US3753031A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Output devices for microwave tubes such as klystrons, and klystrons incorporating such output devices
Assignee: Thales SA
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Filing: 1972-04-26
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Granted: 1973-08-14
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Expires: 1992-04-26
Abstract
Abstract Output devices for microwave tubes such as klystrons comprising an auxiliary coaxial line parallel to the direction of the electron beam in the tube, and connected between the output coupling loop which picks off the power from the tube, and a coaxial line section which constitutes the output line to which the load circuit is connected. The length of said auxiliary coaxial line determines the location of the output section. This device can in particular be used in klystrons and especially klystrons employing magnetic focussing.
Inventors
- 👤 P Aucouturier
- 👤 J Hervier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 12:16
CPC Classifications
H; H01; H01J; H01J23/00; H01J23/005; H01J23/36; H01J23/40; H01J23/46
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
184 words
An output device for microwave tubes such as klystrons, for picking off the high-frequency power delivered by the tube functioning within a wavelength range extending around a mean wavelength L, which device comprises an output Coupling loop arranged on said tube, a section of coaxial output line outside said tube and connected to a load circuit in which said power is utilized, and a vacuum-tight isolating window which provides a seal between the body of the evacuated tube and the load circuit and, an auxiliary coaxial line connecting said coaxial output line and said output coupling loop, said auxiliary coaxial line being parallel to the direction of the electron beam propagating within the tube and having a length substantially equal to (2n + 3) L/4, where n is a whole number, said auxiliary coaxial line being short-circuited at its two ends, said output coupling loop and said coaxial output line respectively being connected to said auxiliary coaxial line at distances substantially equal to L/4 from its two ends and said coaxial output line being oriented in a direction perpendicular to said auxiliary coaxial line.
Claim 2
Dependent Claim
184 words
An output device for microwave tubes such as klystrons, for picking off the high-frequency power delivered by the tube functioning within a wavelength range extending around a mean wavelength L, which device comprises an output Coupling loop arranged on said tube, a section of coaxial output line outside said tube and connected to a load circuit in which said power is utilized, and a vacuum-tight isolating window which provides a seal between the body of the evacuated tube and the load circuit and, an auxiliary coaxial line connecting said coaxial output line and said output coupling loop, said auxiliary coaxial line being parallel to the direction of the electron beam propagating within the tube and having a length substantially equal to (2n + 3) L/4, where n is a whole number, said auxiliary coaxial line being short-circuited at its two ends, said output coupling loop and said coaxial output line respectively being connected to said auxiliary coaxial line at distances substantially equal to L/4 from its two ends and said coaxial output line being oriented in a direction perpendicular to said auxiliary coaxial line.
Claim 3
Dependent Claim
58 words
An output device for a microwave tube according to claim 1, further comprising an intermediate coaxial line section whose center conductor is connected to said output coupling loop and to the center conductor of said auxiliary coaxial line, the center conductor of said coaxial output line being itself connected to said central conductor of said auxiliary coaxial line.
Claim 4
Dependent Claim
27 words
An output device for a microwave tube according to claim 1, wherein a cooling fluid circuit is established through the center conductor of said auxiliary coaxial line.
Claim 5
Dependent Claim
57 words
An output device for a microwave tube according to claim 3, wherein said cooling fluid arriving in the center conductor of said auxiliary coaxial line circulates through said output coupling loop constituted by two series-arranged hollow tubes and through the center conductor of said coaxial output line before leaving said center conductor of said auxiliary coaxial line.
Claim 6
Dependent Claim
25 words
An output device for a microwave tube according to claim 1, wherein the ends of said auxiliary coaxial line are short-circuited by adjustable short-circuiting pistons.
Claim 7
Dependent Claim
97 words
An output device for a microwave tube according to claim 1, wherein the focussing of the electron beam propagating within said tube is effected by magnetic coils the ends of which are terminated by polepieces, said coils surrounding the assembly of the tube body and that end of said auxiliary coaxial line connected to said output coupling loop, the polepiece adjacent said output device having a hole at the location of said auxiliary coaxial line, and a soft iron sleeve surrounding said auxiliary coaxial line from and beyond said polepiece at the side opposite to said coils.
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) | 1976-08-13 | 1977-02-12 | 1977-08-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-13 | 1981-02-12 | 1981-08-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-13 | 1985-02-12 | 1985-08-14 | $7700.00 | Window Closed / Lapsed |