GB1354947A - Identification systems and identification transmitters therefor - Google Patents

Identification systems and identification transmitters therefor

Info

Publication number
GB1354947A
GB1354947A GB4816871A GB4816871A GB1354947A GB 1354947 A GB1354947 A GB 1354947A GB 4816871 A GB4816871 A GB 4816871A GB 4816871 A GB4816871 A GB 4816871A GB 1354947 A GB1354947 A GB 1354947A
Authority
GB
United Kingdom
Prior art keywords
frequency
coding
received
ghz
mobile transmitter
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.)
Expired
Application number
GB4816871A
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.)
Stiftelsen Institutet for Mikrovagsteknik Vid Tekniska Hogskolan
Original Assignee
Stiftelsen Institutet for Mikrovagsteknik Vid Tekniska Hogskolan
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 Stiftelsen Institutet for Mikrovagsteknik Vid Tekniska Hogskolan filed Critical Stiftelsen Institutet for Mikrovagsteknik Vid Tekniska Hogskolan
Publication of GB1354947A publication Critical patent/GB1354947A/en
Expired 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
    • G01S13/74—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
    • G01S13/765—Systems using reradiation of radio waves, e.g. secondary radar systems; Analogous systems wherein pulse-type signals are transmitted with exchange of information between interrogator and responder
    • 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
    • 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
    • G01S13/758—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 powered by the interrogation signal
    • G—PHYSICS
    • G08—SIGNALLING
    • G08G—TRAFFIC CONTROL SYSTEMS
    • G08G1/00—Traffic control systems for road vehicles
    • G08G1/01—Detecting movement of traffic to be counted or controlled
    • G08G1/017—Detecting movement of traffic to be counted or controlled identifying vehicles

Landscapes

  • Engineering & Computer Science (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Radar Systems Or Details Thereof (AREA)
  • Radio Relay Systems (AREA)

Abstract

1354947 Transponders STIFTELSEN INSTITUTET FOR MIKROVAGSTEKNIK VIO TEKNISKA HOGSKOLAN I STOCKHOLM 15 Oct 1971 [15 Oct 1970] 48168/71 Heading H4L A mobile transmitter 26, 27 receives a signal from a monitor station 20, multiplies it with a non-linear device 26, applies a coding modulation, and retransmits to a receiver 23 at the monitor station which decodes at 24 and thereby identifies the mobile transmitter. The system is used for traffic identification purposes (Fig. 1, not shown). The frequency multiplier 26 employs a varactor diode, which doubles the frequency in the example given. The coding involves selected separations of pulses in a train; and the received and transmitted frequencies are 10 and 20 GHz respectively. The mobile transmitter may be passive (Fig. 3, not shown), the received signal from the monitor station having its frequency cyclically varied over a given range, for example, 9 to 10 GHz, the doubled frequency of the transmitted frequency consequently varying cyclically between 18 and 20 GHz. The coding is effected by parallel-connected series resonant circuits using unterminated transmission lines (Fig. 4, not shown) arranged 37 to reduce the amplitude of either the received or the transmitted signals at the resonant frequencies, these being selected to be within the appropriate range of cyclic variation. The signal received at the monitor (Fig. 6, not shown) is supplied to a registration unit 24 which identifies the coding.
GB4816871A 1970-10-15 1971-10-15 Identification systems and identification transmitters therefor Expired GB1354947A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE1395770A SE346388B (en) 1970-10-15 1970-10-15 DEVICE FOR REGISTRATION OF FOREMS

Publications (1)

Publication Number Publication Date
GB1354947A true GB1354947A (en) 1974-06-05

Family

ID=20298301

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4816871A Expired GB1354947A (en) 1970-10-15 1971-10-15 Identification systems and identification transmitters therefor

Country Status (6)

Country Link
AU (1) AU3444071A (en)
CA (1) CA947823A (en)
DE (1) DE2151105B2 (en)
FR (1) FR2110450B3 (en)
GB (1) GB1354947A (en)
SE (1) SE346388B (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5822685A (en) * 1993-11-30 1998-10-13 Gec Marconi, Limited Modulating reflector circuit
EP1122684A3 (en) * 2000-02-02 2001-10-04 Robert Bosch Gmbh Radio-identification system and method

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4242661A (en) * 1975-03-27 1980-12-30 Stifelsen Institutet for Mikrovagsteknik Vid Tekniska Hogskolan i Stockholm Device for registration of objects
GB1555606A (en) * 1975-03-27 1979-11-14 Stiftelsen Inst Mikrovags Systems for the registration of objects
DE3345829A1 (en) * 1983-12-19 1985-06-27 Központi Bányászati Fejlesztési Intézet, Budapest Control system, particularly for registering persons in mining
GB8825740D0 (en) * 1988-11-03 1988-12-07 Smith D Improvements in transmission & reception of electric signals carrying information
FR3127719B1 (en) 2021-10-04 2023-08-25 Psa Automobiles Sa CHECKING THE PRE-CONDITIONING OF A SLEEPING VEHICLE

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5822685A (en) * 1993-11-30 1998-10-13 Gec Marconi, Limited Modulating reflector circuit
EP1122684A3 (en) * 2000-02-02 2001-10-04 Robert Bosch Gmbh Radio-identification system and method

Also Published As

Publication number Publication date
DE2151105B2 (en) 1974-01-03
CA947823A (en) 1974-05-21
DE2151105A1 (en) 1972-04-20
FR2110450B3 (en) 1974-06-07
FR2110450A3 (en) 1972-06-02
SE346388B (en) 1972-07-03
AU3444071A (en) 1973-04-19

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee