Wave transmission lines and networks – Coupling networks – Wave filters including long line elements
Patent
1996-11-27
1998-07-07
Ham, Seungsook
Wave transmission lines and networks
Coupling networks
Wave filters including long line elements
3332191, 333230, 333235, H01P 120, H01P 710
Patent
active
057775346
ABSTRACT:
An inductive tuning disk for tuning a resonant frequency of a resonator of a microwave filter. The microwave filter includes a housing that encloses a cavity and a resonator therein. The resonator exhibits a magnetic field that appears in the cavity. The inductive tuning disk includes a dielectric base which is supported from a top wall of the housing by a support, and which is disposed within the cavity at an adjustable height above the resonator. The inductive tuning disk further includes an inductor ring which is disposed over a portion of a top surface of the dielectric base, and which is spaced apart from a center of the base. The inductor ring includes an electrically conductive material. The inductor ring interacts with the magnetic field to cause a resonant frequency of the resonator to vary as a function of the adjustable height. The disk may also be used to couple the magnetic energy between a pair of resonators of a filter.
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Ham Seungsook
L-3 Communications Narda Microwave West
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