Wave guide element for an electrically controlled radar antenna
CA 1270550 C · Owner: Telefonaktiebolaget Lm Ericsson · Inventors: Karlsson, Erik Roland
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A waveguide element for an electrically controlled radar antenna comprises a non-resonant waveguide fed from a feed opening. The feed opening divides the waveguide longitudinally into a first and a second part, each provided at its outer end with absorbent terminations slots are formed in the waveguide and their central points in the longitudinal direction have in the first part a mutual spacing which is less than half the wavelength (??), while their central points in the longitudinal direction in the second half have a mutual spacing which is greater than half the wavelength.
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 June 19, 1990. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 19, 2007.
- 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.