Fabrication and evaluation of GaAs-GaAlAs double-velocity IMPATT diodes

Abstract

Double-velocity IMPATT diodes have been fabricated and cw tested at X-band. From flat-profile single-drift material, 2.2 watts with II percent efficiency was attained. Somewhat higher efficiency was achieved with a High-Low structure. These results exceed previously reported heterojunction diode measurements. The flat-profile results are comparable to the performance of the corresponding GaAs structure. No significant difference was observed in the thermal resistance of the double-velocity diode and the conventional diode.