GB720345A - Improvements in or relating to radar arrangements - Google Patents

Improvements in or relating to radar arrangements

Info

Publication number
GB720345A
GB720345A GB2239652A GB2239652A GB720345A GB 720345 A GB720345 A GB 720345A GB 2239652 A GB2239652 A GB 2239652A GB 2239652 A GB2239652 A GB 2239652A GB 720345 A GB720345 A GB 720345A
Authority
GB
United Kingdom
Prior art keywords
aerial
sensitivity
receiving
signals
radar
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB2239652A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to GB2239652A priority Critical patent/GB720345A/en
Publication of GB720345A publication Critical patent/GB720345A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
    • G01S7/02—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00
    • G01S7/28—Details of pulse systems
    • G01S7/2813—Means providing a modification of the radiation pattern for cancelling noise, clutter or interfering signals, e.g. side lobe suppression, side lobe blanking, null-steering arrays

Abstract

720,345. Radar. LEVELL, D. A. Aug. 18, 1953 [Sept. 5,1952], No. 22396/52. Class 40 (7). To prevent the side lobes of the pattern of a directional radar receiving aerial causing spurious indications, two receiving systems are used, each capable of handling signals over a wide range of amplitude. The sensitivity of the first receiving system is made directional and exceeds, in its region of maximum sensitivity, the sensitivity of the second system while for other directions the sensitivity of the second system is the greater. The output from the second system is subtracted from that of the first to yield an output only from objects in the region of maximum sensitivity of the first system. In one embodiment the radar system is provided with a rotating transmitting aerial 1 to which is mechanically coupled a directional receiving aerial 2 and a substantially omnidirectional receiving aerial 3. The aerial 3 is shown as rotating but need not do so, it should have substantially the same characteristic in the plane at right angles to the plane of rotation as the aerial 2. Signals received by aerial 2 are mixed with oscillations from a common local oscillator 4 to give signals amplified in I.F. amplifier 6 and video amplifier 7 before being applied to mixer 11. The signals from aerial 3 are mixed with oscillations from unit 4 at 8 and the signals produced amplified in I.F. amplifier 9 and video amplifier 10 before being applied in negative sense to mixer 11. The output from 11 is fed to a suitable display unit. Amplifiers 6 and 9 are preferably logarithmic amplifiers.
GB2239652A 1952-09-05 1952-09-05 Improvements in or relating to radar arrangements Expired GB720345A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2239652A GB720345A (en) 1952-09-05 1952-09-05 Improvements in or relating to radar arrangements

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2239652A GB720345A (en) 1952-09-05 1952-09-05 Improvements in or relating to radar arrangements

Publications (1)

Publication Number Publication Date
GB720345A true GB720345A (en) 1954-12-15

Family

ID=10178687

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2239652A Expired GB720345A (en) 1952-09-05 1952-09-05 Improvements in or relating to radar arrangements

Country Status (1)

Country Link
GB (1) GB720345A (en)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2994080A (en) * 1955-12-28 1961-07-25 Arthur A Varela Radar clutter suppression
US3164832A (en) * 1962-12-26 1965-01-05 Arthur A Varela If sidelobe cancellation
US3177489A (en) * 1960-01-11 1965-04-06 Thompson Ramo Wooldridge Inc Interference suppression systems
US3202990A (en) * 1959-05-04 1965-08-24 Gen Electric Intermediate frequency side-lobe canceller
US3947848A (en) * 1962-08-07 1976-03-30 The United States Of America As Represented By The Secretary Of The Navy Anti-jam dual channel video cancellation circuit for first target tracking system
US3996520A (en) * 1962-03-30 1976-12-07 Sperry Rand Corporation Interference rejecting logarithmic receiver
DE2714908A1 (en) * 1976-04-06 1977-10-20 Hollandse Signaalapparaten Bv COAERENT SIDE CLUB SUPPRESSION UNIT IN A PULSE RADAR
US4586048A (en) * 1971-03-04 1986-04-29 The United States Of America As Represented By The Secretary Of The Air Force Sidelobe canceller

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2994080A (en) * 1955-12-28 1961-07-25 Arthur A Varela Radar clutter suppression
US3202990A (en) * 1959-05-04 1965-08-24 Gen Electric Intermediate frequency side-lobe canceller
US3177489A (en) * 1960-01-11 1965-04-06 Thompson Ramo Wooldridge Inc Interference suppression systems
US3996520A (en) * 1962-03-30 1976-12-07 Sperry Rand Corporation Interference rejecting logarithmic receiver
US3947848A (en) * 1962-08-07 1976-03-30 The United States Of America As Represented By The Secretary Of The Navy Anti-jam dual channel video cancellation circuit for first target tracking system
US3164832A (en) * 1962-12-26 1965-01-05 Arthur A Varela If sidelobe cancellation
US4586048A (en) * 1971-03-04 1986-04-29 The United States Of America As Represented By The Secretary Of The Air Force Sidelobe canceller
DE2714908A1 (en) * 1976-04-06 1977-10-20 Hollandse Signaalapparaten Bv COAERENT SIDE CLUB SUPPRESSION UNIT IN A PULSE RADAR
US4119963A (en) * 1976-04-06 1978-10-10 Hollandse Signaalapparaten B.V. Coherent side-lobe suppressing unit for a pulse radar apparatus

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