Portable wireless unit
US6856819B2 · kind B2 · utility
36Cited by
3References
4Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 7, 2001 |
| Grant date | Feb 15, 2005 |
| Priority date | — |
| Expiry date | Jan 7, 2023 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01Q9/0421
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A portable wireless unit of the invention has a first plane antenna smaller than an antenna size determined by a desired frequency, and a second plane antenna presenting an antenna size determined by the desired frequency on the whole by coupling with the first plane antenna.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.