Patent ID: 7808439
Filing Date: 2010-10-05
Classification: H01P,H01Q

Abstract:
1. A substrate integrated waveguide array antenna for transmitting and receiving signals, said substrate integrated waveguide array antenna comprising: a substrate fabricated from a low loss dielectric material, said substrate having a top surface and a bottom surface, said top surface and said bottom surface having a metal plating; an array of radiating waveguide elements integrated with said substrate, each radiating waveguide elements comprising a plurality of substantially linearly-aligned cross-slots through said metal plating of said top surface, a first waveguide sidewall running parallel to said plurality of cross-slots, and a second waveguide sidewall running parallel to said plurality of cross-slots, said first waveguide sidewall and said second waveguide sidewall being on opposite sides of and spaced-apart from said plurality of cross-slots, said first waveguide sidewall being spaced apart from said second waveguide sidewall by a selected distance, said first waveguide sidewall and said second waveguide sidewall comprising a plurality of waveguide sidewall vias through said substrate, each of said waveguide sidewall vias being metal-lined, said waveguide sidewall vias being spaced-apart from each other, each said cross-slot within said plurality of substantially linearly-aligned cross-slots being spaced apart from neighboring said cross-slots to produce circular polarization at a selected tilt-angle when excited; and a binary feeding network integrated with said substrate, said binary feeding network having a plurality of outputs, each output of said plurality of outputs being coupled to one radiating waveguide element of said array of radiating waveguide elements, said binary feeding network comprising a plurality of feed sidewalls forming junctions adapted to divide the power of transmitted signals and to combine the power of received signals, said plurality of feed sidewalls forming a series of cooperating pairs of feed sidewalls spaced apart from each other by a selected distance, each said feed sidewall comprising a plurality of feed sidewall vias through said substrate, each said feed sidewall via being metal-lined, each said feed sidewall via being spaced-apart from neighboring feed sidewall vias in said feed sidewall.