Patent US4286230A successfully refreshed from Google Patents.
US4286230A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Near millimeter wave generator with dielectric cavity
Assignee: United States Department of the Army
•
Filing: 1980-01-10
•
Granted: 1981-08-25
•
Expires: 2000-01-10
Abstract
Abstract A high frequency electromagnetic wave generator is disclosed which comprises an electron gun which directs an electron beam through a region generally adjacent a diffraction grating. The grating cooperates with an opposed reflecting surface to produce a standing electromagnetic wave. The reflector comprises a highly reflective dielectric coated mirror. Supporting means for the diffraction grating may also comprise a reflective dielectric surface.
Inventors
- 👤 Clyde A. Morrison
- 👤 Donald E. Wortman
- 👤 Richard P. Leavitt
- 👤 Nick Karayianis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 16:52
CPC Classifications
H; H01; H01J; H01J25/00; H01J25/34; H01J25/36
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
55 words
Apparatus to generate radiation comprising; means to generate a beam of electrons; a diffraction grating generally adjacent the path of said electron beam; and a reflector means cooperating with said diffraction grating to set up a standing electromagnetic wave pattern through which the electron beam passes; wherein said reflector means comprises substantially only dielectric materials.
Claim 2
Dependent Claim
55 words
Apparatus to generate radiation comprising; means to generate a beam of electrons; a diffraction grating generally adjacent the path of said electron beam; and a reflector means cooperating with said diffraction grating to set up a standing electromagnetic wave pattern through which the electron beam passes; wherein said reflector means comprises substantially only dielectric materials.
Claim 3
Dependent Claim
19 words
Apparatus as in claim 1, wherein said reflector means comprises a dielectric base member having selected dielectric coatings thereon.
Claim 4
Dependent Claim
19 words
Apparatus as in claim 2, wherein the coatings are so chosen as to reflect radiation of a selected wavelength.
Claim 5
Dependent Claim
36 words
Apparatus as in claim 3, wherein said coatings comprise alternate layers of differing dielectric materials, the thickness of each of said layers being substantially equal to one-fourth of said selected wavelength in the respective dielectric medium.
Claim 6
Dependent Claim
22 words
Apparatus as in claim 2, further comprising output means for radiation generated by said apparatus, said output means comprising a dielectric waveguide.
Claim 7
Dependent Claim
33 words
Apparatus as in claim 5, wherein said dielectric waveguide is operatively connected to the base of said reflector means, a portion of said base member adjacent said waveguide being free of said coatings.
Claim 8
Dependent Claim
26 words
Apparatus as in claim 1, wherein said diffraction grating is embedded in a dielectric base having a surface highly reflective of radiation of a selected wavelength.
Claim 9
Dependent Claim
36 words
Apparatus as in claim 7, wherein said surface comprises alternate layers of differing dielectric materials, the thickness of each of said layers being substantially equal to one-fourth of said selected wavelength in the respective dielectric medium.
References Cited (Backward Citations)
US2634372A
Cited
US4074211A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-08-24 | 1985-02-23 | 1985-08-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-08-24 | 1989-02-23 | 1989-08-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-08-24 | 1993-02-23 | 1993-08-25 | $7700.00 | Window Closed / Lapsed |