AERIAL Russian patent published in 1996 - IPC

FIELD: aerial equipment. SUBSTANCE: invention is meant for use in ground-based satellite TV system with simultaneous increase of gain factor and simplified tuning process. Aerial includes spherical lens 1 of central symmetry and aerial feeds 6 located on spherical surface concentric on spherical lens. The lens is anchored by means of arc holder 3 in its polar points 2 on support 7. Azimuthal and elevation angle guides 4 and 5 fabricated in the form of sections of arcs are mounted for movement along holder 3 and relative to each other. Each elevation angle guide 5 carries feed 6 mounted for movement along direction towards center of spherical lens 1, for turning about its own axis and for fixation. Axis of spherical lens 1 passes through polar attachment points 2 and makes with local vertical line angle α≃ 1/2(90-Φ-9,2 sin Φ) deg. Length of azimuthal guide 4 is l_az≅ 2R₁ arctg (R₃/R) and length of each elevation angle guide 5 is l_an= 0,2 R₂, where Φ is latitude of installation point of aerial; R is radius of spherical lens 1 of central symmetry; R₁ is radius of azimuthal guide 4, R₂ is radius of elevation angle guide 5; R₃ is distance from phase center of feed 6 to center of spherical lens 1. EFFECT: increased gain factor and simplified tuning process. 3 cl, 1 dwg