A novel low profile circularly polarized Fabry-Perot Resonator (CP-FPR) array of 2×2 elements consisting of the CP-FPR antenna with a linearly polarized feed is presented. The proposed CP-FPR antenna consists of a primary radiator aligned along 45°with linear polarization, a partially reflective surface formed by cross-slot FSS and a nonstandard AMC acting as reflective ground plane. The profile of antenna can also be reduced to a quarter of a wavelength. The array with a compact sequential rotation feeding scheme was optimized to minimize grating lobes and reduce the sidelobe level, even though the element spacing was about two wavelengths. The measured common bandwidth is about 7.4%.
展开▼
