EP2756547B1 - Antenne d'identification à radiofréquence - Google Patents

Antenne d'identification à radiofréquence Download PDF

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Publication number
EP2756547B1
EP2756547B1 EP12766295.5A EP12766295A EP2756547B1 EP 2756547 B1 EP2756547 B1 EP 2756547B1 EP 12766295 A EP12766295 A EP 12766295A EP 2756547 B1 EP2756547 B1 EP 2756547B1
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EP
European Patent Office
Prior art keywords
antenna
magnetic sheet
track
electrically conductive
conductive
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.)
Active
Application number
EP12766295.5A
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German (de)
English (en)
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EP2756547A1 (fr
Inventor
Christophe Mathieu
Yean Wei Yeap
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.)
Linxens Holding SAS
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Linxens Holding SAS
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Publication of EP2756547A1 publication Critical patent/EP2756547A1/fr
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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
    • H01Q1/2225—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 active tags, i.e. provided with its own power source or in passive tags, i.e. deriving power from RF signal
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
    • H01Q1/38—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith formed by a conductive layer on an insulating support
    • 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
    • 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
    • H01Q7/06—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 with core of ferromagnetic material

Definitions

  • a tag having an RFID antenna to identify and monitor objects is well known in the art.
  • a tag comprises for instance an antenna circuit formed with conductive tracks which is electrically connected to an integrated circuit (IC) chip that includes a memory. It uses electromagnetic field produced by an RFID reader. If such a tag enters the magnetic field for a sufficient time, the RFID antenna will become energized and the electronic circuit can transmit a signal towards the reader or a separate receiving antenna.
  • IC integrated circuit
  • Such a mode for contactless communication between an IC tag and a reader/writer is expected to become more diversified in the future.
  • portable communication terminals such as mobile phones will be equipped with a tag function and a reader/writer function.
  • the resonance frequency of the antenna is shifted with respect to the nominal resonance frequency. This shifting of resonance frequency affects the information exchange between the transponder and the reader/writer device and even results in no communication at all (de-tuning of the whole RFID system).
  • the antenna also has to meet space consumption requirement, in particular the antenna should have a thickness as thin as possible and should be as easy as possible to manufacture and is compatible with mass production specification. Thickness issue is particularly important when the antenna is intended to be cased in a mobile phone, especially new generation of slim smart phones, where space is quite limited.
  • Fig.1 show a first embodiment of a planar RFID antenna which comprises a supporting substrate 2 on which an electrically conductive track 4 has been formed.
  • the substrate 2 is, in the context of the invention, made of a magnetic flexible sheet which comprises magnetic particles (such as a powder or a flake of magnetic ferrite) dispersed in a resin binder.
  • An example of such a ferrite sheet is Liqualloy (TM) Flexible Film sold by Alps Electric Co., LTD.
  • TM Liqualloy
  • Such type of ferrite sheets are also easily available by ferrite material suppliers, such as for example Japanese ferrite material suppliers.
  • Fig. 3 which is a cross-sectional view in a line A-A of Fig. 2 , one may observe that the copper ferrite laminate is provided with two blind holes, located at the level of the two antenna connection ends. These blind holes provide an easy access for electrically connecting the antenna to a device.
  • the antenna connection ends may be mechanically embossed for getting a reliable electrical connection with the device.
  • the applicant has then succeeded in obtaining antennas of thickness ranging between 150 to 200pm with a layered structure as schematically drawn in Fig. 4 .
  • a second sheet of magnetic material is placed on a second surface of the above described composite magnetic sheet, i.e. on an opposite surface of the first magnetic sheet to the surface onto which the conductive track is formed or to be formed.
  • Such a second magnetic sheet can be made of a composite material including magnetic particles and a synthetic resin, a sintered type of magnetic material or can be a plain ferrite sheet.
  • the layered structure usually comprises:

Claims (7)

