EP2137791A1 - Système d'antennes rfid - Google Patents

Système d'antennes rfid

Info

Publication number
EP2137791A1
EP2137791A1 EP08735281A EP08735281A EP2137791A1 EP 2137791 A1 EP2137791 A1 EP 2137791A1 EP 08735281 A EP08735281 A EP 08735281A EP 08735281 A EP08735281 A EP 08735281A EP 2137791 A1 EP2137791 A1 EP 2137791A1
Authority
EP
European Patent Office
Prior art keywords
patch
rfid antenna
antennas
patch antennas
antenna system
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.)
Withdrawn
Application number
EP08735281A
Other languages
German (de)
English (en)
Inventor
Gerald Schillmeier
Frank Mierke
Thomas Lankes
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.)
Kathrein SE
Original Assignee
Kathrein Werke KG
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 Kathrein Werke KG filed Critical Kathrein Werke KG
Publication of EP2137791A1 publication Critical patent/EP2137791A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • 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
    • H01Q1/2208—Supports; Mounting means by structural association with other equipment or articles associated with components used in interrogation type services, i.e. in systems for information exchange between an interrogator/reader and a tag/transponder, e.g. in Radio Frequency Identification [RFID] systems
    • H01Q1/2216—Supports; Mounting means by structural association with other equipment or articles associated with components used in interrogation type services, i.e. in systems for information exchange between an interrogator/reader and a tag/transponder, e.g. in Radio Frequency Identification [RFID] systems used in interrogator/reader equipment
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q21/00—Antenna arrays or systems
    • H01Q21/06—Arrays of individually energised antenna units similarly polarised and spaced apart
    • H01Q21/061—Two dimensional planar arrays
    • H01Q21/065—Patch antenna array
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q7/00—Loop antennas with a substantially uniform current distribution around the loop and having a directional radiation pattern in a plane perpendicular to the plane of the loop

