Patent ID: 6288620
Filing Date: 2001-09-11
Classification: H01P,H04B

Abstract:
An antenna-duplexer, comprising:a transmission terminal, a reception terminal and an antenna terminal;a transmission side circuit, electrically connected between said transmission terminal and said antenna terminal, and comprising at least one first resonator and a first voltage-controllable impedance element which is electrically connected between said first resonator and ground via either a first inductance or a first capacitor; anda reception side circuit, electrically connected between said reception terminal and said antenna terminal, and comprising at least one second resonator and a second voltage-controllable impedance element which is electrically connected between said second resonator and ground via either a second inductance or a second capacitor;a plurality of said first voltage controllable impedance elements being connected in series to said first resonator of said transmission side circuit which is electrically connected closest to said antenna terminal.