Indhu K K, Abhilash A P, Anilkumar R, Krishna Deepti Das, Aanandan C K
Department of Electronics, Cochin University of Science and Technology, Cochin, 682022, India.
Advanced Centre for Atmospheric Radar Research, Cochin University of Science and Technology, Cochin, 682022, India.
Sci Rep. 2024 Sep 20;14(1):21964. 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 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.
本文提出了一种用于极化和入射角不敏感的雷达散射截面（RCS）缩减应用的超表面设计。一个椭圆形的单元结构被用作极化转换器，然后将其排列成棋盘格表面。虽然单层棋盘格结构能实现宽带RCS缩减，但双层结构可实现与极化和入射角无关的操作。两层的单元结构相互旋转45度。实验结果表明RCS缩减带宽约为90%。此外，随着极化和入射角的变化，RCS缩减保持稳定。
