Antenna device and radio communication system
US7786943B2 · kind B2 · utility
3Cited by
2References
17Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jul 24, 2008 |
| Grant date | Aug 31, 2010 |
| Priority date | — |
| Expiry date | Nov 20, 2028 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01Q7/00
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
An antenna device includes: a substrate; first and a second antenna units which are wound coaxially on a surface of the substrate, and include a plurality of antenna elements; and a feeder which feeds power only to the first antenna unit. A separation distance between the antenna elements in each of the first and second antenna units is substantially the same.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.