| 摘要 |
PURPOSE: A built-in type dielectric filter and duplexer is provided to generate a coupling pattern between resonator holes which are not adjacent to each other by forming a dielectric line having a predetermined resistance value on a load electrode connected to a resonator hole. CONSTITUTION: An open surface is formed at one surface of a dielectric block(D2). An external conductor is formed at a total outside of the dielectric block(D2) except the open surface. A conductive material is coated at the dielectric block(D2). An internal conductor is formed at the first and second resonator holes(R21,R22). The first and second resonator holes(R21,R22) are formed at an inner surface of a through hole from the open surface(22) of the dielectric block(D2) to the other side rear surface(23) of the dielectric block(D2). The first and second input/output electrodes(P21,P22) are formed to extend from the open surface(22) to an upper surface(21) of the dielectric block(D2). The first and second input/output electrodes(P21,P22) input and output a signal to and from a band pass filter.
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