JPS58187882A - Radar beacon apparatus - Google Patents

Radar beacon apparatus

Info

Publication number
JPS58187882A
JPS58187882A JP7009182A JP7009182A JPS58187882A JP S58187882 A JPS58187882 A JP S58187882A JP 7009182 A JP7009182 A JP 7009182A JP 7009182 A JP7009182 A JP 7009182A JP S58187882 A JPS58187882 A JP S58187882A
Authority
JP
Japan
Prior art keywords
radar
pulse
transmission
detection circuit
generation circuit
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.)
Pending
Application number
JP7009182A
Other languages
Japanese (ja)
Inventor
Hiroshi Horikawa
Hidekazu Matsubara
Hiroaki Sumi
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.)
Fujitsu Ltd
Original Assignee
Fujitsu 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 Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP7009182A priority Critical patent/JPS58187882A/en
Publication of JPS58187882A publication Critical patent/JPS58187882A/en
Pending legal-status Critical Current

Links

Classifications

    • GPHYSICS
    • G01MEASURING; TESTING
    • G01SRADIO 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
    • G01S13/00Systems 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
    • G01S13/74Systems using reradiation of radio waves, e.g. secondary radar systems; Analogous systems
    • G01S13/76Systems using reradiation of radio waves, e.g. secondary radar systems; Analogous systems wherein pulse-type signals are transmitted
    • G01S13/767Responders; Transponders

Abstract

PURPOSE:To facilitate the recognition of a radar beacon signal indicated irrelevant to the distance range of a radar by controlling the transmission pulse width according to the repeated cycle of a radar pulse signal transmitted from a ship or the like. CONSTITUTION:A radar pulse signal received with a receiving section 3 is supplied to a repeated cycle detection circuit 5 through a trigger generator 4. A clock generation circuit 7 for receiving output of the detection circuit 5 forms a clock signal according to output of the detection circuit 5 and transmits it to a transmission pulse generation circuit 8. Then, the generation circuit 8 controls the width of the transmission pulse according to the clock signal and sends the pulse to a transmission section 9. Thus, the transmission pulse width is controlled according to the repeated cycle thereby facilitating the recognition of the radar beacon signal as indicated irrelevant to the distance range of the radar.
JP7009182A 1982-04-26 1982-04-26 Radar beacon apparatus Pending JPS58187882A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7009182A JPS58187882A (en) 1982-04-26 1982-04-26 Radar beacon apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7009182A JPS58187882A (en) 1982-04-26 1982-04-26 Radar beacon apparatus

Publications (1)

Publication Number Publication Date
JPS58187882A true JPS58187882A (en) 1983-11-02

Family

ID=13421518

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7009182A Pending JPS58187882A (en) 1982-04-26 1982-04-26 Radar beacon apparatus

Country Status (1)

Country Link
JP (1) JPS58187882A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2014180241A (en) * 2013-03-19 2014-09-29 Tasada Kosakusho:Kk Migratory bird observation system and transmitter for the same

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2014180241A (en) * 2013-03-19 2014-09-29 Tasada Kosakusho:Kk Migratory bird observation system and transmitter for the same

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