Definitions

  • the invention relates to an RFID antenna system with an RFID antenna device for an electronic article security system (EAS) and with an RFID antenna device for a goods identification system (WIS) according to the preamble of claim 1 ,
  • EAS electronic article security system
  • WIS goods identification system
  • electronic article security devices are used. These consist of RFID antenna systems, which are arranged at a distance from one another in the region of the exit or a passage and between which the passageway to be monitored is formed.
  • the corresponding products and goods available in the store are secured, for example, by means of an electronic article security label. If the goods are properly paid for, the salesperson will remove the corresponding counterfeit label, so that the customer can use the Goods can easily pass through the monitored exit passage.
  • an audible warning signal is generally output in the monitored area in order, for example, to report that an attempt is made to take unpaid goods out of the store.
  • radio-frequency labels are used.
  • a coil is provided whose terminal ends are capacitively connected to each other.
  • monitoring antennas transmitting antennas are used, which emit electromagnetic radiation, for example in a range of 6 to 10 MHz. If a corresponding RF label is passed through the monitoring area, it removes transmission energy from the system, which can be detected by means of a corresponding electronic evaluation device.
  • an electromagnetic method has become known in which to be secured on the goods long metal strips. These metal strips are made of a magnetizable alloy. If a product secured in this way is guided through the alternating magnetic field of the corresponding monitoring antennas which radiate, for example, at a frequency of 10 Hz to 20 KHz, this leads to a saturation magnetization of the metal strips, the steep flanks of the metal strips Magnetization generate harmonics in the alternating field, which are detectable.
  • the aforementioned EAS systems operate in the manner of a 1-bit transponder in which the presence or absence of a particular tag in the monitoring and reading area can be detected.
  • UHF RFID methods are also used for article entry and identification.
  • a product to be detected is provided with an RFID tag.
  • This method offers to the above-mentioned method, first of all, the significant advantage that not only a single bit can be evaluated as information by means of an RFID tag, but that these UHF RFID tags are provided with a microchip on which information with a Word length can be stored from several locations and read from them.
  • so-called passive RFIDs are used which receive their energy for reading out the tag contents and returning the corresponding information from the electromagnetic field of the antenna system.
  • the RFID tag consists of an antenna structure with the aforementioned microchip. To read the information is - as is known - a so-called.
  • Reader is used, for example, the tags the necessary energy for operation through the electromagnetic field via an antenna system, the tags provided with the microchip then the stored information using this energy can send out a corresponding answer that can be read and evaluated via an antenna system and a downstream RFID reader.
  • EAS electronic article security system
  • an antenna device for example a UHF RFID antenna device, in order to set up a goods identification system therefor. This could be used to read out certain information about goods and products passing through the surveillance area, which are important for various processes.
  • an antenna system is basically known, which can be installed in a passageway (doorway).
  • different antenna systems can be used, namely for example an RFID antenna system consisting of patch antennas.
  • so-called loop antennas or a so-called photonic band GAP antenna can be used.
  • the antennas described may, in addition to a passageway on an adjacent wall pointing in the front direction or in an actual door frame facing in the front direction or pointing backwards or else parallel to Passage direction extending in the actual archway be arranged radiating.
  • patch antennas are used, several patch antennas can also be operated together, which are arranged one above the other in the vertical direction.
  • a plurality of such patch antennas can be used, which are arranged to run in a plurality of branches in the vertical direction and operated together, wherein in a variant described so-called diversity switches or diversity combiners can be used for this purpose.
  • this system can be used for an electronic article security system EAS and / or for a goods identification system WIS.
  • an RFID antenna system can be constructed, which comprises antennas for an electronic article security system EAS and next to antennas for a goods identification system WIS.
  • It is therefore an object of the present invention to provide an improved RFID antenna system comprising on the one hand an antenna device for an electronic article security system and on the other hand an antenna device for a goods identification system (WIS) for reading out with a microchip Includes tags.
  • WIS goods identification system
  • the present invention provides an extended RFID system for electronic article surveillance (EAS) on the one hand and for the realization of a goods identification system (WIS) on the other hand, which is characterized by its high integration capability and optimal use.
  • EAS electronic article surveillance
  • WIS goods identification system
  • the aforementioned goods identification system and the associated antenna device can also be retroactively retrofitted to an existing RFID antenna system for an electronic article surveillance system (EAS) without the function and mode of operation of this EAS system or of the goods Identification system is adversely affected by retrofitting.
  • the inventively improved system works on the basis of RFID technology.
  • the invention provides that the antenna system provided laterally by a passage area to be monitored comprises at least two antennas, these at least two antennas in the passage direction or at least with one component in the passage direction are arranged side by side. You do not necessarily have to be in the same altitude (for example, parallel to the level of the passageway), but can also be partially positioned at different altitudes. However, a line lying through the middle or center of gravity of the two adjacently arranged antenna systems straight line should have an angular deviation with respect to a horizontal plane (or a plane parallel to the passageway), which is preferably not greater than 45 °.
