EP1158601A1 - Support device with an antenna with low sensitivity - Google Patents

Support device with an antenna with low sensitivity Download PDF

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Publication number
EP1158601A1
EP1158601A1 EP00110358A EP00110358A EP1158601A1 EP 1158601 A1 EP1158601 A1 EP 1158601A1 EP 00110358 A EP00110358 A EP 00110358A EP 00110358 A EP00110358 A EP 00110358A EP 1158601 A1 EP1158601 A1 EP 1158601A1
Authority
EP
European Patent Office
Prior art keywords
antenna
shield
carrier element
shields
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.)
Withdrawn
Application number
EP00110358A
Other languages
German (de)
French (fr)
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
Haeni Prolectron AG
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 Haeni Prolectron AG filed Critical Haeni Prolectron AG
Priority to EP00110358A priority Critical patent/EP1158601A1/en
Priority to PCT/EP2001/000097 priority patent/WO2001089034A1/en
Priority to EP01903627A priority patent/EP1287585B1/en
Priority to AT01903627T priority patent/ATE255771T1/en
Priority to DE50101086T priority patent/DE50101086D1/en
Publication of EP1158601A1 publication Critical patent/EP1158601A1/en
Priority to US10/292,764 priority patent/US6637665B2/en
Withdrawn legal-status Critical Current

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    • 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 present invention relates to a carrier element for a Antenna according to the preamble of claim 1.
  • Smart cards or chip cards are formed which e.g. out U.S. 5,844,244 are known. Such cards are often called referred to as electronic tickets.
  • WO 98/26370 describes a wireless communication system portable receivers described in which the data transmission via the (magnetic) H field.
  • frequencies of 6.78 MHz, 13.5 MHz or 27 MHz are provided.
  • the term near field means that the so-called H-field component dominates.
  • the area of the near field is usually defined with a distance r for which the relationship r ⁇ 0.6 ⁇ ⁇ applies. ⁇ stands for the wavelength.
  • ⁇ 22 m, so that the near field conditions up to a distance of about 12 m are fulfilled.
  • the transmission using frequencies of the above examples would require large antennas with dimensions of several meters.
  • the maximum size of the antenna is determined by the dimensions of a device or a carrier element.
  • the receiving antenna must be reduced to the dimensions of a chip card, for example.
  • chip cards usually have 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.
  • the energy consumption of such preliminary stages must be as small as possible.
  • the antenna voltage in the near field is inversely proportional to the third power of the distance between receiving antenna and transmitting antenna. For reasons of space, the number of turns of such antennas is limited.
  • the disorder can be, for example significantly reduced antenna voltage or a detuning the antenna. With an upset is a change designated the intended resonance frequency.
  • Performance can be linked is a particularly reliable Transfer required.
  • the present invention is therefore based on the object specify a support element for an antenna that is insensitive is due to interference from the environment.
  • FIG. 1a shows a chip card as 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 contacting takes place via the connections 12. For the sake of clarity 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.
  • 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.
  • the antenna 11 is arranged in one plane.
  • electrical shields 21 are provided above and below the antenna windings. 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 1a. The mass (ground layer) is usually chosen as the reference point 3.
  • the antenna 11 is resonant to the reception frequency voted, this vote can be done with a parallel connected capacitor (in the Figures not shown). Is a wider range If desired, the antenna can also be coupled in aperiodically become.
  • 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.
  • the separation 22 in FIG. 1 a is arranged opposite the connections 12 of the antenna 11.
  • Epoxy resin FR4 can be used for the carrier material.
  • the other layers required for a chip card such as Ground (ground layer), L1, L2, etc. with the conductor tracks for the electronic components are not in FIG. 1b shown.
  • 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 useful to connect two of the four segments with the position ground (ground layer) in a point-symmetrical or mirror-symmetrical manner.
  • 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.
  • 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 Vm / A.
  • the hand sensitivity may depend on the one used Frequency by applying additional shielding layers can be further reduced.
  • the execution of the support element according to the invention is not limited to frame-shaped antennas.
  • the antenna are topologically equivalent forms as well possible, in particular the present invention can also be used for Ring antennas are designed.
  • the shield 21 may also be sufficient for the shield 21 to be attached only 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 für eine Antenne nach dem Oberbegriff des Patentanspruchs 1.The present invention relates to a carrier element for a 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 U.S. 5.844.244 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 U.S. 5,844,244 are known. Such cards are often called referred to as electronic tickets.

In WO 98/26370 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.WO 98/26370 describes a wireless communication system portable receivers described in which the data transmission via the (magnetic) H field. Typically frequencies of 6.78 MHz, 13.5 MHz or 27 MHz are provided. Be in the entrance area of a public door Means of transport transmitter of the aforementioned frequency arranged, the emitted electromagnetic field is in the mentioned entrance area designed as a near field. The The term near field means that the so-called H-field component dominates. The area of the near field is usually defined with a distance r for which the relationship r <0.6 · λ applies. λ stands for the wavelength. At a frequency of e.g. 13.5 MHz is λ = 22 m, so that the near field conditions up to a distance of about 12 m are fulfilled.

