Mobile communication device having multiple frequency band antenna
US6677903B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Dec 4, 2001 |
| Grant date | Jan 13, 2004 |
| Priority date | — |
| Expiry date | Dec 4, 2021 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01Q9/0442
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A mobile communication device comprises an antenna and a housing enclosing a circuit board having communication components disposed thereon to transmit and receive communication signals. The antenna includes a substrate having opposite first and second surfaces, a planar conducting layer, a quarter wave choke strip, and a monopole conducting layer. The planar conducting layer is disposed on the first surface of the substrate, while the quarter wave choke strip and the monopole conducting layer are disposed on the second surface of the substrate. The quarter wave choke strip is electrically coupled to the planar conducting layer and connected to the monopole conducting layer. The antenna may be configured to work in three frequency bands: an upper band, a middle band, and a low band. During operation, the monopole conducting layer works as a monopole radiating in the upper frequency band, the quarter wave choke strip is works in a middle frequency band, and the monopole conducting layer, the quarter wave choke strip, and the planar conducting layer combined work as a monopole radiating in the low frequency band.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.