DEVICE FOR SEPARATING TRANSMITTER AND RECEIVER

摘要

PURPOSE: A device for separating a transmitter and a receiver is provided to improve a power efficiency by using a ceramic resonator. CONSTITUTION: A device for separating a transmitter and a receiver is to separate a transmitter and a receiver using different frequencies. A first transmission linear ceramic dielectric resonator(10) has a first resonant frequency about a center band of a reception frequency width of a portable terminal unit between a transmitter and an antenna. A capacitor(C1) has a capacitive impedance value to offset an inductive impedance value of the first transmission linear ceramic dielectric resonator. The first transmission linear ceramic dielectric resonator is directly connected to the capacitor. A second transmission linear ceramic dielectric resonator(12) has a second resonant frequency about a center band of a reception frequency width between a receiver and an antenna. An inductor(L1) has a capacitive impedance value to offset an inductive impedance value of the second transmission linear ceramic dielectric resonator. The second transmission linear ceramic dielectric resonator is directly connected to the inductor.