Loop antenna for in the ear audio device
US7450078B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 25, 2007 |
| Grant date | Nov 11, 2008 |
| Priority date | — |
| Expiry date | Jan 25, 2027 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R2420/07
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
The invention regards a communication device which is adapted for placement in a users ear and comprises a shell part enclosing an input transducer for receiving an input signal, a signal processing device and an output transducer for providing a signal perceivable as sound, a battery located at a surface part of the shell which is facing away from the head of the user, a transmission and reception circuit for transmission and/or reception of electromagnetic energy, and where an antenna for radiating and/or receiving electromagnetic energy is arranged with a first surface turned towards the surroundings and a second surface located in close proximity of the battery whereby the antenna forms a loop with a loop axis pointing away from the ear and head, whereby the loop material has a wider extension in the direction of the loop axis than in the direction perpendicular to the loop axis.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.