Varactor-loaded dual-polarized unit-cell for reconfigurable reflectarrays

This paper presents a novel varactor-load radiating element for reconfigurable reflectarray. The unit-cell for reflectarray consists of patch groups integrated with varactors and the circuitry for DC biasing voltage control. The proposed unit-cell can generate the dual-polarized tunable reflection thanks to the wide reflected phase tuning range, resonant frequencies shift and the symmetry in the structure. The performance has been evaluated by full wave simulations, and the detailed results are demonstrated and discussed.