Title:
【発明の名称】疎アレイ・アンテナ
Document Type and Number:
Japanese Patent JP2003509885
Kind Code:
A
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 (dy≈lambd) without generating grating lobes in visible space for the obtained main lobe, and maintaining about half a wavelength spacing in a horizontal direction (dx≈0.48lambd). 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 (dy≈1.25lambd-2lambd) 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.
Inventors:
Delneryed, Andels
Johannison, Bjorn, Gunnar
Johannison, Bjorn, Gunnar
Application Number:
JP2001522628A
Publication Date:
March 11, 2003
Filing Date:
September 06, 2000
Export Citation:
Assignee:
Telefon Acty Boraget Elm Ericson (Pubble)
International Classes:
H01Q3/40; H01Q1/24; H01Q3/26; H01Q21/06; H01Q25/00; (IPC1-7): H01Q3/40; H01Q21/06
Domestic Patent References:
| JPH08204428A | 1996-08-09 | |||
| JP2003198437A | 2003-07-11 | |||
| JPH04278703A | 1992-10-05 | |||
| JPH06326510A | 1994-11-25 |
Foreign References:
| US3803625A | 1974-04-09 |
Attorney, Agent or Firm:
Akira Asamura (3 outside)