US4219818A
Expired / Lapsed
US
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Radar system
Assignee: Boeing North American Inc
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Filing: 1956-12-05
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Granted: 1980-08-26
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Expires: 1976-12-05
Abstract
Abstract 1. A radar system comprising means for radiating pulse-modulated electromagnetic energy, means for receiving said energy after reflection from a target, means for generating pulses, said generated pulses being applied to said radiating means for control of the radiated energy therefrom, near and far pulse gate generators each producing a pulse during a discrete time interval between successive pulses of said radiated energy and during which reflected energy may be received, said time intervals not exceeding the time corresponding to the maximum range of said radar system, said pulse generating means being coupled to said gate generators for triggering thereof, a pulse distributor, said pulse distributor being coupled to the output from said receiving means and to said gate generators whereby said pulse distributor applies said receiving means output occurring during one gate interval to one output line and that occurring during the other gate interval to another output line, a pair of averaging means, each said averaging means connected to one of said pulse distributor output lines, a differential amplifier receiving the outputs from each of said averaging means and supplying an output proportional to the differential amplitude therebetween, said amplifier being adapted to produce a zero output in the absence of reflected energy being received during either of said near and far gate intervals and in the presence of reflected energy during one of said gate intervals being adapted to produce an output having a finite value with a polarity indicative of which of the two said gate intervals is coincident with said reflected energy reception.
Inventors
- 👤 George F. Mansur, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 18:17
CPC Classifications
G; G01; G01S; G01S13/00; G01S13/02; G01S13/06; G01S13/08; G01S13/10; G01S13/22; G01S13/222; G01S13/18; G01S7/00; G01S7/02; G01S7/36
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
256 words
A radar system comprising means for radiating pulse-modulated electromagnetic energy, means for receiving said energy after reflection from a target, means for generating pulses, said generated pulses being applied to said radiating means for control of the radiated energy therefrom, near and far pulse gate generators each producing a pulse during a discrete time interval between successive pulses of said radiated energy and during which reflected energy may be received, said time intervals not exceeding the time corresponding to the maximum range of said radar system, said pulse generating means being coupled to said gate generators for triggering thereof, a pulse distributor, said pulse distributor being coupled to the output from said receiving means and to said gate generators whereby said pulse distributor applies said receiving means output occurring during one gate interval to one output line and that occuring during the other gate interval to another output line, a pair of averaging means, each said averaging means connected to one of said pulse distributor output lines, a differential amplifier receiving the outputs from each of said averaging means and supplying an output proportional to the differential amplitude therebetween, said amplifier being adapted to produce zero output in the absence of reflected energy being received during either of said near and far gate intervals and in the presence of reflected energy during one of said gate intervals being adapted to produce an output having a finite value with a polarity indicative of which of the two said gate intervals is coincident with said reflected energy reception.
Claim 2
Dependent Claim
256 words
A radar system comprising means for radiating pulse-modulated electromagnetic energy, means for receiving said energy after reflection from a target, means for generating pulses, said generated pulses being applied to said radiating means for control of the radiated energy therefrom, near and far pulse gate generators each producing a pulse during a discrete time interval between successive pulses of said radiated energy and during which reflected energy may be received, said time intervals not exceeding the time corresponding to the maximum range of said radar system, said pulse generating means being coupled to said gate generators for triggering thereof, a pulse distributor, said pulse distributor being coupled to the output from said receiving means and to said gate generators whereby said pulse distributor applies said receiving means output occurring during one gate interval to one output line and that occuring during the other gate interval to another output line, a pair of averaging means, each said averaging means connected to one of said pulse distributor output lines, a differential amplifier receiving the outputs from each of said averaging means and supplying an output proportional to the differential amplitude therebetween, said amplifier being adapted to produce zero output in the absence of reflected energy being received during either of said near and far gate intervals and in the presence of reflected energy during one of said gate intervals being adapted to produce an output having a finite value with a polarity indicative of which of the two said gate intervals is coincident with said reflected energy reception.
