Ku-band high power high efficiency pseudomorphic HEMT

Abstract

We report on the record power performance of 0.25 /spl mu/m/spl times/8 mm double recessed GaAs-based Pseudomorphic High Electron Mobility Transistors (PHEMTs) at 12 GHz. When the drain biased voltage (V/sub DS/) was at 8 V, a 5.4 W continuous wave (C.W.) output power was obtained with 10.3 dB power gain, 53% associated power-added efficiency (PAE) and 11.5 dB linear gain. When V/sub DS/ was increased to 9 V, the devices delivered 6.0 W C.W. output power, with 10.8 dB power gain, 52% PAE and 11.5 dB linear gain. To the authors' knowledge, this is the highest PAE and output power achieved by a single solid state transistor at this frequency. Furthermore, the devices operated efficiently from 3 to 9 V with more than 50% PAE.< <ETX xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">&gt;</ETX>