US3662385A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rapid scanning echo detector
Assignee: Safran Aircraft Engines SAS
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Filing: 1970-02-16
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Granted: 1972-05-09
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Expires: 1990-02-16
Abstract
Abstract A radar system or other echo detection system is disclosed in which a transmitting antenna array and a receiving antenna array are utilized, the transmitting array having a plurality p or antenna elements, or radiators, and the receiving array having a plurality n of antenna elements which may be different in number from the number of antenna elements in the transmitting array, and each array having respective signal channels. The transmitting and receiving arrays are rapidly and simultaneously scanned by an electronic scanning technique in which the reception range is scanned within the duration of the transmission pulse. According to the present disclosure, this is accomplished by the steps of feeding respective frequencies differing by a constant increment fr to successive elemental antenna channels of the receiving array and feeding respective frequencies differing by another constant increment fe to successive elemental antenna channels of the transmitting array, wherein the increment fr between frequencies fed to the receiving antenna elements is greater than or equal to the product of the increment fe between frequencies fed to the transmitting antenna elements and the number p of antenna elements in the transmitting array, i.e., fr > OR = p. fe .
Inventors
- 👤 Michel Jacques Robert Nicolas
- 👤 Claude Marius Pirolli
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:37
CPC Classifications
G; G01; G01S; G01S13/00; G01S13/02; G01S13/06; G01S13/42; G01S13/426; G01S13/428; H; H01; H01Q; H01Q3/00; H01Q3/26; H01Q3/30; H01Q3/34; H01Q3/42
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
119 words
A rapid electronic scanning process for a radar system having a transmitting antenna array and a receiving antenna array, each array consisting of a plurality of antenna elements, said process comprising the steps of: applying signals of respective frequencies differing by a constant increment fr to successive feed channels, respectively, of said receiving array, and simultaneously with the application of the first-named signals to said channels of said receiving array, applying further signals of respective frequencies differing by another constant increment fe to successive feed channels, respectively, of said transmitting array, wherein the increment fr is selected to be at least equal to the product of the increment fe and the number of antenna elements in said transmitting array.
Claim 2
Dependent Claim
119 words
A rapid electronic scanning process for a radar system having a transmitting antenna array and a receiving antenna array, each array consisting of a plurality of antenna elements, said process comprising the steps of: applying signals of respective frequencies differing by a constant increment fr to successive feed channels, respectively, of said receiving array, and simultaneously with the application of the first-named signals to said channels of said receiving array, applying further signals of respective frequencies differing by another constant increment fe to successive feed channels, respectively, of said transmitting array, wherein the increment fr is selected to be at least equal to the product of the increment fe and the number of antenna elements in said transmitting array.
Claim 3
Dependent Claim
21 words
The process according to claim 1 wherein each of said frequencies is increased by the respective increment for said successive channels.
Claim 4
Dependent Claim
18 words
The process according to claim 1 wherein said increment fr is selected to be greater than said product.
Claim 5
Dependent Claim
15 words
The process according to claim 1 wherein both of said frequency-inserting means are operated simultaneously.
Claim 6
Dependent Claim
23 words
The process according to claim 1 wherein said frequencies are successively increased by the respective increment for insertion into the successive channels, respectively.
Claim 7
Dependent Claim
126 words
A rapid scanning radar system, comprising a transmitting antenna array consisting of p antenna elements, a receiving antenna array consisting of n antenna elements, a set of feed channels respectively associated with said antenna elements of said transmitting array, a set of signal processing channels respectively associated with said antenna elements of said receiving array, means for inserting respective frequencies differing by a predetermined frequency increment fe into respective channels associated with successive ones of said antenna elements of said transmitting array, and means for inserting respective frequencies differing by a predetermined frequency increment fr different from said increment fe into respective channels associated with successive ones of said antenna elements of said receiving array, said increment fr having a value fr > or = p.fe.
Claim 8
Dependent Claim
126 words
A rapid scanning radar system, comprising a transmitting antenna array consisting of p antenna elements, a receiving antenna array consisting of n antenna elements, a set of feed channels respectively associated with said antenna elements of said transmitting array, a set of signal processing channels respectively associated with said antenna elements of said receiving array, means for inserting respective frequencies differing by a predetermined frequency increment fe into respective channels associated with successive ones of said antenna elements of said transmitting array, and means for inserting respective frequencies differing by a predetermined frequency increment fr different from said increment fe into respective channels associated with successive ones of said antenna elements of said receiving array, said increment fr having a value fr > or = p.fe.
Claim 9
Dependent Claim
29 words
The radar system according to claim 6 wherein the number of antenna elements in said receiving array is different from the number of antenna elements in said transmitting array.
Claim 10
Dependent Claim
9 words
The system according to claim 6 wherein n p.
Claim 11
Dependent Claim
42 words
The system according to claim 6 further including means responsive to pulses reflected from an object illuminated by tHe scanning transmitting array, as received by said receiving array, for displaying the angle and distance of said object with reference to said arrays.
Claim 12
Dependent Claim
69 words
The system according to claim 9 wherein said display means includes cathode ray tube means, means for producing sawtooth waves of respective frequencies nfe and (n - 1) fe, synchronized with the scanning of said receiving array, and means for applying said frequencies nfe and (n - 1) fe to the horizontal and vertical plates, respectively, of said cathode ray tube means, n being the number of antenna array.
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) | 1975-05-09 | 1975-11-08 | 1976-05-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-09 | 1979-11-08 | 1980-05-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-09 | 1983-11-08 | 1984-05-09 | $7700.00 | Window Closed / Lapsed |