Adapter antenna
US6538607B2 · kind B2 · utility
38Cited by
6References
11Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jul 9, 2001 |
| Grant date | Mar 25, 2003 |
| Priority date | — |
| Expiry date | Jul 9, 2021 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B1/3877
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
An adapter antenna (2) is used for contactless connection of a mobile telephone (1) to an external antenna (4) in case the telephone lacks a connector for coaxial cable (3) for such a purpose. The most common application is when a mobile telephone is to be used in a vehicle. Transfer of radio waves occurs in the near field of the built-in antenna (6) of the telephone by capacitive coupling. One preferred embodiment especially suited for plane inverted antennae of type L, E or F is described. An optimizing method for two frequency bands is described.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.