NO944864L - Method and apparatus for generating a code response on an incident electromagnetic wave - Google Patents

Method and apparatus for generating a code response on an incident electromagnetic wave

Info

Publication number
NO944864L
NO944864L NO944864A NO944864A NO944864L NO 944864 L NO944864 L NO 944864L NO 944864 A NO944864 A NO 944864A NO 944864 A NO944864 A NO 944864A NO 944864 L NO944864 L NO 944864L
Authority
NO
Norway
Prior art keywords
electromagnetic wave
pulse
generating
incident electromagnetic
code response
Prior art date
Application number
NO944864A
Other languages
Norwegian (no)
Other versions
NO944864D0 (en
Inventor
Akitomo Tanaka
Yasuhiro Sato
Original Assignee
Omron Tateisi Electronics 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 Omron Tateisi Electronics Co filed Critical Omron Tateisi Electronics Co
Publication of NO944864D0 publication Critical patent/NO944864D0/en
Publication of NO944864L publication Critical patent/NO944864L/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
    • G01S13/76—Systems using reradiation of radio waves, e.g. secondary radar systems; Analogous systems wherein pulse-type signals are transmitted
    • G01S13/78—Systems using reradiation of radio waves, e.g. secondary radar systems; Analogous systems wherein pulse-type signals are transmitted discriminating between different kinds of targets, e.g. IFF-radar, i.e. identification of friend or foe
    • 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
    • G01S13/756—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 a signal generator for modifying the reflectivity of the reflector

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

En elektromagnetisk bølge sendt ut fra en interrogator-enhet (l, l') mottas av en transponder-antenne (5) og omformes til en eneste puls ved hjelp av en demodulasjonskrets (7). I en pulsforsinker-generator (8) forsinkes den eneste puls sekven- sielt ved hjelp av forsinker-elementer (9) for derved å frembringe pulser som innbyrdes avviker i tid. En kode- innretning (11) genererer et særskilt kodet pulstog på grunnlag av de forsinkede pulser. Når hver puls i det kodede pulstog tilføres en modulasjonskrets (14), endres impedans- karakteristikken for modulasjonskretsen (14) og en impedans- tilpasningskrets (15). Som et resultat reflekterer transpond- er-antennen (S) den elektromagnetiske bølge som sendes ut fra interrogator-enheten.An electromagnetic wave emitted from an interrogator unit (1, 1 ') is received by a transponder antenna (5) and converted into a single pulse by a demodulation circuit (7). In a pulse delay generator (8), the only pulse is sequentially delayed by delay elements (9) to thereby produce pulses that differ in time. A coding device (11) generates a specially coded pulse train on the basis of the delayed pulses. When each pulse in the coded pulse train is applied to a modulation circuit (14), the impedance characteristic of the modulation circuit (14) and an impedance matching circuit (15) are changed. As a result, the transponder antenna (S) reflects the electromagnetic wave emitted from the interrogator unit.

NO944864A 1993-12-17 1994-12-15 Method and apparatus for generating a code response on an incident electromagnetic wave NO944864L (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP34423593A JPH07174845A (en) 1993-12-17 1993-12-17 Code responding method, core responder, and code responding system using the code responder

Publications (2)

Publication Number Publication Date
NO944864D0 NO944864D0 (en) 1994-12-15
NO944864L true NO944864L (en) 1995-06-19

Family

ID=18367679

Family Applications (1)

Application Number Title Priority Date Filing Date
NO944864A NO944864L (en) 1993-12-17 1994-12-15 Method and apparatus for generating a code response on an incident electromagnetic wave

Country Status (4)

Country Link
JP (1) JPH07174845A (en)
DE (1) DE4445285A1 (en)
GB (1) GB2285557A (en)
NO (1) NO944864L (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3299885B2 (en) * 1996-03-22 2002-07-08 和夫 坪内 Wireless data transceiver
DE19641022A1 (en) * 1996-10-07 1998-04-09 Abb Patent Gmbh Danger detector activation unit
DE19957557A1 (en) * 1999-11-30 2001-06-07 Siemens Ag Identification system, esp. for vehicle
GB2363498B (en) 2000-06-16 2005-06-01 Marconi Caswell Ltd Transponder device for generating a data bearing output
JP4757713B2 (en) * 2006-06-01 2011-08-24 三菱電機株式会社 Intruder identification device
JP5046092B2 (en) * 2006-12-15 2012-10-10 独立行政法人産業技術総合研究所 Temperature sensor, living body health management system
FR2946152B1 (en) * 2009-05-27 2016-07-08 Commissariat A L'energie Atomique HIGH-PRECISION ABSOLUTE HYPERFREQUENCY TELEMETER WITH MULTI-STATE REFLECTION DEVICE.

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3270338A (en) * 1961-03-24 1966-08-30 Gen Electric Identification system
US3273146A (en) * 1964-08-07 1966-09-13 Gen Electric Object identifying apparatus
GB1567750A (en) * 1975-09-19 1980-05-21 Seldown Electronics Ltd Transponders
DE2821299A1 (en) * 1978-05-16 1979-11-22 Siemens Ag DEVICE FOR IDENTIFICATION OF OBJECTS AND PERSONS
AU565454B2 (en) * 1984-10-09 1987-09-17 X-Cyte Inc. Saw transponder
CA1335676C (en) * 1988-01-14 1995-05-23 Akira Iga Portable data transmitter device and a system using the same
EP0710853A2 (en) * 1989-02-17 1996-05-08 Integrated Silicon Design Pty. Ltd Transponder system
JPH03113387A (en) * 1989-09-27 1991-05-14 Nippon Soken Inc Transponder for moving body identifying device
US5247305A (en) * 1990-10-10 1993-09-21 Nippondenso Co., Ltd. Responder in movable-object identification system
JP3008509B2 (en) * 1991-02-15 2000-02-14 オムロン株式会社 Transponder, identification system, and method of manufacturing transponder

Also Published As

Publication number Publication date
DE4445285A1 (en) 1995-06-22
GB2285557A (en) 1995-07-12
JPH07174845A (en) 1995-07-14
GB9425459D0 (en) 1995-02-15
NO944864D0 (en) 1994-12-15

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