SE9003698L - ELECTRONIC SEARCH SYSTEM - Google Patents

ELECTRONIC SEARCH SYSTEM

Info

Publication number
SE9003698L
SE9003698L SE9003698A SE9003698A SE9003698L SE 9003698 L SE9003698 L SE 9003698L SE 9003698 A SE9003698 A SE 9003698A SE 9003698 A SE9003698 A SE 9003698A SE 9003698 L SE9003698 L SE 9003698L
Authority
SE
Sweden
Prior art keywords
transponder
reflector
transmitter
dielectricum
antenna
Prior art date
Application number
SE9003698A
Other languages
Unknown language ( )
Swedish (sv)
Other versions
SE467640B (en
SE9003698D0 (en
Inventor
Hans Loefberg
Jan Eriksson
Original Assignee
Hans Loefberg
Jan Eriksson
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 Hans Loefberg, Jan Eriksson filed Critical Hans Loefberg
Priority to SE9003698A priority Critical patent/SE467640B/en
Publication of SE9003698D0 publication Critical patent/SE9003698D0/en
Priority to AU90293/91A priority patent/AU9029391A/en
Priority to PCT/SE1991/000785 priority patent/WO1992009906A1/en
Publication of SE9003698L publication Critical patent/SE9003698L/en
Publication of SE467640B publication Critical patent/SE467640B/en

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
    • G01S13/753—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

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)

Abstract

A system for discovering objects of different kinds, for finding victims of avalanches, ship wreckage etc., for warning of risky actions etc., consisting of a transmitter and a transponder. A signal emitted from the transmitter is reflected by the transponder in the form of an overtone of the emitted signal. The transponder, which can be double-sided with a reflector inbetween, consists of an antenna with one or several semiconductors, a reflector and an intervening dielectricum dimensioned to give the reflected output signal maximum strength. The dielectricum can be an integral part of an article of clothing or an object. It can also be arranged to be introduced between antenna and reflector at for example inflation of a life-jacket, whereby life-jackets not in use may be inactive and not interfer with the search for floating persons. In order to ease the handling the transmitter can also be divided up so that only a smaller part with the antennas has to be kept in the hand while batteries and the remaining construction for example can be carried on the back. The weight of the movable part thus can be brought down to a fifth of the total weight (about 1 kg), which is a substantial relief during hours of searching.
SE9003698A 1990-11-21 1990-11-21 ELECTRONIC SEARCH SYSTEM SE467640B (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
SE9003698A SE467640B (en) 1990-11-21 1990-11-21 ELECTRONIC SEARCH SYSTEM
AU90293/91A AU9029391A (en) 1990-11-21 1991-11-20 Electronic detection system
PCT/SE1991/000785 WO1992009906A1 (en) 1990-11-21 1991-11-20 Electronic detection system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE9003698A SE467640B (en) 1990-11-21 1990-11-21 ELECTRONIC SEARCH SYSTEM

Publications (3)

Publication Number Publication Date
SE9003698D0 SE9003698D0 (en) 1990-11-21
SE9003698L true SE9003698L (en) 1992-05-22
SE467640B SE467640B (en) 1992-08-17

Family

ID=20380960

Family Applications (1)

Application Number Title Priority Date Filing Date
SE9003698A SE467640B (en) 1990-11-21 1990-11-21 ELECTRONIC SEARCH SYSTEM

Country Status (3)

Country Link
AU (1) AU9029391A (en)
SE (1) SE467640B (en)
WO (1) WO1992009906A1 (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE508835C2 (en) 1996-11-26 1998-11-09 Tagmaster Ab transponder
SE517845C2 (en) * 2000-12-05 2002-07-23 Ericsson Telefon Ab L M An antenna arrangement and a communication device comprising such an arrangement
DE10213769A1 (en) * 2002-03-27 2003-10-23 Tracto Technik Procedure for determining the position of a drill head in the ground
SE527183C2 (en) * 2003-05-13 2006-01-17 Jean Paul Link Access control and location systems
US11415667B2 (en) * 2019-02-06 2022-08-16 The Boeing Company Signaling device for passively transmitting signals

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT374596B (en) * 1979-04-20 1984-05-10 Enander Bengt TO FIND AVALANCHE VICTIMS, ANSWERS TO BE WEARED ON THE BODY
US4656478A (en) * 1984-07-30 1987-04-07 Asulab S.A. Passive transponder for locating avalanche victims
CH668915A5 (en) * 1986-10-22 1989-02-15 Ebauchesfabrik Eta Ag PASSIVE TRANSPONDER.
FR2609813B1 (en) * 1987-01-19 1989-03-03 Midi Robois IDENTIFICATION AND / OR LOCATION METHOD AND SYSTEM, AND BEACON FOR IMPLEMENTING SAID METHOD
GB8806455D0 (en) * 1988-03-18 1988-04-20 Gen Electric Co Plc Position determining equipment

Also Published As

Publication number Publication date
AU9029391A (en) 1992-06-25
SE467640B (en) 1992-08-17
SE9003698D0 (en) 1990-11-21
WO1992009906A1 (en) 1992-06-11

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