US 6,982,676 B2
Plano-convex rotman lenses, an ultra wideband array employing a hybrid long slot aperture and a quasi-optic beam former
Daniel F. Sievenpiper, Santa Monica, Calif. (US); and James H. Schaffner, Chatsworth, Calif. (US)
Assigned to HRL Laboratories, LLC, Malibu, Calif. (US)
Filed on Feb. 06, 2004, as Appl. No. 10/773,942.
Claims priority of provisional application 60/463980, filed on Apr. 18, 2003.
Prior Publication US 2004/0207567 A1, Oct. 21, 2004
Int. Cl. H01Q 19/06 (2006.01)
U.S. Cl. 343—754 25 Claims
OG exemplary drawing
 
1. A multiple slot antenna comprising:
(a) a first plurality of cards defining a plurality of slots therebetween for radiating electromagnetic energy therefrom, each card having conductive material layer disposed on at least one side of a dielectric material layer, the conductive material layer on at least one side of each card in said first plurality of cards forming a plano-convex Rotman lens with a plurality of parallel conductors emanating therefrom;
(b) a second plurality of cards arranged with edges aligned orthogonally to the dielectric material layers in the first plurality of cards, the second plurality of cards each having conductive material formed on at least one side of a planar dielectric element, the conductive material on at least one side of each planar dielectric element of the second plurality of cards forming a convex-convex Rotman lens with a plurality of parallel conductors emanating therefrom; and
(c) the plurality of parallel conductors emanating from the plano-convex Rotman lens on a given card in first plurality of cards mating with one of the parallel conductors emanating from each convex-convex Rotman lens in the second plurality of cards.