| 摘要 |
PURPOSE: A dielectric duplexer is provided to facilitate design and manufacture by using non-conductive pattern of a strip line for freely adjusting poles and zeros. 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), a strip line conductive pattern(H24) and a non-electrode pattern(S1). 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 conductor. The conductive pattern(H24) is formed near the top of the second to the fourth resonator holes(R22-R24). The non-electrode pattern(S1) is formed by removing a receiving stage part of an electrode coupled to the outer conductor.
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