EP0677887A1 - Transpondeur monopuce incorporé avec antenne - Google Patents
Transpondeur monopuce incorporé avec antenne Download PDFInfo
- 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- Withdrawn
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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.
Landscapes
- Waveguide Aerials (AREA)
- Details Of Aerials (AREA)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP94201013A EP0677887A1 (fr) | 1994-04-13 | 1994-04-13 | Transpondeur monopuce incorporé avec antenne |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP94201013A EP0677887A1 (fr) | 1994-04-13 | 1994-04-13 | Transpondeur monopuce incorporé avec antenne |
Publications (1)
Publication Number | Publication Date |
---|---|
EP0677887A1 true EP0677887A1 (fr) | 1995-10-18 |
Family
ID=8216799
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP94201013A Withdrawn EP0677887A1 (fr) | 1994-04-13 | 1994-04-13 | Transpondeur monopuce incorporé avec antenne |
Country Status (1)
Country | Link |
---|---|
EP (1) | EP0677887A1 (fr) |
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0782214A1 (fr) * | 1995-12-22 | 1997-07-02 | Texas Instruments France | Antenne de type anneau pour circuits résonnants |
EP1114389A1 (fr) * | 1998-07-20 | 2001-07-11 | Integrated Silicon Design Pty. Ltd | Systeme de marquage a blindage metallique |
EP1693924A1 (fr) * | 2003-12-12 | 2006-08-23 | Citizen Watch Co., Ltd. | Structure d'antenne et horloge de correction d'ondes radio |
DE102010006010A1 (de) | 2010-01-27 | 2011-09-29 | Atmel Automotive Gmbh | IC-Gehäuse |
EP2771845B1 (fr) * | 2012-09-10 | 2019-01-02 | Avery Dennison Corporation | Procédé de prévention de détournement non autorisé d'étiquettes nfc |
US10970496B2 (en) | 2012-11-19 | 2021-04-06 | Avery Dennison Retail Information Services, Llc | NFC tags with proximity detection |
US10977965B2 (en) | 2010-01-29 | 2021-04-13 | Avery Dennison Retail Information Services, Llc | Smart sign box using electronic interactions |
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 |
US11126803B2 (en) | 2012-10-18 | 2021-09-21 | Avery Dennison Corporation | Method, system and apparatus for NFC security |
Citations (5)
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 (fr) * | 1991-01-23 | 1992-07-29 | Texas Instruments Holland B.V. | Système d'antenne pour un poste d'interrogation d'identification d'objets |
EP0549832A1 (fr) * | 1991-12-30 | 1993-07-07 | Texas Instruments Incorporated | Transpondeur monopuce incorporé avec bobine-antenne |
EP0590589A1 (fr) * | 1992-09-28 | 1994-04-06 | Texas Instruments Incorporated | Antenne pour transpondeur muni d'un écran de blindage |
-
1994
- 1994-04-13 EP EP94201013A patent/EP0677887A1/fr not_active Withdrawn
Patent Citations (5)
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 (fr) * | 1991-01-23 | 1992-07-29 | Texas Instruments Holland B.V. | Système d'antenne pour un poste d'interrogation d'identification d'objets |
EP0549832A1 (fr) * | 1991-12-30 | 1993-07-07 | Texas Instruments Incorporated | Transpondeur monopuce incorporé avec bobine-antenne |
EP0590589A1 (fr) * | 1992-09-28 | 1994-04-06 | Texas Instruments Incorporated | Antenne pour transpondeur muni d'un écran de blindage |
Non-Patent Citations (1)
Title |
---|
PATENT ABSTRACTS OF JAPAN vol. 9, no. 270 (E - 353)<1993> 26 October 1985 (1985-10-26) * |
Cited By (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0782214A1 (fr) * | 1995-12-22 | 1997-07-02 | Texas Instruments France | Antenne de type anneau pour circuits résonnants |
US5864323A (en) * | 1995-12-22 | 1999-01-26 | Texas Instruments Incorporated | Ring antennas for resonant circuits |
EP1114389A1 (fr) * | 1998-07-20 | 2001-07-11 | Integrated Silicon Design Pty. Ltd | Systeme de marquage a blindage metallique |
EP1114389A4 (fr) * | 1998-07-20 | 2004-06-16 | Gemplus Tag Australia Pty Ltd | Systeme de marquage a blindage metallique |
EP1693924A1 (fr) * | 2003-12-12 | 2006-08-23 | Citizen Watch Co., Ltd. | Structure d'antenne et horloge de correction d'ondes radio |
EP1693924A4 (fr) * | 2003-12-12 | 2008-08-13 | Citizen Holdings Co Ltd | Structure d'antenne et horloge de correction d'ondes radio |
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 |
US10977965B2 (en) | 2010-01-29 | 2021-04-13 | Avery Dennison Retail Information Services, Llc | Smart sign box using electronic interactions |
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 |
EP2771845B1 (fr) * | 2012-09-10 | 2019-01-02 | Avery Dennison Corporation | Procédé de prévention de détournement non autorisé d'étiquettes nfc |
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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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): DE FR GB IT NL |
|
RBV | Designated contracting states (corrected) |
Designated state(s): DE FR GB IT NL |
|
17P | Request for examination filed |
Effective date: 19960416 |
|
17Q | First examination report despatched |
Effective date: 19981124 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
|
18D | Application deemed to be withdrawn |
Effective date: 19990605 |