| 摘要 |
PURPOSE:To reduce the material cost and assembling cost and also to improve the assembling work performance and the reliability in use by forming a capacitor electrode on an open end face of a conductor so as to mount directly a resonator unit body to a printed board or the like. CONSTITUTION:A resonator A is a two-stage form resonator where resonator units 1a, 1b of the same specifications are coupled magnetically. In the 1st resonator unit 1a, a circular through-hole 3a is formed to the center of a rectangular parallelopiped block form dielectrid 2a made of a ceramic or the like, an inner conductor 4a is formed to the circumference of the hole and an outer conductor 5 is formed to the outer surface of the dielectric as film, an electrode 6 short-circuiting electrically the outer conductor 5 and the inner conductor 4a is formed to one end face of the dielectric 2a so as to form a short-circuit end face 7 and the other end face is set to an open end face 8 respectively and a capacitor electrode 9a is formed to the open end face 8. The capacitor electrode 9a is an electrode where a device connecting side electrode 11a of a convexed from having a connecting terminal in matching with one side of the open end face 8 and a projected electrode 12a connected electrically to the inner conductor 4 are arranged oppositely at a prescribed interval and a required coupling capacitance is ensured between both the electrodes 11a and 12a.
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