Dual-polarized and circular-polarized antennas
CA 2352106 A1 · Owner: Ittipiboon, Apisak · Inventors: Ittipiboon, Apisak; Petosa, Aldo; Cuhaci, Michel
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to an antenna structure for radiating electromagnetic waves in, predetermined polarization configurations. A dielectric substrate is provided with a copper, conductive pattern printed on each side. The conductors act as scattering elements and are, printed for scattering radiation provided along a first predetermined feed direction or along a, second feed direction independently. Preferably the pattern of the copper is , based on an interference pattern and two feeds are used one to provide radiation along , each of the two feed directions. When used as a traveling wave antenna the resulting structure is , flat, having a low profile, and lightweight with simple …
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 July 3, 2001. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended July 3, 2021.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 3, 2023.
- 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.