Device in antenna units

Details Device in antenna units Device in antenna units

1998-02-13

2000-05-09

Wong, Don

Communications: radio wave antennas

Antennas

Slot type

343700MS, 343767, H01Q 1310

Patent

active

060610328

ABSTRACT:
Dual polarized antenna device for wireless transmission of information using electromagnetic signals with polarizations orthogonal to each other, 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 said ground plane, which apertures each consist of one or several aperture sections, and which extend between two end points, which apertures are arranged in at least one aperture group, with each aperture group being symmetrical relative to the planes which are defined by the two polarizations, and with each aperture group consisting of at least one first aperture, which aperture is centrally positioned in the group and is intended for the first polarization, and at least two outer apertures intended for the second polarization, symmetrically positioned on each side of the central aperture with the distance along a straight line between the end points of at least one of the apertures along an imagined line parallel to the main direction of the aperture being less than the total sum of the lengths of the sections of the aperture.

REFERENCES:
patent: 3550141 (1970-12-01), Harris et al.
patent: 4903033 (1990-02-01), Tsao
patent: 4916457 (1990-04-01), Foy et al.
patent: 4929959 (1990-05-01), Sorbello et al.
patent: 5241321 (1993-08-01), Tsao
patent: 5510803 (1996-04-01), Ishizaka et al.
patent: 5534877 (1996-07-01), Sorbello et al.
patent: 5798734 (1998-08-01), Ohsuka et al.

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