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WO2006030060A1 - Agencement d'essai pour transpondeurs rfid - Google Patents

Agencement d'essai pour transpondeurs rfid Download PDF

Info

Publication number
WO2006030060A1
WO2006030060A1 PCT/FI2005/000388 FI2005000388W WO2006030060A1 WO 2006030060 A1 WO2006030060 A1 WO 2006030060A1 FI 2005000388 W FI2005000388 W FI 2005000388W WO 2006030060 A1 WO2006030060 A1 WO 2006030060A1
Authority
WO
WIPO (PCT)
Prior art keywords
transponder
energy
radiating element
radiating
receiving
Prior art date
Application number
PCT/FI2005/000388
Other languages
English (en)
Inventor
Francisco Nieto Montesano
Juan Carlos Pênás MANRIQUE
Original Assignee
Upm Rafsec Oy
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 Upm Rafsec Oy filed Critical Upm Rafsec Oy
Publication of WO2006030060A1 publication Critical patent/WO2006030060A1/fr

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K7/00—Methods or arrangements for sensing record carriers, e.g. for reading patterns
    • G06K7/10—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation
    • G06K7/10009—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation sensing by radiation using wavelengths larger than 0.1 mm, e.g. radio-waves or microwaves
    • G06K7/10366—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation sensing by radiation using wavelengths larger than 0.1 mm, e.g. radio-waves or microwaves the interrogation device being adapted for miscellaneous applications
    • G06K7/10465—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation sensing by radiation using wavelengths larger than 0.1 mm, e.g. radio-waves or microwaves the interrogation device being adapted for miscellaneous applications the interrogation device being capable of self-diagnosis, e.g. in addition to or as part of the actual interrogation process
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K7/00—Methods or arrangements for sensing record carriers, e.g. for reading patterns
    • G06K7/0008—General problems related to the reading of electronic memory record carriers, independent of its reading method, e.g. power transfer
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K7/00—Methods or arrangements for sensing record carriers, e.g. for reading patterns
    • G06K7/0095—Testing the sensing arrangement, e.g. testing if a magnetic card reader, bar code reader, RFID interrogator or smart card reader functions properly
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/28—Testing of electronic circuits, e.g. by signal tracer
    • G01R31/282—Testing of electronic circuits specially adapted for particular applications not provided for elsewhere
    • G01R31/2822—Testing of electronic circuits specially adapted for particular applications not provided for elsewhere of microwave or radiofrequency circuits

