NL9100176A - Antenna with transformer for non-contact transfer of information from the integrated circuit card. - Google Patents

Antenna with transformer for non-contact transfer of information from the integrated circuit card. Download PDF

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Publication number
NL9100176A
NL9100176A NL9100176A NL9100176A NL9100176A NL 9100176 A NL9100176 A NL 9100176A NL 9100176 A NL9100176 A NL 9100176A NL 9100176 A NL9100176 A NL 9100176A NL 9100176 A NL9100176 A NL 9100176A
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Netherlands
Prior art keywords
antenna
transformer
coil
antenna configuration
card
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Application number
NL9100176A
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Dutch (nl)
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Nedap Nv
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Priority to NL9100176A priority Critical patent/NL9100176A/en
Priority to NL9100176 priority
Publication of NL9100176A publication Critical patent/NL9100176A/en

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Classifications

    • GPHYSICS
    • G06COMPUTING; CALCULATING; COUNTING
    • G06KRECOGNITION OF DATA; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K19/00Record carriers for use with machines and with at least a part designed to carry digital markings
    • G06K19/06Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code
    • G06K19/067Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components
    • G06K19/07Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components with integrated circuit chips
    • G06K19/077Constructional details, e.g. mounting of circuits in the carrier
    • G06K19/07749Constructional details, e.g. mounting of circuits in the carrier the record carrier being capable of non-contact communication, e.g. constructional details of the antenna of a non-contact smart card
    • G06K19/07758Constructional details, e.g. mounting of circuits in the carrier the record carrier being capable of non-contact communication, e.g. constructional details of the antenna of a non-contact smart card arrangements for adhering the record carrier to further objects or living beings, functioning as an identification tag
    • GPHYSICS
    • G06COMPUTING; CALCULATING; COUNTING
    • G06KRECOGNITION OF DATA; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K19/00Record carriers for use with machines and with at least a part designed to carry digital markings
    • G06K19/06Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code
    • G06K19/067Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components
    • G06K19/07Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components with integrated circuit chips
    • G06K19/077Constructional details, e.g. mounting of circuits in the carrier
    • G06K19/07749Constructional details, e.g. mounting of circuits in the carrier the record carrier being capable of non-contact communication, e.g. constructional details of the antenna of a non-contact smart card
    • GPHYSICS
    • G06COMPUTING; CALCULATING; COUNTING
    • G06KRECOGNITION OF DATA; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K19/00Record carriers for use with machines and with at least a part designed to carry digital markings
    • G06K19/06Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code
    • G06K19/067Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components
    • G06K19/07Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components with integrated circuit chips
    • G06K19/077Constructional details, e.g. mounting of circuits in the carrier
    • G06K19/07749Constructional details, e.g. mounting of circuits in the carrier the record carrier being capable of non-contact communication, e.g. constructional details of the antenna of a non-contact smart card
    • G06K19/0775Constructional details, e.g. mounting of circuits in the carrier the record carrier being capable of non-contact communication, e.g. constructional details of the antenna of a non-contact smart card arrangements for connecting the integrated circuit to the antenna
    • G06K19/07756Constructional details, e.g. mounting of circuits in the carrier the record carrier being capable of non-contact communication, e.g. constructional details of the antenna of a non-contact smart card arrangements for connecting the integrated circuit to the antenna the connection being non-galvanic, e.g. capacitive
    • GPHYSICS
    • G06COMPUTING; CALCULATING; COUNTING
    • G06KRECOGNITION OF DATA; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K19/00Record carriers for use with machines and with at least a part designed to carry digital markings
    • G06K19/06Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code
    • G06K19/067Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components
    • G06K19/07Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components with integrated circuit chips
    • G06K19/077Constructional details, e.g. mounting of circuits in the carrier
    • G06K19/07749Constructional details, e.g. mounting of circuits in the carrier the record carrier being capable of non-contact communication, e.g. constructional details of the antenna of a non-contact smart card
    • G06K19/07773Antenna details
    • G06K19/07777Antenna details the antenna being of the inductive type
    • G06K19/07779Antenna details the antenna being of the inductive type the inductive antenna being a coil
    • G06K19/07781Antenna details the antenna being of the inductive type the inductive antenna being a coil the coil being fabricated in a winding process

Abstract

The integrated circuit (9) mounted in the card (1) has two terminals (7,8) connected to a capacitor (6) in parallel with the primary winding (5) on a very thin flat transformer core (4) and made of a - layer of ferromagnetic material. The priamry winding and capacitor form a tuned circuit which determines the operating frequency of the inductive link between the card and a card reading machine. A one or two turn secondary winding (3) is connected to a flat conductive loop (2) which forms an antenna as it runs around the perimeter of the card.

