003C dielectric substrate with a diameter of 0.58 mm are put between the top metal patch, the middle sensor layer, the bottom copper ground, and the four layers that comprise this concept. The three perfect absorption peaks occurred at frequencies of 5.4281 GHz, 8.5963 GHz, and 14.32 GHz, respectively, with absorbance values of about 99.867%, 99.985%, and 99.96%. The design’s guiding principles and maximum absorption have been determined by observing the electromagnetic properties involving the flowing surface current. The ideal MMA can reach maximum absorbance at incidence angles up to 80° and for polarization-independent coefficients of 0, 45, 90, 135, and 180°. The ideal MMA-based sensors, such as pressure, moisture, and density, are presented in this study in several noteworthy applications. The sensing capability has been particularly concentrated on resonance frequency, especially in frequency ranges where resonance transitions evenly or is non-sequentially dependent on differences in pressure, moisture, and density.