Antenna apparatus and portable radio set
US6362792B1 · kind B1 · utility
83Cited by
4References
43Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 7, 2000 |
| Grant date | Mar 26, 2002 |
| Priority date | — |
| Expiry date | Aug 7, 2020 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B7/04
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
An antenna that functions as an approximately balanced antenna that is structurally asymmetric but electrically symmetric includes a first antenna element that is extendable and retractable, a second fixed antenna element, an unbalanced transmission line feeding the first and second antenna elements, and a balanced-unbalanced convertor. At a time of extending the first antenna element, the first and second antenna elements are supplied an electric power from the unbalanced transmission line through the balanced-unbalanced convertor, so that the first and second antenna elements cooperate to function as an antenna.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.