Method for tuning a GPS antenna matching network
US7548762B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 30, 2005 |
| Grant date | Jun 16, 2009 |
| Priority date | — |
| Expiry date | Jul 28, 2027 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B1/3805
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A system and method is provided for tuning a Global Positioning System (GPS) antenna matching circuit in a portable wireless communications device. The method includes accepting a first matching circuit tuning value, measuring satellite vehicle (SV) carrier-to-noise ratio (C/N) associated with the first tuning value and a first search time interval, measuring the SV C/N associated with a next tuning value, and selecting the tuning value associated with the highest SV C/N to tune the matching circuit. In one aspect, the method further includes comparing the SV C/N to a first minimum threshold. If the first tuning value SV C/N exceeds the first minimum threshold, then the method measures the SV C/N associated with the next tuning value. Otherwise, a default tuning value can be selected to tune the matching circuit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.