EP1496568A1 - Bobine de transpondeur pour système sans fil d'ouverture de véhicule - Google Patents

Bobine de transpondeur pour système sans fil d'ouverture de véhicule Download PDF

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Publication number
EP1496568A1
EP1496568A1 EP04103000A EP04103000A EP1496568A1 EP 1496568 A1 EP1496568 A1 EP 1496568A1 EP 04103000 A EP04103000 A EP 04103000A EP 04103000 A EP04103000 A EP 04103000A EP 1496568 A1 EP1496568 A1 EP 1496568A1
Authority
EP
European Patent Office
Prior art keywords
transponder coil
coil according
transponder
core
winding
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Withdrawn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
EP04103000A
Other languages
German (de)
English (en)
Inventor
Norbert Aue
Bernd Kopp
Jan Rossel
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.)
Kaschke KG & Co GmbH
Original Assignee
Kaschke KG & Co GmbH
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
Priority claimed from DE10338175A external-priority patent/DE10338175A1/de
Application filed by Kaschke KG & Co GmbH filed Critical Kaschke KG & Co GmbH
Publication of EP1496568A1 publication Critical patent/EP1496568A1/fr
Withdrawn legal-status Critical Current

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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
    • H01Q1/27—Adaptation for use in or on movable bodies
    • H01Q1/32—Adaptation for use in or on road or rail vehicles
    • H01Q1/3208—Adaptation for use in or on road or rail vehicles characterised by the application wherein the antenna is used
    • H01Q1/3233—Adaptation for use in or on road or rail vehicles characterised by the application wherein the antenna is used particular used as part of a sensor or in a security system, e.g. for automotive radar, navigation systems
    • H01Q1/3241—Adaptation for use in or on road or rail vehicles characterised by the application wherein the antenna is used particular used as part of a sensor or in a security system, e.g. for automotive radar, navigation systems particular used in keyless entry systems
    • 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
    • H01Q7/08—Ferrite rod or like elongated core

Definitions

  • the invention relates to a transponder coil, in particular for wireless electronic vehicle locking systems.
  • a transponder coil is together with the associated control electronics and mostly together with a button cell for power supply in Car key housed, so that the smallest possible outside dimensions in functional terms High frequency characteristics are observed.
  • the mechanical and electrical reliability meet the high demands of automotive manufacturers.
  • antenna coil in miniature design is a prismatic ferrite core placed on a plastic body, wherein the plastic body Metal contacts at the ends, preferably for surface mounting (SMD) the antenna coil, carries and in the region of the longitudinal extent of the ferrite core not wider is as this and is wrapped with this together with the coil wire (DE 199 11 803 A1 corresponds to EP 1 037 304 A2).
  • SMD surface mounting
  • This constructive design requires bonding the ferrite core with the plastic body, which is an operation that automates poorly leaves. Since the winding wire rests directly on the ferrite core in the case of Ferrites with a marked electrical conductivity, as with certain MnZn ferrites additional insulation between ferrite core and winding required.
  • the invention is based on the object, with a basically comparable outer shape but further miniaturized external dimensions, the manufacturing and reliability deficiencies to eliminate the described prior art.
  • the soft magnetic core which is preferably a ferrite core or a other core with soft magnetic properties, is on all sides of a high temperature resistant and thus reflowable plastic surrounded and thus protected (the Lay-up and ejection points in the injection mold may be excluded).
  • the Core advantageously has an elongated, prismatic shape, but it can Other forms may be provided.
  • the plastic, z. B. by introducing soft magnetic material, in particular a soft magnetic Filler have soft magnetic properties. At appropriate magnetic Properties of the core material ensures even further function of a core break, because the fragments held by the plastic sheath in an unchanged position become. The risk of breakage can be practically completely eliminated by already at The production two sections are tightly joined together.
  • the metal contacts are designed so that when thermocompression-contact (bonding) of the winding wire, the total pressure of the bonding tool via the metal contacts is derived on a base, without the plastic and the core material of a mechanical Exposure.
  • the encapsulation of the core is kept so thin that, on the one hand, the inductance properties are not affected and on the other hand, the winding wire without the at
  • the prior art required intermediate layers, for example, from the material "Parylene", is sufficiently insulated from an electrically conductive ferrite core.
  • the external dimensions of the transponder coil meet the requirements of car manufacturers, wherein the embodiment according to claim 4 preferably for a total height less than 2.5 mm and the embodiment according to claims 5 and 6 preferably is intended for a total height below 2.0 mm.
  • the winding is within the outer profile of the component, so that this particular is protected.
  • the nose of claim 7 increases the overall length a little over that by the Core usable length. However, it has manufacturing advantages, because of this nose derived by the thermo-compression welding forces derived in the winding tool become.
  • the height A of the first embodiment (Fig. 3) is 2.5 mm, the remaining dimensions are proportional to the drawing except for the thin plastic layer 10, which is 0.15 mm thick.
  • the Winding 5 consists of 2000 turns of a winding wire of 0.028 mm diameter.
  • the metal contacts 3.1 are made of nickel silver with a thickness of 0.25 mm.
  • Figs. 4 to 6 wherein the height B is 2.0 mm, the plastic layer 10 0.15 mm thick and the winding 5 of 1000 turns of a winding wire of 0.028 mm diameter.

