Shaped offset-fed dual reflector antenna
CA 1232061 A · Owner: Nippon Telegraph And Telephone Corporation · Inventors: Kagoshima, Kenichi; Karikomi, Masahiro
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A shaped offset-fed dual reflector antenna having a main reflector a, sub-reflector and a primary radiator which do not block the wave-path of said main reflector is improved by using a primary radiator inclined from a boresight axis of the antenna, and shaped non-quadratic surfaces in the main reflector and/or the sub-reflector, to provide the desired aperture field distribution, improved cross-polarization characteristics and improved, side-lobe characteristics. The incline angle of the primary radiator is in the range between 10 degrees and 40 degrees. When a gregorian type antenna is used, and the aperture field distribution is Tailor's-40 dB distribution the, incline angle is …
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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
- Granted January 26, 1988. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 26, 2005.
- 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.