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公开(公告)号:USH514H
公开(公告)日:1988-08-02
申请号:US19836
申请日:1987-02-27
摘要: A compact range for testing antennas or radar targets includes a source for directing energy along a feedline toward a parabolic reflector. The reflected wave is a spherical wave with a radius dependent on the distance of the source from the focal point of the reflector.
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公开(公告)号:US5208599A
公开(公告)日:1993-05-04
申请号:US751419
申请日:1991-08-28
CPC分类号: H01Q17/008 , G01R29/105
摘要: Electromagnetic absorber having serrations on a surface or surfaces thereof to reduce reflectivity of incident electromagnetic waves thereon. The serrations form a plurality of fins, the height of adjacent fins being spaced by a small distance. Preferably the total absorber wedge height is greater than about 1 wavelength at the lowest design frequency and the height between the serration tips is less than 1/4 wavelength at the lowest design frequency.
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