GB9018067D0 - Intruder alarm system - Google Patents

Intruder alarm system

Info

Publication number
GB9018067D0
GB9018067D0 GB909018067A GB9018067A GB9018067D0 GB 9018067 D0 GB9018067 D0 GB 9018067D0 GB 909018067 A GB909018067 A GB 909018067A GB 9018067 A GB9018067 A GB 9018067A GB 9018067 D0 GB9018067 D0 GB 9018067D0
Authority
GB
United Kingdom
Prior art keywords
alarm system
intruder alarm
intruder
alarm
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.)
Withdrawn
Application number
GB909018067A
Other versions
GB2237470A (en
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
Priority claimed from GB898919962A external-priority patent/GB8919962D0/en
Application filed by Marconi Co Ltd filed Critical Marconi Co Ltd
Priority to GB9018067A priority Critical patent/GB2237470A/en
Publication of GB9018067D0 publication Critical patent/GB9018067D0/en
Publication of GB2237470A publication Critical patent/GB2237470A/en
Withdrawn legal-status Critical Current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
    • G01S13/32—Systems for measuring distance only using transmission of continuous waves, whether amplitude-, frequency-, or phase-modulated, or unmodulated
    • G01S13/34—Systems for measuring distance only using transmission of continuous waves, whether amplitude-, frequency-, or phase-modulated, or unmodulated using transmission of continuous, frequency-modulated waves while heterodyning the received signal, or a signal derived therefrom, with a locally-generated signal related to the contemporaneously transmitted signal
    • 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
    • G01S13/04—Systems determining presence of a target

Landscapes

  • Engineering & Computer Science (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Burglar Alarm Systems (AREA)
GB9018067A 1989-09-04 1990-08-17 Intruder alarm system Withdrawn GB2237470A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB9018067A GB2237470A (en) 1989-09-04 1990-08-17 Intruder alarm system

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB898919962A GB8919962D0 (en) 1989-09-04 1989-09-04 Threshold circuit arrangement
GB9018067A GB2237470A (en) 1989-09-04 1990-08-17 Intruder alarm system

Publications (2)

Publication Number Publication Date
GB9018067D0 true GB9018067D0 (en) 1990-10-03
GB2237470A GB2237470A (en) 1991-05-01

Family

ID=26295867

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9018067A Withdrawn GB2237470A (en) 1989-09-04 1990-08-17 Intruder alarm system

Country Status (1)

Country Link
GB (1) GB2237470A (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002257928A (en) 2001-03-06 2002-09-11 Murata Mfg Co Ltd Radar
JP2003315450A (en) * 2002-04-24 2003-11-06 Hitachi Ltd Monitoring system for millimeter wave radar

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2184481B1 (en) * 1972-05-18 1978-09-01 France Etat
FR2297517A1 (en) * 1975-01-10 1976-08-06 Thomson Csf BAND COMPRESSION DEVICE AND ACTIVE DETECTION SYSTEM INCLUDING SUCH A DEVICE

Also Published As

Publication number Publication date
GB2237470A (en) 1991-05-01

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Legal Events

Date Code Title Description
WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)