Multi-layered patch antenna
CA 2292129 C · Owner: Hughes Electronics Corporation · Inventors: Bhattacharyya, Arun K.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An antenna structure (20) is formed of a first patch plane (38) a first ground plane (24), a feed member plane (34) a second ground plane (30), and a second patch plane (42) all spaced apart by layers of laminated dielectric substrate. A horn (44) transmits energy upon the second patch plane (42). The energy is controlled in terms of phase and frequency and is further electromagnetically coupled to the first patch plane (38) which transmits in the form of shaped or pencil beams. The coupling between patch planes (38 42) is accomplished by an array of slots (50 54) located through the ground planes (24 30) and an array of feed members interposed between the ground planes (24 30). The phase …
Read the whole patent
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 December 13, 1999 and granted April 23, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 13, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 13, 2021.
- 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.