COMMUNICATION APPARATUS, DIELECTRIC WAVEGUIDE FILTER, AND CAPACTIVIE COUPLING BANDWIDTH REGULATION METHOD THEREFOR

摘要

The present invention relates to a communication apparatus, a dielectric waveguide filter, and a capacitive coupling bandwidth regulation method therefor. The dielectric waveguide filter comprises a dielectric block and a metal layer. One surface of the dielectric block is provided with a capacitive coupling through hole and two spaced apart frequency debugging holes. The capacitive coupling through hole is located between the two frequency debugging holes. The metal layer on the surface of the dielectric block is formed with a non-annular closed notch ring, wherein the closed notch ring is arranged to surround the periphery of the capacitive coupling through hole, and the closed notch ring is a closed notch ring that is closed. The capacitive coupling bandwidth is made to comply with requirements by means of adjusting the perimeter of the non-annular closed notch ring, making it unnecessary to reduce the coupling bandwidth by means of traditionally reducing the ring width D of an annular closed notch ring. The ring width d of a non-annular closed notch ring may be of a larger size (e.g. 0.4 mm or 0.6 mm or more), which facilitates equipment production and processing, has a high production efficiency, and can also prevent the defect of short circuiting when the ring width is small, thereby having more practicality.