| 摘要 |
PROBLEM TO BE SOLVED: To provide a waveguide type resonator filter capable of changing the passing bands by electronic control. SOLUTION: The resonator filter 1 comprises an oblong waveguide 10, having a TE10 transmission fundamental mode and a plurality of rod-like inductive elements in it that constitute a resonator; a strip conductor 12, provided in the oblong waveguide 10 for combining the magnetic fields generating inside the oblong waveguide 10 at a prescribed degree of coupling; and a resonance frequency varying portion 14, connected to the strip conductor 12 via a coaxial transmission line 13 and having a varactor diode 15, where the resonance frequency of the resonator is varied, according to the change in the capacity of the varactor diode 15. COPYRIGHT: (C)2009,JPO&INPIT
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