| 摘要 |
PURPOSE: A dielectric duplexer is provided to control the impedance, the capacitance, and the bandwidth by forming a both-sided pattern bar on an open side and an upper side neighboring to the open side of a dielectric block. CONSTITUTION: A dielectric duplexer includes a dielectric block(D2), a resonator, and an input/output electrode portion. The dielectric block(D2) includes one side formed with an open side(12) and the remaining sides formed with external conductors. The resonator includes a plurality of holes(R11-R18) formed between the open side and a bottom side of the dielectric block(D2). The holes(R11-R18) are operated as band pass filters of a transmitting end and a receiving end. Conductive materials are coated on each inner surface of the holes(R11-R18). The input/output electrode portion is formed at the open side and the neighboring side of the dielectric block(D2) in order to perform a signal transfer function. A both-sided pattern bar(20) is formed on the open side and an upper side(11) of the dielectric block(D2).
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