  • the UHF RFID system comprises patch antennas or consists of patch antennas. These have a particularly low overall height and can therefore easily be retrofitted into existing, often consisting of frame-shaped antennas EAS antenna system devices, for example, within the frame-shaped antenna of the existing EAS monitoring system.
  • the arrangement of two patch antennas which are offset from each other with lateral offset in the passage direction or with a component in the passage direction, can be realized with simple means improved bundling of the surveillance area.
  • This offers significant advantages insofar as correspondingly tagged goods or products are only detected and read out when a person with a product comprising a microchip RFID tag actually passes through the defined reading area (ie the surveillance area) and not only in passes near this reading area.
  • This ensures above all that no too early detection is triggered by the fact that, for example, a person secured to the passage secured by two laterally positioned antenna systems only in the immediate vicinity (for example, still in the Loading) and a product secured with a tag can reach the detection and / or reading area of the antenna system.
  • the patch antennas according to the invention can be designed as individual patch antennas. However, they can also be designed as combined patch antennas, which are formed, for example, on a common ground plane, on a common substrate, etc., so that only the patch areas are arranged separately on this substrate. Here are any modifications possible.
  • At least two pairs of patch antennas are arranged one above the other at each side antenna device, ie at two different levels or planes (where the paired patch antennas, as mentioned above, are not necessarily the same Height level, but at least in the specified extent offset from each other can be arranged).
  • the patch antennas may be mechanically pre-adjusted so that their main beam direction substantially not parallel to the plane of the passageway (the bottom surface), but deviating aligned with a vertically extending component are.
  • an electronic alignment and / or adjustment of the antennas in order to preset the detection and / or reading area differently, at least to a certain extent, and thereby to optimize it.
  • This can be realized, for example, by a predetermined or possibly also adjustable phase offset between two patch antennas arranged one above the other.
  • the patch antennas can operate in linear or circular polarization.
  • the circularly polarized operation of the patch antennas has advantages to the extent that it is ensured that a product tagged with RFID tags is always reliably detected and the information stored on the tag can be read out easily and completely, regardless of the orientation of the tag when passing through the reading area.
  • This RFID system preferably operates in the UHF range, for example in the 800 MHz to 1000 MHz range (in particular in the 800 MHz to 950 MHz range - for example 868 MHz range).
  • the reading range of the patch antennas can be up to 1.5 m and more (for example, up to 2 m, etc.).
  • Figure 1 a schematic representation of a surveillance area or passage, wherein in the left antenna system serving the electronic article backup Antennas and the antennas provided for the goods identification system are indicated or shown by way of example;
  • FIG. 2 shows a schematic view of the UHF antenna arrangement according to the invention for an electronic article security system (EAS) in the direction of the transit view;
  • EAS electronic article security system
  • FIG. 3 is a schematic plan view of a patch antenna pair used
  • FIG. 5 is a cross-sectional illustration of an embodiment modified from FIG. 3;
  • FIG. 6 shows an embodiment of a patch antenna pair deviating from FIGS. 3 and 4;
  • FIG. 7 shows a further modified exemplary embodiment in plan view of the patch antennas used
  • FIG. 8 shows a further detailed representation of a possible embodiment variant
  • FIG. 9 shows a simplified embodiment variant corresponding to FIG. 8.
  • FIG. 1 shows the basic schematic structure of an electronic article security system (EAS) with two mutually offset antenna devices 1, between which a passageway 3 runs along a bottom surface 5 along the passage direction 3 '.
  • EAS electronic article security system
  • the antenna devices 1 are formed in the manner of lateral boundaries I 1 , which essentially comprise a vertical or vertical extension 7 running transversely or in particular perpendicular to the bottom surface 5, a transverse or horizontal extension 9 running parallel or substantially parallel or with a component parallel to the passage 3 and a comparatively narrow designed thickness extension 11 transversely or perpendicular to the passage direction 3 'and thus in particular parallel to the bottom surface 5 have.
  • Antenna devices 1 and the side boundaries 1 is a transversely to the passage 3 and transverse and in particular perpendicular to the passage 3 'extending passage zone formed, which is to be monitored by the antenna device.
  • a conventional EAS monitoring system is generally constructed in such a way that the antenna device in a side boundary I 1 comprises, for example, one or preferably two approximately rectangular loop antennas 15, which are controlled accordingly.
  • a transmitting and / or evaluation unit 17 is preferably in Foot area 1 "of this page limit 1 is provided.
  • EAS electronic article surveillance system
  • RFID so formed electronic article surveillance system
  • Such systems typically operate in a frequency range of e.g. 10 Hz to 20 kHz (when, for example, an electromagnetic method is used or, for example, at 8 to 9 MHz (typically around 8.2 MHz) when, for example, a radio-frequency method is used).
  • a UHF RFID system is provided in the present case, which is used for goods identification.
  • additional antennas are provided in the form of patch antennas.
  • this system serves, above all, through the use of tags with microchips to capture and read out product-related information, ie information about the goods on which the relevant tag is appropriate.
  • product-related information ie information about the goods on which the relevant tag is appropriate.
