Signal coupling apparatus
CA 1202093 A · Owner: Dx Antenna Company, Limited · Inventors: Kamiya, Kimitaka
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Disclosed is a transmission line device for coupling two waves such as horizontal and vertical polarization waves of satellite broadcasting which are travelling in a particular direction along a pair of main transmission lines, selectively to a branch line without problem of mismatch. The branch line is composed of a single feeder and selection of the two waves can be effected simply by applying positive or negative voltage to this feeder. The two waves are fed to a coupler having an output connected to the feeder and oppositely poled diodes which are made conductive by positive and negative voltages, respectively, to couple one or the other of the two waves to the output.
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 18, 1986. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 18, 2003.
- 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.