Title :
28 V low thermal impedance HBT with 20 W CW output power
Author :
Hill, D. ; Tae Kim
Author_Institution :
Corporate R&D, Texas Instrum. Inc., Dallas, TX, USA
Abstract :
AlGaAs/GaAs heterojunction bipolar transistors have been fabricated which exhibit record output power for GaAs flip-chip technology, and record operating voltage for GaAs microwave power devices. Transistors with 2 mm emitter length readily achieve 20 W CW output power at 2 GHz when biased at 28 V, with typical power-added efficiencies of 62% (typical collector efficiencies of 70%). Maximum CW output power of 25 W has been obtained, corresponding to a power density of 12.5 W/mm.
Keywords :
III-V semiconductors; aluminium compounds; flip-chip devices; gallium arsenide; heterojunction bipolar transistors; microwave bipolar transistors; microwave power transistors; power bipolar transistors; thermal conductivity; 2 GHz; 20 W; 28 V; 62 percent; AlGaAs-GaAs; CW output power; collector efficiency; flip-chip technology; heterojunction bipolar transistor; low thermal impedance HBT; microwave power device; power density; power-added efficiency; Costs; Fabrication; Gallium arsenide; Heterojunction bipolar transistors; Impedance; Power generation; Silicon; Thermal conductivity; Thermal resistance; Voltage;
Conference_Titel :
Microwave Symposium Digest, 1997., IEEE MTT-S International
Conference_Location :
Denver, CO, USA
Print_ISBN :
0-7803-3814-6
DOI :
10.1109/MWSYM.1997.604541