Definitions

  • the present invention relates to a device for testing a transponder), the device comprising at least a radiating element for radiating RF energy to the transponder , and a receiving element for receiving RF energy coupled from the radiating element via a resonant circuit of the transponder.
  • the invention also relates to a system for testing a transponder , the system comprising a measurement probe which comprises at least a radiating element for radiating RF energy to the transponder , and a receiving element for receiving RF energy coupled from the radiating element via a resonant circuit of the transponder.
  • the invention further relates to a method for testing a transponder, the method comprising connecting RF energy to a radiating element of a measurement probe for radiating the RF energy to the transponder, and receiving by a receiving element RF energy coupled from the radiating element via a resonant circuit of the transponder.
  • Passive RFID transponders get their energy from the RF field generated by a device usually referred as a RFID Reader or Coupler. There are several normalized frequencies to provide this RF field, and the transponder has to be matched to operate in one of these standard frequencies. It means that the electrical characteristics of the transponders have to be optimised to give maximum response at the required frequency, according to a set of design specifications.
  • the transponder resonant frequency has to match the design criteria, in order to give its maximum response (that is, the maximum energization distance), while the Quality factor (Q), has to be chosen to allow the required signal bandwidth for the data transmission (reader to transponder and transponder to reader communication).
  • the testing device comprises two inductances which are located coaxially parallel.
  • the testing device needs to be positioned near the antenna resonance circuit preferably in such a way that the axes of the inductances of the testing device and the inductance of the antenna resonance circuit are coaxial.
  • One of the inductances of the testing device radiates electromagnetic energy at a certain frequency.
  • the other inductance of the testing device is used as a receiver for the radiated electromagnetic energy.
  • the ratio between the radiated and received energy is affected by the mutual inductances between the radiating inductance and the inductance of the antenna resonance circuit of the RFID transponder and between the receiving inductance and the inductance of the antenna resonance circuit of the RFID transponder.
  • a contactless method for measuring electrical characteristics of RFID transponders based on the coupling of two uncoupled antennas through the transponder resonant circuit.
  • One of the antennas is used as a transmission antenna. It radiates RF energy in the frequency range of interest.
  • the other antenna is used as a reception antenna.
  • the geometry and environment of the antennas have been carefully designed to provide as much isolation as possible between them in order to minimize coupling. In this condition, the energy detected by the RX antenna coming from the TX antenna is kept below a certain level in the frequency range of interest. This level will define the sensitivity of the measuring antenna.
  • the device according to the present invention is primarily characterised in that the radiating element and the receiving element are antennas.
  • the system according to the present invention is primarily characterised in that the radiating element and the receiving element are antennas.
  • the method according to the present invention is primarily characterised in that the method comprises using antennas as the radiating element and the receiving element .
  • the antenna according to the present invention solves the problem of the coupling between the transponder under test, and the testing device (e.g. a spectrum analyser or a network analyser).
  • the antenna constitutes a specialised test probe for the measurement of this type of electronic devices.
  • the contactless method according to the invention offers some advantages over previous contact methods based on RF measurements using standard RF probes. First, it is easier to implement in particular in manufacturing environments because no precise mechanics is needed to make the electrical contact with the transponder circuit. It also reduces (when properly designed) the effect of the measuring device on the measurement.
  • test procedure In manufacturing environments, only a functional test was usually performed (reading and/or writing the transponder memory contents). The possibility to include electrical tests on the test procedure provides additional data to accept/reject samples, and to take decisions based on statistical information to control the manufacturing process.
  • FIG. 1 depicts a system according to an example embodiment of the present invention as a block diagram
  • Fig. 2 depicts an example of a measurement probe according to the present invention
  • Fig. 3 shows an example of measurement results of a test performed by the system according to the present invention.
  • Fig. 1 an example of the system 1 of the present invention is illustrated as a block diagram.
  • the system comprises a measurement probe 2, a frequency generator 3, a receiver 4, and an analysing device 5 which comprises e.g. a display 5.1 for presenting measurement results and memory 5.2 for storing the measurement results.
  • the probe 2 comprises a radiating element 2.1 and a receiving element 2.2. There is also a shielding 2.3 between the radiating element 2.1 and the receiving element 2.2 to minimize the mutual coupling between the radiating 2. land the receiving elements 2.2.
  • the frequency generator 3 is connected to the radiating element 2.1 for providing RF energy to the radiating element 2.1.
  • the receiving element 2.2 is connected to the receiver 4 for connecting the RF energy received by the receiving element 2.2 to the analysing device.
