US3825863A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Microwave transmission line
Assignee: Cutler Hammer Inc
•
Filing: 1973-05-18
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Granted: 1974-07-23
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Expires: 1993-05-18
Abstract
Abstract A microwave transmission structure consisting of a hollow conductive waveguide with at least one film conductor supported on a dielectric substrate within the guide to provide a conductive surface projecting inwardly from the guide wall in the manner of a ridge in ridgeguide.
Inventors
- 👤 P Meier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 13:45
CPC Classifications
H; H01; H01P; H01P3/00; H01P3/12; H01P3/123
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
173 words
A microwave transmission line comprising: a. a hollow conductive waveguide adapted to operate in a mode having a transverse electric component, a dielectric substrate in the form of a sheet of such thickness and dielectric constant that the electric field is distributed principally in the space within the guide surrounding the dielectric, said substrate sheet having an edge secured to the inside of the waveguide wall with a surface extending inwardly of the guide away from the wall in a transverse direction across the guide and in the longitudinal direction of the guide over a distance substantially greater than the width of the guide in said transverse direction, c. a first conductor formed of film material supported on said substrate surface extending inwardly of the guide and terminating in an edge away from the waveguide wall, said first conductor being RF connected to the waveguide wall, and d. a second conductor RF connected to the waveguide wall within the guide and separated from said edge of the first conductor by a nonconductive gap.
Claim 2
Dependent Claim
173 words
A microwave transmission line comprising: a. a hollow conductive waveguide adapted to operate in a mode having a transverse electric component, a dielectric substrate in the form of a sheet of such thickness and dielectric constant that the electric field is distributed principally in the space within the guide surrounding the dielectric, said substrate sheet having an edge secured to the inside of the waveguide wall with a surface extending inwardly of the guide away from the wall in a transverse direction across the guide and in the longitudinal direction of the guide over a distance substantially greater than the width of the guide in said transverse direction, c. a first conductor formed of film material supported on said substrate surface extending inwardly of the guide and terminating in an edge away from the waveguide wall, said first conductor being RF connected to the waveguide wall, and d. a second conductor RF connected to the waveguide wall within the guide and separated from said edge of the first conductor by a nonconductive gap.
Claim 3
Dependent Claim
30 words
A microwave transmission line as recited in claim 1, wherein the gap width is different at different regions along the line to provide respective different impedance levels in said regions.
Claim 4
Dependent Claim
30 words
A transmission line as recited in claim 2, wherein said substrate is a planar sheet and said second conductor is a second film conductor supported on said dielectric substrate surface.
Claim 5
Dependent Claim
92 words
A microwave transmission line as recited in claim 3, further comprising: a. an RF choke including outwardly extending flanges to mount the dielectric substrate and maintain RF connection of the conductors to the waveguide wall and RF continuity of the waveguide wall, said flanges being located along a longitudinal division in the waveguide wall, b. a second dielectric substrate located between said film conductors and said flanges to provide dc isolation of the film conductors from each other and from the flanges, whereby said film conductors can be used as bias conductors.
Claim 6
Dependent Claim
37 words
A microwave transmission line as recited in claim 2, wherein said substrate is a planar sheet, said second conductor is a second film conductor supported on the opposite side of said substrate from the first film conductor.
Claim 7
Dependent Claim
89 words
A transmission line as recited in claim 5, further comprising an RF choke including outwardly extending flanges used to mount the dielectric and provide RF connection of the film conductors to the waveguide wall and RF continuity of the waveguide wall, said flange being located along two longitudinal divisions made in opposite walls of the guide which divide the guide in two segments, direct connection being made by each film conductor to a separate segment of the waveguide wall, whereby said film conductors can be used as bias conductors.
Claim 8
Dependent Claim
30 words
A microwave transmission line as claimed in claim 1, wherein said waveguide is rectangular and said dielectric substrate is perpendicular to a broad wall near the center of the guide.
References Cited (Backward Citations)
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Cited
US2591329A
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US2921263A
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US3760302A
Cited
US3649935A
Cited
US3732508A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-07-22 | 1978-01-21 | 1978-07-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-07-22 | 1982-01-21 | 1982-07-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-07-22 | 1986-01-21 | 1986-07-23 | $7700.00 | Window Closed / Lapsed |