Antenna device and portable radio communication device comprising such antenna device
US8330665B2 · kind B2 · utility
Inventors
Key dates
| Filing date | Nov 25, 2008 |
| Grant date | Dec 11, 2012 |
| Priority date | — |
| Expiry date | Oct 13, 2029 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01Q5/328
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
The present invention relates to an antenna device for a portable radio communication device adapted for receiving and/or transmitting radio signals in at least a first and a second operating frequency band, said antenna device comprising a half-loop radiating element, comprising a feeding portion and a grounding portion, and arranged to operate at FM frequencies. The antenna device comprises a capacitor at said feeding portion and an inductor at said grounding portion, and said half-loop radiating element is arranged to simultaneously with FM frequencies operate at frequencies at least ten times higher than FM frequencies, wherein said capacitor is arranged to short circuit said half-loop radiating element to ground for frequencies at least ten times higher than FM frequencies and said inductor is arranged to short circuit said half-loop radiating element to ground for FM frequencies.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.