| 摘要 |
PURPOSE:To simplify a structure, also to execute easily an adjustment, and to raise a characteristic by forming a stepped part on both ends in the direction for arranging a dielectric resonator, and placing an adjacent circuit substrate. CONSTITUTION:A stepped part 91 is formed on both ends of a filter installing base 9, and dielectric resonators 21-23 are arranged through an insulating base 10 on the line for connecting the stepped part 91. Also, when a housing 6 to which a mixer, a circulator, etc. are mounted is installed to the stepped part 91 and operated, the resonator 21 of the first stage is magnetically coupled to an input side coupling antenna 51, and the resonator 21 is magnetically coupled to the adjacent resonator 22. Furthermore, the resonator 22 is magnetically coupled to the resonator 23 of the post-stage, and the resonator 23 is magnetically coupled to an output side coupling antenna 52. Accordingly, it is possible to take out a dielectric filter only and to adjust the simple substance, and also, its fine adjustment can be executed in a state that it remains incorporated, by providing additionally an adjusting screw as necessary. |
