Method for automatically switching antenna mode in portable telephone
US6301469A · kind A · utility
4Cited by
4References
12Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Apr 20, 1999 |
| Grant date | Oct 9, 2001 |
| Priority date | — |
| Expiry date | Apr 20, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01Q1/244
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A portable telephone with an extendible antenna automatically switches an antenna mode according to a received signal strength. The portable telephone measures an RSSI value while a call is processed in an internal antenna mode where the antenna is retracted, to compare the measured RSSI value with a threshold value. If the RSSI value is lower than the threshold value, the antenna is extended, thereby switching the antenna mode to an external antenna mode. In the meantime, if the call is terminated, the antenna is retracted, switching the antenna mode back to the internal antenna mode.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.