| 摘要 |
PURPOSE: A dielectric filter is provided to apply the filter to a circuit which needs various frequency damping characteristics positively by using resonance holes. CONSTITUTION: A dielectric body(150) has a first resonance hole(110) and a second resonance hole(120). The dielectric body(150) induces electric polarization. A conductive film(170) is coated on the surface of the dielectric body(150). An input terminal(130) and an output terminal(140) are formed by grinding a portion of the conductive film(170). A trim portion(160) is formed by grinding the inner surfaces of the first and second resonance holes(110,120). The trim portion(160) has a predetermined capacitance(Cs).
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