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EP1287585B1 - Carrier element for an antenna with low hand sensitivity - Google Patents

Carrier element for an antenna with low hand sensitivity Download PDF

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Publication number
EP1287585B1
EP1287585B1 EP01903627A EP01903627A EP1287585B1 EP 1287585 B1 EP1287585 B1 EP 1287585B1 EP 01903627 A EP01903627 A EP 01903627A EP 01903627 A EP01903627 A EP 01903627A EP 1287585 B1 EP1287585 B1 EP 1287585B1
Authority
EP
European Patent Office
Prior art keywords
antenna
carrier element
shielding
facilities
point
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.)
Expired - Lifetime
Application number
EP01903627A
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German (de)
French (fr)
Other versions
EP1287585A1 (en
Inventor
Gérard Salzgeber
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.)
Continental Automotive Switzerland AG
Original Assignee
Siemens Transit Telematic Systems AG
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Filing date
Publication date
Application filed by Siemens Transit Telematic Systems AG filed Critical Siemens Transit Telematic Systems AG
Priority to EP01903627A priority Critical patent/EP1287585B1/en
Publication of EP1287585A1 publication Critical patent/EP1287585A1/en
Application granted granted Critical
Publication of EP1287585B1 publication Critical patent/EP1287585B1/en
Anticipated expiration legal-status Critical
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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
    • H01Q1/52—Means for reducing coupling between antennas; Means for reducing coupling between an antenna and another structure
    • H01Q1/526—Electromagnetic shields
    • 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
    • H01Q7/04—Screened antennas

Definitions

  • the antenna voltage only changes by a few percent when approached by hand.
  • the antenna factor which is defined as the quotient antenna voltage by H field, is typically 10 V m / A.
  • the shield 21 only to be attached on one side.

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Details Of Aerials (AREA)
  • Measurement Of The Respiration, Hearing Ability, Form, And Blood Characteristics Of Living Organisms (AREA)
  • Gyroscopes (AREA)

Abstract

The invention relates to a multi-layered carrier element (5) for reducing interference with antennae (11) comprising at least one coil. In addition to the layer, the antenna (11) comprises a shield (21) which is placed along at least one extension of the antenna and split at a certain point. The shield (21) is electrically connected to a reference point (3) which is located on the carrier element, and is preferably electrically connected to the ground layer. The shield (21) reduces interference such as that caused by a hand or by a nearby metallic object.

Description

Die vorliegende Erfindung betrifft ein Trägerelement tragend eine Antenne nach dem Oberbegriff des Patentanspruchs 1.The present invention relates to a carrier element an antenna according to the preamble of claim 1.

Für die Registrierung von Personen oder Gegenständen werden tragbare Empfänger eingesetzt, die meist als sogenannte Smartcards oder Chipcards ausgebildet sind, die z.B. aus US 5,844,244 (Kaba Schliesssysteme AG, Wetzikon, Schweiz) bekannt sind. Solche Cards werden oft auch als elektronische Billette bezeichnet.For the registration of people or objects portable receivers used, mostly as so-called Smart cards or chip cards are formed which e.g. out US 5,844,244 (Kaba Schliesssysteme AG, Wetzikon, Switzerland) are known. Such cards are often called electronic Inscribed tickets.

