Bandstop filter coupling tuner
AssigneeIllinois Superconductor Corporation
InventorsPiotr O. Radzikowski, Craig R. Clermont
Life of this patent
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Abstract
A resonant structure and filter include a resonant element mounted to the cover of a housing. A transmission line passes through the cover and is connected to a coupling loop. The coupling loop is located adjacent the resonator and is connected to ground. A coupling tuner is attached to the housing and includes a post which is movably attached to the housing. The tuner extends between the coupling loop and the resonator, and may be adjusted to change the electromagnetic coupling.
Claims19
A resonant structure comprising:
- a housing defining a cavity;
- a resonant element located in the cavity;
- a coupling loop coupled to a signal source, wherein the coupling loop is adjacent the resonant element;
- and
- a coupling tuner extending into the cavity between the resonant element and the coupling loop, wherein the coupling tuner includes means for adjusting an extent to which the tuner extends between the resonant element and the coupling loop.
The resonant structure of claim wherein the coupling tuner comprises a threaded rod passing through a wall of the housing and into the cavity.
An electromagnetic filter comprising:
- a housing defining a plurality of cavities;
- a plurality of resonant elements wherein each resonant element is located in a respective cavity;
- a plurality of coupling loops, wherein each coupling loop is coupled to a signal source and each coupling loop is adjacent a corresponding resonant element;
- and
- a plurality of coupling tuners for adjusting coupling between a respective coupling loop and a corresponding resonant element, each coupling tuner respectively, extending into a corresponding cavity wherein each coupling tuner includes respective means for adjusting an extent to which the tuner extends into the corresponding cavity.
Dependencies are inferred from the claim text.