  1. Procédé de fabrication d'une antenne comprenant les étapes suivantes :
    • fourniture d'une feuille magnétique constituée d'un matériau composite comportant des particules magnétiques et une résine synthétique, ladite feuille magnétique ayant une première surface ;
    • formation d'une piste d'antenne électriquement conductrice (4) directement sur la première surface de la feuille magnétique, qui sert de substrat de support (2), la piste d'antenne électriquement conductrice (4) ayant au moins un tour, caractérisé en ce qu'il est réalisé par un procédé de rouleau à rouleau et qu'il comprend en outre les étapes suivantes :
    • application d'une couche adhésive sur une première surface de la feuille magnétique, avant la formation de la piste d'antenne électriquement conductrice (4) ; et
    • perforation de deux trous débouchants dans la feuille magnétique et la couche adhésive, avant la formation de la piste d'antenne électriquement conductrice (4) directement sur la première surface de la feuille magnétique, de manière à former, une fois que la piste d'antenne électriquement conductrice (4) est formée, deux trous borgnes situés au niveau de deux extrémités de raccordement d'antenne et fournissant un accès pour le raccordement électrique de l'antenne à un dispositif.
  2. Procédé selon la revendication 1, dans lequel l'épaisseur de la structure stratifiée comprenant la feuille magnétique (2), la couche adhésive et la piste conductrice (4) de l'antenne a une épaisseur comprise entre 150 et 200 µm.
  3. Procédé selon la revendication 2, dans lequel la couche adhésive fait 20 µm d'épaisseur.
  4. Procédé selon une quelconque revendication précédente, dans lequel l'étape de formation de la piste conductrice d'antenne (4) comporte les étapes suivantes :
    • application d'un motif de masquage sur la couche électriquement conductrice pour protéger sélectivement la couche conductrice ;
    • gravure chimique de la couche électriquement conductrice de manière à retirer la couche conductrice non protégée ; et
    • retrait du motif de masquage pour exposer la piste conductrice (4).
  5. Procédé selon la revendication 4, comprenant en outre une étape de placage ou de passivation de la piste conductrice exposée (4).
  6. Procédé selon l'une quelconque des revendications précédentes, comprenant l'étape de mise en place d'une deuxième feuille magnétique sur une deuxième surface de ladite feuille magnétique constituée d'un matériau composite comportant des particules magnétiques et une résine synthétique, ladite deuxième surface étant à l'opposé de ladite première surface, ladite feuille magnétique constituée d'un matériau composite comportant des particules magnétiques et une résine synthétique ayant une perméabilité avec une valeur de partie imaginaire µ" qui est inférieure à 5 H/m et ladite deuxième feuille magnétique ayant une perméabilité avec une partie réelle µ' qui est supérieure à 100 H/m.
  7. Antenne obtenue par un procédé selon l'une quelconque des revendications précédentes.
EP12766295.5A 2011-09-14 2012-09-11 Antenne d'identification à radiofréquence Active EP2756547B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
MYPI2011004370A MY166125A (en) 2011-09-14 2011-09-14 Rfid antenna
PCT/EP2012/067718 WO2013037762A1 (fr) 2011-09-14 2012-09-11 Antenne d'identification à radiofréquence

Publications (2)

Publication Number Publication Date
EP2756547A1 EP2756547A1 (fr) 2014-07-23
EP2756547B1 true EP2756547B1 (fr) 2023-02-22

Family

ID=46939696

Family Applications (1)

Application Number Title Priority Date Filing Date
EP12766295.5A Active EP2756547B1 (fr) 2011-09-14 2012-09-11 Antenne d'identification à radiofréquence

Country Status (6)

Country Link
EP (1) EP2756547B1 (fr)
JP (2) JP6095070B2 (fr)
KR (1) KR20140060358A (fr)
CN (2) CN108695595A (fr)
MY (1) MY166125A (fr)
WO (1) WO2013037762A1 (fr)

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CN103746181B (zh) * 2013-12-31 2017-06-13 瑞声科技(沭阳)有限公司 Nfc天线及其制作方法
CN105098365B (zh) * 2014-05-14 2018-08-10 3M创新有限公司 近场通信模块
CN105633583A (zh) * 2014-10-28 2016-06-01 林小群 一种近场通信模块及其制作方法
DE102015009319A1 (de) * 2015-07-17 2017-01-19 Saurer Germany Gmbh & Co. Kg Transportsystem für Spinnkopse und Verfahren zum Betreiben des Transportsystems
CN106650889A (zh) * 2016-11-22 2017-05-10 武汉大学 一种集成磁复合膜的近场通信标签及其制备方法
JP7344003B2 (ja) * 2018-04-24 2023-09-13 京セラ株式会社 Ｒｆｉｄタグおよびｒｆｉｄシステム
JP7190694B2 (ja) 2018-12-06 2022-12-16 株式会社マルアイ Ｒｆｉｄの導電性パターンの製造方法

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EP2302567A1 (fr) * 2009-09-17 2011-03-30 Nxp B.V. Dispositif de transpondeur RFID à tolérance de surface

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EP2001078A1 (fr) * 2007-05-25 2008-12-10 Laird Technologies AB Dispositif d'antenne et dispositif de communication radio portable comportant un tel dispositif d'antenne
EP2302567A1 (fr) * 2009-09-17 2011-03-30 Nxp B.V. Dispositif de transpondeur RFID à tolérance de surface

Also Published As

Publication number Publication date
KR20140060358A (ko) 2014-05-19
CN108695595A (zh) 2018-10-23
JP2014527375A (ja) 2014-10-09
WO2013037762A1 (fr) 2013-03-21
EP2756547A1 (fr) 2014-07-23
JP6095070B2 (ja) 2017-03-15
MY166125A (en) 2018-05-24
CN103947040A (zh) 2014-07-23
JP6126188B2 (ja) 2017-05-10
JP2016034151A (ja) 2016-03-10

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