Electronically scanned antenna
CA 1101541 A · Owner: Hoffman Electronics Corporation · Inventors: Olson, Roy H.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
There is disclosed herein an antenna for generating a rotating pattern. The pattern is generated electronically and no physically moving, parts are required. An exemplary embodiment of the antenna radiates a cardioid pattern which rotates at a 15Hz rate for use as a Tacan beacon. The structure of the antenna is in the form of a conic monopole above a ground plane. A plurality of vertical modulator fins providing controllable short-, ing elements and a plurality of suppressor posts are added. The modulator fins have associated diodes to which are applied a bias current along with modulating signals which cause the resistance of the diodes to vary with respect to the flow of RF current at the …
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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
- Granted May 19, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 19, 1998.
- 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.