Dielectric line converter, dielectric line unit, directional coupler, high-frequency circuit module, and transmitter-receiver
CA 2287036 C · Owner: Murata Manufacturing Co. Ltd. · Inventors: Saitoh, Atsushi; Takakuwa, Ikuo; Tanizaki, Toru
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Grooves are formed in the opposing surfaces of upper and lower conductor plates and a dielectric stripline is arranged in the grooves. At the same time the space between the conductor surfaces of a line conversion portion is made narrower than the space between the conductor surfaces of a first-kind dielectric line portion and the impedance matching to a second-kind dielectric-loaded waveguide is arranged. Further the line length of the line conversion portion is set to be an odd multiple of .lambda.g/4.
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 October 21, 1999 and granted February 11, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 21, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 21, 2021.
- 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.