| 摘要 |
PURPOSE: A dielectric duplexer is provided to prevent unnecessary redundant coupling between filters, while allowing filter design procedures to be performed in an easy manner and reducing the size of dielectric duplexer. CONSTITUTION: A dielectric duplexer comprises a dielectric block(20) having an open surface(22) and an outer surface provided with an outer conductor; a plurality of resonators(R21 to R28) having a plurality of holes penetrating from the open surface to a rear surface(23) of the dielectric block, and inner conductors formed at the inner surface of each hole, wherein resonators operate as band pass filters for transmitter and receiver terminals; input/output electrode sections(P21 to P23) formed from the open surface to an upper surface(21) of the dielectric block, and which perform a signal transmission function between band pass filters; and signal coupling preventing sections(S21 to S23) spaced apart from input/output electrode sections at the open surface of the dielectric block, and which achieve an electric isolation between band pass filters.
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