Sparse array antenna
US6351243B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 8, 2000 |
| Grant date | Feb 26, 2002 |
| Priority date | — |
| Expiry date | Sep 8, 2020 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01Q21/061
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
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≈&lgr;) without generating grating lobes in visible space for the obtained main lobe, and maintaining about half a wavelength spacing in a horizontal direction (dx≈0.48&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 (dy≈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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.