Wristwatch type cellular phone
US7280844B2 · kind B2 · utility
21Cited by
4References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 19, 2004 |
| Grant date | Oct 9, 2007 |
| Priority date | — |
| Expiry date | May 18, 2025 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B1/385
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A plurality of plane antennas 6-1 and 6-2 are embedded in the equipment body section 1, and every time occurrence of reception failure is detected by the internal electronics circuit, switching between the antennas used is established. Spatial diversity through selectively switching and using the plurality of plane antennas 6-1 and 6-2 is performed. Through this, even when reception sensitivity of one antenna in use deteriorates, good reception sensitivity can be gained through switching to another antenna. Thus, this can avoid inconvenience where calls are cut off.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.