Crossover traveling wave feed
CA 1234621 A · Owner: Singer Company (The) · Inventors: Mead, James B.; Deveau, Emile J.; Schwartz, Leonard
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A feed system for a microstrip or stripline antenna includes a serpentine traveling feed located in the plane of interleaved arrays along which a first signal propagates. A chain of crossover structures serves as a second traveling feed, extends in coplanar parallel spaced relation to the first feed, and carries a second propagated signal therealong. First and second ports of each structure connect the serpentine feed to a first group of arrays for coupling the first signal therebetween while third and fourth ports of each structure couple the second signal to a second set of arrays without significant interaction therebetween.
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
- Granted March 29, 1988. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 29, 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.