| 摘要 |
A block type dielectric filter including a dielectric block and a plurality of through holes wherein a resonance frequency at individual resonating portions can be set at a specific value even when the dielectric filter is miniaturized. The resonance frequencies can be varied at the individual resonating portions simply by creating a slight change in a coupling factor. The plurality of through holes are provided extending from one surface of the dielectric block toward an opposite surface. Surfaces, except for an open end surface, of said dielectric block are clad with a conductive material layer and a groove is provided on the open end surface between a set of adjacent through holes. The groove is provided offset toward a through hole by an offset quantity.
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