| 摘要 |
PURPOSE:To make a filter attachable and detachable, and to improve an assembling workability and a maintenance property, etc. by sticking a metallic plate for fitting the filter, onto a face having an electric conductor film of a dielectric block. CONSTITUTION:A dielectric block 11 of a dielectric filter 10 is formed like a rectangular parallelepiped, a metallized electric conductor film 11a is provided on five faces except the upper face, and the film 11a becomes an external electric conductor. The filter 10 is formed as a BPF constituted of four stages having four resonance elements 12-15. A metallic plate 20 for fitting the filter is stuck to the bottom face of the block 11 by an adhesive means such as soldering, etc., and screw fitting holes 20c, 20d are penetrated and provided on projecting parts 20a, 20b of the plate 20. Since the plate 20 is fixed onto a device housing 21 with a screw, the filter 10 can be attached and detached easily, the assembling work is simplified, and the maintenance property is raised. |
