Antenna device for radar-based level gauging
US6859166B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Dec 4, 2002 |
| Grant date | Feb 22, 2005 |
| Priority date | — |
| Expiry date | Dec 4, 2022 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01Q21/0043
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
An antenna device in a radar-based level gauge mounted at an opening in a roof of a tank, the antenna device comprising at least one elongated radiating structure, which has a length that is substantially larger, preferably more than 3-5 times longer, than a maximum cross-sectional length dimension of the opening; is oriented in a non-vertical position; and is configured and fed to produce an essentially vertical radiation beam directed downwards in the tank. Preferably, the antenna device is foldable and is inserted into the tank through the opening and oriented in the non-vertical position by means of folding the radiating structure.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.