Grid antennas and methods with efficient grid spacing
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United States of America Patent
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Feb 13, 2001
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app pub date -
Jun 24, 1999
filing date -
Jun 24, 1999
priority date (Note) -
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Abstract
Paraboloidal grid reflectors and antennas are provided which are lighter and have less wind loading because they efficiently realize selected front-to-back ratios by recognizing the angular distribution in typical differential path losses and feed gains. In particular, the reflectors are formed with adjacent pairs of parallel elongate members that are positioned at respective angles .theta. from the paraboloidal vertex and spaced apart by respective spaces S that generally increase with increased angle .theta.. In some reflector embodiments, the spaces S increase with increased angle .theta. for a contiguous majority of adjacent pairs and may be constant for a contiguous minority that typically adjoins the vertex. In other reflector embodiments, the spaces S increase with increased angle .theta. for all of the adjacent pairs.
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