IT962111B - Apparecchio di rivelazione di intrusione ovvero antifurto - Google Patents

Apparecchio di rivelazione di intrusione ovvero antifurto

Info

Publication number
IT962111B
IT962111B IT52187/72A IT5218772A IT962111B IT 962111 B IT962111 B IT 962111B IT 52187/72 A IT52187/72 A IT 52187/72A IT 5218772 A IT5218772 A IT 5218772A IT 962111 B IT962111 B IT 962111B
Authority
IT
Italy
Prior art keywords
theft
intrusion
detection
equipment
Prior art date
Application number
IT52187/72A
Other languages
English (en)
Original Assignee
Johnson Service Co
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 Johnson Service Co filed Critical Johnson Service Co
Application granted granted Critical
Publication of IT962111B publication Critical patent/IT962111B/it

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03B—GENERATION OF OSCILLATIONS, DIRECTLY OR BY FREQUENCY-CHANGING, BY CIRCUITS EMPLOYING ACTIVE ELEMENTS WHICH OPERATE IN A NON-SWITCHING MANNER; GENERATION OF NOISE BY SUCH CIRCUITS
    • H03B9/00—Generation of oscillations using transit-time effects
    • H03B9/12—Generation of oscillations using transit-time effects using solid state devices, e.g. Gunn-effect devices
    • H03B9/14—Generation of oscillations using transit-time effects using solid state devices, e.g. Gunn-effect devices and elements comprising distributed inductance and capacitance
    • H03B9/145—Generation of oscillations using transit-time effects using solid state devices, e.g. Gunn-effect devices and elements comprising distributed inductance and capacitance the frequency being determined by a cavity resonator, e.g. a hollow waveguide cavity or a coaxial cavity
    • 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
    • G01S13/52—Discriminating between fixed and moving objects or between objects moving at different speeds
    • G01S13/56—Discriminating between fixed and moving objects or between objects moving at different speeds for presence detection
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B13/00—Burglar, theft or intruder alarms
    • G08B13/22—Electrical actuation
    • G08B13/24—Electrical actuation by interference with electromagnetic field distribution
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03B—GENERATION OF OSCILLATIONS, DIRECTLY OR BY FREQUENCY-CHANGING, BY CIRCUITS EMPLOYING ACTIVE ELEMENTS WHICH OPERATE IN A NON-SWITCHING MANNER; GENERATION OF NOISE BY SUCH CIRCUITS
    • H03B9/00—Generation of oscillations using transit-time effects
    • H03B9/12—Generation of oscillations using transit-time effects using solid state devices, e.g. Gunn-effect devices
    • H03B2009/126—Generation of oscillations using transit-time effects using solid state devices, e.g. Gunn-effect devices using impact ionization avalanche transit time [IMPATT] diodes
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03B—GENERATION OF OSCILLATIONS, DIRECTLY OR BY FREQUENCY-CHANGING, BY CIRCUITS EMPLOYING ACTIVE ELEMENTS WHICH OPERATE IN A NON-SWITCHING MANNER; GENERATION OF NOISE BY SUCH CIRCUITS
    • H03B7/00—Generation of oscillations using active element having a negative resistance between two of its electrodes
    • H03B7/02—Generation of oscillations using active element having a negative resistance between two of its electrodes with frequency-determining element comprising lumped inductance and capacitance
    • H03B7/06—Generation of oscillations using active element having a negative resistance between two of its electrodes with frequency-determining element comprising lumped inductance and capacitance active element being semiconductor device
    • H03B7/08—Generation of oscillations using active element having a negative resistance between two of its electrodes with frequency-determining element comprising lumped inductance and capacitance active element being semiconductor device being a tunnel diode

Landscapes

  • Engineering & Computer Science (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Electromagnetism (AREA)
  • Radar Systems Or Details Thereof (AREA)
  • Burglar Alarm Systems (AREA)
IT52187/72A 1971-08-16 1972-08-14 Apparecchio di rivelazione di intrusione ovvero antifurto IT962111B (it)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US17205271A 1971-08-16 1971-08-16

Publications (1)

Publication Number Publication Date
IT962111B true IT962111B (it) 1973-12-20

Family

ID=22626164

Family Applications (1)

Application Number Title Priority Date Filing Date
IT52187/72A IT962111B (it) 1971-08-16 1972-08-14 Apparecchio di rivelazione di intrusione ovvero antifurto

Country Status (7)

Country Link
US (1) US3750165A (it)
AU (1) AU4522172A (it)
CA (1) CA984032A (it)
DE (1) DE2240255A1 (it)
FR (1) FR2149496A1 (it)
GB (1) GB1400069A (it)
IT (1) IT962111B (it)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2223705B1 (it) * 1973-04-02 1977-09-02 Lignes Telegraph Telephon
US4027303A (en) * 1975-05-22 1977-05-31 Neuwirth Karl R Apparatus for detecting the presence of objects by sensing reflected energy
FR2414186A1 (fr) * 1978-01-09 1979-08-03 Haut Rhin Manufacture Machines Fusee de proximite pour projectile explosif utilisant une micro-cavite radar
GB8319642D0 (en) * 1983-07-20 1983-08-24 Plessey Co Plc Remote switch
US5963850A (en) * 1996-12-06 1999-10-05 Pittway Corp. Method and apparatus for verifying the operability of a balanced diode mixer and local oscillator combination
JP5422834B2 (ja) * 2007-04-02 2014-02-19 独立行政法人情報通信研究機構 マイクロ波・ミリ波センサ装置
US7607948B1 (en) * 2008-10-16 2009-10-27 Elka International Ltd. Choke signal-adjusting device
CN110806510B (zh) * 2019-11-04 2022-01-11 中国科学院合肥物质科学研究院 一种测量4.6GHz低杂波平行磁场方向波数的系统

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1214833A (en) * 1967-03-31 1970-12-02 Nat Res Dev Radar apparatus and systems
US3659293A (en) * 1970-06-02 1972-04-25 Bendix Corp Range-detecting doppler radar

Also Published As

Publication number Publication date
FR2149496A1 (it) 1973-03-30
US3750165A (en) 1973-07-31
CA984032A (en) 1976-02-17
DE2240255A1 (de) 1973-02-22
GB1400069A (en) 1975-07-16
AU4522172A (en) 1974-02-07

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