In WO 98/26370 A1 (Innovatron Industries SA, Paris) ist ein drahtloses Kommunikationssystem mit tragbaren Empfängern beschrieben, bei dem die Datenübertragung über das (magnetische) H-Feld erfolgt. Typischerweise sind Frequenzen von 6.78 MHz, 13.5 MHz oder von 27 MHz vorgesehen. Werden im Eingangsbereich einer Türe eines öffentlichen Verkehrsmittels Sender der vorstehend genannten Frequenz angeordnet, ist das ausgesendete elektromagnetische Feld im genannten Eingangsbereich als Nahfeld ausgebildet. Der Begriff Nahfeld bedeutet, dass der sogenannte H-Feld-Anteil dominiert. Der Bereich des Nahfeldes ist üblicherweise definiert mit einem Abstand r, für den die Beziehung r < 0.6 · λ gilt. λ steht dabei für die Wellenlänge. Bei einer Frequenz von z.B. 13.5 MHz beträgt λ = 22 m, so dass die Nahfeldbedingungen bis zu einer Distanz von etwa 12 m erfüllt sind.In WO 98/26370 A1 (Innovatron Industries SA, Paris) is a wireless communication system with portable receivers described in which the data transmission via the (magnetic) H field occurs. Typically, frequencies are from 6.78 MHz, 13.5 MHz or from 27 MHz provided. Are in Entrance area of a door of a public transport Transmitter of the above frequency is arranged emitted electromagnetic field in the named entrance area trained as a near field. The term near field means that the so-called H-field part dominates. The The area of the near field is usually defined with a Distance r for which the relationship r <0.6 · λ applies. λ stands doing for the wavelength. At a frequency of e.g. 13.5 MHz is λ = 22 m, so the near field conditions up to a distance of about 12 m are met.

Die Übertragung mittels Frequenzen der vorgenannten Beispiele würde grosse Antennen mit Abmessungen von mehreren Metern benötigen. In vielen Fällen ist die maximale Grösse der Antenne jedoch durch die Abmessungen eines Gerätes oder eines Trägerelementes vorgegeben. Für kontaktlose Erfassungssysteme muss die Empfangsantenne z.B. auf die Abmessungen einer Chipkarte reduziert werden. Solche Chipkarten haben üblicherweise Abmessungen von Kreditkarten, nämlich 53 x 85mm2. Eine derartig starke Reduktion der Antennengrösse führt einerseits zu sehr geringen Antennen-Empfangsspannungen und andererseits zu einer erhöhten Sensitivität der Antennenspannung auf Umgebungseinflüsse. Die geringe Empfindlichkeit lässt sich meist mittels einer geeigneten Verstärkervorstufe kompensieren. Bei Chipkarten ist jedoch zu beachten, dass die Energieaufnahme solcher Vorstufen möglichst klein sein muss. Darüber hinaus ist im Nahfeldbereich die Antennenspannung umgekehrt proportional zur dritten Potenz des Abstandes Empfangsantenne - Sendeantenne. Aus Platzgründen sind der Windungszahl solcher Antennen enge Grenzen gesetzt.The transmission using frequencies of the aforementioned examples would require large antennas with dimensions of several meters. In many cases, however, the maximum size of the antenna is determined by the dimensions of a device or a carrier element. For contactless detection systems, the receiving antenna must be reduced to the dimensions of a chip card, for example. Such chip cards usually have the dimensions of credit cards, namely 53 x 85mm 2 . Such a strong reduction in the antenna size leads on the one hand to very low antenna reception voltages and on the other hand to an increased sensitivity of the antenna voltage to environmental influences. The low sensitivity can usually be compensated for using a suitable amplifier pre-stage. With chip cards, however, it should be noted that the energy consumption of such preliminary stages must be as small as possible. In addition, the antenna voltage in the near field is inversely proportional to the third power of the distance between the receiving antenna and the transmitting antenna. For reasons of space, the number of turns of such antennas is limited.

Bei tragbaren Empfängern stellt sich darüber hinaus das Problem, dass z.B. durch die Hand eines Menschen oder durch in der Nähe befindliche elektrisch leitende Körper der Empfang gestört wird. Die Störung kann beispielsweise eine erheblich reduzierte Antennenspannung oder eine Verstimmung der Antenne zur Folge haben. Mit Verstimmung ist eine Veränderung der vorgesehenen Resonanzfrequenz bezeichnet. Da mit der übertragenen Information eine Verrechnung einer bezogenen Leistung verbunden sein kann, ist eine besonders zuverlässig Uebertragung gefordert.This also applies to portable receivers Problem that e.g. by the hand of a person or by nearby electrically conductive body of the Reception is disturbed. The disorder can be, for example significantly reduced antenna voltage or a detuning of the antenna. With an upset is a change designated the intended resonance frequency. In order to the information transmitted is offset against a related one Performance can be linked is a particularly reliable Transfer required.

