150 GHz GaAs MITATT source

The performance of a GaAs Schottky barrier transmit-time source is described. The device is reversed biased into mixed tunnel-avalanche breakdown. A CW output power of 3 mW with 1/2% conversion efficiency has been measured at 150 GHz. This is the highest frequency CW GaAs source built to date and has many potential applications in systems requiring a low noise local oscillator in near millimeter microwave integrated circuits.