| 摘要 |
PURPOSE: A dielectric duplexer is provided to adjust capacitive coupling between resonator holes and between a resonator hole and an input/output electrode. CONSTITUTION: A dielectric duplexer comprises a dielectric block(D2), a first to a third resonator holes(R21,R22,R23) 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), and a signal transmission units(H1,H2). The dielectric block(D2) is coated with conductive material except for the open surface(12). The inner surfaces of the resonator holes(R21-R23) 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 signal transmission units(H1,H2) are formed between the resonator holes(R21-R23) and the input/output electrodes(P21,P22), between the resonator holes(R21-R23) and the outer conductor, and between the resonator holes(R21-R23) for adjusting capacitive coupling for signal transmission.
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