Transreflector antenna for wireless communication system
US6965784B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 21, 2002 |
| Grant date | Nov 15, 2005 |
| Priority date | — |
| Expiry date | Aug 24, 2023 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01Q1/425
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A compact lightweight antenna for receiving microwave direct line of sight wireless data signals used in services such as Local Multipoint Distribution Services (LMDS). The antenna provides for precise control over isolation of polarized signals. The antenna consists of an external parabolically shaped dome formed of a suitably resilient material such as thermoplastic. A polarizing conductive grating is formed on the interior surface of the dome and serves as a transreflector for initially passing received radiation having a vertical polarization. A twist reflector disposed at a point along an axis defined by the conductive grating reflects the received radiation, back in the direction of the transreflector with a different polarization. The now differently polarized energy is reflected by the parabolically shaped conductive grating at a feed point located in the center of the twist plate. The transreflecting element may be manufactured by providing a substrate that has been printed and etched and/or a film nonconductive substrate which has been silk screened with a conductive ink. In each of these cases in a preferred embodiment, the substrate or carrier film becomes an integral p…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.