In der Schrift US 5,248,989 (Murdoch, Perth, Australia) wird ein Magnetischer Feldkonzentrator vorgeschlagen, bei dem beidseitig einer Ringantenne je eine Abschirmung vorgesehen ist. Mit einer solchen Abschirmung werden durch eine Aenderung des elektrischen Feldes verursachten Störeinflüsse reduziert. Solche Störeinflüsse werden z.B. durch die Hand eines Menschen oder durch in der Nähe befindliche elektrisch leitende Körper verursacht. In US 5,248,989 (Murdoch, Perth, Australia) proposed a magnetic field concentrator in which One shield is provided on each side of a ring antenna is. With such a shield by a Change in the electrical field caused interference reduced. Such interferences are e.g. by hand of a human or by nearby electrical conductive body causes.

Der vorliegenden Erfindung liegt daher die Aufgabe zugrunde ein Trägerelement, das eine Antenne trägt, anzugeben, das unempfindlich ist auf Störeinflüsse der Umgebung.The present invention is therefore based on the object specify a carrier element that carries an antenna, the is insensitive to environmental interference.

Diese Aufgabe wird durch die im Patentanspruch 1 angegebenen Massnahmen gelöst. vorteilhafte Ausgestaltungen der Erfindung sind in weiteren Ansprüchen angegeben.This object is achieved by the specified in claim 1 Measures solved. advantageous embodiments of the invention are specified in further claims.

So können sich die folgenden Vorteile zusätzlich ergeben:

  • i ) Durch eine Segmentierung der weiteren Abschirmungen wird die Sensitivität auf Störeinflüsse weiter reduziert. Die Segmente können isoliert - in der Fachsprache "floatend" genannt - oder teilweise mit der Masse (Fachsprache: Ground) elektrisch verbunden sein.
  • ii) Die Abschirmung besticht durch die einfache Realisierbarkeit, in dem auf der tragenden Leiterplatte am Rand lediglich etwas breitere Leiterbahnen vorzusehen sind.
    • The following additional advantages can result:
  • i) The segmentation of the further shields further reduces the sensitivity to interference. The segments can be isolated - in the technical term "floating" - or partially electrically connected to the ground (technical term: ground).
  • ii) The shielding impresses with its simple feasibility, in which only slightly wider conductor tracks have to be provided on the supporting circuit board at the edge.

    • Die Erfindung wird nachfolgend anhand der Zeichnung beispielsweise näher erläutert. Dabei zeigen:

    Figur 1a
    Aufsicht auf eine Chipkarte als erfiadungsgemässes Trägerelement der Antenne;
    Figur 1b
    Schnittdarstellung des erfindungsgelnässen Trägerelementes mit optionalen zusätzlichen Abschirmungen;
    Figur 2
    Ansicht der Struktur zusätzlicher Abschirmungen.
    The invention is explained in more detail below with reference to the drawing, for example. Show:
    Figure 1a
    Supervision of a chip card as a carrier element of the antenna according to the invention;
    Figure 1b
    Sectional view of the support element according to the invention with optional additional shields;
    Figure 2
    View the structure of additional shields.