  • the frequency generator 3 When the device 6, e.g. a passive RFID transponder, is to be tested the frequency generator 3 is set to generate RF energy at a certain frequency. The frequency depends on the planned operating frequency of the device 6 to be tested and allowed tolerances in the operating frequency. For example, the device may be designed to operate on a frequency range between a first frequency f1 and a second frequency f2. The frequency generator 3 is then set to produce RF signal at a frequency which is in the frequency range f1-f2 i.e. between the first f1 and the second frequency f2. The measurement probe 2 is placed near the device 6, preferably near the antenna 6.1 of the device 6. The antenna 6.1 is part of a resonant circuit through which energy is supplied to the device 6 and information is transmitted from the device 6.
  • the radiating element 2.1 radiates RF energy to the device 6. Some of the energy is coupled through the resonant circuit of the device 6 to the receiving element 2.2 of the measurement probe 2.
  • the receiver 4 receives the RF energy coupled to the receiving element 2.2 and forms a low frequency signal or a DC signal on the basis of the field strength of the received RF energy.
  • the signal is connected to the analysing device 5 which may store information on the signal to the memory 5.2 and display the information on the display 5.1.
  • the analysing device 5 may also display the reference information which may have been stored previously to the memory 5.2 of the analysing device 5. Now it is possible to compare the amount of energy coupled from the radiating element 2.1 without the device 6 and when the device 6 is under test. The difference in the energy levels indicates the amount of coupling and hence the electrical characteristics of the device 6 on the measurement frequency.
  • the electrical properties of the measurement probe 2 are analysed and stored into the memory 5.2 of the analysing device 5 before performing the measurements for the device 6. Therefore, it is possible to analyse the difference of the RF energy coupled from the radiating element 2.2 to the receiving element 2.2 without the device 6 and when the device 6 is near the measurement probe 2.
  • the testing may also be performed in steps in the following way.
  • the operational frequency range f1-f2 in which the device 6 should operate is determined.
  • the frequency range to be measured is defined so that it is includes the operational frequency range.
  • the frequency generator 3 is set to a starting frequency which is, for example, the first frequency f1. Then the measurement is performed on that frequency and the result is stored. The frequency of the frequency generator 3 is changed a little towards the second frequency and the measurement process is repeated on that frequency. The measurements are repeated on the whole frequency range f1-f2. Therefore, after the frequency range is measured the characteristics of the device 6 on that frequency range f1-f2 are known.
  • the number of steps of the above described range measurement method depends inter alia on the accuracy on which the device 6 should be analysed.
  • the changes in the measurement frequency between the repetitions is not necessarily linear but may also be logarithmic. In other words, the change of the : frequency is smaller near the lower limit of the frequency range than near the higher limit of the frequency range.
  • the radiating element 2.1 with a given electrical characteristic like usually found in transponders
  • DUT device 6 under test
  • the level of the signal detected in the receiving element 2.2 is a direct measure of the electrical response of the device 6 under test. If the RF signal is swapped through the frequency range of interest, a plot of the frequency response of the device 6 under test will be easily obtained.
  • the elements 2.1, 2.2 of the measurement probe 2 should be designed to provide good impedance and flat response over the frequency range of interest. Usually a couple of radiating elements 2.1, 2.2 used as TX and RX antennas with its resonance at a frequency much higher than this frequency range is used.
  • the coupling of both radiating elements 2.1 , 2.2 with the device 6 under test should to be maximized, in order to obtain enough dynamic range for a given measurement.
  • the measurement probe 2 comprises a substrate 2.3 on which the radiating element 2.1 and the receiving element 2.2 are formed.
  • the first radiating element 2.1 is partly surrounded by a first shielding 2.4 and he receiving element 2.2 is partly surrounded by a second shielding 2.5.
  • the invention is not restricted to such construction but one of the shieldings 2A ⁇ 2.5 may not be required.
  • the purpose of the shieldings 2.4, 2.5 is to minimize the direct coupling of RF signals between the radiating element 2.1 and the receiving element 2.2 so that the measurement results would be as reliable as possible.
  • the measurement probe 2 also comprises a signal input wiring 2.6 for inputting RF energy from the frequency generator 3 and a signal output wiring 2.7 for outputting the measurement results to the receiver 4.
  • the radiating element 2.1 and the receiving element 2.2 are monopole antennas but also other antenna structures are possible.
  • the use of antennas instead of resonance circuits enables that the measurement probe 2 can be used on a broader frequqency range than measurement probes of prior art.
  • the radiating element 2.1 and the receiving element 2.2 can be produced, for example, by using wires, by forming them on a printed circuit board, etc.
  • the elements 2.1, 2.2 may also be provided with radiators.
  • Fig. 3 an example of measurement results of a test performed by the system according to the present invention are shown.
  • the curve 301 represents the properties of the measurement probe without the device 6 (a weak coupling between the elements 2.1, 2.2) and the curve 302 represents the properties of the measurement probe 2 when it is located near the device 6 under test (a strong coupling between the elements 2.1, 2.2).

