TRI-MODE MATCHING CIRCUIT BETWEEN ANTENNA AND DUPLEXER IN MOBILE COMMUNICATION TERMINAL

摘要

PURPOSE: A tri-mode matching circuit between an antenna and a duplexer in a mobile communication terminal is provided to decrease loss when passing each service band of a transmission terminal and embody a maximum power by decreasing maximum loss and connecting the antenna to the duplexer of each service. CONSTITUTION: A tri-mode antenna matching unit(20) connects to a dual-band antenna(10) and matches a PCS band with a cellular band. A cellular band matching unit(40) receives a receiving signal output from the tri-mode antenna matching unit(20) and matches only a cellular band duplexer(30) with the receiving signal. A PCS band matching unit(60) receives the receiving signal output from the tri-mode antenna matching unit(20) and matches only PCS band with the receiving signal.