Synthesis of circularly polarized radiation by inphase crossed impedance wire dipoles with screen

The 3D vector problem of diffraction of the field of the system of synphasely excited crossed half-wave wire dipoles of similar geometrical sizes, but with different surface impedances, and located parallel to the perfectly conducting rectangular screen, has been solved. On the base of the uniform geometric diffraction theory method with using the asymptotical expression for a current of an impedance wire dipole located over a perfectly conducting plane the fast active algorithm has been developed for computations. The surface impedances of inphase wire dipoles which ensure formation of the circularly polarized wave in the normal direction to the screen depending on the dipole's removal from the screen and on the screen dimensions have been found.