Folded reflectarray with dually polarized cells

X-band folded reflectarray (FRA) antenna is designed and implemented. The proposed FRA provides compactness, reliability, broadband with high efficiency. The reflectarray utilizes multilayer patch cells that receive the waves and twist them from vertical to horizontal polarization with the proper phase. Variable microstrip line lengths control the phases of scattering parameters. The FRA is designed at 10 GHz and composed of 19 × 19 elements covering an area of 285 × 285 mm². The FRA is center fed by a cylindrical open cavity excited by a coaxial fed dielectric resonator antenna. A planar broadband polarizer is located at 68 mm from FRA. The FRA provides 42.5% aperture efficiency with 26.85 dB gain at 10 GHz. A frequency band from 9.4-11.1 GHz with a gain better than 26 dB.