Impedance measurement in an active radio frequency transmitter
US8213885B2 · kind B2 · utility
1Cited by
22References
18Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Apr 9, 2009 |
| Grant date | Jul 3, 2012 |
| Priority date | — |
| Expiry date | Jul 15, 2030 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B17/10
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A transmitter and method for determining impedance measurement in an active radio frequency transmitter of an antenna are provided. Voltage and current samples are obtained from a modulating signal delivered to an antenna. The voltage and current samples are converted from analog to digital format, and decimation occurs to reduce the number of samples. Complex demodulation is performed of each of the voltage and current samples to baseband levels and decimation of the voltage and current samples is performed to reduce the number of samples. An impedance estimate can then be estimated from the voltage and current samples.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.