| 摘要 |
PURPOSE:To obtain a dielectric filter designing the improvement of performance in assembling work by constituting a titled filter in such a way that a dielectric board is used and a pattern mounting resonators and a resonance frequency ad- juting pattern for the resonators are formed on the surface of the board. CONSTITUTION:A ground conductor pattern to mount the dielectric resonators 23a, 23b and 23c, a ground conductor pattern 27a to form capacitors via the dielectric board 26, frequency adjusting patterns 28a, 28b and 28c connected to the dielectric resonators 23a, 23b, 23c and input and output terminals 29a, 29c connected to the dielectric resonators 23a, 23c of the input/output stage are formed to the dielectric board 26 by metallic film. Moreover, an input/output terminal 299 is formed to an open part of the dielectric resonators 23a and 23c except the dielectric resonator 23b by metallic film, and an electromagnetic wave impressed from the input and output terminals 29a, 29c is supplied to the dielectric resonators. Through the constitution above, the dielectric filter not using any metallic case in the mounting constitution and designing the improvement of performance of assembling work is obtained. |