Description

UITTREKSEL EXTRACT

De uitvinding betreft een antenneconfiguratie voor contactloze electro-nische identificatielabels of -passen, zoals bijvoorbeeld de contactloze identificatie-kaart of IC-kaart met afmetingen en mechanische eigenschappen overeenkomstig de norm ISO-7816. The invention relates to an antenna configuration for non-contact electro-nical identification labels or as passes, such as, for example, the contactless IC card or IC card having dimensions and mechanical properties in accordance with the standard ISO-7816.

De antenneconfiguratie is opgebouw uit een antennespoel, een transformator en een condensator. The antenna configuration is built up of an antenna coil, a transformer and a capacitor. Deze configuratie heeft de eigenschap, dat zij zich electrisch gedraagt als een afgestemde kring die is opgebouwd uit een antennespoel met een groot aantal windingen en een parallel geschakelde condensator, maar door toepassing van een transformator wordt het aantal windingen van de antennespoel sterk gereduceerd zodat het geheel buigzaam geconstrueerd en uitgevoerd kan worden. This configuration has the feature that they are electrically behaves as a tuned circuit which is composed of an antenna coil with a large number of turns, and a parallel-connected capacitor, but the number of turns of the antenna coil is strongly reduced by the use of a transformer so that the whole can be flexibly constructed and executed. De antennespoel is verbonden met de primaire spoel van de transformator en de condensator met de secundaire spoel van de transformator. The antenna coil is connected to the primary coil of the transformer and the capacitor having the secondary coil of the transformer. De secundaire spoel van de transformator is uit een veel groter aantal windingen dan de primaire spoel samengesteld, waardoor de spanning die in een wisselend electromagnetisch veld over de antennespoel ontstaat, een veel hogere spanning over de condensator tot gevolg heeft. The secondary coil of the transformer is out of a much larger number of turns than the primary coil composed, so that the voltage which is produced across the antenna coil in an alternating electromagnetic field, resulting in a much higher voltage across the capacitor. Met deze laatste spanning kunnen de actieve componenten van de electronische schakeling in het label worden gevoed. With this latter voltage can be supplied to the active components of the electronic circuit in the tag. De antenneconfiguratie dient ook om de dataoverdracht tussen een zend/ontvanger en het label te verzorgen. The antenna configuration is also used to arrange the data transmission between a transmitter / receiver and the label. De kern van de transformator is buigzaam uit te voeren, door deze bijvoorbeeld uit één of meer lamellen van buigzaam amorf metaal met een hoge magnetische permeabiliteit samen te stellen. The core of the transformer is flexible to be carried out, by constructing this example, from one or more slats of flexible amorphous metal having a high magnetic permeability. De antenneconfiguratie is in dat geval ook in een buigzame behuizing te integreren. The antenna configuration is in that case also be integrated into a flexible casing.

Antenne met transformator voor contactloze informatieoverdracht vanuit Integrated Circuit-kaart. Antenna with transformer for non-contact transfer of information from the integrated circuit card.

