Radio communication base station antenna
US6369774B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Feb 9, 2001 |
| Grant date | Apr 9, 2002 |
| Priority date | — |
| Expiry date | Feb 9, 2021 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01Q21/10
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
The antenna comprises several primary sources (6A-6C) fed independently and arranged to have different radiation characteristics. These primary sources are placed in a first medium (7A-7C) so as to be spatially decoupled. A second medium (8A-8C), of a characteristic impedance substantially lower than the first medium covers the first medium. Each primary source has a direction of focus (A-C) perpendicular to the interface between the first and second media, along which the distance (d1) between said primary source and said interface is &lgr;1.(2p1−1)/4 and the second medium has a thickness (e2) equal to &lgr;2.(2p1−1)/4, where &lgr;1 and &lgr;2 denote the wavelengths radiated by said primary source in the first and second media, respectively, and p1 and p2 are integers.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.