  • this information can also be used, in order ultimately to build up an electronic article surveillance device (if, for example, the product-related information stored on the tag is read out and, for example, compared with information stored via a cash register system in order to query it whether or not a product bearing the date has already been paid for).
  • a first embodiment of the UHF RFID goods identification system is shown in a schematic representation.
  • a substrate 23rd In the patch antennas are antennas, which in accordance with the illustration of Figure 3 in a vertical plan view and in Figure 4 in transverse view, a substrate 23rd
  • Ground surface 27 is provided.
  • the patch surface 25 and the ground surface 27 are arranged at a distance 23 'corresponding to the thickness of the substrate 23 to each other.
  • the two patch antennas 21 are arranged parallel in front of a ground plane 31, in such a way that the lower ground plane 27 of the respective patch antenna 21 is galvanically isolated from the ground plane 31 (ie in a capacitive arrangement to) comes to rest.
  • the ground plane 31 projects beyond the patchan antennas in plan view and projects laterally over the patch antennas in all directions.
  • the ground surface 31 may consist, for example, of metal or a metal sheet or, for example, of a copper-coated printed circuit board.
  • the fact that the ground plane 27 of the patch antenna 21 is galvanically isolated from the common ground plane 31 is particularly suitable when conventional patch antennas are used which, for example, are adhered to the ground plane 31 using an adhesive (if this is not electrically conductive).
  • a patch antenna mentioned with its lower ground surface 27 could also be placed directly on the ground plane 31 to produce a direct-current or galvanic contact.
  • a passage opening 31 ' in the respective patch surface 21 belonging to the ground surface 27 a congruent passage opening 27' and through the substrate 23 continuously through a passageway 35 is formed, so that through this entire arrangement a feed line 37 extends, which is electrically galvanically connected to the overhead patch surface 25 at a feed point 25 '.
  • a capacitive coupling in the region of the feed point 25 'with the patch surface 25 is possible.
  • a feeding of the patch surface 25 is possible, for example, that the feed line 37 on the surface of the substrate 23 lying and / or running (ie plane-parallel to the plane of the patch surface) is connected to the patch surface, for example on Edge of the patch area.
  • the patch surface can also have a U-shaped recess or the like, for example, so that the feed line extending in the plane of the patch surface 25 is further inwardly offset, for example, at the end of the U-shaped recess (ie opposite the peripheral edge of the patch surface). is electrically connected to the patch surface.
  • the underlying ground surface 27 extends to the peripheral side surface 123 of the substrate 23, whereas in the plan view according to FIG.
  • the at least approximately square-shaped surface of the patch antenna 21 is provided at two diagonally opposite corners with a chamfer 41, which serves to tune the antenna.
  • Two patch antennas formed in accordance with the exemplary embodiment according to FIGS. 3 and 4 are arranged at a lateral distance 43 (ie in a clear lateral distance 43 between two side boundary surfaces 123 facing one another) two adjacent patch antennas), on a common ground plane 31.
  • the distance between the two center points of the patch antennas or the centers of gravity of the two patch antennas is designated 45.
  • This center distance 45 should be greater than or equal to 0.2 times ⁇ (lambda) with respect to the operating frequency of the patch antennas used, preferably the center wavelength of the frequency used, for example 0.2 ⁇ 34 cm -1 5 cm are.
  • the UHF RFID antenna system operates at a frequency of 868 MHz.
  • the patch antennas do not necessarily have to be the same or the same size. They also need not be arranged necessarily exactly in the horizontal offset, that is, in parallel direction to the forward direction 3 ⁇ next to one another (it being understood in the illustrated embodiment that the extending in the horizontal direction of passage 3 'direction parallel to the bottom surface 5 extends).
  • a cooperating patch antenna pair does not basically have to be formed from two overall individual patch antennas 21, but have a common structure can.
  • the patch antenna pair according to FIG. 5 has a common ground plane 27 on the underside of a common substrate 23, wherein on the top side of the substrate 23 the two mutually separate patch surfaces 25 are formed, which are fed via a separate feed line 37 at a feed point 25 'at the associated patch surfaces 25 ends.
  • the patch antenna pair thus formed is arranged at a small distance above the common ground surface 31, so that the ground surface 27 extends on the underside of the substrate in close proximity to the common ground surface 31.
  • the patch antenna pairs partially shown in the figures are arranged offset in the forward direction 3 'to each other. They do not have to be arranged exactly parallel to the passage direction 3 '. In particular, even if, for example, the passage is broadened or tapered, the lateral distance from a vertical plane lying in the passage direction 3 'to the relevant patch area 25 of a patch antenna 21 could be different.
  • the mentioned patch antenna pair represents a basic embodiment of the invention in which at least two patch antennas 21 form a first group A of cooperating patch antennas. It can be arranged offset in the passage direction or with a component in the passage direction to each other but still several patch antennas, for example, three patch antennas, etc.
  • such a cooperating pair of patch antennas 21 is not limited to Passage direction 3 1 , but also in the vertical or vertical direction 7 can be arranged with a certain offset to each other.
  • a maximum deviation in height and / or vertical direction is preferably to be carried out such that a straight line 47 laid through the middle or center of gravity of the associated pair of patch antennas leads to a horizontal plane or to a plane parallel to the passageway or to the bottom surface 5 48 includes an angle ⁇ that is less than or equal to 45 °.
  • the patch antennas shown in FIGS. 1 to 6 could also be arranged twisted relative to one another, so that in the case of a patch antenna, the feed point 25 'is more at the top and at the adjacent patch antenna at the bottom or at the one antenna rather at the right and at the other patch antenna, for example, is more on the left side, etc. Again, there are basically no restrictions.
