Antenna for portable radio communication device and method of transmitting radio signal
US6597320B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Sep 6, 2001 |
| Grant date | Jul 22, 2003 |
| Priority date | — |
| Expiry date | Sep 6, 2021 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01Q1/44
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
An antenna for a portable radio communication device is constructed with a conductive shield plate provided in a casing made of resin and shaped to be worn on a human body. The shield plate is capacitively coupled with a part of the human body to operate as an antenna element. A conductive cover of a battery is disposed in the casing to operate as the other antenna element. The antenna elements thus form an electric field-type dipole antenna. The conductive cover of the battery may also be capacitively coupled with the other part of the human body, so that the antenna operate as a loop antenna which uses the human body. The electric field-type antenna may be combined with a magnetic field-type antenna to make the directivity of the antenna to be isotropic.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.