초록 ▼

An improved dome antenna system wherein compensation for cross polarized signal components in a received difference pattern of the feed array of the system is accomplished with a second array cross polarized to the feed array. This second array is density tapered to establish an aperture distributio

An improved dome antenna system wherein compensation for cross polarized signal components in a received difference pattern of the feed array of the system is accomplished with a second array cross polarized to the feed array. This second array is density tapered to establish an aperture distribution function that is substantially equal to the aperture distribution function of the feed array. Weighting factors, programmed as a function of the boresight scan angle, are applied to the output signals of this second array and the weighted signals are subtracted from the difference signals of the feed array.

대표청구항 ▼

In an antenna of the type including a non-planar lens positioned in the field of a planar scannable antenna for modifying the scanning properties thereof, the planar scannable antenna having a plurality of elements, a planar array aperture, a planar array aperture distribution function, and at least

In an antenna of the type including a non-planar lens positioned in the field of a planar scannable antenna for modifying the scanning properties thereof, the planar scannable antenna having a plurality of elements, a planar array aperture, a planar array aperture distribution function, and at least one monopulse difference signal output port, the improvement comprising: a receiving array, having a receiving array aperture and an output port, positioned in cross polarized relationship with said planar scannable antenna; and means coupled to said receiving array output port and to at least one of said difference signal output ports for combining signals at said difference signal output ports with signals at said receiving array output port in a predetermined manner to reduce null filling in said difference signal output ports due to polarization distortion caused by said non-planar lens.