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 above 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 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 receiving antenna and 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 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.

Der vorliegenden Erfindung liegt daher die Aufgabe zugrunde ein Trägerelement für eine Antenne anzugeben, die unempfindlich ist auf Störeinflüsse der Umgebung.The present invention is therefore based on the object specify a support element for an antenna that is insensitive is due to interference from the environment.

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) Die Abschirmung besticht durch die einfache Realisierbarkeit, in dem auf der tragenden Leiterplatte am Rand lediglich etwas breitere Leiterbahnen vorzusehen sind (Patentanspruch 5).
  • ii) Eine weitere Verbesserung der Schirmwirkung ergibt sich mit in zusätzlichen Ebenen angeordneten Abschirmungen (Patentanspruch 6).
  • iii) 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 (Patentanspruch 8).
    • The following additional advantages can result:
  • i) The shielding impresses with its simple feasibility, in which only somewhat wider conductor tracks are to be provided on the supporting printed circuit board at the edge (claim 5).
  • ii) A further improvement of the shielding effect results with shields arranged in additional levels (claim 6).
  • iii) The segmentation of the further shields further reduces the sensitivity to interference. The segments can be insulated - called "floating" in technical terminology - or partially electrically connected to the ground (technical terminology: ground) (claim 8).

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

    Figur 1a
    Aufsicht auf eine Chipkarte als erfindungsgemässes Trägerelement der Antenne;
    Figur 1b
    Schnittdarstellung des erfindungsgemässen 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. Show:
    Figure 1a
    Top view of a chip card as the 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 Uebersichtlichkeit 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 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 contacting takes place via the connections 12. For the sake of clarity 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. 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 1a. 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 1a. 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 (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 in FIG. 1 a is arranged 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 FR4 can be used for the carrier material. The other layers required for a chip card such as Ground (ground layer), L1, L2, etc. with the conductor tracks for the electronic components are not in FIG. 1b shown.

    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 which are 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, 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 must 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 useful to connect two of the four segments with the position ground (ground layer) in a point-symmetrical or mirror-symmetrical manner.

    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 Antennen-windungen 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 Vm / 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 µ V 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 to be attached only on one side.

    Claims (8)

    Trägerelement (5), insbesondere Chipkarte, für eine Antenne (11), die wenigstens eine Windung aufweist, dadurch gekennzeichnet, dass eine zumindest teilweise Abschirmung (21) der mindestens einen Windung vorgesehen ist.Carrier element (5), in particular chip card, for an antenna (11) which has at least one turn, characterized in that an at least partial shield (21) of the at least one turn is provided. Trägerelement (5) nach Anspruch 1, dadurch gekennzeichnet, dass die wenigstens eine Windung im wesentlichen in einer Ebene verlaufend angeordnet ist und die Abschirmung (21) zumindest einseitig, vorzugsweise beidseitig, im wesentlichen parallel zur Ebene entlang der Windung verlaufend angeordnet ist.Carrier element (5) according to claim 1, characterized in that the at least one turn is arranged running essentially in one plane and the shield (21) is arranged running at least on one side, preferably on both sides, essentially parallel to the plane along the turn. Trägerelement (5) nach Anspruch 2, dadurch gekennzeichnet, dass die Abschirmung (21) an wenigstens einer Stelle (22) elektrisch aufgetrennt ist und elektrisch mit einem Bezugspunkt (3), vorzugsweise mit Masse, verbunden ist.Carrier element (5) according to claim 2, characterized in that the shield (21) is electrically separated at at least one point (22) and is electrically connected to a reference point (3), preferably to ground. Trägerelement (5) nach Anspruch 3, gekennzeichnet durch einen mehrlagigen Aufbau, wobei die Antenne (11), die Abschirmung (21, 211, 212) und der Bezugspunkt (3) in jeweils einer Lage angeordnet sind.Carrier element (5) according to claim 3, characterized by a multilayer structure, the antenna (11), the shield (21, 21 1 , 21 2 ) and the reference point (3) each being arranged in one layer. Trägerelement (5) nach Anspruch 4, dadurch gekennzeichnet, dass die Abschirmung (21, 211, 212) innerhalb einer Lage nach Art einer Leiterbahn ausgeführt ist.Carrier element (5) according to claim 4, characterized in that the shield (21, 21 1 , 21 2 ) is designed within a layer in the manner of a conductor track. Trägerelement (5) nach Anspruch 5, dadurch gekennzeichnet, dass beidseitig der Abschirmung (211, 212) je eine weitere Abschirmung (611, 612) vorgesehen ist, die je an wenigstens einer Stelle (62) elektrisch aufgetrennt ist.Support element (5) according to claim 5, characterized in that a further shield (61 1 , 61 2 ) is provided on both sides of the shield (21 1 , 21 2 ), which is each electrically separated at at least one point (62). Trägerelement (5) nach Anspruch 6, dadurch gekennzeichnet, dass die weitere Abschirmung (611, 612) symmetrisch in zwei oder vier Segmente (61I, 61II) gegliedert und an zwei oder vier Stellen (62) elektrisch aufgetrennt ist. Carrier element (5) according to claim 6, characterized in that the further shielding (61 1 , 61 2 ) is symmetrically divided into two or four segments (61 I , 61 II ) and electrically separated at two or four locations (62). Trägerelement (5) nach Anspruch 7, dadurch gekennzeichnet, dass einzelne aber nicht alle Segmente (61I, 61II) elektrisch mit Masse (3) verbunden sind und die verbundenen Segmente (61I, 61II) punktsymmetrisch oder spiegelsymmetrisch angeordnet sind.Carrier element (5) according to claim 7, characterized in that individual but not all segments (61 I , 61 II ) are electrically connected to ground (3) and the connected segments (61 I , 61 II ) are arranged point-symmetrically or mirror-symmetrically.
    EP00110358A 2000-05-15 2000-05-15 Support device with an antenna with low sensitivity Withdrawn EP1158601A1 (en)

