Illinois Superconductor Corporation, Inc.

Mostafa A Beik

Amr Abdelmonem

Stephen K Remillard

H Clark Bell

An electromagnetic filter includes a filter housing containing a first resonant cavity and a second resonant cavity. Resonators are disposed within each of the cavities. The electromagnetic filter also includes a cavity wall separating the first resonant cavity and the second resonant cavity. The cavity wall includes a T-shaped aperture to achieve magnetic coupling between the first resonant cavity and the second resonant cavity.

Aperture having first and second slots for coupling split-ring resonators

Aperture for coupling in an electromagnetic filter

An electromagnetic filter has a unitary filter body defining a number of cavities. A cover for the filter body has several resonators attached to it which are located in the cavities when the cover is attached to the filter body. The cover has a recess into which a transmission line is placed. Passageways through the cover connect the transmission line with coupling mechanisms mounted on the cover adjacent the resonators. The resonators have a generally toroidal shape and the coupling mechanisms are shaped to provide the desired coupling between the transmission line and the resonators. An adjustable capacitor attached to the coupling loop has a passageway through its housing to eliminate moisture from the capacitor. The resonator and cavities may be tuned by use of a tuning mechanism which is also designed to minimize moisture which might prevent movement of the tuner during tuning.

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Arlington Heights, IL, United States of America

Mostafa A Beik