  • a group of four of patch antennas 21 or several groups of two or more groups of four etc. can be used in an antenna device 1.
  • a second patch antenna group B is higher (in the embodiment shown in FIG Form of a higher-lying patch antenna pair B) is provided, although the higher-lying patch antenna pair B is arranged with a same vertical or vertical offset (which need not necessarily be so), but in Passage direction 3 'positioned differently from the lower patch antenna pair A.
  • each of the mentioned groups A or B or each further patch antenna group can also have more than two patch antennas, which are arranged offset in the passage direction or at least in one component in the passage direction.
  • the clearances 43 in the horizontal or passage direction 3 1 or in the vertical or vertical direction 7 can be of the order of magnitude of a few mm to a few cm (without any fundamental restriction to this size range).
  • the lower row A of patch antennas 21 relative to the upper row B of patch antennas 21 with a phase offset can be fed to each other, whereby an electric Up- tilt or, depending on the arrangement, if desired , a so-called electric down-tilt can generate.
  • the main emission direction or main lobe is thereby electrically pre-set in ascending vertical orientation or rather in lowered vertical orientation.
  • the control of the patch antennas can be carried out in such a way that the monitored area is electrically preset from the lower floor upwards.
  • a different phase control with respect to the patch antennas arranged one above the other in the different rows or planes can take place such that For example, the main lobe or the main monitoring area is not perpendicular to the ground plane 31 of the patch antennas, but is aligned with a component in the vertical direction running upward.
  • a different phase feed could be carried out, for example, in such a way that the main beam direction of the patch antennas in a certain angular range tends to extend downwards into the surveillance region is aligned in it.
  • the different phase control between the two patch antennas 21 of a group A and / or B arranged adjacent to one another approximately at the same height can take place in such a way that the alignment of the monitored area corresponds to the main beam direction (Direction of the main lobe) of the patch antenna in one or in an opposite direction with respect to the passageway 3 is deflected out of a transversely extending median symmetry plane out.
  • additional patch antennas 21 may be provided, for example, additionally in the floor area or in the ceiling area or for example at the foot area 1 "of the antenna device 1 (or also at the upper end area of the antenna device 1)
  • a plurality of patch antennas offset in the direction of passage or with a component in the passage direction are also used, at least one pair of patch antennas or, for example, three, four or more patch antennas, in particular those provided at the lower foot region or at the upper end region
  • patch antennas can also be aligned mechanically upwards or downwards, in particular if electronic beam shaping and alignment is not carried out, as explained above with reference to FIG Area of the side parts 1 'or in the bottom area or above the passageway (for example, in a ceiling or suspended from it) patch antennas used as additional patch antennas, individual patch antennas can be used here.
  • two or more patch antennas lying side by side in the passage direction or at least offset with one component in the passage direction are also used here, which thus form groups of patch antennas which interact.
  • the two side antenna devices 1, so the two side boundaries 1 ' can be arranged at a side distance 51 from each other, for example, between 0.8 m to 2.5 m, in particular can vary between 1.4 and 2.0 m (although these limits can be undershot or exceeded).
  • the height of a patch antenna or patch antenna pair i. in particular the associated ground surface 31, for example, may preferably be between 5 cm to 40 cm.
  • the distance 55 of the lower patch antenna combination 125a to the bottom surface should be at least 0.5 to 1 m.
  • the distance 57 between the lower patch antenna combination 125a and the upper patch antenna combination 125b should preferably be between 0.1 m to 2 m, in particular around 0.2 m to 1.2 m. The distance can also be arbitrarily greater when particularly high side boundaries 1 'are used and the upper antenna devices are to be particularly.
  • the distance of this patch antenna combination 125 to the bottom 5 should have a dimension of at least 0.5 m and more, the overall height of the arrangement again can be 1 to 2 m.
  • the patch antennas 21 used to enable an electronic goods identification system preferably operate in the UHF frequency range, that is to say for example in an 800 MHz to 950 MHz or 1000 MHz range (in particular in the range of 868 MHz).
  • this WIS system is used in addition to a conventional EAS monitoring system which operates without the patch antennas mentioned, it is preferred to use a conventional monitoring system, for example in the 10 Hz to 20 kHz (in particular in electromagnetic EAS methods) or for example in the 5 MHz to 10 MHz range (for example around 8, 2 MHz), in particular if it is a radio-frequency EAS method.
  • the patch antennas used in accordance with the invention are used for an RFID surveillance system, so that products, goods and / or persons etc. to be monitored can then be detected if they still carry an RFID tag, which is recognized during passage along the passageway and the corresponding information can be read out and evaluated by means of a "reader" provided for this purpose.
  • a passage gate along a passageway can also be constructed in such a way that corresponding side boundaries are arranged several times side by side at a lateral distance, for example five side boundaries I 1 , whereby four parallel passageways 3 are defined.
  • each patch antennas are installed so that they partially radiate in one and partly in the opposite direction for detecting both transmission paths.
  • the mentioned antenna devices 1 are used and monitored for monitoring a passageway so that in each case a pair of such antenna devices 1 is provided, ie in each case a corresponding antenna device 1 or a side boundary I 1 , which are arranged opposite to the passageway to be monitored.

