Compact broadband microstrip antenna
CA 2124459 C · Owner: Tripp, Victor K. · Inventors: Tripp, Victor K.; Wang, Johnson J. H.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Arrangements of compact broadband microstrip antennas are disclosed Each arrangement comprises a dielectric material (32, 62) with the microstrip mounted to one side and a ground surface (GP) on the opposite side. A first arrangement comprises a closed array of antenna elements (63-70) electrically driven out of phase from one another to excite one or more spiral modes. A second arrangement comprises one or more antenna elements arranged on a magnetic substrate (73) which has a relative permittivity approximately equal to its relative permeability. In a third arrangement the microstrip antenna operates in a, single mode and radiation from other modes is suppressed by varying the spacing …
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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 November 4, 1992 and granted September 22, 1998. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 4, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 4, 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
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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.