Antenna
US6448931B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 27, 2000 |
| Grant date | Sep 10, 2002 |
| Priority date | — |
| Expiry date | Nov 27, 2020 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01Q9/0421
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
An antenna includes a grounding plate and a plurality of radiator elements in rectangular shape. The elements are disposed on the grounding plate with its one end being electrically coupled to the grounding plate. Longitudinal lengths of the elements are set within a range of &lgr;/8-3&lgr;/8 so that working frequencies are adjusted at given frequencies. Accordingly, this one antenna can transmit and receive frequencies in a desired frequency band. A coupler is disposed between the plurality of elements, and only one element is fed with power, while the other elements are fed indirectly, so that numbers of feeding points and feed lines are reduced. Further, a distance between the grounding plate and the elements is adjusted to a 0.5-3 inch range, whereby a thin and low antenna is obtainable.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.