| 摘要 |
A resonator 10 according to the present invention is provided with: an outer conductor 12 inside which a cavity 11 is formed; and an inner conductor 13 provided in the cavity 11 of the outer conductor 12. The inner conductor 13 comprises: a mobile body 133 provided projecting into the cavity 11; a distal end portion 131 which is a separate member from the mobile body 133 and which covers the distal end of the mobile body 133, on the side of the moving body 133 that projects into the cavity 11; and a supporting rod 132 which is a rod-shaped member disposed inside the mobile body 133, is provided with one end secured to the distal end portion 131 and the other end secured to the mobile body 133, and which has a lower coefficient of thermal expansion than the mobile body 133. By this means it is possible to provide a resonator having a high thermal stability, which is applicable in a plurality of frequency bands, and a filter employing said resonator. |
