WO1993015417A1 - Dispositif de transfert d'informations - Google Patents

Dispositif de transfert d'informations Download PDF

Info

Publication number
WO1993015417A1
WO1993015417A1 PCT/SE1993/000030 SE9300030W WO9315417A1 WO 1993015417 A1 WO1993015417 A1 WO 1993015417A1 SE 9300030 W SE9300030 W SE 9300030W WO 9315417 A1 WO9315417 A1 WO 9315417A1
Authority
WO
WIPO (PCT)
Prior art keywords
transponder
antenna
microwave signal
ground plane
dielectric material
Prior art date
Application number
PCT/SE1993/000030
Other languages
English (en)
Inventor
Staffan Gunnarsson
Original Assignee
Saab-Scania Combitech Aktiebolag
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
Priority claimed from SE9200210A external-priority patent/SE9200210L/xx
Application filed by Saab-Scania Combitech Aktiebolag filed Critical Saab-Scania Combitech Aktiebolag
Publication of WO1993015417A1 publication Critical patent/WO1993015417A1/fr

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K19/00—Record carriers for use with machines and with at least a part designed to carry digital markings
    • G06K19/06—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code
    • G06K19/067—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components
    • G06K19/07—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components with integrated circuit chips
    • G06K19/077—Constructional details, e.g. mounting of circuits in the carrier
    • G06K19/07749—Constructional details, e.g. mounting of circuits in the carrier the record carrier being capable of non-contact communication, e.g. constructional details of the antenna of a non-contact smart card
    • G06K19/07758—Constructional details, e.g. mounting of circuits in the carrier the record carrier being capable of non-contact communication, e.g. constructional details of the antenna of a non-contact smart card arrangements for adhering the record carrier to further objects or living beings, functioning as an identification tag
    • 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
    • G01S13/767—Responders; Transponders
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K19/00—Record carriers for use with machines and with at least a part designed to carry digital markings
    • G06K19/06—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code
    • G06K19/067—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components
    • G06K19/07—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components with integrated circuit chips
    • G06K19/077—Constructional details, e.g. mounting of circuits in the carrier
    • G06K19/07749—Constructional details, e.g. mounting of circuits in the carrier the record carrier being capable of non-contact communication, e.g. constructional details of the antenna of a non-contact smart card
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K19/00—Record carriers for use with machines and with at least a part designed to carry digital markings
    • G06K19/06—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code
    • G06K19/067—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components
    • G06K19/07—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components with integrated circuit chips
    • G06K19/077—Constructional details, e.g. mounting of circuits in the carrier
    • G06K19/07749—Constructional details, e.g. mounting of circuits in the carrier the record carrier being capable of non-contact communication, e.g. constructional details of the antenna of a non-contact smart card
    • G06K19/07773—Antenna details
    • G06K19/07786—Antenna details the antenna being of the HF type, such as a dipole
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/12—Supports; Mounting means
    • H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
    • H01Q1/24—Supports; Mounting means by structural association with other equipment or articles with receiving set
    • H01Q1/247—Supports; Mounting means by structural association with other equipment or articles with receiving set with frequency mixer, e.g. for direct satellite reception or Doppler radar
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q23/00—Antennas with active circuits or circuit elements integrated within them or attached to them