De uitvinding betreft een antenne met transformator, geïntegreerd in een contactloze identificatie- of IC-kaart, bijvoorbeeld volgens de norm ISO-7816, maar die ook in andersoortige behuizingen, zoals een identificatiepolsband, kan worden toegepast. The invention relates to an antenna with a transformer, integrated in a non-contact IC card identification or, for example, according to the standard ISO-7816, but which is also in other types of enclosures, such as an identification wristband, can be used. Integrated Circuit (IC) kaarten, zoals bijvoorbeeld toegepast als kaart voor financiële transacties of als identificatie-pas, moeten volgens de norm ISO-7816 voldoen aan bepaalde eisen ten aanzien van afmetingen, flexibiliteit en duurzaamheid. Integrated Circuit (IC) cards, such as, for example, used as a card for financial transactions or for identification-pass, must be according to the standard ISO-7816 to meet certain requirements in respect of size, flexibility and durability. Deze eisen zullen ook gaan gelden voor de contactloze uitvoering van deze kaarten. These requirements will also apply to the non-contact version of these cards. De normen hiervoor zijn momenteel in voorbereiding. The standards for this are currently in preparation. Om informatieoverdracht met behulp van passen die zonder batterij functioneren, op relatief grote afstand (> 50 cm) mogelijk te maken, moet het energiegebruik van de electro-nische schakeling in de kaart niet alleen zeer laag zijn, maar worden er ook hoge eisen gesteld aan de antenne in de kaart. For information transfer using adapt that function without a battery, at a relatively great distance (> 50 cm) as possible, the power consumption of the electro-tronic circuit must be in the card not only are very low, but there are also high demands on the antenna in the card. De antenne in een dergelijke kaart is veelal een afgestemde kring die is opgebouwd uit een antennespoel met een groot aantal windingen en een parallel geschakelde condensator. The antenna in such a card is often a tuned circuit which is composed of an antenna coil with a large number of turns, and a capacitor connected in parallel. Deze antenne dient niet alleen om informatie met de zend/ontvanger uit te wisselen, maar ook om energie uit het zendveld om te zetten naar de energie die nodig is om de electronische schakeling in de kaart te laten functioneren. This antenna not only serves to exchange information with the transmitter / receiver, but also to extract energy from the transmission field to convert it to the energy required to operate the electronic circuit in the card. Het streven is de informatieoverdracht tussen de kaart en de zend/ont-vanger over een zo groot mogelijke afstand plaats te laten vinden. The aim is the transfer of information between the card and the transmit / de-catcher over the greatest possible distance to take place. Deze afstand wordt voor een belangrijk deel bepaald door de hoogte van de spanning die door de antenne in het zendveld wordt opgewekt. This distance is largely determined by the height of the voltage which is generated by the antenna in the transmission field. De spanning die op de antenne, oftewel over de spoel in het zendveld ontstaat, is evenredig met het aantal windingen, het oppervlak dat door de spoel wordt omsloten en de kwaliteitsfactor van de kring. The voltage applied to the antenna, which is produced across the coil in the transmit field, is proportional to the number of turns, the surface that is enclosed by the coil and the quality factor of the circuit. Om de informatie-overdracht over een zo groot mogelijke af- stand mogelijk te maken, moet de spoel zo dicht mogelijk langs de rand in de kaart worden aangebracht en voor een overdrachtsfrequentie van ca. 120 kHz, uit meer dan 100 windingen bestaan. In order to make possible the transmission of information over an as large as possible AF mode, the coil must be placed as close as possible into the card along the edge and for a transmission frequency of about 120 kHz, consist of more than 100 turns. Deze over-drachtsfrequentie wordt begrensd door wettelijk toegelaten zendener-gie-niveau's. This over-transfer frequency is limited by the legally allowed transmit ener-gy-levels. Het grote aantal windingen, de positionering langs de rand en het feit dat relatief dik draad voor de spoel moet worden gebruikt om een afstemkring met een voldoende hoge kwaliteitsfactor te verkrijgen, hebben tot gevolg, dat de spoel uit een groot aantal lagen moet zijn opgebouwd. The large number of turns, along the edge positioning, and the fact that relatively thick wire for the coil must be used in order to obtain a tuning circuit having a sufficiently high quality factor, have the effect, that the flushing of a large number of layers must be built up.

