Microwave circuit with coplanar conductor strips
AssigneeThomson-CSF
InventorAndre Jean-Frederic
Life of this patent
Estimating the term…
Abstract
A microwave circuit has a flat dielectric substrate with one face carrying a grounded metallic layer partly broken away to leave room for a multiplicity of conductor strips coplanar therewith which form part of one or more transmission lines having input and output ends each comprising an ungrounded strip portion flanked by two zones of the grounded layer. Electrical continuity between separated portions of that layer, and/or between nonadjacent conductor strips, is established by short-circuiting wires jumping across intervening strip sections. With coupled transmission lines operating with different modes of propagation, this structure substantially equalizes their respective phase velocities.
Claims16
A microwave circuit comprising:
- a dielectric substrate with a flat face;
- a grounded metallic layer on an area of said face;
- a multiplicity of conductor strips on another area of said face framed by said layer, said conductor strips being coplanar with said layer and being part of at least one transmission line terminating at an edge of said substrate in an ungrounded central conductor which is flanked by two zones of said layer and coplanar therewith;
- and
- at least one ground strip on said face spacedly interleaved with certain of said conductor strips which form part of two parallel line branches terminating in respective output lines, said ground strip having two ends conductively connected to said layer.
A microwave circuit comprising:
- a dielectric substrate with a flat face;
- a grounded metallic layer on an area of said face;
- and
- a multiplicity of conductor strips on another area of said face framed by said layer, said conductor strips being coplanar with said layer and being part of a plurality of mutually coupled transmission lines each including at least one conductor strip spacedly interposed between two bracketing conductor strips of another of said transmission lines, the bracketing strips being conductively interconnected at both ends thereof, said coupled transmission lines meandering around a plurality of ground strips paralleling said conductor strips, said ground strips each having two ends conductively connected to said layer.
A microwave circuit comprising:
- a dielectric substrate with a flat face;
- a grounded metallic layer on an area of said face;
- a multiplicity of said conductor strips on another area of said face framed by said layer, said conductor strips being coplanar with said layer and being part of at least one transmission line terminating at an edge of said substrate in an ungrounded central conductor which is flanked by two zones of said layer and coplanar therewith;
- and
- a plurality of ground strips on said face spacedly interleaved with certain of said conductor strips in parallel and substantially coextensive relationship therewith, said certain of said conductor strips having ends interconnected by transverse strip sections, each of said ground strips having one end integrally joined to said layer and a free opposite end separated from said layer by one of said transverse strip sections, the free end of each of said ground strips being connected to said layer by a respective wire jumping across the intervening transverse strip section.
A microwave circuit comprising:
- a dielectric substrate with a flat face;
- a grounded metallic layer on an area of said face;
- a multiplicity of conductor strips on another area of said face framed by said layer, said conductor strips being coplanar with said layer and being part of at least one transmission line terminating at an edge of said substrate in an ungrounded central conductor which is flanked by two zones of said layer and coplanar therewith;
- and
- a plurality of ground strips on said face spacedly interleaved with certain of said conductor strips in parallel and substantially coextensive relationship therewith, each of said ground strips being provided with two ends integrally joined to said layer and being interposed between two of said conductor strips, the latter having ends interconnected by a wire jumping across an end portion of the interposed ground strip.
Dependencies are inferred from the claim text.