Antenna device and radio communication terminal
US7411557B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 8, 2006 |
| Grant date | Aug 12, 2008 |
| Priority date | — |
| Expiry date | Nov 4, 2026 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B7/0825
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A switching unit which switches the sub antenna, which is for performing diversity reception in cooperation with the main antenna for transmission and reception, from functioning as an antenna to functioning as a parasitic element, or from functioning as a parasitic element to functioning as an antenna, is provided; the main antenna and the sub antenna are provided to be spaced a predetermined distance apart so that multiple resonance can be generated by electromagnetic coupling, and the sub antenna is made to function as a parasitic element to generate multiple resonance, widening the frequency band width within which the main antenna can transmit and receive a radio wave.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.