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GB1431474A - Radar systens - Google Patents

Radar systens

Info

Publication number
GB1431474A
GB1431474A GB4374273A GB4374273A GB1431474A GB 1431474 A GB1431474 A GB 1431474A GB 4374273 A GB4374273 A GB 4374273A GB 4374273 A GB4374273 A GB 4374273A GB 1431474 A GB1431474 A GB 1431474A
Authority
GB
United Kingdom
Prior art keywords
diodes
effect device
cavity
plate
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
GB4374273A
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.)
SCOTT ELECTRONIC ENG Ltd JAMES
Original Assignee
SCOTT ELECTRONIC ENG Ltd JAMES
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
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
Application filed by SCOTT ELECTRONIC ENG Ltd JAMES filed Critical SCOTT ELECTRONIC ENG Ltd JAMES
Priority to GB4374273A priority patent/GB1431474A/en
Publication of GB1431474A publication Critical patent/GB1431474A/en
Priority to MY7700074A priority patent/MY7700074A/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

1431474 Radar JAMES SCOTT (ELECTRONIC ENG) Ltd 30 July 1974 [18 Sept 1973] 43742/73 Addition to 1289496 Heading H4D In a C.W. Doppler radar including a microwave generator comprising a Gunn effect device mounted in a resonant cavity, two mixer diodes are supplied with received signals which are in phase, and are also supplied with local oscillator signals from the generator which are in quadrature, said phase relationships being obtained by suitably positioning the diodes and the Gunn effect device relative to each other. An indication of the direction of a target is derived from the output signals of the diodes. In a first embodiment a resonant cavity 2, Fig. 1, comprises a portion of rectangular cross-section waveguide which has a short-circuiting plate 6 at one end, and which extends into a horn aerial 1 at the other end. A Gunn effect device 3 is mounted in the cavity 2 at a distance of n#/2 from the plate 6 (n = an integer, # = the operating wavelength). Spaced on either side of the device 3 are Schottky diodes 8, 9, their respective distances R1, R2 from said device being such that R1-R2=#/4 and R1+R2=m# (m= an integer). If m=1, R1=5#/8 and R2= 3#/8. The signals derived from the diodes may be processed by apparatus of the kind described in Specification 1,254,443. In another embodiment the Gunn effect device 3, Fig. 3, is housed in a lateral cavity 14, having a short-circuiting plate 15 at one end, and connected at the other end to the main cavity 2 by an H- or E-plane junction. The plate 6 may be replaced by a matched load. Reference has been directed by the Comptroller to Specification 1,214,833.
GB4374273A 1968-09-12 1973-09-18 Radar systens Expired GB1431474A (en)

Priority Applications (6)

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
MY7700074A MY7700074A (en) 1973-09-18 1977-12-31 Radar systems

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
GB1431474A true GB1431474A (en) 1976-04-07

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 Before (2)

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

Country Status (3)

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

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2921850A1 (en) * 1978-05-31 1979-12-06 Tdk Electronics Co Ltd DOPPLER DETECTOR

Families Citing this family (6)

* 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
US3895384A (en) * 1973-04-23 1975-07-15 Dickey John Corp Distance measuring apparatus
GB2123237A (en) * 1982-06-28 1984-01-25 Davy Mckee Surface detector
GB2321112A (en) * 1997-01-14 1998-07-15 Ford New Holland Nv Impeller for mass flow measurement

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2921850A1 (en) * 1978-05-31 1979-12-06 Tdk Electronics Co Ltd DOPPLER DETECTOR

Also Published As

Publication number Publication date
GB1254443A (en) 1971-11-24
DE1945545A1 (en) 1970-03-26
FR2017882A1 (en) 1970-05-22
GB1289496A (en) 1972-09-20

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee