US3789257A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coherent microwave generators
Assignee: United States Department of the Navy
•
Filing: 1972-11-14
•
Granted: 1974-01-29
•
Expires: 1992-11-14
Abstract
Abstract A device for producing intense electromagnetic radiation from the interaction of an intense relativistic electron beam and a spatially modulated magnetic field in combination with a homogenous magnetic field region. The device is magnetically tuneable and capable of producing high level radiation of narrow or wide bandwidth over an extremely large range of wavelengths. The device produces microwave energy of the order of 108 to 109 watts in the 3 cm to 1 mm wavelength region with a secondary objective to produce electromagnetic energy of the order of 108 watts at wavelengths shorter than 1 mm.
Inventors
- 👤 M Friedman
- 👤 M Herndon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 22:16
CPC Classifications
H; H03; H03B; H03B13/00; H01; H01J; H01J25/00; H01J25/34; H01S; H01S1/00; H01S1/005
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
115 words
A coherent microwave generator which comprises: a centrally positioned coaxially aligned waveguide, means disposed coaxially about the length of said waveguide for providing a magnetic field paralleling the axis of said waveguide, a magnetic field modulating structure positioned around and along a portion of said waveguide within said magnetic field for modulating the magnetic field along a linear region of said waveguide, a homogeneous field region in axial alignment and adjacent said modulated magnetic field region, means for projecting high energy electrons into said waveguide along the axis thereof, whereby the electrons on passing through said modulated magnetic field region and said homogeneous magnetic field region experience forces which causes them to emit microwave radiation.
Claim 2
Dependent Claim
115 words
A coherent microwave generator which comprises: a centrally positioned coaxially aligned waveguide, means disposed coaxially about the length of said waveguide for providing a magnetic field paralleling the axis of said waveguide, a magnetic field modulating structure positioned around and along a portion of said waveguide within said magnetic field for modulating the magnetic field along a linear region of said waveguide, a homogeneous field region in axial alignment and adjacent said modulated magnetic field region, means for projecting high energy electrons into said waveguide along the axis thereof, whereby the electrons on passing through said modulated magnetic field region and said homogeneous magnetic field region experience forces which causes them to emit microwave radiation.
Claim 3
Dependent Claim
20 words
A coherent microwave generator as claimed in claim 1; wherein, said means for providing a magnetic field is a solenoid.
Claim 4
Dependent Claim
38 words
A coherent microwave generator as claimed in claim 2; in which, said magnetic field modulating structure includes side-by-side axially aligned rings made of magnetic and nonmagnetic materials alternately positioned around said waveguide in said magnetic field modulating region.
Claim 5
Dependent Claim
29 words
A coherent microwave generator as claimed in claim 3; wherein, said magnetic field is vAriable, whereby the frequency of the rf radiation is governed by the magnetic field intensity.
Claim 6
Dependent Claim
19 words
A coherent microwave generator as claimed in claim 4; wherein, said rings of magnetic material are made or iron.
Claim 7
Dependent Claim
19 words
A coherent microwave generator as claimed in claim 5; wherein, said rings of nonmagnetic material are made of aluminum.
Claim 8
Dependent Claim
20 words
A coherent microwave generator as claimed in claim 6; wherein, said electrons projected into said waveguide are a hollow beam.
References Cited (Backward Citations)
US2942144A
Cited
US3129356A
Cited
US3102211A
Cited
US3254261A
Cited
US3206635A
Cited
US3353053A
Cited
US3259786A
Cited
US3457450A
Cited
US3489943A
Cited
US3474283A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-01-28 | 1977-07-30 | 1978-01-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-28 | 1981-07-30 | 1982-01-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-28 | 1985-07-30 | 1986-01-29 | $7700.00 | Window Closed / Lapsed |