GB1467000A - Electrical methods and apparatus for radar jamming - Google Patents

Electrical methods and apparatus for radar jamming

Info

Publication number
GB1467000A
GB1467000A GB490673A GB490673A GB1467000A GB 1467000 A GB1467000 A GB 1467000A GB 490673 A GB490673 A GB 490673A GB 490673 A GB490673 A GB 490673A GB 1467000 A GB1467000 A GB 1467000A
Authority
GB
United Kingdom
Prior art keywords
random
jan
transponder
delay line
range gate
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
GB490673A
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.)
BAE Systems Electronics Ltd
Original Assignee
Marconi 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 Marconi Co Ltd filed Critical Marconi Co Ltd
Priority to GB490673A priority Critical patent/GB1467000A/en
Publication of GB1467000A publication Critical patent/GB1467000A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04K—SECRET COMMUNICATION; JAMMING OF COMMUNICATION
    • H04K3/00—Jamming of communication; Counter-measures
    • H04K3/40—Jamming having variable characteristics
    • H04K3/43—Jamming having variable characteristics characterized by the control of the jamming power, signal-to-noise ratio or geographic coverage area
    • 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
    • G01S13/74—Systems using reradiation of radio waves, e.g. secondary radar systems; Analogous systems
    • G01S13/76—Systems using reradiation of radio waves, e.g. secondary radar systems; Analogous systems wherein pulse-type signals are transmitted
    • G01S13/767—Responders; Transponders
    • 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
    • G01S7/38—Jamming means, e.g. producing false echoes
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04K—SECRET COMMUNICATION; JAMMING OF COMMUNICATION
    • H04K3/00—Jamming of communication; Counter-measures
    • H04K3/60—Jamming involving special techniques
    • H04K3/68—Jamming involving special techniques using passive jamming, e.g. by shielding or reflection
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04K—SECRET COMMUNICATION; JAMMING OF COMMUNICATION
    • H04K3/00—Jamming of communication; Counter-measures
    • H04K3/80—Jamming or countermeasure characterized by its function
    • H04K3/82—Jamming or countermeasure characterized by its function related to preventing surveillance, interception or detection
    • H04K3/825—Jamming or countermeasure characterized by its function related to preventing surveillance, interception or detection by jamming
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04K—SECRET COMMUNICATION; JAMMING OF COMMUNICATION
    • H04K3/00—Jamming of communication; Counter-measures
    • H04K3/40—Jamming having variable characteristics
    • H04K3/45—Jamming having variable characteristics characterized by including monitoring of the target or target signal, e.g. in reactive jammers or follower jammers for example by means of an alternation of jamming phases and monitoring phases, called "look-through mode"

Landscapes

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

Abstract

1467000 A range gate stealing transponder MARCONI CO Ltd 25 Jan 1974 [31 Jan 1973] 4906/73 Heading H4L A range gate stealing transponder incorporates a switch 14 which is closed in response to a received radar pulse to couple a time fraction of that pulse into a recirculating delay line 20 of a delay at least as long as the time fraction, means for transmitting the signals passing along the delay line over a period not less than the duration of a plurality of the time fractions, and a modulator 24 which imposes a random phase modulation on the recirculating signal (e.g. by random noise or random discrete phase shifts).
GB490673A 1974-01-25 1974-01-25 Electrical methods and apparatus for radar jamming Expired GB1467000A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB490673A GB1467000A (en) 1974-01-25 1974-01-25 Electrical methods and apparatus for radar jamming

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB490673A GB1467000A (en) 1974-01-25 1974-01-25 Electrical methods and apparatus for radar jamming

Publications (1)

Publication Number Publication Date
GB1467000A true GB1467000A (en) 1977-03-16

Family

ID=9786108

Family Applications (1)

Application Number Title Priority Date Filing Date
GB490673A Expired GB1467000A (en) 1974-01-25 1974-01-25 Electrical methods and apparatus for radar jamming

Country Status (1)

Country Link
GB (1) GB1467000A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2529039A1 (en) * 1982-06-18 1983-12-23 Thomson Csf FIXED AND / OR MOBILE PULSE GENERATOR ARBITRAIREMENTALLY LARGE AND CONTROLLED BY INCREMENTS
EP0282195A2 (en) * 1987-03-06 1988-09-14 Raytheon Company Radar performance monitor
US5032839A (en) * 1990-04-09 1991-07-16 American Electronic Laboratories, Inc. Self-equalizing coherent optical RF memory
CN114720948A (en) * 2022-05-18 2022-07-08 北京宏锐星通科技有限公司 Transmitting-receiving isolation forwarding interference method and forwarding interference device based on analog delay line

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2529039A1 (en) * 1982-06-18 1983-12-23 Thomson Csf FIXED AND / OR MOBILE PULSE GENERATOR ARBITRAIREMENTALLY LARGE AND CONTROLLED BY INCREMENTS
EP0097565A1 (en) * 1982-06-18 1984-01-04 Thomson-Csf Generator of fixed and/or mobile pulses with an incrementally variable arbitrary long delay
EP0282195A2 (en) * 1987-03-06 1988-09-14 Raytheon Company Radar performance monitor
EP0282195A3 (en) * 1987-03-06 1990-05-30 Raytheon Company Radar performance monitor
US5032839A (en) * 1990-04-09 1991-07-16 American Electronic Laboratories, Inc. Self-equalizing coherent optical RF memory
CN114720948A (en) * 2022-05-18 2022-07-08 北京宏锐星通科技有限公司 Transmitting-receiving isolation forwarding interference method and forwarding interference device based on analog delay line

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Legal Events

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