Microwave antenna
CA 1099014 A · Owner: N.V. Philips Gloeilampenfabrieken · Inventors: Williams, John C.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A microwave antenna comprises a ground conductor and a dielectric sheet supporting both an array of antenna elements and feeder lines to which the elements are connected in shunt and which are at angles to the direction of polarization of the antenna. The elements may be fed from a common central feed point. A suitable pattern of feeder lines comprises a plurality of parallel regularly-spaced lines enclosing a given n angle to the direction of polarization and intersected by a single feeder line enclosing the mirror-inverted angle to the direction of polarization. The feeder lines are suitably of much higher impedance than the elements. Power tapering across the antenna apertures giving …
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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 April 7, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 7, 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.