Portable telephone
US6745057B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Apr 19, 2000 |
| Grant date | Jun 1, 2004 |
| Priority date | — |
| Expiry date | Apr 19, 2020 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01Q15/14
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
The portable telephone includes an antenna and a metallic cabinet operating as main radiation sources of electromagnetic waves, a feeding point for supplying said antenna and said metallic cabinet with electric power, an outer packaging formed of such a material as plastics or resin, and a reflecting plate for reflecting the electromagnetic waves radiated from said radiation sources, the reflecting plate being provided for increasing the amount of the electromagnetic waves radiated into a free space when the portable telephone is in use, being selectively arranged at a position where an electric field component or a magnetic field component of the electromagnetic waves radiated from said radiation sources is dominant, and having an electric constant which enables effective reflection of said magnetic field component or said electric field component and causes little electric power absorption.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.