EP1037304A2 - Bobine d'antenne miniaturisée notamment pour systèmes de fermeture électronique de véhicule - Google Patents

Bobine d'antenne miniaturisée notamment pour systèmes de fermeture électronique de véhicule Download PDF

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Publication number
EP1037304A2
EP1037304A2 EP00102739A EP00102739A EP1037304A2 EP 1037304 A2 EP1037304 A2 EP 1037304A2 EP 00102739 A EP00102739 A EP 00102739A EP 00102739 A EP00102739 A EP 00102739A EP 1037304 A2 EP1037304 A2 EP 1037304A2
Authority
EP
European Patent Office
Prior art keywords
antenna coil
plastic body
ferrite core
winding
core
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.)
Granted
Application number
EP00102739A
Other languages
German (de)
English (en)
Other versions
EP1037304B1 (fr
EP1037304A3 (fr
Inventor
Norbert Aue
Karl-J. Franke
Ralf Ullrich
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
Application filed by Kaschke KG & Co GmbH filed Critical Kaschke KG & Co GmbH
Publication of EP1037304A2 publication Critical patent/EP1037304A2/fr
Publication of EP1037304A3 publication Critical patent/EP1037304A3/fr
Application granted granted Critical
Publication of EP1037304B1 publication Critical patent/EP1037304B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • H01Q7/08—Ferrite rod or like elongated core
    • 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

Definitions

  • the invention relates to a miniature antenna coil, in particular for wireless electronic vehicle locking systems.
  • Such an antenna coil is housed in the vehicle key together with the associated control electronics and must therefore be very small in the outer dimensions, whereby the trend towards further miniaturization continues.
  • the reliability properties must meet the high requirements of automotive engineering.
  • a rod core choke with a ferrite core has great miniaturization potential, at the ends of square caps, preferably made of metal, attached and are wound with the continuation of the winding on the ferrite core.
  • the winding the caps are tinned and at the same time form the SMD contact (DE 195 20 858 A1).
  • the tight transition between the winding with HF function is disadvantageous here and those with a contact function, which is why here because of a possible spreading of the tin solder beyond the caps with a strong one Variance of the electrical characteristic values must be expected.
  • the invention is therefore based on the object of an antenna coil with further To create miniaturization potential and at the same time high reliability, in which also the other disadvantages of the prior art mentioned be avoided.
  • the solution according to the invention is characterized by a high RF sensitivity and good directional characteristics. It is compact, very shock and impact resistant for direct soldering on both flexible and non-flexible circuit boards suitable.
  • the construction of the antenna coil is suitable for machine manufacturing.
  • the antenna coil according to the invention showed due to its overall construction an unexpected strength for the miniature ferrite part used.
  • Figures 1 and 2 show an actually executed antenna coil according to the invention in about 10x magnification, while the sectional views Figures 3 and 4 are enlarged about 20 times.
  • a plastic body 1 for example from an LCP Vectra E130 ", carries a ferrite core 2 made of manganese-zinc ferrite. As can be seen from FIG. 2, this plastic body 1 in the central region, which carries the winding 3 indicated in half in FIG. 1, is not wider than the ferrite core 2 remains hidden from it, which, in addition to the absence of a trough-shaped embedding known from the prior art, particularly contributes to saving space and thus to the possibility of miniaturization. At the ends of the ferrite core 2, the plastic body 1 is widened in the area 4 and encompasses it Ferrite core 2 laterally and forms a winding space 6 together with the metal strips 5, which extends up to the support on a printed circuit board 7.
  • the winding 3 shown only partially in FIG. 1 comprises, for example, 333 Turns of a 0.071 mm enamelled copper wire, which, for example, Test frequency of 125 kHz at 50 mV, an inductance of 1.056 mH and a Quality Q better than 30 over a temperature range of - 40 ° C to + 85 ° C.
  • the cross section of the ferrite core 2 is T-shaped (FIG. 3), the vertical leg 8 of the T ", for example by means of silicone adhesive, is glued into a corresponding pocket of the plastic body 1, which contributes quite considerably to the resistance mentioned in the drop test due to the simultaneous form and material connection.
  • the leg 8 has a slightly trapezoidal shape
  • the ferrite core 2 rests with the underside of its leg 8 on the plastic body 1, while its other surfaces facing the plastic body 1 have such dimensional tolerances that there may be a gap which then differs from the Silicone adhesive is filled.
  • the contacting of the antenna coil by means of the invention is essential of a metal strip 5, which widened around the in a Unifangsrille 9 ( Figure 4) End 4 of the plastic body 1 inserted and preferably by pressing is attached to a V-shaped recess 10 of this circumferential groove 9.
  • the wire ends 11 ( Figure 1) of the winding 3 are by thermal compression with the metal strip 5 connected.
  • the contacting of the antenna coil on the circuit board 7 is done by soft soldering. This contacting is also firm and reliable because the wire of the winding 3 runs only a minimal distance, where in the event of a load damaging accelerations could affect it.

