| 摘要 |
PURPOSE:To keep the electric equivalent length of a coupling loop constant and to change the load Q by forming a coupling element to an external circuit by a rotation type coupling loop. CONSTITUTION:A dielectric resonator consists of an enclosure 1 made from a conductor, a resonance element 2 formed with a panel-shaped block made from a dielectric, a supporting body 3 which is made from a dielectric and coaxilally supports the resonance element 2 and the enclosure 1, a resonance frequency fine adjusting element 4 made from a dielectric, and two rotation type coupling loops 51 and 52 and is excited in the TE011 mode. When a setscrew is loosened to rotate the coaxial terminal consisting of an outer conductor, an inner conductor 8, and a separator 9 around the axis, the coupling loop 51 (or 52) is rotated together with the coaxial terminal. Thus, the area of the loop surface crossing the magnetic field is changed with the length of the coupling loop kept constant to equivalently change the coupling coefficient, and the load Q is changed.
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