Patent US3918010A successfully refreshed from Google Patents.
US3918010A
Expired / Lapsed
US
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Optimized rectangular wave guide to circular wave guide coupler
Assignee: Alcatel CIT SA
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Filing: 1974-11-14
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Granted: 1975-11-04
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Expires: 1994-11-14
Abstract
Abstract Optimized rectangular wave guide to circular wave guide coupler making it possible to favor, in one version, the circular TE01 mode and in the other version, the circular TE02 mode, wherein a tongue constituted by a sector portion has a constant arc diametrically opposite to the coupling holes and joined by a sector portion opening out progressively from a fine ridge in the absence of the coupling holes. In the TE01 version, the sector having a constant opening has an arc of 60* and in the TE02 version, 90*.
Inventors
- 👤 Jean-Noel Marchalot
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 09:01
CPC Classifications
H; H01; H01P; H01P1/00; H01P1/16; H01P1/163
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
144 words
In an optimized rectangular wave guide to circular wave guide coupler set parallel to each other and one on top of another and including coupling holes within the rectangular wave guide on a generatrix of the circular wave guide, said coupling holes being arranged on either side of the middle of the length of the circular wave guide over a part of the length of that guide, the improvement wherein: said circular wave guide comprises, a metallic tongue whose cross-section opposite the coupling holes is a constant arc and full sector portion whose arc is diametrically opposite to the said coupling holes and whose cross-section outside the coupling holes is a sector portion progressively reduced to a fine line ridge at the ends of the circular wave guide, with said tongue attenuating propagation modes other than TE01 or TE02 in the circular wave guide.
Claim 2
Dependent Claim
144 words
In an optimized rectangular wave guide to circular wave guide coupler set parallel to each other and one on top of another and including coupling holes within the rectangular wave guide on a generatrix of the circular wave guide, said coupling holes being arranged on either side of the middle of the length of the circular wave guide over a part of the length of that guide, the improvement wherein: said circular wave guide comprises, a metallic tongue whose cross-section opposite the coupling holes is a constant arc and full sector portion whose arc is diametrically opposite to the said coupling holes and whose cross-section outside the coupling holes is a sector portion progressively reduced to a fine line ridge at the ends of the circular wave guide, with said tongue attenuating propagation modes other than TE01 or TE02 in the circular wave guide.
Claim 3
Dependent Claim
64 words
The optimized coupler according to claim 1, wherein: the circular wave guide favors the TE01 mode and is such that its diameter is less than the length necessary for the propagation of the TE02 mode, the coupling length is such that it attenuates modes other than the TE01 mode and the arc of the said constant arc sector portion is equal to 60* .
Claim 4
Dependent Claim
61 words
The optimized coupler according to claim 1, wherein: the circular wave guide favors the TE02 mode and is such that its diameter is sufficiently great to allow the TE02 mode to pass, the coupling length makes it possible to attenuate modes other than the TE02 mode and the arc of the said constant arc sector portion is equal to 90* .
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) | 1978-11-03 | 1979-05-05 | 1979-11-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-11-03 | 1983-05-05 | 1983-11-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-11-03 | 1987-05-05 | 1987-11-04 | $7700.00 | Window Closed / Lapsed |