Planar-shielded meander slow-wave structure
阅读：614发布：2023-11-16
专利汇可以提供Planar-shielded meander slow-wave structure专利检索，专利查询，专利分析的服务。并且A novel slow wave structure capable of ultrabroadband operation includes a meander line of a predetermined length on a layer of insulative material, a first series of spaced metal fingers forming a comb line are attached to the layer and extend in parallel from a front edge of the layer into the facing concave portions of the meander line and a second series of spaced metal fingers forming a comb line are attached to the layer and extend in parallel into the concave portions of the meander line from the opposed back edge of the layer. A metal layer or ground plane is connected to the underside of the layer and both series of metal projecting fingers are placed electrically in common together with the bottom ground plane. In a preferred method of manufacturing of the invention the insulative layer is completely coated or covered with metal on all surfaces and using a photoresist etching process the insulative spaces between the meander lines and the fingers are etched out leaving the desired structure.，下面是Planar-shielded meander slow-wave structure专利的具体信息内容。
1. A slow wave structure comprising: a continuous layer of dielectric material of a first predetermined thickness; a first metal comb-like structure, said comb-like structure comprising a plurality of flat spaced projecting teeth connected to a common flat bar-like member; a second metal comb-like structure, said second comb-like structure comprising a plurality of flat spaced projecting teeth projecting from a common flat bar-like member; said first and second comb-like structures having a second predetermined thickness less than said first predetermined thickness; each of said first and second comb-like structures being attached to an upper surface of said insulative layer with the teeth of said combs projecting in opposed directions along said upper surface and being interdigitally arranged, leaving space between said adjoining teeth and between the tips of said teeth and said bar to define a meander-shaped insulative space therebetween; a ground plane conductive metal layer attached to and covering the bottom surface of said insulative layer; a conductive metal coating on one side wall of said layer for electrically connecting said ground plane layer in common with said first comb-like structure and a conductive metal coating on another side wall of said layer for electrically connecting said ground plane in common with said second comb-like structure; and a meander-shaped electrically conductive flat metal strip applied to said upper surface and located in said meandershaped insulative space.
2. The invention as defined in claim 1 wherein each of said first and second comb structures and said meander-shaped strip comprise the metals gold and chromium, and wherein said insulative layer comprises boron nitride.
3. The invention in a slow wave structure comprising: an elongated slab of insulative material having a first predetermined thickness, a coating of electrically conductive material of a second predetermined thickness less than said first predetermined thickness covering all surfaces of said insulative slab except a first exposed insulator portion on said upper surface, said exposed insulator portion comprising a geometry of a meander line of a predetermined length and a predetermined pitch and a predetermined width, and meander line shaped electrical conductor means located within said exposed portion and attached to said slab surface and spaced from said first metal coating, said electrical conductor means having a width less than said predetermined width and the same predetermined pitch whereby shielding fingers are formed between the turns of the meander line which shielding fingers do not extend through the slab to the bottom metal surface but are connected from one end to the bottom metal layer via the metal coating on the sides of the slab of insulative material.
4. The invention as defined in claim 3 including an input terminal means connected to one end of said meander line and output terminal means connected to the other end of said meander line.
5. The invention as defined in claim 3 further including first electrical conductor means joining one end of said meander line to an adjacent portion of coating, and second conductor means joining The remaining end of said meander line to an adjacent portion of coating.
6. The invention as defined in claim 3 wherein said insulative slab comprises a fired ceramic dielectric material and wherein said first metal coating comprises gold chromium and wherein said meander line comprises the metal gold chromium.
7. A slow wave structure comprising a thin metal meander line, a relatively thick layer of insulative material, said meander line being coupled to and traversing over a top surface of said layer of insulative material; a plurality of thin metal fingers spaced from one another and projecting from a thin metal bar perpendicular to said fingers to form a thin comb-like structure on the top surface of said layer; said metal fingers being bonded to said insulative material and protruding from one side of said meander line within a corresponding concave portion of each meander in said meander line and spaced therefrom; a second plurality of metal fingers spaced from one another and projecting from a thin metal bar perpendicular to said fingers to form a thin comb-like structure on the top surface of said insulative layer; said metal fingers being bonded to said insulative material and protruding from the other side of said meander line within a corresponding concave portion of each meander in said meander line and spaced therefrom; an electrically conductive metal ground plane attached to and covering the bottom surface of said layer of insulative material; and thin metal electrical conductor means attached to the sides of said layer for connecting each of said first and second bars of said comb-like structures electrically in common with said ground plane.
8. The invention as defined in claim 7 wherein said last-named means comprises a first thin metal layer coupled to and covering a side surface of said layer adjoining said top and bottom surfaces of said layer for electrically connecting said metal bar of said first comb-like structure to said metal ground plane and a second thin metal layer coupled to and covering another side surface of said layer adjoining said top and bottom surfaces of said layer for electrically connecting said metal bar of said second comb-like structure to said metal ground plane.
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