Polarization Constraints in Dual-Polarized Phased Arrays Derived From an Infinite Current Sheet Model

Infinite current sheet radiator represents a phenomenological model of phased array antenna that exhibits formally simple but very general physics of array radiation. In this work, two superimposed, orthogonally directed infinite current sheet radiators are combined to synthesize arbitrary polarized scanned beams. The theory developed reveals principal physical constraints on polarization purity of this ideal phased array and indicates scan-adaptive amplitude and phase control conditions to mitigate polarization distortions as demonstrated for circular and slant linear polarization modes.