Het integreren van een spoel met voornoemde eigenschappen in een kaart die qua afmetingen en mechanische eigenschappen aan de norm ISO-7816 voldoet, levert een groot aantal problemen op. The integration of a coil having the aforementioned properties in a card that conforms to the standard ISO-7816 in terms of dimensions and mechanical properties, results in a large number of problems. De geringe dikte van de kaart heeft tot gevolg dat concessies moeten worden gedaan aan de dikte van de draad waaruit de spoel is gewikkeld. The small thickness of the card has the result that concessions have to be made to the thickness of the wire from which the coil is wound. Een dunnere draad heeft een hogere electrische weerstand, hetgeen de kwaliteitsfactor van de kring verlaagt, hetgeen weer ten koste gaat van de afstand waarover informatieoverdracht mogelijk is. A thinner wire has a higher electrical resistance, which lowers the quality factor of the circuit, which in turn affects the distance over which information transmission is possible. Bij het buigen van de kaart kruipen de windingen van de antennespoel over elkaar, waardoor de kaart na het wegnemen van de buigkracht, zijn oorspronkelijke vorm niet meer terug krijgt. When bending the map crawl the turns of the antenna coil on each other, making the card after removal of the bending force, no longer regains its original shape. Ook is de kans groot dat de draad van de spoel breekt bij het buigen van de kaart. Also, the probability is great that the wire of the coil breaking upon bending of the card. Een kaart waarin een spoel met een groot aantal windingen is geïntegreerd, wordt te stijf en voldoet daardoor niet meer aan de gestelde eisen. A map in which a coil with a large number of turns is integrated, will be too stiff and therefore no longer meets the set requirements. Het probleem van het integreren van een antennespoel met een groot aantal windingen in een buigzame behuizing doet zich ook voor bij andere soorten contactloze electronische labels, zoals bijvoorbeeld een identificatiepolsband. The problem with the integration of an antenna coil with a large number of turns into a flexible casing also occurs with other types of contactless electronic labels, such as, for example, an identification wristband. Een identificatie-polsband is een identificatielabel dat door middel van een elastische band om de pols wordt gedragen en waarbij de antenno(spoel) in de elastische band is geïntegreerd. An identification wristband is an identification tag which is worn on the wrist, by means of an elastic band, and wherein the antenno (coil) is integrated in the elastic band. Een antennespoel die uit een groot aantal windingen is samengesteld, zal het elastische karakter van de polsband teniet doen. An antenna coil is composed of a large number of turns, the elastic nature of the wristband will negate.

De uitvinding poogt de genoemde bezwaren op te heffen. The invention seeks to eliminate the above-mentioned drawbacks.

In het navolgende wordt de uitvinding aan de hand van figuren beschreven. In the following, the invention is described with reference to FIGS.

In de figuren 1 en 2 zijn twee mogelijke uitvoeringsvormen van de uitvinding schematisch weergegeven. In Figures 1 and 2 show two possible embodiments of the invention is shown schematically.

Figuur 1 toont de uitvinding zoals deze in een contactloze identificatie- of IC-kaart is geïntegreerd. Figure 1 shows the invention as it in a contact-free identification or IC card is integrated. Do volgende onderdelen zijn in figuur 1 te onderscheiden: Th following parts can be distinguished in Figure 1:

De open gewerkte behuizing (1) van de kaart; The openwork housing (1) of the card; de grote antennespoel (2), die uit één of een zeer klein aantal windingen is samengesteld en zo dicht mogelijk langs de rand van de behuizing is aangebracht; the main antenna coil (2), which is composed of one or a very small number of turns and is disposed as close as possible along the edge of the housing; de primaire spoel (3) van de transformator, die uit een klein aantal, bijvoorbeeld twee windingen rond de kern is samengesteld; the primary coil (3) of the transformer, which is composed of a small number of, for example, two turns around the core; de kern (4) van de transformator; the core (4) of the transformer; de secundaire spoel (5) van de transformator, die uit een groot aantal windingen, bijvoorbeeld 200, rond de kern is samenge-. the secondary coil (5) of the transformer, which consists of a large number of turns, e.g., 200, is assembled around the core. steld; adjusted; de condensator (6) die, via de transformator, met antennespoel (2) de afstemkring vormt. the capacitor (6), which forms through the transformer, with an antenna coil (2), the tuned circuit. De resonantiefrequentie van de kring wordt oa bepaald door de primaire (3) en de secundaire (5) spoel van de transformator, de grote antennespoel (2), en de condensator (6); The resonant frequency of the circuit is partly determined by the primary (3) and the secondary (5) coil of the transformer, the main antenna coil (2), and the capacitor (6);

De aansluitpunten (7) en (8) voor de geïntegreerde electronische schakeling (9). The terminals (7) and (8) for the integrated electronic circuit (9).

