Patent ID: 6208308
Filing Date: 2001-03-27
Classification: H01Q

Abstract:
A dual array radar antenna system, comprising:a main radar antenna array comprising a plurality of spaced main antenna radiating elements disposed within an aperture area;a secondary radar antenna array comprising a plurality of secondary antenna radiating elements co-located with said main antenna radiating elements within said aperture area, each of said secondary antenna radiating elements comprising:a dielectric rod antenna element; anda flared notch radiating antenna for feeding electromagnetic signals to and from said dielectric rod element, said flared notch antenna comprising an electrically conductive flare structure defining first and second tapered flare elements and a slot region at a flared notch between the flare elements, and a balun for exciting the slot region, said flared notch antenna free of electrically conductive shielding surrounding said flare structure; andwherein the dielectric rod includes a first end, and said first end is secured within said flared notch so that the dielectric rod is fed by signals radiated from the flared notch radiating antenna.