The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 26, 2002
Filed:
Sep. 08, 2000
Anders Derneryd, Göteborg, SE;
Björn Gunnar Johannisson, Kungsbacka, SE;
Telefonaktiebolaget LM Ericsson (publ), Stockholm, SE;
Abstract
An antenna array for a base station for communication systems presenting a sparse element grid in a one-dimensional scanned array or multi-beam array is presented. The element spacing is primarily governed by scanning in a horizontal direction. In a triangular element grid the individual element spacing in a vertical direction is increased to an order of a wavelength (d ≈&lgr;) without generating grating lobes in visible space for the obtained main lobe, and maintaining about half a wavelength spacing in a horizontal direction (d ≈0.48&lgr;). This results in a reduction of radiating elements compared to a square grid of radiating elements arranged with a spacing of half a wavelength. By taking into account and limiting the horizontal scan, the vertical spacing may be further increased (d ≈1.25&lgr;−2&lgr;) to obtain an optimum sparse antenna element grid for a one-dimensional scanned beam or a multi-beam pattern e.g., for a communication system base station.