Dual-Band Array Antenna.
DEPARTMENT OF THE NAVY WASHINGTON D C
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The patent describes a unitary antenna comprising two different arrays. The first is a group of waveguide antenna elements in alternately displaced rows forming a triangular grid structure and the second is another group of waveguide antenna elements forming a triangular grid structure within the first grid structure. The two groups of elements are dielectrically loaded, are polarized to radiate orthogonally to each other, and are designed to radiate at different frequency bands.
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- Active and Passive Radar Detection and Equipment