Multiple beam by shaped reflector antenna
CA 2247700 A1 · Owner: Space Systems/Loral, Inc. · Inventors: Smith, Terry M.; Durvasula, Bhaskar
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An antenna system has a reflector illuminated by a primary feed for producing a primary beam. The reflector is illuminated further by a secondary feed formed of an array of secondary feed elements of which the respective electromagnetic signals are adjustable in terms of their relative amplitudes and phases to produce a secondary beam with sidelobes oriented in directions away from the directions of the primary beam. Spacing among feed elements of the secondary feed array is selected for further control of orientation of sidelobes of the secondary beam. Highest efficiency is attained for signals of the primary feed by configuring the reflector for forming the primary beam, while 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 September 22, 1998. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended September 22, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 22, 2020.
- 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.