A spatially reconfigured polarization converting metasurface for enhanced radar cross section reduction

Polarization converting metasurfaces (PCMSs) have emerged as promising platforms for multifunctional electromagnetic (EM) devices due to their ability to manipulate polarization and suppress radar cross section (RCS). This work proposes a PCM that exhibits efficient linear-to-linear polarization conversion at 3.81 GHz and 6.35 GHz. A single anisotropic meta-atom, when rotated appropriately, enables the implementation of both 1-bit and 2-bit coding metasurfaces without added structural complexity. At resonance frequencies, the 1-bit configuration achieves appreciable RCS suppression as a result of polarization conversion and phase cancellation effects. When the coding arrangement is extended from 1-bit to 2-bit, the metasurface achieves significantly deeper RCS reduction owing to finer phase quantization and improved wavefront manipulation. The results demonstrate that the proposed spatial configuration strategy effectively enhances scattering diffusion while maintaining a simple metasurface design.