Patent ID: 6061032
Filing Date: 2000-05-09
Classification: H01Q

Abstract:
A dual polarized antenna device for wireless transmission of information using electromagnetic signals of a first and a second polarization, which two polarizations are orthogonal to each other, comprising at least one antenna plane with at least one antenna element, and at least one ground plane made from a first electrically conducting layer, at least one feeder network made from a second electrically conducting layer, and a plurality of apertures in the ground plane, wherein each aperture includes at least one aperture section and extends between two end points; the apertures are arranged in aperture groups; each aperture group is symmetrical relative to planes defined by the two polarizations and comprises at least one first aperture, which is centrally located in the group and is intended for the first polarization, and at least two outer apertures, which are intended for the second polarization and are symmetrically positioned on one side each of the first aperture; and a distance along a straight line between the end points of at least one of the apertures along an axis parallel to a main direction of the aperture is smaller than a sum of the lengths of the aperture sections in the aperture.