In figuur 2 wordt, in twee aanzichten, een eventueel mogelijke uitvoering van een contactloze identificatiepolsband schematisch weergegeven. Figure 2 shows, in two views, an optionally schematically shown possible embodiment of a contact-free identification wrist band. De volgende onderdelen zijn in figuur 2 te onderscheiden: de elastische polsband (10); The following parts can be distinguished in Figure 2: the elastic wrist strap (10); de behuizing (1) van de transformator en de electronica, die eventueel buigzaam kan zijn; the housing (1) of the transformer and of the electronics, which may optionally be flexible; - 4 - de elastische antennespoel (2), die bij voorkeur uit één winding is samengesteld en in de polsband geïntegreerd is; - 4 - The elastic antenna coil (2), which is preferably composed of one winding and is integrated into the wrist strap; de primaire spoel (3) van de transformator, die uit een klein aantal, bijvoorbeeld twee windingen rond de kern is samengesteld; the primary coil (3) of the transformer, which is composed of a small number of, for example, two turns around the core; de kern (4) van de transformator; the core (4) of the transformer; de secundaire spoel (5) van de transformator, die uit een groot aantal windingen, bijvoorbeeld 200, rond de kern is samengesteld; the secondary coil (5) of the transformer, which consists of a large number of turns, e.g., 200, is assembled around the core; de condensator (6) die, via de transformator, met antennespoel (2) de afstemkring vormt. the capacitor (6), which forms through the transformer, with an antenna coil (2), the tuned circuit. De resonantiefrequentie van de kring wordt oa bepaald door de primaire (3) en de secundaire (5) spoel van de transformator, de grote antennespoel (2), en de condensator (6). The resonant frequency of the circuit is partly determined by the primary (3) and the secondary (5) coil of the transformer, the main antenna coil (2), and the capacitor (6).

De aansluitpunten (7) en (8) voor de geïntegreerde elektronische schakeling (9). The terminals (7) and (8) for the integrated electronic circuit (9).

Het aantal windingen van de antennespoel (2) wordt teruggebracht tot een zeer beperkt aantal windingen (bij voorkeur één winding) en de spanning over deze spoel door middel van een transformator omhoog getransformeerd. The number of turns of the antenna coil (2) is reduced to a very limited number of turns (preferably, one turn), and the voltage across this coil transformed by means of a transformer upward. De condensator (6), die deel uit maakt van de afstemkring, wordt op de secundaire kant (5) van de transformator aangesloten. The capacitor (6), which forms part of the tuned circuit, is connected to the secondary side (5) of the transformer. De transformator dient zeer dun te zijn om in de behuizing van de kaart te kunnen worden geïntegreerd. The transformer must be very thin to be integrated into the housing of the card. De kern (4) van de transformator dient flexibel te zijn en is bijvoorbeeld samengesteld uit een aantal lagen van zeer dunne, (bv 20 pm dik) ringvormige of rechthoekige lamellen van amorf metaal met een hoge magnetische permeabiliteit, lage hysterese- en wervelstroomverliezen en een relatief hoge electrische weerstand. The core (4) of the transformer needs to be flexible and is, for example, composed of a plurality of layers of very thin (for example, 20 pm thick) annular or rectangular slats of amorphous metal having a high magnetic permeability, low hysteresis and eddy current losses, and a relatively high electrical resistance. Voor het integreren van de antenneconfiguratie in een behuizing, waarbij alleen de antennespoel buigzaam behoeft te zijn en waarbij de transformator in een gedeelte van de behuizing kan worden gebracht dat niet buigzaam is, kan eventueel gebruik worden gemaakt van een transformatorkern van ferriet. For the integration of the antenna configuration in a housing, in which only the antenna coil to be flexible required and in which the transformer can be brought into a portion of the housing that is not flexible, use can optionally be made of a transformer core of ferrite.

Het gebruik van een transformator za 1 weliswaar electrische verliezen introduceren, die de afstand waarover informatie-overdracht mogelijk is, zullen verkleinen, maar zal ook indirect het voordeel opleveren, dat de mechanische eigenschappen ten aanzien van buigzaamheid en vormherstel na buiging, buig- en torsie-bestendigheid, en daarmee duurzaamheid, eenvoudiger te realiseren zijn. The use of a transformer sa 1, while introducing electric losses, which will decrease the distance over which information transmission is possible, but will also indirectly provide the advantage, that the mechanical properties with respect to flexibility and shape recovery after flexing, bending and torsional -resistance, and thus durability, are easier to achieve. Deze verbeteringen zijn het directe gevolg van het vervangen van de stugge spoel met het grote aantal windingen, door een antennespoel met slechts één of enkele windingen. These improvements are the direct result of the replacement of the rigid bobbin with the large number of windings, by a antenna coil with only one or a few turns.

