US4356430A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gyrotron cavity resonator with an improved value of Q
Assignee: Communications and Power Industries LLC
•
Filing: 1980-09-05
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Granted: 1982-10-26
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Expires: 2000-09-05
Abstract
Abstract A gyrotron cavity resonator is connected smoothly and directly to an output waveguide with a very gradually tapered wall so that values of external Q lower than twice the diffraction limit are obtainable.
Inventors
- 👤 David S. Stone
- 👤 James F. Shively
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 07:10
CPC Classifications
H; H01; H01J; H01J25/00; H01J25/02; H01J25/025
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
92 words
A cavity resonator with a reduced Q value, said resonator having a longitudinal direction and an effective length along said direction, said resonator being connected to and directly opening into an output waveguide across a junction plane which is perpendicular to said direction, each segment of the inner wall of said output waveguide making an angle smaller than 20° with said direction, the Q value of said resonator being smaller than 8π(L/λ) 2 where L is said effective length and λ is the free-space wavelength of the cavity resonance inside said resonator.
Claim 2
Dependent Claim
92 words
A cavity resonator with a reduced Q value, said resonator having a longitudinal direction and an effective length along said direction, said resonator being connected to and directly opening into an output waveguide across a junction plane which is perpendicular to said direction, each segment of the inner wall of said output waveguide making an angle smaller than 20° with said direction, the Q value of said resonator being smaller than 8π(L/λ) 2 where L is said effective length and λ is the free-space wavelength of the cavity resonance inside said resonator.
Claim 3
Dependent Claim
24 words
The resonator of claim 1 wherein the cross-sectional area of said output waveguide parallel to said junction plane increases monotonically in said longitudinal direction.
Claim 4
Dependent Claim
12 words
The resonator of claim 1 wherein said angle is smaller than 10°.
Claim 5
Dependent Claim
15 words
The element of claim 1 which is circular in cross-section perpendicular to said longitudinal direction.
Claim 6
Dependent Claim
13 words
The element of claim 1 wherein said output waveguide is conical in shape.
Claim 7
Dependent Claim
10 words
The resonator of claim 1 which is elliptical in cross-section.
Claim 8
Dependent Claim
12 words
The resonator of claim 1 which is a part of a gyrotron.
References Cited (Backward Citations)
US2552334A
Cited
US2826713A
Cited
US2805337A
Cited
US2938179A
Cited
US3457450A
Cited
US4224576A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-10-25 | 1986-04-26 | 1986-10-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-10-25 | 1990-04-26 | 1990-10-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-10-25 | 1994-04-26 | 1994-10-26 | $7700.00 | Window Closed / Lapsed |