JPS5455198A - Radar apparatus - Google Patents

Radar apparatus

Info

Publication number
JPS5455198A
JPS5455198A JP12137877A JP12137877A JPS5455198A JP S5455198 A JPS5455198 A JP S5455198A JP 12137877 A JP12137877 A JP 12137877A JP 12137877 A JP12137877 A JP 12137877A JP S5455198 A JPS5455198 A JP S5455198A
Authority
JP
Japan
Prior art keywords
signal
signals
information
comparator
changes over
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
JP12137877A
Other languages
Japanese (ja)
Other versions
JPS5816477B2 (en
Inventor
Akira Suzuki
Toyohiko Ozawa
Naoji Ishikawa
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.)
Toshiba Corp
Technical Research and Development Institute of Japan Defence Agency
Original Assignee
Toshiba Corp
Technical Research and Development Institute of Japan Defence Agency
Tokyo Shibaura 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 Toshiba Corp, Technical Research and Development Institute of Japan Defence Agency, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP12137877A priority Critical patent/JPS5816477B2/en
Publication of JPS5455198A publication Critical patent/JPS5455198A/en
Publication of JPS5816477B2 publication Critical patent/JPS5816477B2/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
    • G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
    • G01S13/02—Systems using reflection of radio waves, e.g. primary radar systems; Analogous systems
    • G01S13/06—Systems determining position data of a target
    • G01S13/08—Systems for measuring distance only
    • G01S13/10—Systems for measuring distance only using transmission of interrupted, pulse modulated waves
    • G01S13/22—Systems for measuring distance only using transmission of interrupted, pulse modulated waves using irregular pulse repetition frequency

Abstract

PURPOSE:To improve the detection probability of targets by providing a comparator to a radar apparatus which changes over and transmits pulse signals of different repetition frequencies and selecting the optimum repetition signal. CONSTITUTION:Transmission and reception are accomplished by way of a signal source 1 which generates the signal f1 of a longer repetition frequency for obtaining distance information and the signals f2, f3 of short but mutually different repetition frequencies for performing target angle tracking, a signal changeover device 3 which changes over and leads out the signals f2 and f3, a time gate circuit 2 which alternately transmits the signal f1 and signsls f2, f3, and thereafter through ordinary various circuits. Further, a distance tracking receiver 9 which transmits distrance information from the reflection signal from the target and a comparator 16 which receives said information, is introduced with the signals f2, f3 respectively and compares the respective time differences between the receiving time of the target reflection information and the latest signals f2, f3 before this receiving time detected in first, second gate converters 161, 162 respectively, with its comparator 163 and changes over the changeover device 3 toward the repetiction signal of a larger time difference are provided, whereby the optimum repetition signal is selected.
JP12137877A 1977-10-12 1977-10-12 radar device Expired JPS5816477B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12137877A JPS5816477B2 (en) 1977-10-12 1977-10-12 radar device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12137877A JPS5816477B2 (en) 1977-10-12 1977-10-12 radar device

Publications (2)

Publication Number Publication Date
JPS5455198A true JPS5455198A (en) 1979-05-02
JPS5816477B2 JPS5816477B2 (en) 1983-03-31

Family

ID=14809736

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12137877A Expired JPS5816477B2 (en) 1977-10-12 1977-10-12 radar device

Country Status (1)

Country Link
JP (1) JPS5816477B2 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2014025914A (en) * 2012-06-21 2014-02-06 Furuno Electric Co Ltd Target detection device and target detection method
GB2518193A (en) * 2013-09-13 2015-03-18 Bae Systems Plc Anomalous propagation detection
US10197666B2 (en) 2013-09-13 2019-02-05 Bae Systems Plc Anomalous propagation detection

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5980588A (en) * 1982-10-28 1984-05-10 Nippon Air Brake Co Ltd Proportional electromagnetic system direction controlling valve with manual operation mechanism
JPS6187276U (en) * 1984-11-13 1986-06-07

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2014025914A (en) * 2012-06-21 2014-02-06 Furuno Electric Co Ltd Target detection device and target detection method
GB2518193A (en) * 2013-09-13 2015-03-18 Bae Systems Plc Anomalous propagation detection
GB2518193B (en) * 2013-09-13 2017-06-07 Bae Systems Plc Anomalous propagation detection
US10197666B2 (en) 2013-09-13 2019-02-05 Bae Systems Plc Anomalous propagation detection

Also Published As

Publication number Publication date
JPS5816477B2 (en) 1983-03-31

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