Landscapes

  • Waveguide Aerials (AREA)
  • Variable-Direction Aerials And Aerial Arrays (AREA)
  • Burglar Alarm Systems (AREA)

Abstract

L'invention concerne un système d'antennes RFID amélioré présentant les caractéristiques suivantes : les au moins deux antennes à plaque (21) sont disposées de façon décalée l'une par rapport à l'autre dans le sens de la voie de passage (3) ou au moins avec un composant dans la direction de passage (3'), les au moins deux antennes à plaque (21) forment un groupe d'antennes à plaque (A, B) pour concentrer et ainsi resserrer la zone de surveillance dans la direction de passage (3') et les au moins deux antennes à plaque (21) sont disposées à égale distance d'une surface de base (5) de la voie de passage (3) et/ou sur le même plan horizontal ou de façon décalée de telle sorte qu'une droite passant par les centres et/ou les centres de gravité d'au moins deux antennes à plaque (21) voisines forme avec un plan horizontal et/ou un plan parallèle à la surface de base (5) un angle α inférieur ou égal à 45°.
EP08735281A 2007-04-17 2008-04-16 Système d'antennes rfid Withdrawn EP2137791A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102007018059A DE102007018059A1 (de) 2007-04-17 2007-04-17 RFID-Antennen-System
PCT/EP2008/003039 WO2008125345A1 (fr) 2007-04-17 2008-04-16 Système d'antennes rfid

Publications (1)

Publication Number Publication Date
EP2137791A1 true EP2137791A1 (fr) 2009-12-30

Family

ID=39529674

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08735281A Withdrawn EP2137791A1 (fr) 2007-04-17 2008-04-16 Système d'antennes rfid

Country Status (8)

Country Link
EP (1) EP2137791A1 (fr)
JP (1) JP2010527054A (fr)
CN (1) CN101657936A (fr)
BR (1) BRPI0810421A2 (fr)
CA (1) CA2683792A1 (fr)
DE (1) DE102007018059A1 (fr)
RU (1) RU2009142221A (fr)
WO (1) WO2008125345A1 (fr)

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CN103870858A (zh) * 2014-03-10 2014-06-18 无锡钧普科技有限公司 拆卸式传送带射频识别通道系统

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Publication number Priority date Publication date Assignee Title
CN103870858A (zh) * 2014-03-10 2014-06-18 无锡钧普科技有限公司 拆卸式传送带射频识别通道系统

Also Published As

Publication number Publication date
RU2009142221A (ru) 2011-05-27
JP2010527054A (ja) 2010-08-05
BRPI0810421A2 (pt) 2014-10-14
CA2683792A1 (fr) 2008-10-23
WO2008125345A1 (fr) 2008-10-23
CN101657936A (zh) 2010-02-24
DE102007018059A1 (de) 2008-10-23

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