Polar envelope correction mechanism for enhancing linearity of RF/microwave power amplifier
USRE37407E · kind E · reissue
47Cited by
28References
14Claims
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Key dates
| Filing date | Apr 19, 2000 |
| Grant date | Oct 16, 2001 |
| Priority date | — |
| Expiry date | Apr 19, 2020 |
Classification
- Technology area (CPC —)General
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.