W-band metamorphic HEMT with 267 mW output power

This paper reports the highest W-band power output of metamorphic HEMT (MHEMT) technology to date. 267 mW single stage performances at 90 GHz are achieved on a 0.15 micron GaAs-based production line with improved manufacturability over InP HEMT. The single stage circuits presented here are building blocks for future MHEMT power amplifier development.