Definitions

  • the present invention relates to a device for information transmission, a so-called transponder, for receiving a first microwave signal, modulating and coding, -and retransmitting a second microwave signal, comprising at least one antenna means designed in micro strip technique and a ground plane.
  • a solution to the problem is to use optically coded tags, for example bar or dot codes, which are read with the aid of code readers after which freight data is fetched from a central data base which has been c ⁇ r ⁇ tunicated over the tele or satellite network.
  • a problem with that solution is how to update the data bases reliably across large geographic distances. Another problem is that the method is expensive, as principally all conceivable places of desti ⁇ nation must be provided with the intended information beforehand to admit access to the documents if the goods unintentionally would have arrived at an incorrect destination. A third inconvenience is that optic codes are sensitive to the mechanical damages that are likely to occur when the goods are handled.
  • the technique of the transponder referred to further describes a special substrate with double dielectric material and components located on either side of it, which solution is difficult to make c ⁇ pact and inexpensive because the shown substrate is expensive. It also requires expensive electric vias in the substrate.
  • the transponder has also the disadvantage of becoming relatively thick, since space must be made inside the case for the c ⁇ ponents that are located on either side of the substrate.
  • the transponder will sometimes be located on surfaces which are not of metal, for example cardboard boxes and wooden pallets, whereby the advantage described in 9002493-6 in making the ground plane as small as the antenna element cannot always be made use of.
  • the object of the invention is to achieve a device of the kind mentioned in the introduction, which is suitable for programming in the field, can be read fr ⁇ n a great distance and at the same time is sufficient ⁇ ly inexpensive in manufacturing, and c ⁇ pact for being located on specific parcels and the like.
  • the antenna layer of the antenna means is provided with a recess, in which at least some of the electronic components and/or micro strip conduits of the transponder are located.
  • the antenna layer and the micro strip conduits are arranged to cooperate, through a substrate of a dielectric material, with the ground plane, because of which electric vias through the substrate are unnecessary.
  • the size of the substrate can be minimized.
  • the substrate that is the dielectric material
  • the substrate that is the dielectric material, consists of a circuit card, located inside a case for the transponder.
  • a component preferably a diode, is arranged to effect modulation as well as detection of the first microwave signal.
  • This c ⁇ nponent, or the required c ⁇ nponents can suitably be integrated in the same electronic circuit, which comprises the oscillator and data memory circuits of the transponder.
  • the device can naturally be geometrically designed in many ways.
  • One advantageous embodiment is that it consists of a compact box, intended to be attached on objects such as parcels or containers, included in material flow.
  • the device is arranged to admit information transmission at which the first and/or second microwave signal is/are entirely or partly cryptated, for example according to DES or RSA.
  • Figure 1 shows a block diagram of a known transponder for information transmission
  • Figure 2 shows a view of a section through a device according to the invention
  • Figure 3 shows a view fr ⁇ n above of the device in Figure 2 , with a removed upper cover.
  • the transponder in Figure 1 shows an antenna 1, a modulator-demodulator unit 2, an oscillator-memory circuit 3 and a power source in the form of a battery 5.
  • the antenna 1 receives a microwave frequency, for example at 2.45 GHz, from a transmitter/receiver unit and leads this signal further to modu ⁇ lation circuits in the modulator-demodulator unit 2.
  • the modulator supplies information to the signal received by the transponder, and returns this modulated signal to the antenna 1, so that the information is radiated out in space in front of the transponder to the transmitter/receiver unit so that the latter can read information from the transponder.
  • a modulated microwave signal is transmitted to the antenna 1, is demodulated in the circuit 2 and stored in a memory in the oscillator-memory circuit 3.
  • the modulator circuits are guided frcm the oscillator with a signal with low frequency compared with the microwave frequency, for example 32.8 kHz.
  • a power source in the unit 5 provides the oscillator-memory circuit 3 with voltage.
  • the device according to the invention comprises a patch antenna 6 acting towards a ground plane 7 through a substrate 11 of a dielectric material.
  • a recess 8 is made in the patch antenna, that is the antenna layer 6.
  • the dielectric material constitutes in this case at the same time a case for the transponder.
  • the shown antenna in which the antenna layer 6 has approximately as large a surface as the ground plane 7, will if located in free space radiate approximately as much in both directions of the perpendiculars, whereas if the ground plane 7 is considerably larger than the antenna layer 6, the radiation will be directed out from the antenna layer.
  • the latter embodiment may be of special interest when the invention is placed on a surface of non-reflecting material and where simultaneously reflecting objects can be expected to occur on equal multiples of half a wavelength behind the transponder.
  • the radiation originates from the edges of the antenna layer, and that no real radiation is formed directly from the central parts of the antenna layer surface.
  • This surface can therefore be used for other purposes, for example, to mount in the recess 8, inside the antenna layer 6, the circuits that are required for achieving, with a modulator/demodulator diode 9, an electric modulation with information in the feeding point 10, and for receiving, from the feeding point of the antenna layer, and detecting, in the diode 9, inc ⁇ ning signals.
  • a signal caught by the antenna layer 6 will give an electric alternating field over the dielectric substrate 11 towards the ground plane 7 in the feeding point 10 of the antenna.
  • the received signal is guided by the micro strip conduit 12 to the diode 9, which is connected with one end in the point 14 and its other end in the point 13 (the point 15 is not connected inside the diode enclosure).
  • the resistance of the diode can be varied between different values depend ⁇ ing on what voltage is put over these terminals.
  • One end of the diode is from a microwave viewpoint short-circuited to the ground plane 7 by the open quarter wave guide 18, and will therefore, depending on the output voltage from the circuit 16, microwavewise more or less connect the point 13 to the ground plane 7.
  • the above described resistance variation in the diode 9 will bring about that a wave front incident on the antenna layer 6 will give rise to a reflex modulated with information, where instantaneous phase position and amplitude are affected by the resistance in the diode 9.
  • the circuit 16 is brought to contain data information that is made to act upon the resistance of the diode 9, for example by varying the fre ⁇ quency or phase of an alternating voltage on output 19 in a way repre ⁇ sentative for data information, a transponder has been achieved whose data on radiation can be read with the aid of an external communication unit.
  • the communication unit is made to receive and decode the signal reflected frcm the transponder and modulated with data.
  • connections 20 and 17 feed voltage to the transponder circuit 16 frcm the power source 21.
  • connection 17 has for space reasons been located in a break in the outer edge 7 of the antenna layer, but this is of no consequence for the functioning of the antenna since the antenna has a ⁇ nimum of current in this point. It could just as well be unbroken as shown in the dashed surface 22.
  • the diode 15 is also used to a plitudinally detect a signal incident on the transponder, which, if it represents a data flow to the transponder, makes writing of data into the circuit 16 possible.
  • the data signal then reaches the memory in the circuit 16 via a connection condensor for data integrated in the circuit.
  • the circuit comprises an aut ⁇ natic switch circuit between the modulation mode and demodulation mode, in that at even intervals it is connected for detection and analysis of whether microwave pulses incide on the diode 9.
  • diode 9 is as a rectifyer of microwave pulses to be used for power supply of the transponder instead of, or as a com ⁇ plement to its inbuilt power source 21.
  • the diode 15 can also be integrated in the circuit 16, so that a trans ⁇ ponder with only one component in addition to the substrate is made possible.
  • the antenna layer can further be provided with one additional feeding point so that the transponder in a known manner at the same time can function in two orthogonal polarisations.
  • the antenna layer recess can also be formed asymmetrically in different ways for example to make the polarisation of the transponder circular.
  • the antenna layer can also be given another embodiment, for example rectangular, without its principle of function being changed.
  • the modulation circuits can also be formed in other ways, for example by ccmpleting the diode 15 with, or replacing it by other components, for example transistors, preferably of field effect type.
  • the transponder In order to avoid demands that the transponder shall be oriented in any specific manner relative to the axis of rotation from the. trans ⁇ mitter/receiver, it can be designed for transmitting and receiving circu ⁇ larly polarised waves.
  • the transponder will in this case, if it is linearly polarised, still be capable of being turned about said axis without loss of signal, since a circularly polarised wave contains E-fields in all directions perpendicular from the propagation direction.
  • the device In case a very high degree of safety is required, for example if the device is to store value related information such as electronic punches or money, it can be provided with means that give sufficient safety against unauthorized access. This can be done in a similar way as for money cards of magnetic strip type, for electronic memory cards or for microprocessor cards. In the latter case a microprocessor with cryptating functions, for example the standardized DES and RSA algorithms, can be implemented.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Computer Hardware Design (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Theoretical Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Radar Systems Or Details Thereof (AREA)

