Method for adjusting characteristics of dielectric filter, method for adjusting characteristics of dielectric duplexer, and devices for practicing the methods

摘要

A method which is capable of easily obtaining specified filter characteristics in a short time, even in the case of a dielectric filter having complicated relationships between changes in the filter characteristics and the amount that a specified part of a dielectric member or a dielectric film is trimmed. In the dielectric filter, data is obtained in advance showing the relationships between the amounts that specified parts of a conductive film or a dielectric member are trimmed, and the corresponding changes in the values of a center frequency and a coupling coefficient between resonators. Further, adjustment values are obtained from the initial characteristics of the dielectric filter to be adjusted, and then, the targeted amounts of trimming are obtained from the adjustment values, targeted adjustment values, and the aforementioned data concerned so as to perform trimming.