Spurious-free flexible frequency converter and a satellite communication repeater architecture
US7941093B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jun 20, 2008 |
| Grant date | May 10, 2011 |
| Priority date | — |
| Expiry date | Oct 29, 2029 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B7/18513
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A method for frequency conversion within a satellite-based repeater system. An uplink radio frequency signal having a frequency fRF is received. A first and at least a second local oscillator signal having frequencies fL01 and fLO2, respectively, is generated. The uplink signal is mixed at a first frequency conversion stage with the first local oscillator signal to generate an intermediate signal having a frequency fMF. The intermediate signal is mixed at a second frequency conversion stage with the at least second local oscillator signal to generate a downlink signal having a frequency fIF. The generation and mixing of the signals are performed such that:fLO1 and fLO2>fRF and fIF fMF=fLO1−fRF, andfIF=fLO2−fMF.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.