Mobile communication
US7058434B2 · kind B2 · utility
149Cited by
9References
23Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 18, 2003 |
| Grant date | Jun 6, 2006 |
| Priority date | — |
| Expiry date | Jun 11, 2024 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01Q21/28
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
An antenna arrangement for dual mode radio devices such as WCDMA/GSM or Bluetooth radio devices. The arrangement contains two antennas close to each other, where a shorting switch is used at an open end of one antenna to increase isolation by effectively converting the one antenna from a quarter wave length antenna to a half wave length antenna when not needed in order to improve the efficiency of the other antenna. The shorting switch is typically a MEMS switch and the antennas are typically PIFA antennas. A radio device containing the arrangement has also been disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.