Patent US4872014A successfully refreshed from Google Patents.
US4872014A
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Object identification system and method utilizing radiometry
Assignee: Lockheed Martin Corp
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Filing: 1985-01-31
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Granted: 1989-10-03
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Expires: 2005-01-31
Abstract
Abstract The totally passive object identification system and method involves the use of a radiometer to produce a signal corresponding to the radiation pattern generated by an object of interest in the frequency band to which the radiometer is sensitive, and involves comparing the produced signal with a signal corresponding to a given class of objects. The comparator produces a signal indicative of correspondence or a lack of correspondence between the object of interest and the given class of objects.
Inventors
- 👤 Markus Nowogrodzki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 01:45
CPC Classifications
G; G01; G01K; G01K11/00; G01K11/006; G01S; G01S13/00; G01S13/86
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
116 words
A method for use in distinguishing one class of objects from another class of objects distinguished by differences in their response patterns by use of a radiometer comprises the steps of: ensuring the existence on said one class of objects of a structure having at least one resonance at a frequency not present in the radiometric signal response from the other class of objects; receiving at the radiometer a radiation pattern signal emanated from an object of interest; comparing the received radiation pattern signal against a stored radiation pattern signal corresponding to the radiation signal pattern from the one class of objects; and producing a signal indicating a correspondence or lack of correspondence between the signals.
Claim 2
Independent Claim
116 words
A method for use in distinguishing one class of objects from another class of objects distinguished by differences in their response patterns by use of a radiometer comprises the steps of: ensuring the existence on said one class of objects of a structure having at least one resonance at a frequency not present in the radiometric signal response from the other class of objects; receiving at the radiometer a radiation pattern signal emanated from an object of interest; comparing the received radiation pattern signal against a stored radiation pattern signal corresponding to the radiation signal pattern from the one class of objects; and producing a signal indicating a correspondence or lack of correspondence between the signals.
Claim 3
Dependent Claim
125 words
Apparatus for distinguishing one class of objects from another class of objects distinguished by differences in their electromagnetic radiation patterns, comprising in combination; means placed on said one class of objects having at least one resonance at a frequency within the radiometric signal response of said means for producing a signal not present in the response from the other class of objects; means for producing a signal corresponding to the radiation pattern radiated from an object of interest; means receptive of the signal and receptive of a stored signal corresponding to a detected radiation pattern from an object of said one class; and means indicating a correspondence or lack of correspondence of the object of interest as belonging or not belonging to said one class.
Claim 4
Dependent Claim
125 words
Apparatus for distinguishing one class of objects from another class of objects distinguished by differences in their electromagnetic radiation patterns, comprising in combination; means placed on said one class of objects having at least one resonance at a frequency within the radiometric signal response of said means for producing a signal not present in the response from the other class of objects; means for producing a signal corresponding to the radiation pattern radiated from an object of interest; means receptive of the signal and receptive of a stored signal corresponding to a detected radiation pattern from an object of said one class; and means indicating a correspondence or lack of correspondence of the object of interest as belonging or not belonging to said one class.
Claim 5
Dependent Claim
20 words
The combination as set forth in claim 2 wherein said apparatus is sensitive to radiation in the microwave frequency band.
Claim 6
Dependent Claim
24 words
The combination as set forth in claim 3 wherein each of said objects includes an antenna which is resonant in the microwave frequency band.
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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) | 1992-10-02 | 1993-04-03 | 1993-10-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-10-02 | 1997-04-03 | 1997-10-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-10-02 | 2001-04-03 | 2001-10-03 | $7700.00 | Window Closed / Lapsed |