Power distribution network for array antennas
CA 2064345 A1 · Owner: Smith, David A. · Inventors: Smith, David A.; Smith, Adrian D.; Mccormick, Alan H. I.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A signal distribution network for the planar array antenna of a monopulse radar system comprising a plurality of array elements a, sum channel feed and a difference channel feed each feed being split, to define an even number of transmission lines N the elements of the, array comprising N groups each group being coupled to both channel feeds via a different pair of transmission lines such that the lines of each pair communicate respectively with the sum channel and the difference channel, the elements and the lines being mutually cross coupled by directional couplers such that each element receives an appropriately weighted signal from each channel feed.
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 March 23, 1992. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended March 23, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 23, 2014.
- 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.