Abstract: A small aperture satellite ground station communications antenna is disclosed. A rectangular section of a curved parabolic reflector is provided having first and second rectangular dimensions. An azimuth elevation pedestal for positioning the reflector is provided such that the antenna bore sight is aligned with a geostationary satellite. The reflector is supported by the pedestal to permit rotation of the reflector about a third polarization axis for the antenna. The rotation along the polarization axis permits the reflector to be optimally positioned such that its long dimension is aligned with an orbital arc of a geostationary satellite. Angle scales are provided on all three axes to facilitate repositioning to other satellites based on an initial satellite location, which serves as a reference for the scales.

Abstract: An apparatus for mounting an antenna on a flat roof without penetrating the waterproof membrane of the roof is disclosed herein. The apparatus is comprised of a rigid base having a planar lower surface adapted to overlie the flat roof, ballast means carried by the base to stabilize the base, and antenna support means connected to and extending upwardly from the base.

Abstract: A method of forming articles on an electrically conductive mandrel, and the article produced, is disclosed. Initially, a first layer of metal is electroformed on the mandrel; then alternating electrolessly deposited metal layers of, e.g., two different metals are deposited on the electroformed first layer to form a bi-metallic laminated structure; and then a final layer of metal is electroformed on the laminated structure. The mandrel is then removed to form the article. This method provides a more uniform wall thickness of the final article, even when the mandrel has inner wall portions (e.g., grooves, slots, holes, etc.), as compared with articles formed by conventional electroforming techniques. This method can be used, among other uses, to form corrugated waveguide horns for extremely high frequency applications.