Claim 3
Dependent Claim
214 words
A radar system comprising means for radiating radio frequency pulses, means for receiving reflected radiated energy, a pair of delayed gate-pulse generators triggered by said radiated pulses and producing first and second gate pulses during time intervals between successive ones of said radiated pulses and during which said reflected radiated energy may be received, said time intervals not exceeding the time corresponding to the maximum range of said radar system, distributor means connected to the output of said receiving means, said delayed gate generators having their outputs connected to gate said distributor means to produce a first distributor output during coincidence between the reception of reflected energy and said first gate pulse and a second distributor output during coincidence between the reception of reflected energy and said second gate pulse, a pair of intergrating networks, a differential amplifier, each of said pair of integrating networks connecting one of said outputs of said distributor to said differential amplifier, said differential amplifier producing an output proportional to the difference between the inputs thereto and of a polarity indicative of which of said inputs exceeds the other, the polarity of an output from said differential amplifier indicating the presence of the target at a distance related to the delay of a predetermined one of said gate generators.
Claim 4
Dependent Claim
214 words
A radar system comprising means for radiating radio frequency pulses, means for receiving reflected radiated energy, a pair of delayed gate-pulse generators triggered by said radiated pulses and producing first and second gate pulses during time intervals between successive ones of said radiated pulses and during which said reflected radiated energy may be received, said time intervals not exceeding the time corresponding to the maximum range of said radar system, distributor means connected to the output of said receiving means, said delayed gate generators having their outputs connected to gate said distributor means to produce a first distributor output during coincidence between the reception of reflected energy and said first gate pulse and a second distributor output during coincidence between the reception of reflected energy and said second gate pulse, a pair of intergrating networks, a differential amplifier, each of said pair of integrating networks connecting one of said outputs of said distributor to said differential amplifier, said differential amplifier producing an output proportional to the difference between the inputs thereto and of a polarity indicative of which of said inputs exceeds the other, the polarity of an output from said differential amplifier indicating the presence of the target at a distance related to the delay of a predetermined one of said gate generators.
Claim 5
Dependent Claim
172 words
A radar system comprising pulse transmitting means, receiving means, distributor means, a pulse generating means yielding a first pulse for actuating said transmitter means and second and third pulses delayed in time from said first pulse and between successive ones of said transmitted pulses at time intervals during which reflected energy may be received, said time intervals not exceeding the time corresponding to the maximum range of said radar system said second and third pulses actuating said distributor means, a pair of intergrating means, said distributor means selectively applying the output from said receiving means to one of said pair of integrating means during coincidence between said output and said second pulse and to the other of said pair of integrating means during coincidence between said output and said third pulse, differential amplifier means connected to the outputs of said pair of integrating means, said amplifier means producing an output indicative, by presence and polarity thereof, of a target at distances related to the delay time of said second and third pulses.
Claim 6
Dependent Claim
172 words
A radar system comprising pulse transmitting means, receiving means, distributor means, a pulse generating means yielding a first pulse for actuating said transmitter means and second and third pulses delayed in time from said first pulse and between successive ones of said transmitted pulses at time intervals during which reflected energy may be received, said time intervals not exceeding the time corresponding to the maximum range of said radar system said second and third pulses actuating said distributor means, a pair of intergrating means, said distributor means selectively applying the output from said receiving means to one of said pair of integrating means during coincidence between said output and said second pulse and to the other of said pair of integrating means during coincidence between said output and said third pulse, differential amplifier means connected to the outputs of said pair of integrating means, said amplifier means producing an output indicative, by presence and polarity thereof, of a target at distances related to the delay time of said second and third pulses.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-08-26 | 1984-02-25 | 1984-08-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-08-26 | 1988-02-25 | 1988-08-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-08-26 | 1992-02-25 | 1992-08-26 | $7700.00 | Window Closed / Lapsed |