    Figur 1a zeigt als Trägerelement 5 eine Chipkarte in der Ansicht. Das Trägerelement 5 ist mehrlagig ausgeführt. Das Rechteck 3 gibt die ungefähre Ausdehnung der Lage Masse (Groundlayer) an. Die Lage Masse braucht jedoch nicht flächig ausgeführt zu sein. Auf dem Trägerelement 5 sind Bauelemente 41 und 42 in diskreter oder integrierter Ausführung andeutungsweise angegeben. Eine Rahmenantenne 11 - im folgenden nur noch Antenne genannt - ist mit sieben Windungen längs des Umfanges des Trägerelementes 5 angeordnet, die Kontaktierung erfolgt über die Anschlüsse 12. Der Uebereichtlichkeit halber sind die weiteren Verbindungen auf dem mehrlagigen Trägerelement 5 weggelassen sowie nur zwei der sieben Windungen dargestellt. In Figur 1a sind Abschirmungen 21 schraffiert dargestellt, die die Windungen der Antenne 11 oben und unten umgeben. In einer realen Aufsicht wären die Windungen der Antenne 11 jedoch unsichtbar. Die Anzahl Windungen der Antenne 11 bestimmt sich durch die Geometrie des Trägerelementes 5 sowie durch die Ausführung der für die Verstärkung der Antennenspannung benötigten Verstärkervorstufestufe. Die Antenne 11 ist in einer Ebene angeordnet. FIG. 1a shows a chip card as the carrier element 5 in the view. The carrier element 5 is designed in multiple layers. The Rectangle 3 gives the approximate extent of the layer mass (Ground layer). However, the mass layer does not need to be flat to be executed. Components are on the carrier element 5 41 and 42 in a discrete or integrated version specified. A loop antenna 11 - in the following only called antenna - is with seven turns along the The circumference of the carrier element 5 is arranged, the contact takes place via the connections 12. For the sake of convenience are the other connections on the multi-layer support element 5 omitted and only two of the seven turns shown. Shields 21 are hatched in FIG. 1a shown the turns of the antenna 11 above and below surround. In real supervision, the turns would be the Antenna 11, however, invisible. The number of turns of the Antenna 11 is determined by the geometry of the carrier element 5 as well as by running for reinforcement of the antenna voltage required preamplifier stage. The antenna 11 is arranged in one plane.

    Um den Einfluss elektrisch leitender Materialien auf die Antenne 11 abzuschwächen, sind elektrische Abschirmungen 21 vorgesehen. Oberhalb und unterhalb der Antennen-Windungen ist die je mit einem Bezugspunkt 3 verbundene Abschirmung 21 bzw. 211 und 212 , siehe dazu die Fig. 1b, angebracht, welche den direkten Einfluss der Umgebung, d.h. eine kapazitive Einkopplung auf die Wicklung verhindert. Eine solche Einkopplung wirkt als Antennenverlängerung und daraus kann eine höhere Antennenspannung resultieren. Wegen der damit verbundenen Verstimmung der Antenne 11 ist dieser Effekt unerwünscht und wird mit der Abschirmung 21 bzw. 211 und 212 behoben. Die Kopplung findet durch Anbringen der Abschirmung 21 bzw. 211 und 212 nur durch die magnetische Komponente statt, nämlich mit dem H-Feld, vgl. Vektordarstellung H in Figur la. Als Bezugspunkt 3 wird üblicherweise die Masse (Groundlayer) gewählt.In order to weaken the influence of electrically conductive materials on the antenna 11, electrical shields 21 are provided. Above and below the antenna windings, the shield 21 or 21 1 and 21 2 , which is connected to a reference point 3, is attached, see FIG. 1b, which prevents the direct influence of the environment, ie a capacitive coupling to the winding. Such coupling acts as an antenna extension and this can result in a higher antenna voltage. Because of the detuning of the antenna 11 associated with this, this effect is undesirable and is eliminated with the shield 21 or 21 1 and 21 2 . The coupling takes place by attaching the shield 21 or 21 1 and 21 2 only through the magnetic component, namely with the H field, cf. Vector representation H in Figure la. The mass (ground layer) is usually chosen as the reference point 3.

