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US3686669A
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Detection and classification system utilizing unipolar pulses
Assignee: Individual
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Filing: 1970-04-24
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Granted: 1972-08-22
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Expires: 1990-04-24
Abstract
Abstract A detection and classification system utilizing a transmitter to generate a successive series of unipolar pulses which are then radiated into propagation space by a directional radiator; a receiving system to detect with an antenna and amplifier the especially distinctive low-frequency returns which are then filtered, processed and recorded in order to reconstruct and thus to classify the signal returns.
Inventors
- 👤 William J Toulis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:38
CPC Classifications
G; G01; G01S; G01S13/00; G01S13/02; G01S13/0209
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
53 words
A detection and classification system utilizing unipolar pulses comprising: directional unipolar pulse transmitting means with radiated energy in limited parts of frequency spectrum; receiving means adapted for receiving target signal returns in broad frequency spectrum resulting from pulses transmitted by said directional unipolar transmitting means; and readout means coupled to said receiving means.
Claim 2
Dependent Claim
53 words
A detection and classification system utilizing unipolar pulses comprising: directional unipolar pulse transmitting means with radiated energy in limited parts of frequency spectrum; receiving means adapted for receiving target signal returns in broad frequency spectrum resulting from pulses transmitted by said directional unipolar transmitting means; and readout means coupled to said receiving means.
Claim 3
Dependent Claim
23 words
The detection and classification system utilizing unipolar pulses of claim 1 wherein: said readout means includes a profile recorder and frequency spectrum analyzer.
Claim 4
Dependent Claim
22 words
The detection and classification system utilizinG unipolar pulses of claim 1 wherein: said readout means includes a form and frequency spectrum analyzer.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-08-22 | 1976-02-21 | 1976-08-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-22 | 1980-02-21 | 1980-08-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-22 | 1984-02-21 | 1984-08-22 | $7700.00 | Window Closed / Lapsed |