초록 ▼

An enclosed terrestrial antenna system of monocoque construction for receiving television signals from satellites in geostationary orbit. The basic antenna comprises two dish-shaped members having substantially identical configurations, each of which is a surface of revolution. Each member (called a

An enclosed terrestrial antenna system of monocoque construction for receiving television signals from satellites in geostationary orbit. The basic antenna comprises two dish-shaped members having substantially identical configurations, each of which is a surface of revolution. Each member (called a “dish”in the industry) has a central concave parabolic area surrounded by an upstanding frusto-conic rim. One, the antenna dish, has an electromagnetic radiation reflecting surface on the concave side. The other, the cover dish, is substantially transparent to electromagnetic radiation. The cover dish has an opening at the center, along the axis of revolution. The two dishes are secured together, concave face to concave face. A feed mount is secured to the cover dish over the opening and carries the feed assembly in a manner allowing the feed assembly to be moved toward and away from the reflective surface to focus the feed. Suitable ground supports are provided to hold the antenna assembly with the axis of revolution aligned at a selected azimuth and elevation. A cover is provided over the feed assembly, secured to the feed mount or vover dish. Thus, the antenna assembly is fully enclosed and protected from the weather or other outside influences.

대표청구항 ▼

A monocoque antenna dish and cover each having substantially the same overall configuration which is a surface of revolution; said dishes each having a concave center region surrounded by an outwardly extending frusto-conical rim; at least the curved surface of said antenna dish being capable of ref

A monocoque antenna dish and cover each having substantially the same overall configuration which is a surface of revolution; said dishes each having a concave center region surrounded by an outwardly extending frusto-conical rim; at least the curved surface of said antenna dish being capable of reflecting electromagnetic radiation; the curved surface of said cover dish being substantially transparent to selelcted radiation; means for securing said two dishes together in a concave face to face relationship to form a symmetrical antenna assembly; said cover dish having an opening at substantially the center thereof; feed mount means mounted on said cover dish over said opening; at least one feedhorn assembly mounted on said feed mount means; along an axis relative to the curved surface of said antenna dish at a location to receive maximum reflected radiation; and means for moveably supporting the antenna assembly with said axis at an angle to the surface of the earth.