Closed loop active cancellation technique (ACT)-based RF power amplifier linearization architecture
US6452446B1 · kind B1 · utility
80Cited by
5References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 20, 2001 |
| Grant date | Sep 17, 2002 |
| Priority date | — |
| Expiry date | Dec 20, 2021 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F1/3235
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A closed loop, active cancellation technique (ACT)-based RF power amplifier linearization architecture injects a pilot tone as a ‘pseudo distortion’ signal into signal paths through first and second matched RF amplifiers, and a set of power minimization loops are closed around the RF amplifier pair. The power minimizing control loops control a set of vector modulators such that both the injected pilot tone and intermodulation distortion products are canceled, while RF carrier components constructively sum in the composite output of the two RF amplifiers.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.