| 摘要 |
PURPOSE:To stabilize the oscillation without decreasing the Q by providing a through-hole in parallel to a block casing of a dielectric and forming a parallel resonator where conductors are adhered to an inner face of each through-hole and an outer face of the casing and they are coupled mutually. CONSTITUTION:The resonator 10 has a block casing 11 of a titanium oxide type ceramic dielectric. Two parallel through-holes 12, 13 are provided to the casing 11, and the inner conductors 15, 16 are adhered to the inner wall of the through-holes. The outer conductor 14 is adhered similarly to the outer wall of the casing. Two unit resonators 17, 18 are formed to the resonator 10 by the conductors. In changing the resonance frequency of one unit resonator, the frequency of the other resonator is changed and the resonance frequency contributing to the oscillation in the split resonance is changed. Thus, the oscillation having high stability is attained without decreasing the Q of the resonator. |
