WO2013007280A1 - Antenne pour une mémoire de données lisible sans contact et transpondeur rfid - Google Patents

Antenne pour une mémoire de données lisible sans contact et transpondeur rfid Download PDF

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Publication number
WO2013007280A1
WO2013007280A1 PCT/EP2011/061649 EP2011061649W WO2013007280A1 WO 2013007280 A1 WO2013007280 A1 WO 2013007280A1 EP 2011061649 W EP2011061649 W EP 2011061649W WO 2013007280 A1 WO2013007280 A1 WO 2013007280A1
Authority
WO
WIPO (PCT)
Prior art keywords
antenna
antenna element
antenna according
base
layer
Prior art date
Application number
PCT/EP2011/061649
Other languages
German (de)
English (en)
Inventor
Gerhard RÖTTER
Original Assignee
Siemens Aktiengesellschaft
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 Siemens Aktiengesellschaft filed Critical Siemens Aktiengesellschaft
Priority to PCT/EP2011/061649 priority Critical patent/WO2013007280A1/fr
Publication of WO2013007280A1 publication Critical patent/WO2013007280A1/fr

Links

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
    • H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
    • H01Q1/38—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith formed by a conductive layer on an insulating support
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q9/00—Electrically-short antennas having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements
    • H01Q9/04—Resonant antennas
    • H01Q9/0407—Substantially flat resonant element parallel to ground plane, e.g. patch antenna

