US3944946A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coherent generation of microwaves by stimulated Raman emissions
Assignee: Individual
•
Filing: 1974-11-15
•
Granted: 1976-03-16
•
Expires: 1994-11-15
Abstract
Abstract The generation of controlled, electromagnetic, coherent, microwave radiation from a warm, uniform plasma at approximately twice the plasma frequency by means of a source of high energy electrons being directed into a plasma and coupling the resultant energy from a cavity resonator to external circuitry.
Inventors
- 👤 Balram Prasad
- 👤 Clare C. Leiby, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 02:02
CPC Classifications
H; H01; H01S; H01S3/00; H01S3/30
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
72 words
A method of generating controlled, coherent microwave radiation from a warm, uniform plasma at approximately twice the plasma frequency comprising the steps of directing high energy electrons into a plasma to excite longitudinal electrostatic waves in the plasma such that the energy density level of the said waves is sufficient to stimulate transverse electromagnetic wave radiation at approximately twice the plasma frequency and coupling said electromagnetic energy for use in appropriate circuitry.
Claim 2
Independent Claim
72 words
A method of generating controlled, coherent microwave radiation from a warm, uniform plasma at approximately twice the plasma frequency comprising the steps of directing high energy electrons into a plasma to excite longitudinal electrostatic waves in the plasma such that the energy density level of the said waves is sufficient to stimulate transverse electromagnetic wave radiation at approximately twice the plasma frequency and coupling said electromagnetic energy for use in appropriate circuitry.
Claim 3
Dependent Claim
99 words
A means for producing controlled, electromagnetic, coherent, microwave radiation from a warm, uniform plasma at approximately twice the plasma frequency comprising a source of high energy electrons, a plasma having its electron density at least twenty times the electron density from said source and coupled to said source for receiving high energy electrons therefrom to produce an electromagnetic wave output, the collision frequency of electrons from said source and said plasma being considerably lower than the plasma frequency to inhibit damping of the electromagnetic wave output and means for coupling the stimulated energy from said plasma for its utilization.
Claim 4
Dependent Claim
99 words
A means for producing controlled, electromagnetic, coherent, microwave radiation from a warm, uniform plasma at approximately twice the plasma frequency comprising a source of high energy electrons, a plasma having its electron density at least twenty times the electron density from said source and coupled to said source for receiving high energy electrons therefrom to produce an electromagnetic wave output, the collision frequency of electrons from said source and said plasma being considerably lower than the plasma frequency to inhibit damping of the electromagnetic wave output and means for coupling the stimulated energy from said plasma for its utilization.
Claim 5
Dependent Claim
32 words
A device as defined in claim 2 wherein the energy level of plasma oscillation is sufficiently high to cause intensification of microwave radiation from said plasma at approximately twice its plasma frequency.
Claim 6
Independent Claim
79 words
An apparatus for generating controlled coherent microwave radiation from a plasma at twice the plasma frequency comprising a source of high energy electrons, a plasma, means forming a part of said source for directing said electrons into said plasma to excite longitudinal electrostatic waves in said plasma such that the energy density level of said waves is sufficient to stimulate transverse electromagnetic wave radiation at approximately twice the plasma frequency, and means for coupling said energy from said plasma.
Claim 7
Independent Claim
79 words
An apparatus for generating controlled coherent microwave radiation from a plasma at twice the plasma frequency comprising a source of high energy electrons, a plasma, means forming a part of said source for directing said electrons into said plasma to excite longitudinal electrostatic waves in said plasma such that the energy density level of said waves is sufficient to stimulate transverse electromagnetic wave radiation at approximately twice the plasma frequency, and means for coupling said energy from said plasma.
References Cited (Backward Citations)
US2712069A
Cited
GB729676A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-03-16 | 1979-09-15 | 1980-03-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-03-16 | 1983-09-15 | 1984-03-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-03-16 | 1987-09-15 | 1988-03-16 | $7700.00 | Window Closed / Lapsed |