Plate and grid modulated HF high-power tuned amplifier with increased efficiency

Abstract

The optimal design of a plate- and grid-modulated high-power tuned HF amplifier with increased efficiency is reported. The increased efficiency is achieved by introducing the third harmonic into the drive and output circuits. The analysis is carried out by applying a linear model of the constant plate current characteristics of an HF high-power triode. The initial CW (continuous-wave) working conditions are selected so that it is possible to realize a 100% modultion. Calculated values are presented graphically as functions of some relevant design parameters. A comparison is made with a tuned high-power amplifier without injection.