Definitions

  • the invention relates to an antenna for a non-contact readable data memory according to the preamble of patent claim 1, and an RFID transponder with a erfindungsge MAESSEN antenna according to claim 13.
  • RFID transponders As mobile, wirelessly readable data storage so-called RFID transponders are known, which consist essentially of an electronic circuit and an antenna. In most cases, these RFID transponders are powered by an electromagnetic field generated by an RFID read / write device. In particular, these transponders operating without an external power supply in the sense of a battery or a power supply unit are widely used in the industrial environment, among other things because they are inexpensive to produce. Especially in the mentioned industrial environment, so for example when used in industrial au ⁇ tomatmaschinesanssenen, and reliable operation on the other hand reached comparable under adverse operating conditions. These unfavorable operating conditions can be present in particular when the contactlessly readable data memory ⁇ , ie the RFID transponder, mounted on a metallic surface or glued.
  • planar antennas regularly from a fully conductive reference plane ("Ground Plane") and arranged over a radiating element ("patch”), also called antenna element formed is, wherein the antenna element as a stripline, often referred to as "microstrip line” or “microstrip” is formed.
  • Air is often used as the "medium" between the base surface and the antenna element in high-frequency technology, the use of air as the medium having the advantage that there is only slight temperature dependence of the electrical impedance or characteristic impedance of the device, which whose words means that the frequency response or the usable frequency range of the antenna is substantially independent of temperature.
  • such antennas have the disadvantage of a comparatively large space requirements on. to solve this problem, it is known as a medium Zvi ⁇ rule of the reference surface and the radiating antenna element instead of air, to use a solid substrate whose dielectric permittivity is much greater than 1. Since ⁇ with, it is possible antennas talten significantly physically smaller to GES, as such antennas for the same frequency range in which air is disposed as a medium between the surfaces.
  • the antennas in which a solid medium or substrate between see the base and the antenna element is arranged, however, have the disadvantage that they have a comparatively strong ⁇ temperature dependence of the frequency response or the usable frequency range.
  • This means that such antennas are regularly designed for a specific, relatively narrow temperature range, in which case use at other temperatures is not possible or only possible to a limited extent.
  • reliable use over a wide temperature range which may be over 100 ° C, is often required.
  • an RFID transponder or a data memory with an antenna wherein this antenna is to be provided as a planar antenna with a reference plane (base surface) and a radiant antenna element arranged at a distance therebetween, wherein the base and the antenna element is disposed a layered layer structure of at least one layer with a substrate or plastic with relatively ho ⁇ forth dielectric permittivity and with at least one white ⁇ direct air layer or layer of gas or evacuated space or executed.
  • the electrically required length of the antenna or of the radiating antenna element is realized by an asymmetrical meandering structure, which reduces the length and often also the volume of the antenna.
  • an antenna for a non-contact readable data memory according to the patent claim 1.
  • an antenna for a non-contact readable data memory is proposed, wherein the antenna element substantially of a strip-shaped
  • Ladder is formed. Between the base surface and the second plane with the antenna element is at least a first
  • a gaseous medium for example air
  • the thus constructed antenna has a small footprint, is inexpensive to manufacture and has a low Tem ⁇ perature dependence on.
  • the solution of the problem also provides a UHF RFID
  • Transponder which is equipped with an antenna as described above.
  • Such an RFID transponder can be produced inexpensively and with small footprint and works over a wide temperature range.
  • the antenna according to the invention are specified in the dependent claims.
  • the features and advantages described here apply correspondingly to the RFID transponder according to the invention, that is to say for a mobile data memory equipped according to the invention.
  • the features described in the dependent claims can act either individually or in free combination with each other.
  • a first layer a material is selected having a ho ⁇ hen dielectric permittivity advantageous, these being the permittivity ⁇ lectric should be significantly larger than the first This allows the "thickness" of the antenna, so the required Construction volume, to be lowered.
  • the first layer consists of a plastic material, wherein such plastic materials usually have the desired high dielectric permittivity due to the hydrocarbons present.
  • the first serves
  • the layer consisting of the solid substrate may be used as the base support.
  • the antenna element AE in the space between the base surface and two disposed through an air layer separate layers of solid substrate the antenna element AE, and then each of these layers as a carrier for the antenna element or a support for the base or as a cover for the base can be used.
  • the two layers can also consist of different materials with different dielectric permittivity.
  • the base consists of a substantially full-surface conductor which completely covers the area spanned by the antenna element AE.
  • the base consists of a substantially full-surface conductor which completely covers the area spanned by the antenna element AE.
  • the antenna element is asymmetrical to the
  • Base formed which is preferably designed as a solid surface ⁇ .
  • a particularly space-saving variant of the ⁇ An antenna arises also when designed as a strip-shaped conductor, the antenna element is formed in a meandering structure, an asymmetric, so un- contributes uniform "width" of the meander-shaped pattern to achieve a wider usable frequency range.
  • the asymmetric meandering structure has continued denjeni ⁇ gen advantage that the feed point of the antenna element may be on the edge, so that a conductor guide at a center of the meander-shaped pattern is not necessary ,
  • the antenna element and the underlying solid layers and the base surface aligned with one another Ausspa ⁇ ments, which in total one way to Be ⁇ consolidation of the antenna means a central fixing screw or similar ⁇ results.
  • a possible screw head of a fastening screw is advantageously the stripline ⁇ ter constituting the antenna element is guided in such a manner to the off ⁇ savings around, that an electrical contact of the strip conductor is avoided to a fastening screw and, in particular, in a further advantageous embodiment is not or not substantially above the antenna element or egg ⁇ nen part of the strip conductor protrudes.
  • the base surface is also spaced from the recess such that an electrical contact of the electrically conductive base surface does not result in a fastening screw.
  • FIG. 1 shows a planar antenna according to the prior art
  • the antenna element is designed as a Stripes ⁇ fenleiter and wherein the space be- see the base surface and the antenna element is completely filled by a solid substrate,
  • Figure 2 is a schematic representation of an antenna according to the invention, in which between the base and the antenna element both two layers with a solid substrate, and an air layer is arranged, and Figure 3 is an asymmetric meander structure formed in an antenna element with a recess for a fastener.
  • FIG. 1 shows an antenna according to an embodiment, which is known from the prior art.
  • This be ⁇ stands from a base GP (Ground Plane), on which in a further, parallel plane, an antenna element AE is arranged, which is designed as a microstrip line.
  • the installation space between the base area GP and the antenna element AE is completely filled by a solid substrate, which simultaneously acts as a carrier material for the base area GP and the antenna element AE.
  • Both the Grundflä ⁇ che GP and the antenna element AE consist of a conductive material, such as copper, silver, steel sheet or the like.
  • FIG. 2 shows the development according to the invention of the antenna already described with reference to FIG.
  • a layer system is used, which consists of the substrate layers Sl, S2 and arranged therebetween
  • FIG. 2 shows an advantageous embodiment in which two solid layers S1, S2 are used and the substrate layer S1 simultaneously constitutes a carrier material for the electrically conductive base area GP, and in which the substrate layer S2 simultaneously forms the carrier material for the antenna element AE.
  • the antenna element AE is shown only ⁇ section-wise, wherein in a real arrangement, the length of the strip-like conductor element which forms the AE An ⁇ antenna element, depending on the wavelength of the frequency is to be selected, to the tune the antenna is. This results in an overall antenna, which is relatively long, which is disturbing for many applications.
  • the configuration of the arrival antenna elements according to the invention as an asymmetric meandering structure is provided ⁇ , whereby a RFID transponder can be configured, for example as a circular disc.
  • An Ausspa ⁇ tion A which penetrates both the plane with the antenna element AE and the underlying substrate layer or substrate layers Sl, S2 and the base GP, makes it possible to the RFID transponder, for example by means of a central screw fasten.
  • the curve of the antenna element AE or of the meandering stripline to be selected such that a minimum distance to the fastening screw he ⁇ gives;
  • an electrically conductive connection between the antenna element AE and a Befest Trentsschrau be avoided.
  • a possible screw head of a fastening screw should not be arranged covering or shielding over the strip conductor or over a part of the antenna element AE.

