US3693038A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Traveling wave tube (twt) oscillation prevention device
Assignee: United States Department of the Navy
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Filing: 1971-05-03
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Granted: 1972-09-19
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Expires: 1991-05-03
Abstract
Abstract A traveling wave tube amplifier device which suppresses random oscillations through the entire length of the traveling wave tube. The solid side walls have a series of resonant slots which are structurally coupled to one another through the wall and lossy load along the entire length of the traveling wave tube. The slots are resonant at a frequency above the operating band of the tube, but below the lower edge of its stop band.
Inventors
- 👤 Allan W Scott
- 👤 Yukio Hiramatsu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 11:31
CPC Classifications
H; H01; H01J; H01J23/00; H01J23/16; H01J23/24; H01J23/30; H01J23/26; H01J23/27
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
133 words
A device for suppressing spurious oscillations along the entire length of a comb supported ring bar circuit, said ring bar circuit including a plurality of individually spaced convoluting diametrically opposed vertical walls attached between an upper and lower supporting means, said device comprising in combination: a. a rectangularly shaped continuously hollow means for propagating electromagnetic wave energy; b. said plurality of individually spaced vertical walls being spaced apart so as to form a plurality of separate partitions; c. said propagating means having vertical apertured sIde walls forming a plurality of resonant slots; and d. said propagating means being longitudinally and structurally coupled directly to said upper and lower supporting means so that said plurality of partitions directly oppose said plurality slots, slots said slots being coupled to one another through said hollow means.
Claim 2
Independent Claim
133 words
A device for suppressing spurious oscillations along the entire length of a comb supported ring bar circuit, said ring bar circuit including a plurality of individually spaced convoluting diametrically opposed vertical walls attached between an upper and lower supporting means, said device comprising in combination: a. a rectangularly shaped continuously hollow means for propagating electromagnetic wave energy; b. said plurality of individually spaced vertical walls being spaced apart so as to form a plurality of separate partitions; c. said propagating means having vertical apertured sIde walls forming a plurality of resonant slots; and d. said propagating means being longitudinally and structurally coupled directly to said upper and lower supporting means so that said plurality of partitions directly oppose said plurality slots, slots said slots being coupled to one another through said hollow means.
Claim 3
Dependent Claim
21 words
The device in claim 1 wherein said apertured side walls have an upper wall-portion and a lower wall-portion for each aperture.
Claim 4
Dependent Claim
28 words
The device in claim 2 wherein said propagating means is structurally coupled to said ring bar circuit at said upper wall and said lower wall of each aperture.
Claim 5
Dependent Claim
22 words
The device recited in claim 3 wherein said propagating means is an elongated hollow rectangular shell attached to said ring bar circuit.
Claim 6
Dependent Claim
25 words
The device recited in claim 4 wherein said hollow rectangular shell is a waveguide coupled to the vertical outside walls of said ring bar circuit.
Claim 7
Dependent Claim
20 words
The device recited in claim 4 wherein said shell has resonant slots on one side of said ring bar circuit.
Claim 8
Dependent Claim
20 words
The device recited in claim 6 wherein a said shell is located on both sides of said ring bar circuit.
Claim 9
Dependent Claim
25 words
The device recited in claim 5 wherein said hollow shell of said waveguide is coated with a ceramic attenuation material to form a lossy load.
Claim 10
Dependent Claim
22 words
The device recited in claim 8 wherein ceramic waveguide is brazed to top and bottom support structures of the ring bar circuit.
Claim 11
Dependent Claim
40 words
The device recited in claim 9 wherein said ring bar circuit is coupled to said waveguide said waveguide comprising a plurality of resonant slots with upper and lower slot portions operatively connected to the sidewalls of said ring bar circuit.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-09-19 | 1976-03-20 | 1976-09-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-09-19 | 1980-03-20 | 1980-09-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-09-19 | 1984-03-20 | 1984-09-19 | $7700.00 | Window Closed / Lapsed |