Modulating array transmitter
CA 2192605 C · Owner: Chethik, Frank · Inventors: Chethik, Frank
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
This invention pertains to a method for producing high power microwave transmission signals conveying one of a plurality of symbols wherein a symbol represents a plurality of bits and also to a modulating array transmitter that operates in accordance with the method. The method includes a first step of applying j bits to a data storage device to address the data storage device to output N bits to N/2 QPSK modulators. Each of the N/2 QPSK modulators receives a subset (a pair) of the N bits. Each of the bit pairs specifies one of up to four phase shifts. Within each of the N/2 QPSK modulators a next step phase modulates a reference (e.g. local oscillator) signal in accordance with a phase …
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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 December 11, 1996 and granted February 19, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 11, 2016.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 11, 2018.
- 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.