US3904994A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Meander line circuit with an interdigital ground plane
Assignee: United States Department of the Army
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Filing: 1974-11-08
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Granted: 1975-09-09
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Expires: 1994-11-08
Abstract
Abstract An improved meander line, slow wave structure comprising a meander line conductor, a continuous dielectric substrate having a raised meander line shaped upper surface portion and a surrounding flat planar surface portion, a conductive ground plane connected to the flat planar substrate surface, said meander line conductor disposed on the upper surface of said raised portion of the substrate. The conductive ground plane is comprised of a plurality of interdigital fingers positioned around the raised portion of the dielectric substrate.
Inventors
- 👤 Calvin D Bates
- 👤 Joseph H Hartley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 10:57
CPC Classifications
H; H01; H01J; H01J23/00; H01J23/16; H01J23/24
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
115 words
A meander line slow wave circuit device comprising: a unitary dielectric planar support, said dielectric support having a raised surface portion, said raised surface portion being shaped to form a meander line having a plurality of transverse and longitudinal segments disposed at right angles to each other, the transverse segments being substantially sized in length to be equally disposed on either side of the longitudinal axis of said planar support; a conductive ground plane disposed on the upper surface of said dielectric support adjacent said raised portion of said dielectric to form a continuous planar surface surrounding said raised dielectric portion; and a conductor disposed on the upper surface portion of said raised dielectric portion.
Claim 2
Dependent Claim
115 words
A meander line slow wave circuit device comprising: a unitary dielectric planar support, said dielectric support having a raised surface portion, said raised surface portion being shaped to form a meander line having a plurality of transverse and longitudinal segments disposed at right angles to each other, the transverse segments being substantially sized in length to be equally disposed on either side of the longitudinal axis of said planar support; a conductive ground plane disposed on the upper surface of said dielectric support adjacent said raised portion of said dielectric to form a continuous planar surface surrounding said raised dielectric portion; and a conductor disposed on the upper surface portion of said raised dielectric portion.
Claim 3
Dependent Claim
43 words
A meander slow wave device, as in claim 1, wherein: said upper meander conductor is bonded to the upper surface of said raised dielectric surface portion, said conductor being separated from said ground plane a sufficient distance to provide proper RF signal matching.
Claim 4
Dependent Claim
23 words
A meander line slow wave device, as in claim 2, including: RF signal input and output means connected to the meander line conductor.
Claim 5
Dependent Claim
74 words
A meander line slow wave structure comprising: a planar shaped dielectric substrate; a dielectric meander shaped structure disposed on and protruding above the upper surface of said dielectric substrate; a meander line conductor mounted on the upper surface of said dielectric meander line structure; and a conductive ground plane mounted on the upper surface of said planar shaped dielectric substrate, said conductive ground plane having interdigital fingers extending about said dielectric meander shaped structure.
Claim 6
Dependent Claim
74 words
A meander line slow wave structure comprising: a planar shaped dielectric substrate; a dielectric meander shaped structure disposed on and protruding above the upper surface of said dielectric substrate; a meander line conductor mounted on the upper surface of said dielectric meander line structure; and a conductive ground plane mounted on the upper surface of said planar shaped dielectric substrate, said conductive ground plane having interdigital fingers extending about said dielectric meander shaped structure.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-09-08 | 1979-03-10 | 1979-09-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-08 | 1983-03-10 | 1983-09-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-08 | 1987-03-10 | 1987-09-09 | $7700.00 | Window Closed / Lapsed |