JPS5540904A - Side lobe suppression system - Google Patents

Side lobe suppression system

Info

Publication number
JPS5540904A
JPS5540904A JP10352378A JP10352378A JPS5540904A JP S5540904 A JPS5540904 A JP S5540904A JP 10352378 A JP10352378 A JP 10352378A JP 10352378 A JP10352378 A JP 10352378A JP S5540904 A JPS5540904 A JP S5540904A
Authority
JP
Japan
Prior art keywords
side lobe
antenna
suppression
reflection
suppressed
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.)
Granted
Application number
JP10352378A
Other languages
Japanese (ja)
Other versions
JPS633266B2 (en
Inventor
Sumio Maenozono
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.)
NEC Corp
Original Assignee
NEC Corp
Nippon Electric Co Ltd
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 NEC Corp, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP10352378A priority Critical patent/JPS5540904A/en
Publication of JPS5540904A publication Critical patent/JPS5540904A/en
Publication of JPS633266B2 publication Critical patent/JPS633266B2/ja
Granted 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Radar Systems Or Details Thereof (AREA)

Abstract

PURPOSE:To enable to realize the stability of the suppression of artificial target due to side lobe suppression and reflection, by emitting the questionnaire pulse and control pulse from the same antenna, through the use of antenna which can radiate three types of beams. CONSTITUTION:Three patters from the sum and difference omega antenna 4 reach the target 3 with the same path. Further, at the region surrounded with the difference omega antenna 4 reach the target 3 with the same path. Further, at the region surrounded with the difference plus omega pattern, the pair pulses of P1 and P2 reach the transponder earlier, and since P1/P2<=0dB, the suppression gate of about 35muS is caused with the characteristics of the transponder and it does not respond to the signal reached with reflection. Thus, the artificial target by reflection is suppressed. In the Figure, response is made when P1/P2>=9dB, suppressed when P1/P2<=0dB, and responded or suppressed when 0<P1<P2<9dB. Further, the phase relation of the questionnaire and control pulses P1 and P2 radiation beams is constant, the side lobe suppression is stable, and the inconvenience of side lobe suppression due to geographical condition can remarkably be improved.
JP10352378A 1978-08-24 1978-08-24 Side lobe suppression system Granted JPS5540904A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10352378A JPS5540904A (en) 1978-08-24 1978-08-24 Side lobe suppression system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10352378A JPS5540904A (en) 1978-08-24 1978-08-24 Side lobe suppression system

Publications (2)

Publication Number Publication Date
JPS5540904A true JPS5540904A (en) 1980-03-22
JPS633266B2 JPS633266B2 (en) 1988-01-22

Family

ID=14356277

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10352378A Granted JPS5540904A (en) 1978-08-24 1978-08-24 Side lobe suppression system

Country Status (1)

Country Link
JP (1) JPS5540904A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5875080A (en) * 1981-10-30 1983-05-06 Nec Corp Side lobe suppressing system
JPS5875079A (en) * 1981-10-30 1983-05-06 Nec Corp Side lobe suppressing system

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5148989A (en) * 1974-10-25 1976-04-27 Tokyo Shibaura Electric Co NIJIKANSHI REEDA

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5148989A (en) * 1974-10-25 1976-04-27 Tokyo Shibaura Electric Co NIJIKANSHI REEDA

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5875080A (en) * 1981-10-30 1983-05-06 Nec Corp Side lobe suppressing system
JPS5875079A (en) * 1981-10-30 1983-05-06 Nec Corp Side lobe suppressing system

Also Published As

Publication number Publication date
JPS633266B2 (en) 1988-01-22

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