Patent ID: 7030715

Claim:
A high-frequency semiconductor device; comprising: first and second amplifier; a dielectric substrate provided on an input side or an output side of the first and second amplifiers; a first transmission line formed on a surface of dielectric substrate and connected electrically to the first amplifier, the first transmission line having an electrical length of substantially λ/4 with respect to an operation frequency; a second transmission line formed on a surface of the dielectric substrate and connected electrically to the second amplifier, the second transmission line having an electrical length substantially λ/4 with respect to an operation frequency; a third transmission line formed on a surface of dielectric substrate between the first and second transmission lines, the third transmission line having an electrical length of substantially λ/4 with respect to an operation frequency; a first thin film resistor connected electrically between the first and third transmission lines and disposed in a passing direction of an electrical power so as to form a distributed constant; and a second thin film resistor connected electrically between the second and third transmission lines and disposed in a passing direction of an electrical power so as to form a distributed constant.