Quasi-optical stripline devices
AssigneeNational Research Council of Canada
InventorThomas H. Legg
Life of this patent
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Abstract
Quasi-optical stripline devices for forming and controlling a beam of radio waves are described. The devices include a strip transmission line having a pair of mutually parallel flat outer conductors and a flat center conductor with a dielectric between them. The center conductor has a narrow channel region, a wide expansion region and a tapered region smoothly connecting the regions. A beam of radio waves propagates freely in the expansion region and can be controlled in a quasi-optical manner by the pattern of the center conductor. The quasi-optical nature facilitates easy visualization of the devices for easy design and manufacture.
Claims13
A quasi-optical stripline device for forming and controlling a beam of radio waves, comprising:
- a strip transmission line including a pair of flat and mutually parallel outer conductors,
- a flat center conductor located at substantially the midpoint between and in parallel with the said out conductors,
- a dielectric material filling the space between the said outer and center conductors,
- the said center conductor having a predetermined conductive pattern which includes a narrow channel region, a wide expansion region and a tapered region smoothly connecting the said narrow channel region and the said wide expansion region, and
- phase shifting means in the said wide expansion region for changing the relative phase of an electric field in the said dielectric material by 180.degree. so that the propagating mode of the said beam of radio waves is changed between the stripline mode and the parallel plate mode.
Dependencies are inferred from the claim text.