Cross polarization conversion and RCS reduction using venus-like metallic resonators

This paper presents the design of low backscattered non-absorptive reflective surface at W-band. The presented non-absorptive reflective surface is designed based on cross-polarization conversion principle in which a simple geometry copper unit cell of Venus-like shape is used to compose the surface. The unit cell has three plasmon resonance frequencies at about 96GHz, 97.4GHz, and 99GHz. The unit cell can convert the incident x-or y-polarized EM-waves to their orthogonal components with more than 90% cross-polarization conversion efficiency from about 95.7GHz to 99.3GHz. Moreover, if the proposed unit cell along with its mirrored unit cell are precisely designed and randomly distributed across the surface aperture and arranged in 2D lattice, then 180^o±30^o of reflection phase difference (cancellation) is valid and a low-level backscattered diffuse radar cross sction patterns can be obtained.