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Security & Cryptography (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Near-Field Transmission Systems (AREA)
EP04103000A 2003-07-05 2004-06-28 Bobine de transpondeur pour système sans fil d'ouverture de véhicule Withdrawn EP1496568A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE10330507 2003-07-05
DE10330507 2003-07-05
DE10338175A DE10338175A1 (de) 2003-07-05 2003-08-20 Transponderspule, insbesondere für drahtlose elektronische Fahrzeugschließsysteme
DE10338175 2003-08-20

Publications (1)

Publication Number Publication Date
EP1496568A1 true EP1496568A1 (fr) 2005-01-12

Family

ID=33453883

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04103000A Withdrawn EP1496568A1 (fr) 2003-07-05 2004-06-28 Bobine de transpondeur pour système sans fil d'ouverture de véhicule

Country Status (1)

Country Link
EP (1) EP1496568A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004023815A1 (de) * 2004-05-13 2005-12-08 Vacuumschmelze Gmbh & Co. Kg Antennenanordnung und Verwendung der Antennenanordnung

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19607092A1 (de) * 1996-02-24 1997-08-28 Kaschke Kg Gmbh & Co Antennenspule für Fahrbereitschaftssysteme
WO1998040766A1 (fr) * 1997-03-11 1998-09-17 Fyrtech Microelectronics Ab Procede de fabrication d'un transpondeur et transpondeur fabrique selon ledit procede
EP1037304A2 (fr) * 1999-03-17 2000-09-20 Kaschke KG GmbH & Co. Bobine d'antenne miniaturisée notamment pour systèmes de fermeture électronique de véhicule
DE10143708A1 (de) * 2001-08-31 2003-04-03 Kaschke Kg Gmbh & Co Miniatur-Induktivität mit einem prismatischen, auf einen Kunststoffkörper aufgesetzten Ferritkern

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19607092A1 (de) * 1996-02-24 1997-08-28 Kaschke Kg Gmbh & Co Antennenspule für Fahrbereitschaftssysteme
WO1998040766A1 (fr) * 1997-03-11 1998-09-17 Fyrtech Microelectronics Ab Procede de fabrication d'un transpondeur et transpondeur fabrique selon ledit procede
EP1037304A2 (fr) * 1999-03-17 2000-09-20 Kaschke KG GmbH & Co. Bobine d'antenne miniaturisée notamment pour systèmes de fermeture électronique de véhicule
DE10143708A1 (de) * 2001-08-31 2003-04-03 Kaschke Kg Gmbh & Co Miniatur-Induktivität mit einem prismatischen, auf einen Kunststoffkörper aufgesetzten Ferritkern

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004023815A1 (de) * 2004-05-13 2005-12-08 Vacuumschmelze Gmbh & Co. Kg Antennenanordnung und Verwendung der Antennenanordnung
US7545337B2 (en) 2004-05-13 2009-06-09 Vacuumscmelze Gmbh & Co. Kg Antenna arrangement for inductive power transmission and use of the antenna arrangement

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