| 摘要 |
PURPOSE: A dielectric duplexer is provided to reduce the entire thickness by simplifying an open surface outer contour pattern structure of a dielectric block. CONSTITUTION: A dielectric duplexer comprises a dielectric block(D2), a first to an eighth resonator holes(R21-R28) from the open surface(12) to the rear surface(13) of the dielectric block(D2), a first and a second input/output electrodes(P21,P22), an antenna electrode(Ant2), a load electrode(H21) and a ground strip line(H23). The dielectric block(D2) is coated with conductive material except for the open surface(12). The inner surfaces of the resonator holes(R21-R28) are coated with conductive material. The first and the second input/output electrodes(P21,P22) are formed on the open surface(12) and the top surface(11) of the dielectric block(D2) for functioning as signal input and output of a band pass filter. The load electrode(H21) is formed around the resonator holes(R21-R28) on the open surface(12) and is coupled to the inner conductive material. The ground strip line(H23) is coupled to the load electrode(H21) and the outer conductor for adjusting coupling strength and transmission zero.
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