DIELECTRIC FILTER

摘要

PURPOSE: A dielectric filter is provided to improve a characteristic of a filter and reduce fabrication costs by using a mutual inductance and a parasitic capacitor as a coupling device of a coupling capacitor. CONSTITUTION: A coupling capacitor is used as an inter-digital capacitor(30) or a gap capacitor. A shape of the inter-digital capacitor(30) or a shape of the gap capacitor is formed on one side of a metal mold. A dielectric resonator(10) is molded and sintered by using the metal mold. The shape of the inter-digital capacitor(30) or the shape of the gap capacitor is formed on one side of the dielectric resonator(10). An electrode is formed on the dielectric resonator(10) by using silver or copper. An input capacitor and an output capacitor are formed by a chemical etching method. A dielectric filter is formed by polishing the dielectric resonator(10).