Patent ID: 6778036
Filing Date: 2004-08-17
Classification: H01P,H03F

Abstract:
A high-frequency circuit device comprising:a distribution circuit for distributing a signal inputted from a signal input terminal to a plurality of first lines through a branch portion; a synthetic circuit for combining signals inputted from a plurality of second lines into one through a combined portion as an output signal and outputting the same from a signal output terminal; transistors respectively placed between an end of each individual first line of said distribution circuit and an end of each individual second line of said synthetic circuit; first isolator placed at the branch portion of said distribution circuit, the first isolator including an input port, an output port, and a third port each having two terminals, wherein one of the terminals of the input port is connected to the signal input terminal and the other terminal is grounded, both of the terminals of the output port is each connected to the corresponding first lines, and one of the terminals of the third port is connected to a terminal resistor and the other terminal is grounded; and second isolator placed at the combined portion of said synthetic circuit, the second isolator including an input port, an output port, and a third port each having two terminals, wherein both of the terminals of the input port is each connected to the corresponding second lines, one of the terminals of the output port is connected to the signal output terminal and the other terminal is grounded, and one of the terminals of the third port is connected to a terminal resistor and the other terminal is grounded.