Abstract

Dispositif pour la transmission de l'information, désigné sous le nom de transpondeur, conçu pour recevoir un premier signal micro-onde, moduler et coder, et retransmettre un second signal micro-onde. Il comprend au moins un dispositif d'antenne conçu selon la technique des microlignes sur un plan de terre. Le dispositif est d'abord caractérisé par le fait que la couche antenne (6) du dispositif d'antenne est équipée avec un évidement (8) dans lequel au moins quelques composants électroniques (9, 16) du transpondeur et/ou conduits de microligne (12, 18) sont positionnés. Selon cette version du dispositif, celui-ci est compact, léger, d'une fabrication non coûteuse et il procure un lobe d'antenne bien défini et bien dirigé. Le dispositif possède ainsi une bonne portée et il est spécialement adapté pour être utilisé dans la manutention de matériels comme par exemple les paquets et les containers.
PCT/SE1993/000030 1992-01-23 1993-01-21 Dispositif de transfert d'informations WO1993015417A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE9200210A SE9200210L (sv) 1991-07-05 1992-01-23 Anordning foer informationsoeverfoering
SE9200210-4 1992-01-23

Publications (1)

Publication Number Publication Date
WO1993015417A1 true WO1993015417A1 (fr) 1993-08-05

Family

ID=20385116

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/SE1993/000030 WO1993015417A1 (fr) 1992-01-23 1993-01-21 Dispositif de transfert d'informations