    Die Antenne 11 ist resonativ auf die Empfangsfrequenz abgestimmt, diese Abstimmung kann mit einem parallel dazugeschalteten Kondensator vorgenommen werden (in den Figuren nicht dargestellt). Ist eine grössere Bandbreite erwünscht, kann die Antenne auch aperiodisch eingekoppelt werden.The antenna 11 is resonant to the reception frequency voted, this vote can be done with a parallel connected capacitor are made (in the Figures not shown). Is a wider range If desired, the antenna can also be coupled in aperiodically become.

    Der Abstand der Abschirmungen 211 und 212 beträgt etwa 0,6 bis 1 mm. Je nach Anwendung kann der Abstand auch grösser als 1 mm betragen. Die Abschirmungen 211 und 212 müssen an einer Stelle 22 aufgetrennt werden, um einen Kreisstrom zu verhindern, welcher sonst das magnetische Feld unzulässig stark dämpfen würde. Die Auftrennung 22 ist in Fig. 1a in einer bevorzugten Ausführungsform gegenüber den Anschlüssen 12 der Antenne 11 angeordnet.The distance between the shields 21 1 and 21 2 is approximately 0.6 to 1 mm. Depending on the application, the distance can also be greater than 1 mm. The shields 21 1 and 21 2 must be separated at a point 22 in order to prevent a circulating current which would otherwise dampen the magnetic field to an unacceptably high degree. In a preferred embodiment, the separation 22 is arranged in FIG. 1 a opposite the connections 12 of the antenna 11.

    Für das Trägermaterial kann Epoxyharz FR4 verwendet werden. Die für eine Chipkarte erforderlichen weiteren Lagen wie Masse (Groundlayer), L1, L2, usw. mit den Leiterbahnen für die elektronischen Bauelemente sind in der Fig. 1b nicht dargestellt.Epoxy resin FR 4 can be used for the carrier material. The further layers required for a chip card, such as ground (ground layer), L1, L2, etc., with the conductor tracks for the electronic components are not shown in FIG. 1b.

    In einer Weiterentwicklung der Erfindung hat sich gezeigt, dass es sich als günstig erweist, zusätzlich zu den mit Masse verbundenen Abschirmungen 211 und 212 zwei weitere nicht mit Masse verbundenen, elektrisch leitenden Abschirmungen 611 und 612 anzubringen. Die Ausgestaltung der Abschirmungen 611 und 612 ist in Fig. 1b gezeigt. Mit diesen zusätzlichen Abschirmungen 611 und 612 wird das einwirkende, als E-Feld ausgebildete Potential gleichmässig auf die Abschirmungen 211 und 212 verteilt. Durch diese Massnahme kann insbesondere der Einfluss der Handempfindlichkeit noch weiter reduziert werden. Die Ausführung dieser zusätzlichen Abschirmungen 611 und 612 ist so vorzunehmen, dass diese je im Abstand von etwa 0.2mm von der Abschirmung 211 bzw. 212 angeordnet sind.In a further development of the invention, it has been shown that it has proven to be advantageous to mount two further electrically conductive shields 61 1 and 61 2 in addition to the shields 21 1 and 21 2 connected to ground. The design of the shields 61 1 and 61 2 is shown in Fig. 1b. With these additional shields 61 1 and 61 2 , the acting potential, which is designed as an E field, is evenly distributed over the shields 21 1 and 21 2 . This measure in particular can further reduce the influence of hand sensitivity. These additional shields 61 1 and 61 2 are to be designed such that they are each arranged at a distance of approximately 0.2 mm from the shield 21 1 and 21 2 .

