GB1254443A - Radar systems - Google Patents

Radar systems

Info

Publication number
GB1254443A
GB1254443A GB4344468A GB4344468A GB1254443A GB 1254443 A GB1254443 A GB 1254443A GB 4344468 A GB4344468 A GB 4344468A GB 4344468 A GB4344468 A GB 4344468A GB 1254443 A GB1254443 A GB 1254443A
Authority
GB
United Kingdom
Prior art keywords
doppler
signal
amplifier
square wave
gunn effect
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
GB4344468A
Inventor
Alexander Ian Mcphedran
Ian Ramsay Paterson
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.)
JAMES SCOTT ELECTRONIC ENGINEE
Original Assignee
JAMES SCOTT ELECTRONIC ENGINEE
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 JAMES SCOTT ELECTRONIC ENGINEE filed Critical JAMES SCOTT ELECTRONIC ENGINEE
Priority to GB4344468A priority Critical patent/GB1254443A/en
Priority to DE19691945545 priority patent/DE1945545A1/en
Priority to FR6930537A priority patent/FR2017882A1/fr
Priority to GB1289496D priority patent/GB1289496A/en
Publication of GB1254443A publication Critical patent/GB1254443A/en
Priority to GB4374273A priority patent/GB1431474A/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
    • G01S13/50—Systems of measurement based on relative movement of target
    • G01S13/58—Velocity or trajectory determination systems; Sense-of-movement determination systems
    • G01S13/62—Sense-of-movement determination
    • 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
    • G01S7/03—Details of HF subsystems specially adapted therefor, e.g. common to transmitter and receiver
    • G01S7/032—Constructional details for solid-state radar subsystems

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)
  • Burglar Alarm Systems (AREA)

Abstract

1,254,443. Doppler radar; Gunn effect circuits. JAMES SCOTT (ELECTRONIC ENG.) Ltd. 28 Aug., 1969 [12 Sept., 1968], No. 43444/68. Headings H3T and H4D. [Also in Division G4] A C.W. Doppler radar system includes a microwave generator comprising a Gunn effect device mounted in a resonant cavity. The Gunn effect device 3 powered from a D.C. supply 6 generates a CW signal providing both radiated power and the local oscillator signal for the mixer diode 2, which may be the device 3 itself. The Doppler beat frequency is passed through an amplifier 7 to a further two amplifiers 9, 16. Amplifier 16 powers an internal loud-speaker 17 or an external loud-speaker through socket 18, to give an audible indication of the Doppler signal. The amplifier 9 is switchable in gain and band width, the switch also controlling the f.s.d. of the indicating meter 15. The Doppler signal is " squared up " in a Schmitt trigger 11, whose noise threshold is set by variable resistor 10 and this square wave drives a bi-stable 13 which gives a noise-free square wave at one half the Doppler frequency. This square wave drives a monostable 14, the short pulses from which are fed to a meter 15 which gives an indication of the speed of the object under surveillance, depending on the pulse repetition rate. Sockets are also provided at 8, 12 for outputs to oscilloscope and revolution counter respectively. There may be two separate aerials for transmission and reception when the local oscillator signal may be provided by leakage between the two. The system may be used for a burglar alarm detecting movement within a surveillance area in which case a Doppler signal opens a normally-closed relay, or for a tachogenerator, or in traffic study. Reference has been directed by the Comptroller to Specification 1,214,833.
GB4344468A 1968-09-12 1968-09-12 Radar systems Expired GB1254443A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
GB4344468A GB1254443A (en) 1968-09-12 1968-09-12 Radar systems
DE19691945545 DE1945545A1 (en) 1968-09-12 1969-09-09 Radar system
FR6930537A FR2017882A1 (en) 1968-09-12 1969-09-09
GB1289496D GB1289496A (en) 1968-09-12 1969-11-25
GB4374273A GB1431474A (en) 1968-09-12 1973-09-18 Radar systens

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
GB4344468A GB1254443A (en) 1968-09-12 1968-09-12 Radar systems
GB5758469 1969-11-25
GB4374273A GB1431474A (en) 1968-09-12 1973-09-18 Radar systens

Publications (1)

Publication Number Publication Date
GB1254443A true GB1254443A (en) 1971-11-24

Family

ID=27259792

Family Applications (3)

Application Number Title Priority Date Filing Date
GB4344468A Expired GB1254443A (en) 1968-09-12 1968-09-12 Radar systems
GB1289496D Expired GB1289496A (en) 1968-09-12 1969-11-25
GB4374273A Expired GB1431474A (en) 1968-09-12 1973-09-18 Radar systens

Family Applications After (2)

Application Number Title Priority Date Filing Date
GB1289496D Expired GB1289496A (en) 1968-09-12 1969-11-25
GB4374273A Expired GB1431474A (en) 1968-09-12 1973-09-18 Radar systens

Country Status (3)

Country Link
DE (1) DE1945545A1 (en)
FR (1) FR2017882A1 (en)
GB (3) GB1254443A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2417407A1 (en) * 1973-04-23 1974-11-14 Dickey John Corp DISTANCE AND SPEED MEASURING DEVICE
GB2321112A (en) * 1997-01-14 1998-07-15 Ford New Holland Nv Impeller for mass flow measurement

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3659293A (en) * 1970-06-02 1972-04-25 Bendix Corp Range-detecting doppler radar
US3701568A (en) * 1970-09-30 1972-10-31 Bendix Corp Adaptive braking system utilizing doppler radar
JPS49100994A (en) * 1973-01-31 1974-09-24
JPS54156496A (en) * 1978-05-31 1979-12-10 Tdk Corp Detector for doppler unit
GB2123237A (en) * 1982-06-28 1984-01-25 Davy Mckee Surface detector

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2417407A1 (en) * 1973-04-23 1974-11-14 Dickey John Corp DISTANCE AND SPEED MEASURING DEVICE
GB2321112A (en) * 1997-01-14 1998-07-15 Ford New Holland Nv Impeller for mass flow measurement

Also Published As

Publication number Publication date
GB1289496A (en) 1972-09-20
FR2017882A1 (en) 1970-05-22
GB1431474A (en) 1976-04-07
DE1945545A1 (en) 1970-03-26

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