| 摘要 |
PURPOSE:To increase the variable capacitance of an adjusting screw without using a dielectric board by applying an insulating adhesives to a tip of the adjusting screw in a circulator where the impedance is matched by turning the adjusting screw screwed to an outer conductor toward the center conductor. CONSTITUTION:The center conductor is arranged at the center of the outer conductor 1, a ferrite 3 is interposed between both conductors, and a magnet 4 is arranged at the outside of the ferrite 3. Then two adjusting screws 5 are screwed to a part of the outer conductor 1 toward the center conductor 2. In turning the adjusting screw 5, the tip of the adjusting screw 5 to the center conductor 2 is adjusted. The insulating adhesives 7 is applied to the tip of the adjusting screw 5, the capacitance between the tip of the adjusting screw 5 and the center conductor 2 is set to a required value by a gap (d) between them and the dielectric constant of the adhesives 7 to adjust the desired impedance.
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