Patent ID: 6473054
Filing Date: 2002-10-29
Classification: H01Q

Abstract:
An array antenna, to provide sector coverage with a radiation pattern notch at a selected angle (&THgr;) within the sector, comprising:a horizontal linear array of radiating elements including at least one left-side element and at least one right-side element, all left-side elements arranged for nominally opposite-phase excitation relative to all right-side elements; a power divider/combiner; and left and right coupling lines respectively coupled between the power divider/combiner and the left-side and right-side elements, including a left coupling line having a line-length differential (LL-LR) relative to a right coupling line, said line-length differential selected to provide a phase differential between excitation of left-side and right-side elements to modify said nominally opposite-phase excitation to produce said radiation pattern notch at the selected angle (&THgr;), relative to array boresight.