| 摘要 |
PURPOSE:To reduce the production cost of a dielectric filter, by holding a metallic conductor plate which unifies a conductor in a resonator and an earth conductor with a dielectric plate. CONSTITUTION:A metallic conductor plate 21 consists of an earth conductor 22 and a conductor 23 in a resonator. The plate 21 is held between the dielectric plate 24 and 25. An air layer is excluded at the area that touches the plate 21, and a thick film conductor, the solder or an adhesive, etc. are used to fix the plates 21, 24 and 25. The thick film conductors are formed also on the outside surfaces of the plates 24 and 25 as well as on the side surface at the side of the conductor 22. Thus a 1/4 wavelength resonator containing a conductor 23 is obtained. As a result, a comb-line type band pass filter is formed. |
