Patent USH205H successfully refreshed from Google Patents.
USH205H
Expired / Lapsed
US
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Wide bandwidth radar having improved signal to clutter response characteristics
Assignee: United States Department of the Air Force
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Filing: 1984-02-09
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Granted: 1987-02-03
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Expires: 2004-02-09
Abstract
Abstract Improved signal to clutter response in a radar is achieved by transmitting broad bandwidth frequency modulated noise pulses. Utilization of millisecond pulse intervals enables the radar video processor to average the independent samples present in each echo pulse so that each pulse represents an estimate of the true average return from the background. The bandwidth of the IF processing circuit is equal to the RF circuit and transmitted pulse bandwidths.
Inventors
- 👤 George M. Green
- 👤 James R. Ashwell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 17:30
CPC Classifications
G; G01; G01S; G01S7/00; G01S7/02; G01S7/024; G01S7/026; G01S13/00; G01S13/02; G01S13/06; G01S13/08; G01S13/10; G01S13/26
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
105 words
A wide bandwidth radar having improved signal to clutter response comprising a radar signal pulse generating means generating a train of wide bandwidth non-coherent pulses, modulation means effecting wide bandwidth frequency modulation of said non-coherent pulses, transmit/receive means transmitting said train of frequency modulated pulses and receiving echo signals thereof, a wide bandwidth IF circuit providing IF processing of said received echo signals, and a video circuit including a detector means receiving said IF processed echo signals said detector means being effective to average the contents of each pulse thereof whereby each averaged pulse represents an estimate of the true average return from background clutter.
Claim 2
Dependent Claim
105 words
A wide bandwidth radar having improved signal to clutter response comprising a radar signal pulse generating means generating a train of wide bandwidth non-coherent pulses, modulation means effecting wide bandwidth frequency modulation of said non-coherent pulses, transmit/receive means transmitting said train of frequency modulated pulses and receiving echo signals thereof, a wide bandwidth IF circuit providing IF processing of said received echo signals, and a video circuit including a detector means receiving said IF processed echo signals said detector means being effective to average the contents of each pulse thereof whereby each averaged pulse represents an estimate of the true average return from background clutter.
Claim 3
Dependent Claim
27 words
A wide bandwidth radar as defined in claim 1 wherein the bandwidth of said transmitted pulses and the bandwidth of said IF processing circuit are substantially equal.
Claim 4
Dependent Claim
37 words
A wide bandwidth radar as defined in claim 2 wherein said modulator means effects a broad power spectral density, in said transmitted pulses and a randomly varying amplitude during the pulse interval of each echo signal pulse.
Claim 5
Dependent Claim
57 words
A wide bandwidth radar as defined in claim 3 wherein said radar signal pulse generating means comprises a K a band IMPATT noise generator producing approximately 1 microsecond pulses having a bandwidth of approximately 500 MHz, said IF circuit has a bandwidth of approximately 500 MHz and said video circuit has a bandwidth of approximately 250 MHz.
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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) | 1990-02-02 | 1990-08-04 | 1991-02-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-02-02 | 1994-08-04 | 1995-02-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-02-02 | 1998-08-04 | 1999-02-03 | $7700.00 | Window Closed / Lapsed |