Polarization dependent 1-bit coding metamaterial for radar cross section reduction in microwave frequency applications

Abstract

The main focus of this investigation was the construction of three kinds of distinctive structures, such as conventional coding metamaterial, tailored metamaterial, and combined coding metamaterial designs at lower microwave frequencies. All of the 1-bit coding metamaterial designs imitate coding particles with 0° and 180° phase responses. In order to achieve the appropriate resonance frequencies and phase response features, this work adopted a square split-ring resonator design. The proposed element ‘1′ exhibits resonance frequencies at 1.43, 3.46, 4.41, 5.60, 6.03, and 7.33 GHz respectively. Alongside this, more than 180° phase difference ranges are satisfactorily manifested, likely at 3.10 to 3.67 GHz and 5.58 to 6.43 GHz, respectively. Analysis of each proposed design was carried out in terms of its scattering parameter properties, monostatic Radar Cross-Section (RCS), and bistatic RCS scattering patterns. In essence, different functionality can be attained via a composite metamaterial design with a unique configuration that affects electromagnetic waves.