Keating & Bennett, LLP
Front-end circuit and communication terminal apparatus
A front-end circuit includes a diplexer and an impedance conversion circuit. The diplexer includes a feeding side common port through which a high-frequency signal in a high band and a high-frequency signal in a low band are input and output, a first port through which a high-frequency signal in a high band is input and output, and a second port through which a high-frequency signal in a low band is input and output, and demultiplexes or multiplexes the high-frequency signal in a low band and the high-frequency signal in a high band. The impedance conversion circuit is connected between the second port of the diplexer and an antenna port. The first port of the diplexer is directly connected to the antenna port through a transmission line.
Murata Manufacturing Co., Ltd.
H H H H H H H
H03H H03H H04B H03H H04B H01F H03H
inventional additional inventional inventional inventional additional inventional
Kenichi Noriyuki Noboru
Ishizuka Ueki Kato