    In Figur 2 ist eine besondere Ausführungsform der Anordnung und Auftrennung der zusätzlichen Abschirmung 61 gezeigt. Solche Abschirmungen sollten möglichst symmetrisch ausgeführt sein, beispielsweise mittels der Segmente 61I und 61II .Bei einer Aufteilung in vier Quadranten kann es je nach Anwendungsfall zweckmässig sein, punktsymmetrisch oder spiegelsymmetrisch zwei der vier Segmente mit der Lage Masse (Groundlayer) zu verbinden.FIG. 2 shows a special embodiment of the arrangement and separation of the additional shield 61. Such shields should be made as symmetrical as possible, for example by means of segments 61 I and 61 II . With a division into four quadrants, depending on the application, it may be appropriate to connect two of the four segments with the position ground (ground layer) symmetrically or mirror symmetrically.

    Besonders vorteilhaft ist es, wenn die Stellen 62, an welcher die Abschirmungen 61I und 61II aufgetrennt sind, gegenüber der Auftrennstelle 21 verschoben sind (in Fig. 2 nicht dargestellt).It is particularly advantageous if the points 62 at which the shields 61 I and 61 II are separated are shifted relative to the separation point 21 (not shown in FIG. 2).

    Alle Abschirmungen 21 und 61 bestehen aus dünner Kupferfolie bzw. sind als Leiterbahnen ausgeführt, deren Breite grösser ist als die Breite der Antennenwindungen. Die Antennenwindungen sind in diesem Ausführungsbeispiel ebenfalls als Leiterbahnen ausgeführt. All shields 21 and 61 are made of thin copper foil or are designed as conductor tracks, the width of which is greater is than the width of the antenna turns. The antenna windings are also in this embodiment as Conductor tracks executed.

    Die Antennenspannung verändert sich bei Annäherung mit der Hand nur noch um wenige Prozent. Der Antennenfaktor, der als Quotient Antennenspannung durch H-Feld definiert ist, beträgt typischerweise 10 Vm / A.The antenna voltage only changes by a few percent when approached by hand. The antenna factor, which is defined as the quotient antenna voltage by H field, is typically 10 V m / A.

    Somit kann für die Frequenz 6.78 MHz bei 1 W Sendeleistung im Abstand von ca. 1.5 m bei einem Trägerelement 5 mit sieben Antennenwindungen folgende Antennenspannung erwartet werden: 1 mV. In einem grösseren Abstand von ca. 4 m würde sich die Antennenspannung auf etwa 50 µV reduzieren.Thus for the frequency 6.78 MHz with 1 W transmission power in Distance of about 1.5 m for a support element 5 with seven The following antenna voltages are expected: 1 mV. At a greater distance of approx. 4 m the Reduce the antenna voltage to about 50 µV.

    Die Handempfindlichkeit kann abhängig von der benutzten Frequenz durch Anbringen von zusätzlichen Abschirmungslagen weiter reduziert werden.The hand sensitivity may depend on the one used Frequency by applying additional shielding layers can be further reduced.

    Die Ausführung des erfindungsgemässen Trägerelementes ist nicht auf rahmenförmige Antennen beschränkt. Je nach Einsatzgebiet der Antenne sind topologisch äquivalente Formen ebenso möglich, insbesondere kann die vorliegende Erfindung auch für Ringantennen ausgeführt sein.The execution of the support element according to the invention is not limited to frame-shaped antennas. Depending on the area of application the antenna are topologically equivalent forms as well possible, in particular the present invention can also be used for Ring antennas are designed.

    Je nach Anwendung kann es auch ausreichen, die Abschirmung 21 nur einseitig anzubringen.Depending on the application, it may also be sufficient for the shield 21 only to be attached on one side.

