| 摘要 |
PURPOSE:To set easily a resonance frequency with small size by adopting a structure that a dielectric member to inner and outer faces of which a conductor coating film is applied is pushed to an outer conductor until being locked while using a center conductor member as a guide. CONSTITUTION:A step part 31a is provided near an open end of a cylindrical outer conductor 31 where one end is short-circuited and the other is opened. A doughnut form dielectric member 32 where a conductor 34 is coated outward and inward to a dielectric 33 as a film is inserted up to the step 31a between a spiral center conductor 35 and the outer conductor 31 projected from the short- circuit end of the conductor 31 toward the open end, the member 32 is locked by tightening a pin 37 of a fastening member 36. Thus, ununiform air gap produced among the conductors is avoided, the resonance frequency is set stably and also since the member 32 is fixed to the member 36 by the pin 37, an excellent effect against the vibration proof in X, Y directions is attained. |