    Priority Applications (6)

    Application Number Priority Date Filing Date Title
    EP00110358A EP1158601A1 (en) 2000-05-15 2000-05-15 Support device with an antenna with low sensitivity
    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
    AT01903627T ATE255771T1 (en) 2000-05-15 2001-01-08 SUPPORT ELEMENT FOR AN ANTENNA WITH LOW HAND SENSITIVITY
    DE50101086T DE50101086D1 (en) 2000-05-15 2001-01-08 CARRIER ELEMENT WITH A LOW HAND SENSITIVITY
    US10/292,764 US6637665B2 (en) 2000-05-15 2002-11-13 Carrier element for an antenna

    Applications Claiming Priority (1)

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

    Publications (1)

    Publication Number Publication Date
    EP1158601A1 true EP1158601A1 (en) 2001-11-28

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    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 After (1)

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

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

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    US10867235B2 (en) 2011-08-08 2020-12-15 Féinics Amatech Teoranta Metallized smartcard constructions and methods
    WO2013110625A1 (en) * 2012-01-23 2013-08-01 Féinics Amatech Teoranta Offsetting shielding and enhancing coupling in metallized smart cards
    US10824931B2 (en) 2012-08-30 2020-11-03 Féinics Amatech Teoranta Contactless smartcards with multiple coupling frames
    US10977542B2 (en) 2013-01-18 2021-04-13 Amtech Group Limited Industrial Estate Smart cards with metal layer(s) and methods of manufacture
    US10599972B2 (en) 2013-01-18 2020-03-24 Féinics Amatech Teoranta Smartcard constructions and methods
    US10518518B2 (en) 2013-01-18 2019-12-31 Féinics Amatech Teoranta Smart cards with metal layer(s) and methods of manufacture
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    US11341389B2 (en) 2013-01-18 2022-05-24 Amatech Group Limited Manufacturing metal inlays for dual interface metal cards
    US11354560B2 (en) 2013-01-18 2022-06-07 Amatech Group Limited Smartcards with multiple coupling frames
    US11354558B2 (en) 2013-01-18 2022-06-07 Amatech Group Limited Contactless smartcards with coupling frames
    US11551051B2 (en) 2013-01-18 2023-01-10 Amatech Group Limiied Coupling frames for smartcards with various module opening shapes
    US11568195B2 (en) 2013-01-18 2023-01-31 Amatech Group Limited Smart cards with metal layer(s) and methods of manufacture
    US11836565B2 (en) 2013-01-18 2023-12-05 Amatech Group Limited Smartcards with multiple coupling frames
    US11928537B2 (en) 2013-01-18 2024-03-12 Amatech Group Limited Manufacturing metal inlays for dual interface metal cards
    US10733494B2 (en) 2014-08-10 2020-08-04 Féinics Amatech Teoranta Contactless metal card constructions
    US10552722B2 (en) 2014-08-10 2020-02-04 Féinics Amatech Teoranta Smartcard with coupling frame antenna

    Also Published As

    Publication number Publication date
    EP1287585B1 (en) 2003-12-03
    US20030057288A1 (en) 2003-03-27
    EP1287585A1 (en) 2003-03-05
    US6637665B2 (en) 2003-10-28
    ATE255771T1 (en) 2003-12-15
    WO2001089034A1 (en) 2001-11-22
    DE50101086D1 (en) 2004-01-15

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