EP0677887A1 - Eingebauter Chip-Transponder mit Antenne - Google Patents

Eingebauter Chip-Transponder mit Antenne Download PDF

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Publication number
EP0677887A1
EP0677887A1 EP94201013A EP94201013A EP0677887A1 EP 0677887 A1 EP0677887 A1 EP 0677887A1 EP 94201013 A EP94201013 A EP 94201013A EP 94201013 A EP94201013 A EP 94201013A EP 0677887 A1 EP0677887 A1 EP 0677887A1
Authority
EP
European Patent Office
Prior art keywords
potcore
antenna circuit
surface side
circuit according
transponder
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Withdrawn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
EP94201013A
Other languages
English (en)
French (fr)
Inventor
Kurt Orthmann
Andreas Hagl
Thomas Borsanyi
Loek D'hondt
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.)
Texas Instruments Inc
Original Assignee
Texas Instruments Inc
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 Texas Instruments Inc filed Critical Texas Instruments Inc
Priority to EP94201013A priority Critical patent/EP0677887A1/de
Publication of EP0677887A1 publication Critical patent/EP0677887A1/de
Withdrawn legal-status Critical Current

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Classifications

    • 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

  • the invention relates to an antenna circuit to be used in conjunction with a chip transponder to be built-in in a thick-walled surface, which antenna circuit is insertable into a depression in the surface destined for the chip transponder en serves both for the reception and emission respectively of interrogative signals for - and response signals from - the transponder, and in which the antenna circuit is formed by potcore means which have a radiation field extending in a direction away from the surface.
  • potcore means which have a radiation field extending in a direction away from the surface.
  • transponder chip and associated antenna circuit it is known in this practice to attach such a transponder chip and associated antenna circuit to an object that is to be identified.
  • the said antenna circuit or antenna element is often of a high ⁇ material.
  • the chip transponder and associated antenna circuit which are then both built-in in a thick-walled surface, are little prone to damage from the outside and, despite their embedding in metal have an effective field of radiation while retaining a good quality factor and sufficient selective reading distance.
  • Such a chip transponder and associated antenna circuit can have, a selective distance of 20 through 30 cm.
  • the invention aims to obviate above mentioned problem and to provide a chip transponder with associated antenna or tank circuit of which the frequency is not detuned by the ferro-metallic surroundings.
  • a further advantage in this implementation is obtained because the shielding of non-ferro metal also offers mechanical robustness through which a possible plastic housing is not required anymore.
  • a further advantage is that the chip transponder and potcore antenna circuit can be mounted directly into a metal surface without the efficiency being aggravated.
  • FIG. 1a a transverse section view schematically is given of a built-in chip transponder and an associated antenna or tank circuit consisting of an open half potcore operating as antenna and a winding package in the cilindrical slot operating as antenna.
  • the thick-walled surface is indicated with 1
  • the chip transponder built-in in the depression of the surface with 2
  • the half potcore of e.g. ferrite with 3
  • the winding package with 4 The half potcore in this case consists of a bush implemented with bottom and hollow core, which bush at its upper side is open.
  • the chip transponder is also inserted in the shielding jacket and is connected to the antenna or tank circuit in a non-indicated manner.
  • the possible detuning of the transponder antenna circuit brought about by the jacket 5 can surprisingly be compensated through correction of the initial inductivity of the antenna circuit.
  • This can be arranged such that when the antenna circuit is mechanically mounted in the shielding jacket the transponder frequency is corrected to the usual frequency of 134,2 kHz.
  • the shielding attends to it that the quality factor upon mounting in a metal thick-walled surface as a whole is not reduced.
  • edge of the cylindrical wall of the shielding jacket 5 is aligned with the surface and the upper side of the potcore antenna remains open bringing about a somewhat lower quality factor.
  • FIG 2a a transverse section view is indicated again of an antenna circuit associated with a built-in chip transponder 2, which antenna circuit is similar to the one in figure 1.
  • the shielding jacket 5 again is arranged around the cylindrical potcore such that the edge of the jacket 5 is flush with the upper surface of the wall 1.
  • the dimensions of shielding jacket and potcore in this implementation are such that some room is maintained for a separate covering disc 6 of ferrite which is aligned with the said surface side.
  • a closed magnetic circuit is obtained with high quality factor.
  • FIG 2b a front view is given in which the covering disc 6 is provided with a central hole in order to obtain a proper radiating or scattering field of the antenna.
  • Figure 2c a variant is given in which the covering disc 6 is provided with a slot extending on both sides of the center.
  • the radiation field of the antenna is somewhat larger relative to the embodiment of Figure 2b while still maintaining a stable high quality factor. It is also possible to provide the covering disc with a second slot rectangular to the first slot.
  • the antenna circuit can be implemented in an other manner, e.g. coupled with a resonator circuit on a half or whole potcore.
  • the antenna circuit is connected by means of one or more secondary windings to the windings of the potcore resonator.
EP94201013A 1994-04-13 1994-04-13 Eingebauter Chip-Transponder mit Antenne Withdrawn EP0677887A1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP94201013A EP0677887A1 (de) 1994-04-13 1994-04-13 Eingebauter Chip-Transponder mit Antenne

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP94201013A EP0677887A1 (de) 1994-04-13 1994-04-13 Eingebauter Chip-Transponder mit Antenne

Publications (1)

Publication Number Publication Date
EP0677887A1 true EP0677887A1 (de) 1995-10-18

Family

ID=8216799

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94201013A Withdrawn EP0677887A1 (de) 1994-04-13 1994-04-13 Eingebauter Chip-Transponder mit Antenne

