초록 ▼

A multibeam antenna system in which an antenna aperture element is deliberately selected to produce a divergent beam at a desired angular beamwidth. The antenna aperture may, for example, take the form of a hyperboloid reflector, a diverging lens, or a defocused paraboloid reflector. For the diverge

A multibeam antenna system in which an antenna aperture element is deliberately selected to produce a divergent beam at a desired angular beamwidth. The antenna aperture may, for example, take the form of a hyperboloid reflector, a diverging lens, or a defocused paraboloid reflector. For the divergent secondary beams produced in these configurations, the angular beamwidth may be conveniently controlled by varying the mangification of the aperture or the degree of defocusing, without significantly affecting the gain or efficiency of the system. The degree of beam overlap may be independently controlled by scaling the size of the aperture, without significantly affecting the beamwidth, the gain or the efficiency.

대표청구항 ▼

A multibeam antenna system, comprising: a single antenna aperture element for producing a plurality of secondary beams of radiation from an equal plurality of primary beams of radiation impinging on said aperture element; and a plurality of antenna feed horns positioned in an array to produce the pl

A multibeam antenna system, comprising: a single antenna aperture element for producing a plurality of secondary beams of radiation from an equal plurality of primary beams of radiation impinging on said aperture element; and a plurality of antenna feed horns positioned in an array to produce the plurality of primary radiation beams; wherein said aperture element and said antenna feed horns are configured to be non-focused, the degree of non-focusing and the aperture size of said feed horns being selected to maximize the gain of the antenna system and to produce the secondary radiation beams as diverging beams with a desired beamwidth at a specified power level; and wherein the diameter of said antenna aperture element is adjusted to provide an overlap of the secondary radiation beams that produces contiguous coverage of an area by the secondary radiation beams at the specified power level, while maintaining the degree of non-focusing and the aperture size of said feed horns to preserve the maximized gain of the antenna system and the beamwidth of the secondary radiation beams.