CAPACITIVE COUPLING STRUCTURE AND DESIGN METHOD OF DIELECTRIC FILTER, AND DIELECTRIC FILTER

摘要

The present invention relates to a capacitive coupling structure and a design method of a dielectric filter, and a dielectric filter. The capacitive coupling structure comprises a dielectric block and a metal layer. When a capacitive coupling bandwidth of the capacitive coupling structure of a dielectric filter needs to be adjusted, the spacing H1 between the bottom wall of a first blind hole and a second surface is adjusted accordingly, specifically, for example, when producing and manufacturing a narrow-frequency band dielectric filter, the capacitive coupling bandwidth is reduced by increasing the spacing H1 between the bottom wall of the first blind hole and the second surface, and a large enough spacing H1 can be selected to process the narrow-frequency band dielectric filter, thus facilitating the production and processing, and having a high production efficiency; in addition, the hole wall of a tapered hole section is arranged obliquely relative to a first surface, thus making it convenient to form the metal layer on the hole wall of the first blind hole, and facilitating performing a processing operation on the metal layer of the tapered hole section by using a cutting tool (including a cutter, a laser, etc.), thereby improving the production efficiency.