SE341363B - - Google Patents

Info

Publication number
SE341363B
SE341363B SE04419/70A SE441970A SE341363B SE 341363 B SE341363 B SE 341363B SE 04419/70 A SE04419/70 A SE 04419/70A SE 441970 A SE441970 A SE 441970A SE 341363 B SE341363 B SE 341363B
Authority
SE
Sweden
Prior art keywords
mhz
transmitter
label
frequency
receiver
Prior art date
Application number
SE04419/70A
Other languages
English (en)
Inventor
P Cole
R Vaughan
Original Assignee
Unisearch 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 Unisearch Ltd filed Critical Unisearch Ltd
Publication of SE341363B publication Critical patent/SE341363B/xx

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
    • G01S13/74—Systems using reradiation of radio waves, e.g. secondary radar systems; Analogous systems
    • G01S13/75—Systems using reradiation of radio waves, e.g. secondary radar systems; Analogous systems using transponders powered from received waves, e.g. using passive transponders, or using passive reflectors
    • G01S13/751—Systems using reradiation of radio waves, e.g. secondary radar systems; Analogous systems using transponders powered from received waves, e.g. using passive transponders, or using passive reflectors wherein the responder or reflector radiates a coded signal
    • G01S13/755—Systems using reradiation of radio waves, e.g. secondary radar systems; Analogous systems using transponders powered from received waves, e.g. using passive transponders, or using passive reflectors wherein the responder or reflector radiates a coded signal using delay lines, e.g. acoustic delay lines
    • 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
    • G01S13/75—Systems using reradiation of radio waves, e.g. secondary radar systems; Analogous systems using transponders powered from received waves, e.g. using passive transponders, or using passive reflectors
    • G01S13/751—Systems using reradiation of radio waves, e.g. secondary radar systems; Analogous systems using transponders powered from received waves, e.g. using passive transponders, or using passive reflectors wherein the responder or reflector radiates a coded signal
    • G01S13/753—Systems using reradiation of radio waves, e.g. secondary radar systems; Analogous systems using transponders powered from received waves, e.g. using passive transponders, or using passive reflectors wherein the responder or reflector radiates a coded signal using frequency selective elements, e.g. resonator
    • 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

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)
  • Burglar Alarm Systems (AREA)
  • Geophysics And Detection Of Objects (AREA)
  • Radar Systems Or Details Thereof (AREA)
SE04419/70A 1969-04-02 1970-03-31 SE341363B (ja)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
AU5297069 1969-04-02

Publications (1)

Publication Number Publication Date
SE341363B true SE341363B (ja) 1971-12-20

Family

ID=3739082

Family Applications (1)

Application Number Title Priority Date Filing Date
SE04419/70A SE341363B (ja) 1969-04-02 1970-03-31

Country Status (12)

Country Link
JP (1) JPS5122797B1 (ja)
AR (1) AR211833A1 (ja)
BE (1) BE748053A (ja)
BR (1) BR7017853D0 (ja)
CH (1) CH522259A (ja)
DE (1) DE2015319C3 (ja)
FR (1) FR2038186A1 (ja)
GB (1) GB1290097A (ja)
IL (1) IL34201A0 (ja)
LU (1) LU60651A1 (ja)
NL (1) NL172893C (ja)
SE (1) SE341363B (ja)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4481428A (en) * 1981-05-19 1984-11-06 Security Tag Systems, Inc. Batteryless, portable, frequency divider useful as a transponder of electromagnetic radiation
US4413254A (en) * 1981-09-04 1983-11-01 Sensormatic Electronics Corporation Combined radio and magnetic energy responsive surveillance marker and system
US4642640A (en) * 1983-04-25 1987-02-10 Sensormatic Electronics Corporation Signal receptor-reradiator and surveillance tag using the same
US4736207A (en) * 1986-01-31 1988-04-05 Sensormatic Electronics Corporation Tag device and method for electronic article surveillance
US5095240A (en) * 1989-11-13 1992-03-10 X-Cyte, Inc. Inductively coupled saw device and method for making the same
US4951057A (en) * 1989-11-13 1990-08-21 X-Cyte, Inc. Inductive input/output coupling for a surface acoustic wave device
WO2019238201A1 (en) * 2018-06-11 2019-12-19 Hivetracker Sa A sytem for determining the location of mobile units in a warehouse and a warehouse provided with such system

Also Published As

Publication number Publication date
LU60651A1 (ja) 1971-06-14
DE2015319C3 (de) 1980-02-21
NL172893C (nl) 1983-11-01
AR211833A1 (es) 1978-03-31
BR7017853D0 (pt) 1973-04-17
NL7004749A (ja) 1970-10-06
GB1290097A (ja) 1972-09-20
FR2038186A1 (ja) 1971-01-08
CH522259A (fr) 1972-06-15
DE2015319B2 (de) 1979-06-28
JPS5122797B1 (ja) 1976-07-12
NL172893B (nl) 1983-06-01
IL34201A0 (en) 1970-05-21
BE748053A (fr) 1970-09-28
DE2015319A1 (de) 1970-10-15

Similar Documents

Publication Publication Date Title
US3707711A (en) Electronic surveillance system
KR920700406A (ko) Fet 오실레이터를 사용하는 단거리 레이더 송수신기
US2525328A (en) Radar system
US3685050A (en) Single antenna signal retransmission device
GB987868A (en) Frequency shift reflector system
US4142189A (en) Radar system
SE341363B (ja)
GB1348782A (en) Target detection by doppler shift
GB2147473A (en) Noise reduction in cw radar systems
GB1395872A (en) Compatible split band distance measuring method and apparatus
US3953851A (en) Device for a radio station comprising a jammer
US3076190A (en) Air-to-air ranging system
US2658195A (en) Moving target indicating radar system
GB1171751A (en) Secure Signalling Systems.
US2606282A (en) Pulse transponder
GB647126A (en) Combined radar and signal transmission systems
US5061933A (en) Short-range radar system
US3493969A (en) Radar device with frequency modulation and spectral compression of the intermediate-frequency signal
US2466532A (en) Superheterodyne radio altimeter or locator
GB723008A (en) Improvements in or relating to radar systems
GB1373736A (en) Short-range transceiver
GB740207A (en) Improvements in or relating to radioelectric distance measuring systems
JPH04178589A (ja) Ｆｍ―ｃｗレーダ装置
GB1124751A (en) Distance ranging equipment
GB1336255A (en) Micro-wave intruder detector systems