US3659290A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for providing sensitivity-time control for radar receivers
Assignee: Lockheed Martin Corp
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Filing: 1970-08-03
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Granted: 1972-04-25
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Expires: 1990-08-03
Abstract
Abstract Sensitivity-time control for radar receivers is provided by arranging attenuators having attenuation values inversely proportional to range at the input lines of the range gate channels of the receiver.
Inventors
- 👤 Edward L Bourque
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 07:35
CPC Classifications
G; G01; G01S; G01S7/00; G01S7/02; G01S7/28; G01S7/285; G01S7/34
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
41 words
In a return echo range response system, apparatus including a receiver and a plurality of range gate channels coupled to said receiver, the improvement comprising a plurality of attenuators coupled between said receiver and respective ones of said range gate channels.
Claim 2
Dependent Claim
41 words
In a return echo range response system, apparatus including a receiver and a plurality of range gate channels coupled to said receiver, the improvement comprising a plurality of attenuators coupled between said receiver and respective ones of said range gate channels.
Claim 3
Dependent Claim
31 words
In a return echo range responsive system as defined in claim 1, wherein the attenuation values of said attenuators between said receiver and each of said range gate channels are different.
Claim 4
Dependent Claim
36 words
In a return echo range responsive system as defined in claim 2, wherein the relative attenuation values of said attenuators are inversely proportional to the range of signals to be processed at said range gate channels.
Claim 5
Dependent Claim
32 words
In a return echo range responsive system as defined in claim 1, wherein no attenuator is coupled to a range gate channel responsive to targets at the closest range to the system.
Claim 6
Dependent Claim
56 words
In a return echo range responsive system including a receiver and a plurality of range gate channels, said receiver having a multistage amplifier therein, the improvement comprising means for coupling said range gate channels to predetermined ones of the stages of said amplifier such that signals from predetermined different ranges will be amplified by different amounts.
Claim 7
Dependent Claim
56 words
In a return echo range responsive system including a receiver and a plurality of range gate channels, said receiver having a multistage amplifier therein, the improvement comprising means for coupling said range gate channels to predetermined ones of the stages of said amplifier such that signals from predetermined different ranges will be amplified by different amounts.
Claim 8
Dependent Claim
48 words
In a return echo range responsive system as defined in claim 5, said amplifier having n stages, wherein said range gate channel responsive to signals furthermost from said system is coupled to said nth stage, with other range gate channels being coupled to other stages of said amplifier.
Claim 9
Dependent Claim
33 words
In a return echo range responsive system as defined in claim 5, further including a plurality of attenuators coupling predetermined ones of said amplifier stages to predetermined ones of said range gate channels.
References Cited (Backward Citations)
US3149333A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-04-25 | 1975-10-25 | 1976-04-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-04-25 | 1979-10-25 | 1980-04-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-04-25 | 1983-10-25 | 1984-04-25 | $7700.00 | Window Closed / Lapsed |