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Artificial Intelligence (AREA)
  • Theoretical Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Computer Vision & Pattern Recognition (AREA)
  • Toxicology (AREA)
  • General Health & Medical Sciences (AREA)
  • Electromagnetism (AREA)
  • Biomedical Technology (AREA)
  • Measurement Of Resistance Or Impedance (AREA)
  • Radar Systems Or Details Thereof (AREA)

Abstract

L'invention concerne un dispositif (2) permettant de soumettre un transpondeur (6) à un essai. Ledit dispositif (2) comprend au moins un élément rayonnant (2.1) permettant de transmettre par rayonnement de l'énergie R.F. au transpondeur (6), et un élément de réception (2.2) permettant de recevoir l'énergie R.F. couplée provenant de l'élément rayonnant (2.1) via un circuit résonant du transpondeur (6). L'élément rayonnant (2.1) et l'élément de réception (2.2) sont des antennes. L'invention concerne également un système et un procédé.
PCT/FI2005/000388 2004-09-14 2005-09-09 Agencement d'essai pour transpondeurs rfid WO2006030060A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI20045341A FI116989B (fi) 2004-09-14 2004-09-14 Testausjärjestely RFID-transpondereita varten
FI20045341 2004-09-14

Publications (1)

Publication Number Publication Date
WO2006030060A1 true WO2006030060A1 (fr) 2006-03-23

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WO (1) WO2006030060A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007131268A1 (fr) * 2006-05-17 2007-11-22 Callidan Instruments Pty Ltd Sonde hyperfréquence
WO2013144451A1 (fr) 2012-03-30 2013-10-03 Voyantic Oy Système et procédé de test d'étiquettes radiofréquences
DE102013003693A1 (de) * 2013-03-04 2014-09-04 Giesecke & Devrient Gmbh Verfahren und Vorrichtung zum Prüfen einer Mehrzahl von Antennen
CN108828430A (zh) * 2018-06-01 2018-11-16 北京智芯微电子科技有限公司 超高频rfid标签芯片的多同测可靠性的测试系统及方法

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07248347A (ja) * 1994-03-09 1995-09-26 Toyo Alum Kk 共振器の特性評価装置
US6104291A (en) * 1998-01-09 2000-08-15 Intermec Ip Corp. Method and apparatus for testing RFID tags
US6236223B1 (en) * 1998-11-09 2001-05-22 Intermec Ip Corp. Method and apparatus for wireless radio frequency testing of RFID integrated circuits
WO2002088762A2 (fr) * 2001-04-26 2002-11-07 Mühlbauer Ag Procede et dispositif conçus pour tester sans contact une antenne non equipee
JP2004072175A (ja) * 2002-08-01 2004-03-04 Nippon Signal Co Ltd:The トランスポンダ

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07248347A (ja) * 1994-03-09 1995-09-26 Toyo Alum Kk 共振器の特性評価装置
US6104291A (en) * 1998-01-09 2000-08-15 Intermec Ip Corp. Method and apparatus for testing RFID tags
US6236223B1 (en) * 1998-11-09 2001-05-22 Intermec Ip Corp. Method and apparatus for wireless radio frequency testing of RFID integrated circuits
WO2002088762A2 (fr) * 2001-04-26 2002-11-07 Mühlbauer Ag Procede et dispositif conçus pour tester sans contact une antenne non equipee
JP2004072175A (ja) * 2002-08-01 2004-03-04 Nippon Signal Co Ltd:The トランスポンダ

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
"the authoritative dictionary of IEEE standard terms", December 2000, IEEE, USA, XP002357684 *
PATENT ABSTRACTS OF JAPAN vol. 1996, no. 01 31 January 1996 (1996-01-31) *
PATENT ABSTRACTS OF JAPAN vol. 2003, no. 12 5 December 2003 (2003-12-05) *

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007131268A1 (fr) * 2006-05-17 2007-11-22 Callidan Instruments Pty Ltd Sonde hyperfréquence
US7982470B2 (en) 2006-05-17 2011-07-19 Callidan Instruments Pty. Ltd. Microwave probe device
WO2013144451A1 (fr) 2012-03-30 2013-10-03 Voyantic Oy Système et procédé de test d'étiquettes radiofréquences
DE102013003693A1 (de) * 2013-03-04 2014-09-04 Giesecke & Devrient Gmbh Verfahren und Vorrichtung zum Prüfen einer Mehrzahl von Antennen
CN108828430A (zh) * 2018-06-01 2018-11-16 北京智芯微电子科技有限公司 超高频rfid标签芯片的多同测可靠性的测试系统及方法

Also Published As

Publication number Publication date
FI20045341A0 (fi) 2004-09-14
FI116989B (fi) 2006-04-28

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