Patent US4552151A successfully refreshed from Google Patents.
US4552151A
Expired / Lapsed
US
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Process and means for rapid point by point survey of body scanning radiation field
Assignee: D'ETUDE DU RADANT Ste
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Filing: 1984-12-05
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Granted: 1985-11-12
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Expires: 2004-12-05
Abstract
Abstract This invention relates to a process and means for rapid microwave imaging using UHF waves transmitted by an antenna toward a body to be scanned. According to the invention, body O to be scanned is placed in front of a transmitting antenna A and various signals forming the various points of the image are analyzed in a collector-unit RC consisting of a diode-conductor panel 1 and a wave-guide stack 2 and are then transmitted to a receiver R.
Inventors
- 👤 Jean-Charles Bolomey
- 👤 Yves Michel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:00
CPC Classifications
G; G01; G01N; G01N22/00
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
193 words
A system for rapid and point by point survey of a UHF radiation field having passed through a body, the system comprising: an antenna for transmitting UHF radiation to the body undergoing scanning; a stack of waveguides having coplanar apertures and positioned in radiation alignment with the antenna and at a distance therefrom sufficient for location of the body between the antenna and the stack, adjacent individual waveguides being spaced at a distance less than one wavelength; a panel having a plurality of parallel alternating columns of conductors and serially connected diodes biased in the same direction, adjacent diode columns being less than one wavelength apart; the columns being positioned parallel to the component of a radiation field vector to be measured; means for reverse biasing all of the diode columns except a single selected forward biased diode column thereby polarizing the selected diode column to impinging radiation; means for producing a signal in relation to the electromagnetic field at the orthogonal crossing of a selected column in the panel and a selected row in the stack of waveguides, which corresponds to a scanned point which is in registry with the orthogonal crossing.
Claim 2
Independent Claim
193 words
A system for rapid and point by point survey of a UHF radiation field having passed through a body, the system comprising: an antenna for transmitting UHF radiation to the body undergoing scanning; a stack of waveguides having coplanar apertures and positioned in radiation alignment with the antenna and at a distance therefrom sufficient for location of the body between the antenna and the stack, adjacent individual waveguides being spaced at a distance less than one wavelength; a panel having a plurality of parallel alternating columns of conductors and serially connected diodes biased in the same direction, adjacent diode columns being less than one wavelength apart; the columns being positioned parallel to the component of a radiation field vector to be measured; means for reverse biasing all of the diode columns except a single selected forward biased diode column thereby polarizing the selected diode column to impinging radiation; means for producing a signal in relation to the electromagnetic field at the orthogonal crossing of a selected column in the panel and a selected row in the stack of waveguides, which corresponds to a scanned point which is in registry with the orthogonal crossing.
Claim 3
Dependent Claim
59 words
The system set forth in claim 1 together with a multiplexer connected at its output to each of the diode columns; and means connected to an input of the multiplexer for providing a modulation signal thereto; and switching means connected between the multiplexer output and the diode columns for providing a modulated forward-back biasing signal to the diode columns.
Claim 4
Dependent Claim
31 words
The system set forth in claim 2 wherein each diode column becomes sequentially polarized with each waveguide of the stack for producing signals corresponding to individual points of a scanned body.
Claim 5
Independent Claim
229 words
A method for rapidly measuring, on a point by point basis, the radiation field having passed through a body, the steps comprising: (a) transmitting radiation from an antenna to a body undergoing scanning; (b) positioning a stack of waveguides having coplanar apertures in radiation alignment with the antenna and at a distance therefrom sufficient for location of the body between the antenna and the stack; (c) locating adjacent individual waveguides at a distance less than one wavelength apart; (d) positioning a diode array panel between the body and the waveguides, the panel having a plurality of parallel alternating columns of conductors and serially connected diodes biased in the same direction, adjacent diode columns being less than one wavelength apart; (e) positioning the columns parallel to the component of a radiation field vector to be measured; (f) reverse biasing all of the diode columns except a single selected forward biased column thereby polarizing the selected diode column to impinging radiation; and (g) producing a signal in relation to the electromagnetic field at the orthogonal crossing of a selected diode column in the panel and a selected row in the stack of waveguides, which corresponds to a scanned point which is in registry with the orthogonal crossing; (h) sequentially repeating steps (f) and (g) until all the orthogonal crossings between the diode columns and waveguides in the stack have been scanned.
Claim 6
Independent Claim
229 words
A method for rapidly measuring, on a point by point basis, the radiation field having passed through a body, the steps comprising: (a) transmitting radiation from an antenna to a body undergoing scanning; (b) positioning a stack of waveguides having coplanar apertures in radiation alignment with the antenna and at a distance therefrom sufficient for location of the body between the antenna and the stack; (c) locating adjacent individual waveguides at a distance less than one wavelength apart; (d) positioning a diode array panel between the body and the waveguides, the panel having a plurality of parallel alternating columns of conductors and serially connected diodes biased in the same direction, adjacent diode columns being less than one wavelength apart; (e) positioning the columns parallel to the component of a radiation field vector to be measured; (f) reverse biasing all of the diode columns except a single selected forward biased column thereby polarizing the selected diode column to impinging radiation; and (g) producing a signal in relation to the electromagnetic field at the orthogonal crossing of a selected diode column in the panel and a selected row in the stack of waveguides, which corresponds to a scanned point which is in registry with the orthogonal crossing; (h) sequentially repeating steps (f) and (g) until all the orthogonal crossings between the diode columns and waveguides in the stack have been scanned.
Claim 7
Dependent Claim
37 words
The method set forth in claim 4, wherein the antenna, body to be scanned, and waveguide stack are placed in the same ambient medium having a dielectric constant which is similar to that of the scanned body.
References Cited (Backward Citations)
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Cited
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FR2224887A1
Cited
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Cited
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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) | 1988-11-11 | 1989-05-13 | 1989-11-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-11-11 | 1993-05-13 | 1993-11-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-11-11 | 1997-05-13 | 1997-11-12 | $7700.00 | Window Closed / Lapsed |