Simplistic metasurface design approach for incident angle and polarization insensitive rcs reduction

• Published in: Scientific reports Vol. 14; no. 1; pp. 21964 - 12
• Main Authors: Indhu, K. K., Abhilash, A. P., Anilkumar, R., Krishna, Deepti Das, Aanandan, C. K.
• Format: Journal Article
• Language: English
• Published: London Nature Publishing Group UK 20-09-2024; Nature Publishing Group; Nature Portfolio
• Subjects: 639/166/987; 639/766/1130; Bandwidths; Checker board reflective surface; Design; Electric fields; Humanities and Social Sciences; Incident angle stability; multidisciplinary; Polarisation conversion ratio; Polarisation insensitive; Polarization; Radar cross section reduction; Radiation; Science; Science (multidisciplinary); Polarisation conversion ratio; Checker board reflective surface; Radar cross section reduction; Polarisation insensitive; Incident angle stability
• ISSN: 2045-2322; 2045-2322
• DOI: 10.1038/s41598-024-72509-6

This paper proposes the design of a metasurface for polarization and incident angle-insensitive RCS reduction applications. An ellipse-shaped unit cell is utilized as a polarization converter, which is then arranged to form a checkerboard surface. While a single layer checkerboard structure gives a wideband RCS reduction, a double layer structure yields polarization and incident angle independent operation. The two layers have unit cells rotated 45
0
to each other. Experimental results demonstrate an RCS reduction bandwidth of around 90%. Further the RCS reduction remains stable with polarization and incident angle variation.