| 摘要 |
PURPOSE:To improve both on-load Q and vibration resistance and to attain miniaturization for a coaxial filter by using a coaxial resonator obtained by forming the 1st metallic conductor and the 2nd metallic conductor separately from each other to a cylindrical dielectric material as a filter. CONSTITUTION:Cylindrical dielectric materials 32A-32C forming a coaxial resonator are provided within a housing 31 of a coaxial filter, and metallic conductors 33A-33C are formed to the upper part of the outer circumferential surface, the bottom surface and the inner circumferential surface of the housing 31 respectively. Then central conductors 34A-34C are provided at the upper parts of materials 32A-32C, and dielectric materials 36A and 36B are provided among an input terminal 35A, an output terminal 35B and conductors 34A and 34C. Then metallic conductors 37A and 37B are formed to the outer circumferentials of materials 36A and 36B. The conductors 34A and 34C are connected to terminals 35A and 35B via conductors 37A and 37B and materials 36A and 36B. Thus a coaxial resonator is obtained. This resonator is used as a coaxial filter to improve both no-load Q and vibration resistance of the resonator. |