Claims (5)

1. Antenneconfiguratie voor contactloze identificatielabels, met het kenmerk, dat deze antenneconfiguratie een afgestemde kring is, die is opgebouwd uit een antennespoel, een transformator en een condensator, waarbij de antennespoel een groot oppervlak omsluit door deze dicht langs de rand van de behuizing van het label aan te brengen, en slechts uit één winding of een zeer klein aantal windingen is samengesteld waardoor de spoel buigzaam kan zijn, en waarbij de antennespoel is verbonden met de primaire spoel van de transformator en de condensator met de secundaire spoel van de transformator, waarbij de secundaire spoel is samengesteld uit een veel groter aantal windingen dan de primaire spoel, waardoor de spanning die in een wisselend electromagnetisch veld over de antennespoel ontstaat, een veel hogere spanning over de condensator tot gevolg heeft, waarmee de actieve componenten van de elec-tronische schakeling in het label kunnen worden gevoed en waarbij de antenneconfiguratie ook 1. Antenna Configuration for contactless identification label, characterized in that this antenna configuration is a tuned circuit, which is composed of an antenna coil, a transformer and a capacitor, wherein the antenna coil encloses a large surface area by that close to the edge of the housing of the to apply label, and only of one turn or a very small number of windings is composed so that the coil may be flexible, and wherein the antenna coil is connected to the primary coil of the transformer and the capacitor having the secondary coil of the transformer, wherein the secondary coil is composed of a much larger number of turns than the primary coil, whereby the stress that occurs in an alternating electromagnetic field across the antenna coil, results in a much higher voltage across the capacitor, with which the active components of the elec-tronic circuit can be fed in the label, and wherein the antenna configuration is also kan worden gebruikt om de data-over-dracht tussen een zend/ontvanger en het label, waarin deze antenneconfiguratie is aangebracht, te verzorgen. can be used to provide the over-data-transfer between a transmitter / receiver, and the label, in which this antenna configuration is disposed.
2. Antenneconfiguratie volgens conclusie 1, met het kenmerk, dat de kern van de transformator buigzaam is. 2. An antenna configuration according to claim 1, characterized in that the core of the transformer is flexible.
3. Antenneconfiguratie volgens conclusie 1 en 2, met het kenmerk, dat de kern van de transformator is samengesteld uit één of meer lamellen van buigzaam amorf metaal met een hoge magnetische permeabiliteit. 3. An antenna configuration according to claim 1 and 2, characterized in that the core of the transformer is composed of one or more slats of flexible amorphous metal having a high magnetic permeability.
4. Antenneconfiguratie volgens één der voorgaande conclusies, met het kenmerk, dat de antenneconfiguratie uiterst plat is uitge- voerd en geïntegreerd is in een contactloze .identificatie-kaart of IC-kaart, met afmetingen en mechanische eigenschappen overeenkomstig de norm ISO-7816. 4. An antenna configuration according to any one of the preceding claims, characterized in that the antenna configuration is extremely flat is carried out and integrated in a non-contact .identificatie card or IC card, with dimensions and mechanical properties in accordance with the standard ISO-7816.
5. Antenneconfiguratie volgens conclusie 1, 2 of 3, met het kenmerk, dat de antenneconfiguratie is geïntegreerd in een contactloze identificatiepolsband bestaande uit een eventueel platte en/of buigzame behuizing en een eventueel elastische sluitband al dan niet voorzien van een sluiting, waarbij de antennespoel is aangebracht in de sluitband, om zodoende een groot oppervlak te omsluiten en waarbij de transformator tezamen met de geïntegreerde electronische schakeling(en) zijn aangebracht in voornoemde behuizing. 5. The antenna configuration of claim 1, 2 or 3, characterized in that the antenna configuration is integrated in a contact-free identification wristband comprising an optionally flat and / or flexible housing, and an optionally elastic closing band may or may not be provided with a closure, wherein the antenna coil is provided in the closure strip, in order to encompass a large surface area, and wherein the transformer, together with the integrated electronic circuit (s) are provided in said housing.
NL9100176A 1991-02-01 1991-02-01 Antenna with transformer for non-contact transfer of information from the integrated circuit card. NL9100176A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
NL9100176A NL9100176A (en) 1991-02-01 1991-02-01 Antenna with transformer for non-contact transfer of information from the integrated circuit card.
NL9100176 1991-02-01

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL9100176A NL9100176A (en) 1991-02-01 1991-02-01 Antenna with transformer for non-contact transfer of information from the integrated circuit card.

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NL9100176A true NL9100176A (en) 1992-03-02

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