Polar envelope correction mechanism for enhancing linearity of RF/microwave power amplifier
US5742201A · kind A · utility
87Cited by
27References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 30, 1996 |
| Grant date | Apr 21, 1998 |
| Priority date | — |
| Expiry date | Jan 30, 2016 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F2200/57
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
Linearity of an RF/microwave power amplifier is enhanced by an amplitude and phase distortion correction mechanism based upon signal envelope feedback, that operates directly on the RF signal passing through the power amplifier. A phase-amplitude controller responds to changes in gain and phase through the RF/microwave power amplifier signal path caused by changes in RF input power, DC power supply voltages, time, temperature and other variables, and controls the operation of a gain and phase adjustment circuit, so as to maintain constant gain and transmission phase through the RF/microwave power amplifier.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.