Patent ID: 6570451
Filing Date: 2003-05-27
Classification: H01L,H03F

Abstract:
A high-frequency power amplifier comprising:a semi-insulating compound semiconductor substrate; a first heterojunction bipolar transistor having a base electrode for receiving a signal and a collector electrode for outputting an amplified signal, said first heterojunction bipolar transistor being disposed on said semi-insulating compound semiconductor substrate; an input matching circuit connected to said base electrode for supplying a signal to said first heterojunction bipolar transistor, said input matching circuit being disposed on said semi-insulating compound semiconductor substrate; an output matching circuit connected to said collector electrode for outputting the amplified signal from said first heterojunction bipolar transistor, said output matching circuit being disposed on said semi-insulating compound semiconductor substrate; a bias circuit for supplying a base current to said first heterojunction bipolar transistor, said bias circuit being disposed on said semi-insulating compound semiconductor substrate; a first terminal connected to an output end of said bias circuit and disposed on said semi-insulating compound semiconductor substrate; a second terminal connected to said base electrode of said first heterojunction bipolar transistor and disposed on said semi-insulating compound semiconductor substrate; a dielectric mounting substrate to which said semi-insulating compound semiconductor substrate is bonded; and a reactance element on said dielectric mounting substrate and connected to said first terminal and said second terminal.