Planar general response dual-mode cavity filter
CA 2287152 A1 · Owner: Fiedziuszko, George A. · Inventors: Fiedziuszko, Slawomir J.; Fiedziuszko, George A.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An electromagnetic cavity filter is formed by at least two cavities having electrically conductive walls. Each cavity is the equivalent of two filter poles because, two orthogonal modes of electromagnetic radiation can resonate within each cavity. Characterizing vector tuning elements are coupled to each of the cavities that are each, aligned along respective axes. The tuning elements are used to provoke derivative, orthogonal modes and determine the degree of coupling between orthogonal modes. One or more intercavity couplers interconnect the cavities and are rotated at arbitrary, angles that are different from the axes of the characterizing vector tuning elements. Electrically …
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Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Filed October 19, 1999. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended October 19, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 19, 2021.
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Timeline
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Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.