Abstract

L'invention concerne un transpondeur RFID et une antenne destinés à une mémoire de données lisible sans contact. L'antenne comporte une surface de base (GP) et un élément d'antenne (AE) dans un autre plan disposé sensiblement de manière parallèle par rapport à la surface de base (GP) et distant de celui-ci, l'élément d'antenne (AE) étant formé sensiblement à partir d'un conducteur en forme de ruban. Au moins une première couche (S1, S2) dotée d'un substrat solide et au moins une autre couche (S1, S2) sont disposées entre la surface de base (GP) et le deuxième plan avec l'élément d'antenne (AE), l'autre couche (S1, S2) étant remplie d'un milieu de forme gazeuse, en particulier de l'air, ou étant sous vide. Une telle antenne et une telle mémoire de données (transpondeur RFID) peuvent être construites avec une petite taille et à peu de frais et présentent une plage de fréquences étendue et indépendante de la température.
PCT/EP2011/061649 2011-07-08 2011-07-08 Antenne pour une mémoire de données lisible sans contact et transpondeur rfid WO2013007280A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/EP2011/061649 WO2013007280A1 (fr) 2011-07-08 2011-07-08 Antenne pour une mémoire de données lisible sans contact et transpondeur rfid

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP2011/061649 WO2013007280A1 (fr) 2011-07-08 2011-07-08 Antenne pour une mémoire de données lisible sans contact et transpondeur rfid

Publications (1)

Publication Number Publication Date
WO2013007280A1 true WO2013007280A1 (fr) 2013-01-17

Family

ID=44628904

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2011/061649 WO2013007280A1 (fr) 2011-07-08 2011-07-08 Antenne pour une mémoire de données lisible sans contact et transpondeur rfid

Country Status (1)

Country Link
WO (1) WO2013007280A1 (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4366484A (en) * 1978-12-29 1982-12-28 Ball Corporation Temperature compensated radio frequency antenna and methods related thereto
US4651159A (en) * 1984-02-13 1987-03-17 University Of Queensland Microstrip antenna
WO2008147662A1 (fr) * 2007-05-31 2008-12-04 Symbol Technologies, Inc. Antenne à élément microruban robuste et léger incorporant un espace diélectrique squelette

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4366484A (en) * 1978-12-29 1982-12-28 Ball Corporation Temperature compensated radio frequency antenna and methods related thereto
US4651159A (en) * 1984-02-13 1987-03-17 University Of Queensland Microstrip antenna
WO2008147662A1 (fr) * 2007-05-31 2008-12-04 Symbol Technologies, Inc. Antenne à élément microruban robuste et léger incorporant un espace diélectrique squelette

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