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US4460846A
Expired / Lapsed
US
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Collector-output for hollow beam electron tubes
Assignee: Communications and Power Industries LLC
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Filing: 1983-07-01
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Granted: 1984-07-17
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Expires: 2003-07-01
Abstract
Abstract In a microwave electron tube such as a gyrotron, a hollow beam of electrons passes thru the interaction cavity into an output waveguide carrying the generated energy in a mode with circular electric fields. According to the invention, the beam is caused to expand, passing thru a gap in the waveguide to be collected on a larger, surrounding collector. The collector energy is thus reduced. The wave energy jumps the gap and continues down the waveguide. Wave energy leaking into the collector may be absorbed by lossy material therein or be carried off by waveguides to external loads.
Inventors
- 👤 Norman J. Taylor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 05:49
CPC Classifications
H; H01; H01J; H01J23/00; H01J23/02; H01J23/027
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
88 words
In a gyrotron type microwave electron tube: means for generating a hollow beam of electrons; means for supporting an electromagnetic wave in energy exchanging interaction with said beam; circular waveguide means of generally uniform cross-section and coaxial with said beam for conducting energy from said interaction to an external load in a mode having circular electric fields; said waveguide defining therein a transverse gap for passage of said beam outwardly of said waveguide; and a hollow electron collector coaxial with and outside said waveguide, and surrounding said gap.
Claim 2
Dependent Claim
88 words
In a gyrotron type microwave electron tube: means for generating a hollow beam of electrons; means for supporting an electromagnetic wave in energy exchanging interaction with said beam; circular waveguide means of generally uniform cross-section and coaxial with said beam for conducting energy from said interaction to an external load in a mode having circular electric fields; said waveguide defining therein a transverse gap for passage of said beam outwardly of said waveguide; and a hollow electron collector coaxial with and outside said waveguide, and surrounding said gap.
Claim 3
Dependent Claim
25 words
The tube of claim 1 in which said means for supporting said electromagnetic wave includes a resonant cavity, resonating in a circular electric field mode.
Claim 4
Dependent Claim
27 words
The tube of claim 2 in which said cavity has a first diameter, and said waveguide means has a second diameter slightly larger than said first diameter.
Claim 5
Dependent Claim
12 words
The tube of claim 1 wherein said collector contains wave-absorbing dielectric material.
Claim 6
Dependent Claim
28 words
The tube of claim 1 further comprising a wave-transmissive dielectric window in said collector; and lossy dielectric material in wave-transmissive connection with said collector via said dielectric window.
Claim 7
Dependent Claim
12 words
The tube of claim 5 wherein said lossy dielectric material is water.
References Cited (Backward Citations)
US2486398A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-07-17 | 1988-01-16 | 1988-07-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-07-17 | 1992-01-16 | 1992-07-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-07-17 | 1996-01-16 | 1996-07-17 | $7700.00 | Window Closed / Lapsed |