Wide frequency band differential phase shifter with constant differential phase shifting
CA 1236536 A · Owner: Selenia Spazio · Inventors: Vita, Piero
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Differential phase-shifter operating in a wide frequency band, with constant differential phase shifting. This device is characterized by the fact that it produces a differential phase shift between two perpendicular polarizations, with constant frequency. This way differential phase shifters with the desired flatness in the band can be obtained, either of 180° (polarizers for systems of linear polarization) or of 90° (polarizer for transforming the circular polarization into linear polarization and vice versa). Such a phase shifter can be used generally in antenna systems.
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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 May 10, 1988. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 10, 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.