US3930182A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Traveling-wave tube having improved electron collector
Assignee: Licentia Patent Verwaltungs GmbH
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Filing: 1974-06-25
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Granted: 1975-12-30
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Expires: 1994-06-25
Abstract
Abstract In a traveling-wave tube composed of a periodic permanent magnet electron beam focusing device and an electron collector disposed downstream of the focusing device, relative to the direction of electron beam flow, and composed of two collector electrode arrangements disposed in succession along the beam path and electrically insulated from one another, a device producing an additional magnetic lens focusing field is disposed in the transition region between the two collector electrode arrangements to increase the energy efficiency of the tube and to render the energy loss substantially independent of the energy output level.
Inventors
- 👤 Jork Bretting
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-10 02:30
CPC Classifications
H; H01; H01J; H01J23/00; H01J23/02; H01J23/027; H01J23/0275
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
118 words
In a traveling-wave tube composed of a ppm electron beam focusing device and an electron collector disposed adjacent the focusing device and provided with two collector electrode arrangements disposed to enclose the electron beam over part of its path, said arrangements being spaced from one another by a transition region and being arranged in succession along the axis of the beam in the collector, the two arrangements being electrically insulated from one another, the improvement wherein said collector further comprises additional magnetic focusing lens field producing means disposed in the transition region between said two collector electrode arrangements and producing a concentrating field which refocuses the electrons in the beam in the region between said collector electrode arrangements.
Claim 2
Dependent Claim
118 words
In a traveling-wave tube composed of a ppm electron beam focusing device and an electron collector disposed adjacent the focusing device and provided with two collector electrode arrangements disposed to enclose the electron beam over part of its path, said arrangements being spaced from one another by a transition region and being arranged in succession along the axis of the beam in the collector, the two arrangements being electrically insulated from one another, the improvement wherein said collector further comprises additional magnetic focusing lens field producing means disposed in the transition region between said two collector electrode arrangements and producing a concentrating field which refocuses the electrons in the beam in the region between said collector electrode arrangements.
Claim 3
Dependent Claim
42 words
Traveling-wave tube as defined in claim 1 wherein that one of said collector electrode arrangements which is disposed closer to said focusing device has a length of five to 50 times the diameter of the electron beam entering this collector electrode arrangment.
Claim 4
Dependent Claim
21 words
Traveling-wave tube as defined in claim 2 wherein the length of said arrangement is 10 to 30 times such beam diameter.
Claim 5
Dependent Claim
19 words
Traveling-wave tube as defined in claim 3 wherein the length of said arrangement is 20 times such beam diameter.
Claim 6
Dependent Claim
35 words
Traveling-wave tube as defined in claim 1 wherein the maximum axial field intensity of the field produced by said field producing means is located in a plane which lies between said two collector electrode arrangements.
Claim 7
Dependent Claim
40 words
Traveling-wave tube as defined in claim 3 wherein the maximum axial field intensity of the field produced by said field producing means is 0.1 to 1 times the peak value of the beam focusing field produced in the ppm device.
Claim 8
Dependent Claim
31 words
Traveling-wave tube as defined in claim 6 wherein such maximum axial field intensity is 0.3 to 0.6 times the peak value of the beam focusing fIeld produced in the ppm device.
Claim 9
Dependent Claim
39 words
Traveling-wave tube as defined in claim 1 wherein the polarity of said additional focusing lens field is opposite to the polarity of that field peak which in the ppm beam focusing field device is closest to said electron collector.
Claim 10
Dependent Claim
24 words
Traveling-wave tube as defined in claim 1 wherein said field producing means comprises a permanent magnet arrangement for producing the additional focusing lens field.
Claim 11
Dependent Claim
21 words
Traveling-wave tube as defined in claim 9 wherein said permanent magnet arrangement comprises two coaxial and identically axially magnetized ring magnets.
Claim 12
Dependent Claim
17 words
Traveling-wave tube as defined in claim 1 wherein said electron collector has only two collector electrode arrangements.
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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) | 1978-12-29 | 1979-06-30 | 1979-12-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-12-29 | 1983-06-30 | 1983-12-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-12-29 | 1987-06-30 | 1987-12-30 | $7700.00 | Window Closed / Lapsed |