    BezugszeichenlisteLIST OF REFERENCE NUMBERS

    22
    Bezugspunktreference point
    33
    Rechteckrectangle
    55
    Trägerelementsupport element
    1111
    Antenneantenna
    1212
    Anschlussconnection
    2121
    Abschirmungshielding
    2222
    Auftrennung; Auftrennstelleseparation; disruption site
    6161
    zusätzliche Abschirmungadditional shielding
    6262
    Auftrennung der zusätzlichen Abschirmung; Auftrennstelle der zusätzlichen AbschirmungSeparation of the additional shielding; disruption site the additional shielding

    Claims (5)

    1. Carrier element (5) having a multi-layer construction and carrying an antenna (11) which has at least one winding and which antenna (11) is provided with a shielding facility (211, 212) on both sides implemented in each case in the form of a printed circuit track, whereby
      the shielding facilities (211, 212) and the antenna (11) are each arranged in a layer taking the form of a plane;
      the layers are essentially parallel; and
      the shielding facilities (211, 212) are each separated electrically and connected together electrically at one point (22),
      characterized in that
      the shielding facilities (211, 212) are connected to a reference point (3) and that the shielding facilities (211, 212) are surrounded in each case on the side facing away from the antenna by a further shielding facility (611, x612) arranged to run in parallel in one plane, whereby the further shielding facilities are each situated in a further layer and are electrically separated at least one point (62) in each case.
    2. Carrier element (5) according to Claim 1,
      characterized in that
      the further shielding facilities (611, 612) are divided up symmetrically into two or four segments (61I and 61II) and are electrically separated at two or four points (62).
    3. Carrier element (5) according to Claim 2,
      characterized in that
      individual but not all segments (61I and 61II) are electrically connected to ground (3) and the connected segments (61I and 61II) are arranged in point symmetry or in mirror symmetry.
    4. Carrier element (5) according to one of Claims 1 to 3,
      characterized in that
      the separating point (22) of the shielding facilities and the separating points (62) of the further shielding facilities (611, 612;611, 61II) are arranged so as to be displaced with respect to one another.
    5. Use of a carrier element (5) in accordance with Claims 1 to 4 for a chipcard.
    EP01903627A 2000-05-15 2001-01-08 Carrier element for an antenna with low hand sensitivity Expired - Lifetime EP1287585B1 (en)

    Priority Applications (1)

    Application Number Priority Date Filing Date Title
    EP01903627A EP1287585B1 (en) 2000-05-15 2001-01-08 Carrier element for an antenna with low hand sensitivity

    Applications Claiming Priority (4)

    Application Number Priority Date Filing Date Title
    EP00110358A EP1158601A1 (en) 2000-05-15 2000-05-15 Support device with an antenna with low sensitivity
    EP00110358 2000-05-15
    PCT/EP2001/000097 WO2001089034A1 (en) 2000-05-15 2001-01-08 Carrier element for an antenna with low hand sensitivity
    EP01903627A EP1287585B1 (en) 2000-05-15 2001-01-08 Carrier element for an antenna with low hand sensitivity

    Publications (2)

    Publication Number Publication Date
    EP1287585A1 EP1287585A1 (en) 2003-03-05
    EP1287585B1 true EP1287585B1 (en) 2003-12-03

    Family

    ID=8168723

    Family Applications (2)

    Application Number Title Priority Date Filing Date
    EP00110358A Withdrawn EP1158601A1 (en) 2000-05-15 2000-05-15 Support device with an antenna with low sensitivity
    EP01903627A Expired - Lifetime EP1287585B1 (en) 2000-05-15 2001-01-08 Carrier element for an antenna with low hand sensitivity

    Family Applications Before (1)

    Application Number Title Priority Date Filing Date
    EP00110358A Withdrawn EP1158601A1 (en) 2000-05-15 2000-05-15 Support device with an antenna with low sensitivity

    Country Status (5)

    Country Link
    US (1) US6637665B2 (en)
    EP (2) EP1158601A1 (en)
    AT (1) ATE255771T1 (en)
    DE (1) DE50101086D1 (en)
    WO (1) WO2001089034A1 (en)

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    US20030057288A1 (en) 2003-03-27
    WO2001089034A1 (en) 2001-11-22
    US6637665B2 (en) 2003-10-28
    EP1158601A1 (en) 2001-11-28
    EP1287585A1 (en) 2003-03-05
    DE50101086D1 (en) 2004-01-15

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