1.2 V operation 1.1 W heterojunction FET for portable radio applications

This paper describes 1.2 V operated power performance of a double-doped AlGaAs-InGaAs-AlGaAs heterojunction FET (HJFET) at 950 MHz. A 28 mm gate periphery HJFET delivered a saturated output power of 1.1 W for maximum output power tuning and a maximum power-added efficiency of 63% for maximum efficiency tuning. These results significantly advance the state-of-the-art of low voltage operation power devices for portable radio applications.