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Security & Cryptography (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Coils Or Transformers For Communication (AREA)
  • Support Of Aerials (AREA)
  • Details Of Aerials (AREA)
EP00102739A 1999-03-17 2000-02-10 Bobine d'antenne miniaturisée pour systèmes de fermeture électronique de véhicule Expired - Lifetime EP1037304B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19911803 1999-03-17
DE19911803A DE19911803A1 (de) 1999-03-17 1999-03-17 Antennenspule in Miniaturausführung, insbesondere für elektronische Fahrzeug-Schließsysteme

Publications (3)

Publication Number Publication Date
EP1037304A2 true EP1037304A2 (fr) 2000-09-20
EP1037304A3 EP1037304A3 (fr) 2001-11-07
EP1037304B1 EP1037304B1 (fr) 2003-08-20

Family

ID=7901238

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00102739A Expired - Lifetime EP1037304B1 (fr) 1999-03-17 2000-02-10 Bobine d'antenne miniaturisée pour systèmes de fermeture électronique de véhicule

Country Status (3)

Country Link
EP (1) EP1037304B1 (fr)
DE (2) DE19911803A1 (fr)
ES (1) ES2206093T3 (fr)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002095873A2 (fr) * 2001-05-23 2002-11-28 Neosid Pemetzrieder Gmbh & Co. Kg Antenne ferrite
EP1496568A1 (fr) * 2003-07-05 2005-01-12 Kaschke KG GmbH & Co. Bobine de transpondeur pour système sans fil d'ouverture de véhicule
DE10143708B4 (de) * 2001-08-31 2005-04-07 Kaschke Kg (Gmbh & Co.) Miniatur-Induktivität mit einem prismatischen, auf einen Kunststoffkörper aufgesetzten Ferritkern
WO2005052963A2 (fr) * 2003-11-21 2005-06-09 Neosid Pemetzrieder Gmbh & Co. Kg Composant miniature inductif conçu pour un montage smd
US6960912B2 (en) 2003-05-12 2005-11-01 Vacuumschmelze Gmbh & Co. Kg Magnetic field sensor device
EP1727163A1 (fr) * 2004-02-18 2006-11-29 Sumida Corporation Bobine, et antenne et transformateur utilisant la bobine
EP1898494A2 (fr) * 2006-09-08 2008-03-12 Vacuumschmelze GmbH & Co. KG Procédé de fabrication d'un arrangement d'aimant ayant un noyau magnétique plat et un tel arrangement d'aimant
US7639109B2 (en) 2003-03-07 2009-12-29 Coilcraft, Incorporated Sensor coil and method of manufacturing same

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19547091A1 (de) * 1995-12-16 1997-06-19 Kaschke Kg Gmbh & Co Antennenspule mit oberflächenmontierbarem Gehäuse und Verfahren zu deren Herstellung
DE19607092A1 (de) * 1996-02-24 1997-08-28 Kaschke Kg Gmbh & Co Antennenspule für Fahrbereitschaftssysteme

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19547091A1 (de) * 1995-12-16 1997-06-19 Kaschke Kg Gmbh & Co Antennenspule mit oberflächenmontierbarem Gehäuse und Verfahren zu deren Herstellung
DE19607092A1 (de) * 1996-02-24 1997-08-28 Kaschke Kg Gmbh & Co Antennenspule für Fahrbereitschaftssysteme

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002095873A2 (fr) * 2001-05-23 2002-11-28 Neosid Pemetzrieder Gmbh & Co. Kg Antenne ferrite
WO2002095873A3 (fr) * 2001-05-23 2003-02-06 Pemetzrieder Neosid Antenne ferrite
DE10143708B4 (de) * 2001-08-31 2005-04-07 Kaschke Kg (Gmbh & Co.) Miniatur-Induktivität mit einem prismatischen, auf einen Kunststoffkörper aufgesetzten Ferritkern
US7639109B2 (en) 2003-03-07 2009-12-29 Coilcraft, Incorporated Sensor coil and method of manufacturing same
US6960912B2 (en) 2003-05-12 2005-11-01 Vacuumschmelze Gmbh & Co. Kg Magnetic field sensor device
EP1496568A1 (fr) * 2003-07-05 2005-01-12 Kaschke KG GmbH & Co. Bobine de transpondeur pour système sans fil d'ouverture de véhicule
WO2005052963A2 (fr) * 2003-11-21 2005-06-09 Neosid Pemetzrieder Gmbh & Co. Kg Composant miniature inductif conçu pour un montage smd
WO2005052963A3 (fr) * 2003-11-21 2005-07-21 Pemetzrieder Neosid Composant miniature inductif conçu pour un montage smd
EP1727163A1 (fr) * 2004-02-18 2006-11-29 Sumida Corporation Bobine, et antenne et transformateur utilisant la bobine
EP1727163A4 (fr) * 2004-02-18 2010-12-29 Sumida Corp Bobine, et antenne et transformateur utilisant la bobine
EP1898494A2 (fr) * 2006-09-08 2008-03-12 Vacuumschmelze GmbH & Co. KG Procédé de fabrication d'un arrangement d'aimant ayant un noyau magnétique plat et un tel arrangement d'aimant
EP1898494A3 (fr) * 2006-09-08 2011-12-28 Vacuumschmelze GmbH & Co. KG Procédé de fabrication d'un arrangement d'aimant ayant un noyau magnétique plat et un tel arrangement d'aimant

Also Published As

Publication number Publication date
DE19911803A1 (de) 2000-09-21
EP1037304B1 (fr) 2003-08-20
DE50003327D1 (de) 2003-09-25
EP1037304A3 (fr) 2001-11-07
ES2206093T3 (es) 2004-05-16

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