ABSTRACT: High‑power GaN devices operating from several hundred watts up to the kilowatt level place extreme demands on Load Pull measurement systems. Accurate characterization requires highly reflective fundamental and harmonic load impedances while maintaining measurement integrity, safety, and repeatability. Conventional passive or fully active Load Pull techniques face fundamental limitations at these power levels, driven by tuner loss, injected‑power requirements, and harmonic isolation.
The Maury Microwave MT2000 system addresses these challenges using a
hybrid passive–active harmonic Load Pull architecture. By combining passive pre‑matching with controlled active impedance synthesis, the MT2000 enables accurate high‑VSWR harmonic Load Pull measurements while minimizing injected power. This approach delivers practical, repeatable characterization of high‑power GaN devices under operating conditions that closely reflect real amplifier applications.