Patent US4801848A successfully refreshed from Google Patents.
US4801848A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tunable broadband source in millimeter wavelength range of spectrum
Assignee: Quantum Diagnostics Ltd
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Filing: 1987-05-11
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Granted: 1989-01-31
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Expires: 2007-05-11
Abstract
Abstract A tunable millimeter wave source in which accelerated electrons are directed into a bending magnet and emit broadband radiation in the millimeter wavelength portion of the spectrum. The electrons are produced by an electron gun using a portion of the microwave energy output from a RF source. The remainder of the microwave energy from the RF source is used to drive an RF linear accelerator which accelerates the electrons and directs them into the bending magnet. An interferometer may be used to select radiation of a particular frequency from the broadband output of the source. In a second embodiment, the source is provided with a plurality of output apertures, and a plurality of respective interferometers are used to select radiation of a number of desired discrete frequencies.
Inventors
- 👤 Curtis A. Birnbach
- 👤 Richard N. Heese
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 13:30
CPC Classifications
H; H01; H01J; H01J25/00; H01J25/02
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
70 words
An apparatus for producing broadband radiation, comprising: (a) means for generating microwave energy; (b) means for generating electrons; (c) means for accelerating said electrons using said microwave energy; (d) a bending magnet for bending the path of said accelerated electrons, whereby said accelerated electrons radiate broadband radiation; and (e) frequency selective means for receiving said broadband radiation and for producing radiation of a selected individual frequency from said broadband radiation.
Claim 2
Independent Claim
70 words
An apparatus for producing broadband radiation, comprising: (a) means for generating microwave energy; (b) means for generating electrons; (c) means for accelerating said electrons using said microwave energy; (d) a bending magnet for bending the path of said accelerated electrons, whereby said accelerated electrons radiate broadband radiation; and (e) frequency selective means for receiving said broadband radiation and for producing radiation of a selected individual frequency from said broadband radiation.
Claim 3
Dependent Claim
20 words
An apparatus as recited in claim 1, wherein a portion of said microwave energy is used to generate said electrons.
Claim 4
Dependent Claim
17 words
An apparatus as recited in claim 1, wherein said means for generating microwave energy comprises a magnetron.
Claim 5
Dependent Claim
46 words
An apparatus as recited in claim 3, wherein said RF source outputs microwave pulses having a power of about 5 megawatts per pulse and a frequency of about 3 gigahertz, at a rate of about 360 pulses per second, each pulse of about 4-5 microsecond duration.
Claim 6
Dependent Claim
17 words
An apparatus as recited in claim 1, wherein said means for generating electrons comprises an electron gun.
Claim 7
Dependent Claim
19 words
An apparatus as recited in claim 1, wherein said means for accelerating said electrons comprises a RF linear accelerator.
Claim 8
Dependent Claim
30 words
An apparatus as recited in claim 1, further comprising means for preventing substantial reflection of any standing waves produced in said accelerating means into said means for generating microwave energy.
Claim 9
Dependent Claim
20 words
An apparatus as recited in claim 1, further comprising a beam dump for terminating the travel of said accelerated electrons.
Claim 10
Dependent Claim
29 words
An apparatus as recited in claim 1, further comprising means for maintaining siad electron generating means, said accelerating means, said bending magnet and said beam dump under a vacuum.
Claim 11
Independent Claim
98 words
An apparatus for producing broadband radiation, comprising: (a) means for generating microwave energy; (b) means for generating electrons; (c) means for accelerating said electrons using said microwave energy; (d) a bending magnet for bending the path of said accelerated electrons, whereby said accelerated electrons radiate broadband radiation, said bending magnet having a plurality of apertures for outputting a plurality of beams of said broadband radiation; and (e) a plurality of frequency selective means, each for receiving one of said plurality of beams of broadband radiation and for producing radiation of respective selected individual frequencies from said broadband radiation.
Claim 12
Independent Claim
98 words
An apparatus for producing broadband radiation, comprising: (a) means for generating microwave energy; (b) means for generating electrons; (c) means for accelerating said electrons using said microwave energy; (d) a bending magnet for bending the path of said accelerated electrons, whereby said accelerated electrons radiate broadband radiation, said bending magnet having a plurality of apertures for outputting a plurality of beams of said broadband radiation; and (e) a plurality of frequency selective means, each for receiving one of said plurality of beams of broadband radiation and for producing radiation of respective selected individual frequencies from said broadband radiation.
Claim 13
Dependent Claim
20 words
An apparatus as recited in claim 10, wherein a portion of said microwave energy is used to generate said electrons.
Claim 14
Dependent Claim
17 words
An apparatus as recited in claim 11, wherein said means for generating microwave energy comprises a magnetron.
Claim 15
Dependent Claim
17 words
An apparatus as recited in claim 10, wherein said means for generating electrons comprises an electron gun.
Claim 16
Dependent Claim
19 words
An apparatus as recited in claim 10, wherein said means for accelerating said electrons comprises a RF linear accelerator.
Claim 17
Independent Claim
68 words
A method for producing broadband radiation, comprising the steps of: (a) generating microwave energy; (b) producing electrons; (c) directing said microwave energy to an electron accelerating means which accelerates said electrons; (d) directing said accelerated electrons to a bending magnet that bends the path of said accelerated electrons, thereby producing broadband radiation from said accelerated electrons; and (e) selecting radiation of a particular frequency from said broadband radiation.
Claim 18
Independent Claim
68 words
A method for producing broadband radiation, comprising the steps of: (a) generating microwave energy; (b) producing electrons; (c) directing said microwave energy to an electron accelerating means which accelerates said electrons; (d) directing said accelerated electrons to a bending magnet that bends the path of said accelerated electrons, thereby producing broadband radiation from said accelerated electrons; and (e) selecting radiation of a particular frequency from said broadband radiation.
Claim 19
Dependent Claim
23 words
A method as recited in claim 15, further comprising the step of selecting radiation of a plurality particular frequencies from said broadband radiation.
Claim 20
Dependent Claim
23 words
A method as recited in claim 15, further comprising the step of using a portion of said microwave energy to produce said electrons.
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) | 1992-01-31 | 1992-08-01 | 1993-01-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-01-31 | 1996-08-01 | 1997-01-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-01-31 | 2000-08-01 | 2001-01-31 | $7700.00 | Window Closed / Lapsed |