Patent ID: 6529090
Filing Date: 2003-03-04
Classification: H01P

Abstract:
A balun component structural subassembly for use in connection with an antenna radome assembly, comprising:a printed circuit board substrate having a longitudinal axis, and a pair of opposite side surfaces; a coaxial feed point electrically connected to a first one of said pair of opposite side surfaces of said printed circuit board substrate for feeding incoming signals onto said printed circuit board substrate; a first ground plane disposed upon said first one of said pair of opposite side surfaces of said printed circuit board substrate and electrically connected to said coaxial feed point; a first transformer disposed upon said first one of said pair of opposite side surfaces of said printed circuit board substrate, electrically connected to said first ground plane of said printed circuit board substrate, and extending in a predetermined direction so as to terminate in a first balun tip antenna connection line; a second ground plane disposed upon a second one of said pair of opposite side surfaces of said printed circuit board substrate and electrically connected to said first ground plane disposed upon said first one of said pair of opposite side surfaces of said printed circuit board substrate; a second transformer disposed upon said second one of said pair of opposite side surfaces of said printed circuit board substrate, electrically connected to said second ground plane of said printed circuit board substrate, and extending in said predetermined direction so as to terminate in a second balun tip antenna connection line; said first ground plane and said first transformer disposed upon said first one of said pair of opposite side surfaces of said printed circuit board substrate being disposed in an anti-symmetric manner with respect to said second ground plane and said second transformer disposed upon said second one of said pair of opposite sides of said printed circuit board substrate and in a 180Â° out-of-phase manner such that the entire balun component structural subassembly exhibits diametrical symmetry with respect to and around said longitudinal axis of said printed circuit board substrate such that the antenna radome assembly can achieve well-behaved and unsquinted amplitude and phase patterns regardless and independent of polarization in order to reduce angle of arrival (AOA) errors to the antenna radome assembly.