Advances in Linearization of Wideband (GaN) Power Amplifiers Slides

This presentation discusses the state of the art in achieving wideband (> 1 GHz) linearization of power amplifiers. Multi-octave bandwidth linearization has been achieved at frequencies from L through millimeter-wave bands. Basic linearization concepts are reviewed. Emphasis is placed on the use of pre-distortion linearization and particularly on its application with amplifiers employing GaN FET power devices. The trades between using a single pre-distortion linearizer and multi-band linearizers are discussed. The effect of harmonics (both even and odd order distortion products) and their correction for applications that cover more than an octave are considered.