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A bracket (12) is fixed to the rear surface of a reflector (2). The bracket has a planar plate (14) which, when the bracket is fixed to the reflector, is perpendicular to a polarity axis (16). Plural, spaced-apart arcuate slots (20) arranged on an imaginary circle on the planar plate (14) about the

A bracket (12) is fixed to the rear surface of a reflector (2). The bracket has a planar plate (14) which, when the bracket is fixed to the reflector, is perpendicular to a polarity axis (16). Plural, spaced-apart arcuate slots (20) arranged on an imaginary circle on the planar plate (14) about the polarity axis (16) are formed in the planar plate (14). An adapter plate (24) is disposed in contact with the surface of the planar plate (14) facing the reflector (2). The bracket (12) is rotatable about the polarity axis (16) relative to the adapter plate (24). The adapter plate (24) has screw holes (26) in alignment with the arcuate slots (20) in the planar plate (14). A bracket (28) is disposed on the side of the planar plate (14) opposite to the reflector (2). The bracket (28) has a pair of wings (30, 32). A connecting member (34) is formed integral with the wings (30, 32). The connecting member (34) is perpendicular to the wings (30, 32). The bracket (28) is rotatable about an elevation adjustment axis passing between the wings (30, 32). The bracket (28) has tabs (36, 38, 40). The tabs (36, 38, 40) are adapted to contact the planar plate (14) and provided with respective holes (42, 44, 46). Bolts (48) are inserted through the respective holes (42, 44, 46) and the respective arcuate slots (20) and screwed into the screw holes (26) in the adapter plate (24), whereby the brackets (12, 28) are secured to the adapter plate (24).

대표청구항 ▼

1. A dish antenna rotation apparatus comprising:a dish bracket adapted to be fixed to a rear surface of a dish antenna, said dish bracket including a planar plate having opposing major surfaces which, when said dish bracket is fixed to the rear surface of said dish antenna, lie perpendicular to a po

1. A dish antenna rotation apparatus comprising:a dish bracket adapted to be fixed to a rear surface of a dish antenna, said dish bracket including a planar plate having opposing major surfaces which, when said dish bracket is fixed to the rear surface of said dish antenna, lie perpendicular to a polarity axis, said planar plate having a plurality of arcuate slots formed therein, being spaced from each other on an imaginary circle drawn about said polarity axis on said planar plate; an adapter plate disposed to contact with one of said major surfaces of said planar plate facing said dish antenna and arranged such that said dish bracket can be rotated about said polarity axis relative to said adapter plate, said adapter plate being provided with a plurality engagement portions in alignment with said respective arcuate slots in said planar plate; an elevation bracket disposed on the other of said opposing major surfaces of said planar plate facing away from said dish antenna, including a pair of parallel, spaced-apart wings extending perpendicular to said planar plate, and a connecting member formed integral with said pair of wings, said connecting member extending in parallel with said wings, said elevation bracket being rotatable about an elevation adjustment axis extending between said wings and perpendicular to said wings; said elevation bracket including tabs equal in number to said arcuate slots in said planar plate, said tabs being in contact with said planar plate and being provided with holes in alignment with said arcuate slots; and a plurality of securing members extending through said holes in said tabs and said arcuate slots in alignment with said holes and engaging with said engagement portions of said adapter plate to thereby secure said elevation and dish brackets to said adapter plate. 2. The dish antenna rotation apparatus according to claim 1 wherein said securing members are bolts, said bolts being inserted to extend through said holes in said tabs and said arcuate slots from the elevation bracket side; and said engagement portions are screw holes formed in said adapter plate.3. The dish antenna rotation apparatus according to claim 1 wherein the arrangement for allowing said dish bracket to be rotatable about said polarity axis relative to said adapter plate comprises a projection projecting in alignment with said polarity axis from said one major surface of said planar plate toward said dish antenna, and an opening formed in said adapter plate to receive said projection.4. The dish antenna rotation apparatus according to claim 1 wherein said connecting member is also perpendicular to said planar plate, and said tabs are formed in edges of said wings and connecting member and extend outward from said elevation bracket.