Dielectric resonator for a microwave filter, and a filter including such a resonator
CA 2176326 C · Owner: Theron, Bernard · Inventors: Latouche, Yannick; Theron, Bernard
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to a multimode composite resonator in particular for a microwave filter, the resonator comprising a resonant cavity and a dielectric resonator element disposed inside the cavity tuning means for a plurality of different modes of the dielectric element and coupling means between said modes. The innovation consists in the relative shape of the element and of the cavity: in one embodiment the element is in the form of a parallelepiped of parallelogram section with four sides and four vertices and said vertices are short- circuited together by the conductive walls of the cavity via RF electrical contact between said vertices and the walls. An additional embodiment can be …
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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 May 10, 1996 and granted January 15, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 10, 2016.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 10, 2018.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
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Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.