Country Status (2)

Country Link
AU (1) AU3465293A (fr)
WO (1) WO1993015417A1 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0651459A1 (fr) * 1993-11-02 1995-05-03 AT&T Corp. Antenne microbandes pour micro-ondes à détecteur intégré
FR2735929A1 (fr) * 1995-06-22 1996-12-27 France Telecom Carte sans contact passive
EP0871236A2 (fr) * 1997-04-11 1998-10-14 Nokia Mobile Phones Ltd. Agencement d'antenne pour appareil de communication radio de petite dimension
WO2001003243A1 (fr) * 1999-06-30 2001-01-11 Siemens Aktiengesellschaft Ensemble avec antenne
GB2391319A (en) * 2002-07-29 2004-02-04 Univ Michigan Tech Transponder microwave telemetry
EP1724714A2 (fr) * 2005-05-13 2006-11-22 NRC International Inc. Antenne Patch pour l'étiquette RFID

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4303904A (en) * 1979-10-12 1981-12-01 Chasek Norman E Universally applicable, in-motion and automatic toll paying system using microwaves
US4857893A (en) * 1986-07-18 1989-08-15 Bi Inc. Single chip transponder device
US4987421A (en) * 1988-06-09 1991-01-22 Mitsubishi Denki Kabushiki Kaisha Microstrip antenna
WO1992001952A1 (fr) * 1990-07-24 1992-02-06 Staffan Gunnarsson Systeme pour positionner un premier objet par rapport a un deuxieme objet
WO1992001953A1 (fr) * 1990-07-24 1992-02-06 Saab-Scania Combitech Aktiebolag Dispositif de transmission d'informations

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4303904A (en) * 1979-10-12 1981-12-01 Chasek Norman E Universally applicable, in-motion and automatic toll paying system using microwaves
US4857893A (en) * 1986-07-18 1989-08-15 Bi Inc. Single chip transponder device
US4987421A (en) * 1988-06-09 1991-01-22 Mitsubishi Denki Kabushiki Kaisha Microstrip antenna
WO1992001952A1 (fr) * 1990-07-24 1992-02-06 Staffan Gunnarsson Systeme pour positionner un premier objet par rapport a un deuxieme objet
WO1992001953A1 (fr) * 1990-07-24 1992-02-06 Saab-Scania Combitech Aktiebolag Dispositif de transmission d'informations

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0651459A1 (fr) * 1993-11-02 1995-05-03 AT&T Corp. Antenne microbandes pour micro-ondes à détecteur intégré
EP0750276A3 (fr) * 1995-06-22 2000-02-23 France Telecom Carte sans contact passive
FR2735929A1 (fr) * 1995-06-22 1996-12-27 France Telecom Carte sans contact passive
EP0750276A2 (fr) * 1995-06-22 1996-12-27 France Telecom Carte sans contact passive
US5841123A (en) * 1995-06-22 1998-11-24 France Telecom Passive card without contact
USRE41301E1 (en) * 1995-06-22 2010-05-04 France Telecom Passive card without contact
EP0871236A2 (fr) * 1997-04-11 1998-10-14 Nokia Mobile Phones Ltd. Agencement d'antenne pour appareil de communication radio de petite dimension
EP0871236A3 (fr) * 1997-04-11 1999-07-28 Nokia Mobile Phones Ltd. Agencement d'antenne pour appareil de communication radio de petite dimension
WO2001003243A1 (fr) * 1999-06-30 2001-01-11 Siemens Aktiengesellschaft Ensemble avec antenne
GB2391319A (en) * 2002-07-29 2004-02-04 Univ Michigan Tech Transponder microwave telemetry
US6999000B2 (en) 2002-07-29 2006-02-14 The Board Of Control Of Michigan Technological University Transponder-based microwave telemetry apparatus
GB2391319B (en) * 2002-07-29 2006-02-15 Univ Michigan Tech Transponder-based microwave telemetry apparatus
EP1724714A2 (fr) * 2005-05-13 2006-11-22 NRC International Inc. Antenne Patch pour l'étiquette RFID
EP1724714A3 (fr) * 2005-05-13 2006-12-13 NRC International Inc. Antenne Patch pour l'étiquette RFID
US7605706B2 (en) 2005-05-13 2009-10-20 The Kennedy Group, Inc. Patch antenna for RFID tag

Also Published As

Publication number Publication date
AU3465293A (en) 1993-09-01

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