Survey of aerials and aerial distribution techniques in the h.f. fixed service

Abstract

the Fraunhofer-zone value. The same conclusion applies to the uniformly illuminated rectangular aperture. It thus appears that the maximum power that can be transferred by the uniformly illuminated aperture without moving closer than the Fresnel zone is slightly greater than 60%.Reference to Fig. 6 shows that, for 0-5 < S < 0-9,