Dual-band equal-beam reflector antenna system
CA 2396265 A1 · Owner: Hamada, James S. · Inventors: Toland, Brent T.; Choung, Youn H.; Chan, Ronald Y.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A satellite antenna system employing a dual-band feed horn and dual-band beam forming network. The feed horn provides a common aperture for both satellite, uplink and downlink communications signal. The feed horn includes corrugations on an, inside surface defining two sets of alternating channels having different depths to create, circularly symmetric beams for the uplink and downlink signals. The antenna system, includes at least one reflector where the reflector shape, position, and the configuration, of the feed horn, is determined so that the mainlobe of the lower frequency downlink, feed signal illuminates the entire reflector and the mainlobe of the higher , frequency uplink …
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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 July 31, 2002. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended July 31, 2022.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 31, 2024.
- 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.