X-band Γ-shaped anisotropic metasurface-based perfect cross-polarizer for RCS reduction
Priyanka Tiwari, S.K. Pathak, V. Anitha, Varsha Siju, Abhishek Sinha
Abstract
In this paper, an X-band perfect cross-polarization convertor (CPC) that consists of Γ-shaped metal patch imprinted on a metal-backed FR-4 dielectric substrate is designed, analyzed, and characterized. The unit cell dimensions of the developed structure are optimized to achieve more than 99.9% polarization conversion ratio (PCR) for a frequency range of 8–12 GHz (X-band) at normal incidence angle. The performance of device exhibits 80% PCR value as a function of angle of incidence up to 40°. The analytical finding and experimental characteristics of the designed structure agree well with the simulated results. In addition, the developed device has been thoroughly analyzed numerically for radar cross-section (RCS) reduction using phase cancellation techniques which exhibits 10-dB mono-static RCS reduction over a frequency band 7.7 GHz to 13.7 GHz. The developed device is highly suitable for radar stealth applications.