Phased array antenna with temperature compensating capability
CA 2024946 C · Owner: Nec Corporation · Inventors: Kuwahara, Yoshihiko
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Disclosed is a phased array antenna capable of sufficiently compensating for not only the changes in beam direction but also the changes in beam shape and side lobe level due to temperature and, thereby, insuring the expected MLS (microwave landing system) performance. A phased array antenna has a plurality of radiating elements, a power divider for distributing transmitting power to the radiating elements and, a plurality of phase shifters each being connected between the power divider and respective ones of the radiating elements. Scanning a beam is effected by controlling the amounts of phase shift of the phase shifters. A characteristic compensating apparatus for the antenna according …
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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 September 10, 1990 and granted December 13, 1994. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 10, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 10, 2012.
- 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
Timeline From CIPO dates
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.