Distributed RF power amplifier with load compensation
US6768378B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 13, 2001 |
| Grant date | Jul 27, 2004 |
| Priority date | — |
| Expiry date | Dec 13, 2021 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F3/189
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A radio frequency power amplifier circuit according to certain embodiments of the present invention uses a distributed radio frequency amplifier 110 having a plurality of stages each with an input. The distributed radio frequency amplifier 110 drives an output load, such as an antenna 114. A drive signal synthesizer 106, having a plurality of outputs, drives the plurality of inputs to the distributed amplifier 110. Changes in load impedance are measured, e.g., using a directional coupler 160, and the measurement is used to change a drive signal produced by the drive signal synthesizer 106 to compensate for the change in load impedance.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.