A multi-pattern antenna having independently controllable antenna pattern characteristics
CA 2316783 C · Owner: Northrop Grumman Space & Mission Systems Corp. · Inventors: Chandler, Charles W.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An antenna for providing a first antenna pattern at a first frequency of operation and a second antenna pattern at a second frequency of operation from first and second RF signals, respectively. The antenna included a horn which is, dimensioned to generate the first antenna pattern from the first RF signal. A conduit, is located within the horn and is configured to propagate the second RF signal in a, waveguide mode. A corrugated rod having a first and a second portion is associated with the conduit. The first portion of the rod is located inside the conduit, and the second portion of the rod protrudes from the conduit into the horn. The rod, is configured to be responsive to the …
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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 August 28, 2000 and granted September 17, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 28, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 28, 2022.
- 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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Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.