Country Status (1)

Country Link
EP (1) EP0677887A1 (de)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0782214A1 (de) * 1995-12-22 1997-07-02 Texas Instruments France Ringantennen für Resonanzschaltkreise
EP1114389A1 (de) * 1998-07-20 2001-07-11 Integrated Silicon Design Pty. Ltd Metallabgeschirmtes elektronisches auszeichnungssystem
EP1693924A1 (de) * 2003-12-12 2006-08-23 Citizen Watch Co., Ltd. Antennenstruktur und funkwellenkorrekturtakt
DE102010006010A1 (de) 2010-01-27 2011-09-29 Atmel Automotive Gmbh IC-Gehäuse
EP2771845B1 (de) * 2012-09-10 2019-01-02 Avery Dennison Corporation Verfahren zur verhinderung der unbefugten diversion von nahfeldkommunikationsetiketten
US10970496B2 (en) 2012-11-19 2021-04-06 Avery Dennison Retail Information Services, Llc NFC tags with proximity detection
US10977969B2 (en) 2010-01-29 2021-04-13 Avery Dennison Retail Information Services, Llc RFID/NFC panel and/or array used in smart signage applications and method of using
US10977965B2 (en) 2010-01-29 2021-04-13 Avery Dennison Retail Information Services, Llc Smart sign box using electronic interactions
US11126803B2 (en) 2012-10-18 2021-09-21 Avery Dennison Corporation Method, system and apparatus for NFC security

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60116111A (ja) * 1983-11-29 1985-06-22 Matsushita Electric Ind Co Ltd 同調装置
DE3527442A1 (de) * 1985-07-31 1987-02-12 Pepperl & Fuchs Verfahren und vorrichtung zur (gamma)nderung des guetefaktors einer spule
EP0496611A1 (de) * 1991-01-23 1992-07-29 Texas Instruments Holland B.V. Antennensystem für eine Abfragestation zur Identifizierung von Gegenständen
EP0549832A1 (de) * 1991-12-30 1993-07-07 Texas Instruments Incorporated Eingebauter Chip-Transponder mit Antennenspule
EP0590589A1 (de) * 1992-09-28 1994-04-06 Texas Instruments Incorporated Transponderantenne mit Schirm

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60116111A (ja) * 1983-11-29 1985-06-22 Matsushita Electric Ind Co Ltd 同調装置
DE3527442A1 (de) * 1985-07-31 1987-02-12 Pepperl & Fuchs Verfahren und vorrichtung zur (gamma)nderung des guetefaktors einer spule
EP0496611A1 (de) * 1991-01-23 1992-07-29 Texas Instruments Holland B.V. Antennensystem für eine Abfragestation zur Identifizierung von Gegenständen
EP0549832A1 (de) * 1991-12-30 1993-07-07 Texas Instruments Incorporated Eingebauter Chip-Transponder mit Antennenspule
EP0590589A1 (de) * 1992-09-28 1994-04-06 Texas Instruments Incorporated Transponderantenne mit Schirm

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 9, no. 270 (E - 353)<1993> 26 October 1985 (1985-10-26) *

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0782214A1 (de) * 1995-12-22 1997-07-02 Texas Instruments France Ringantennen für Resonanzschaltkreise
US5864323A (en) * 1995-12-22 1999-01-26 Texas Instruments Incorporated Ring antennas for resonant circuits
EP1114389A1 (de) * 1998-07-20 2001-07-11 Integrated Silicon Design Pty. Ltd Metallabgeschirmtes elektronisches auszeichnungssystem
EP1114389A4 (de) * 1998-07-20 2004-06-16 Gemplus Tag Australia Pty Ltd Metallabgeschirmtes elektronisches auszeichnungssystem
EP1693924A1 (de) * 2003-12-12 2006-08-23 Citizen Watch Co., Ltd. Antennenstruktur und funkwellenkorrekturtakt
EP1693924A4 (de) * 2003-12-12 2008-08-13 Citizen Holdings Co Ltd Antennenstruktur und funkwellenkorrekturtakt
US7522117B2 (en) 2003-12-12 2009-04-21 Citizen Holdings Co., Ltd. Antenna structure and radio-controlled timepiece
CN1894826B (zh) * 2003-12-12 2011-07-27 西铁城控股株式会社 天线结构和无线电控制计时器
DE102010006010A1 (de) 2010-01-27 2011-09-29 Atmel Automotive Gmbh IC-Gehäuse
DE102010006010B4 (de) * 2010-01-27 2014-08-14 Atmel Corp. IC-Gehäuse
US10977969B2 (en) 2010-01-29 2021-04-13 Avery Dennison Retail Information Services, Llc RFID/NFC panel and/or array used in smart signage applications and method of using
US10977965B2 (en) 2010-01-29 2021-04-13 Avery Dennison Retail Information Services, Llc Smart sign box using electronic interactions
EP2771845B1 (de) * 2012-09-10 2019-01-02 Avery Dennison Corporation Verfahren zur verhinderung der unbefugten diversion von nahfeldkommunikationsetiketten
US10282572B2 (en) 2012-09-10 2019-05-07 Avery Dennison Retail Information Services, Llc Method for preventing unauthorized diversion of NFC tags
US11126803B2 (en) 2012-10-18 2021-09-21 Avery Dennison Corporation Method, system and apparatus for NFC security
US10970496B2 (en) 2012-11-19 2021-04-06 Avery Dennison Retail Information Services, Llc NFC tags with proximity detection

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