MICROWAVE STRIP LINE FILTER.

摘要

A microwave strip line filter in which a pair of dielectric bases are superposed one upon another and joined. There is a possibility that the variation of the electrical characteristics of the filter is caused by the misalignment between the resonance electrodes provided on the respective dielectric bases when they are joined. To avoid it, the resonance electrodes (11, 12, 13) on one dielectric base (10) are formed into a pattern of predetermined dimensions, and the resonance electrodes (21, 22, 23) on the other dielectric base (20) are formed into a pattern of smaller dimensions than the resonance electrodes (11, 12, 13). Also, to prevent the bonding agent used for joining the bases from having a bad influence upon the electrical characteristics, the bonding agent (26) is applied in the form of spots to the resonance electrodes (21, 22, 23). Further, to achieve various desired resonance frequency characteristics by the resonance electrodes of the same pattern easily with a high accuracy, the electric bases are made of ceramic materials of different dielectric constants from each other respectively.