Reception antenna, core, and portable device
US6924767B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 7, 2003 |
| Grant date | Aug 2, 2005 |
| Priority date | — |
| Expiry date | Aug 4, 2023 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01F17/0033
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A reception antenna is formed of a column-profiled ferrite core and three antenna coils, each of which is formed by winding electric wire around the core. Each central axis of the three antenna coils is mutually disposed orthogonally at a barycenter of the core. Each of the three antenna coils is symmetrical with respect to the barycenter. A third antenna coil and each of a first antenna coil and a second antenna coil are overlapped with a space. The first antenna coil and the second antenna coil are overlapped with direct contact, where a starting end of the second antenna and a terminating end (outward end) of the first antenna is connected.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.