JP2005252853A - Antenna for rf-id - Google Patents

Antenna for rf-id Download PDF

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Publication number
JP2005252853A
JP2005252853A JP2004062751A JP2004062751A JP2005252853A JP 2005252853 A JP2005252853 A JP 2005252853A JP 2004062751 A JP2004062751 A JP 2004062751A JP 2004062751 A JP2004062751 A JP 2004062751A JP 2005252853 A JP2005252853 A JP 2005252853A
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Japan
Prior art keywords
antenna
information
chip
frequency
writing
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JP2004062751A
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Japanese (ja)
Inventor
Shiro Sugimura
詩朗 杉村
Hideki Kobayashi
英樹 小林
Kiichiro Ogawa
喜一郎 小川
Yoshiaki Ide
義章 井手
Hironari Takahashi
裕也 高橋
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FEC Inc
Toppan Edge Inc
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Toppan Forms Co Ltd
FEC Inc
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Priority to JP2004062751A priority Critical patent/JP2005252853A/en
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    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K19/00—Record carriers for use with machines and with at least a part designed to carry digital markings
    • G06K19/06—Record 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
    • G06K19/067—Record 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
    • G06K19/07—Record 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
    • G06K19/0723—Record 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 the record carrier comprising an arrangement for non-contact communication, e.g. wireless communication circuits on transponder cards, non-contact smart cards or RFIDs
    • G06K19/0724—Record 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 the record carrier comprising an arrangement for non-contact communication, e.g. wireless communication circuits on transponder cards, non-contact smart cards or RFIDs the arrangement being a circuit for communicating at a plurality of frequencies, e.g. for managing time multiplexed communication over at least two antennas of different types
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K19/00—Record carriers for use with machines and with at least a part designed to carry digital markings
    • G06K19/06—Record 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
    • G06K19/067—Record 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
    • G06K19/07—Record 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
    • G06K19/077—Constructional details, e.g. mounting of circuits in the carrier
    • G06K19/07749—Constructional 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
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K19/00—Record carriers for use with machines and with at least a part designed to carry digital markings
    • G06K19/06—Record 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
    • G06K19/067—Record 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
    • G06K19/07—Record 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
    • G06K19/077—Constructional details, e.g. mounting of circuits in the carrier
    • G06K19/07749—Constructional 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
    • G06K19/07766—Constructional 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 comprising at least a second communication arrangement in addition to a first non-contact communication arrangement
    • G06K19/07767—Constructional 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 comprising at least a second communication arrangement in addition to a first non-contact communication arrangement the first and second communication means being two different antennas types, e.g. dipole and coil type, or two antennas of the same kind but operating at different frequencies
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K19/00—Record carriers for use with machines and with at least a part designed to carry digital markings
    • G06K19/06—Record 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
    • G06K19/067—Record 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
    • G06K19/07—Record 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
    • G06K19/077—Constructional details, e.g. mounting of circuits in the carrier
    • G06K19/07749—Constructional 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
    • G06K19/07773—Antenna details
    • G06K19/07777—Antenna details the antenna being of the inductive type
    • G06K19/07779—Antenna details the antenna being of the inductive type the inductive antenna being a coil
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K19/00—Record carriers for use with machines and with at least a part designed to carry digital markings
    • G06K19/06—Record 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
    • G06K19/067—Record 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
    • G06K19/07—Record 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
    • G06K19/077—Constructional details, e.g. mounting of circuits in the carrier
    • G06K19/07749—Constructional 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
    • G06K19/07773—Antenna details
    • G06K19/07777—Antenna details the antenna being of the inductive type
    • G06K19/07779—Antenna details the antenna being of the inductive type the inductive antenna being a coil
    • G06K19/07783—Antenna details the antenna being of the inductive type the inductive antenna being a coil the coil being planar
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K19/00—Record carriers for use with machines and with at least a part designed to carry digital markings
    • G06K19/06—Record 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
    • G06K19/067—Record 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
    • G06K19/07—Record 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
    • G06K19/077—Constructional details, e.g. mounting of circuits in the carrier
    • G06K19/07749—Constructional 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
    • G06K19/07773—Antenna details
    • G06K19/07786—Antenna details the antenna being of the HF type, such as a dipole

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  • Engineering & Computer Science (AREA)
  • Computer Hardware Design (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Near-Field Transmission Systems (AREA)
  • Variable-Direction Aerials And Aerial Arrays (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To provide an antenna for an RF-ID connected with an IC chip capable of writing and reading information using a plurality of frequencies, which can resonate with an arbitrary frequency among the plurality of frequencies with which the information can be written/read by the IC chip. <P>SOLUTION: An antenna part 111 resonating with a frequency of 13.56 MHz, an antenna part 112 resonating with a frequency of 2.45 GHz, and an antenna part 113 resonating with a frequency of 950 MHz are formed on a base material 102 so that they are connected with lands 103a and 103b with the IC chip 101 connected. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

本発明は、非接触型ＩＣカード等のＲＦ−ＩＤに用いられるＲＦ−ＩＤ用アンテナに関し、特に、複数の周波数を用いて情報の書き込み及び読み出しが可能なＩＣチップが搭載されたＲＦ−ＩＤに用いられるＲＦ−ＩＤ用アンテナに関する。   The present invention relates to an RF-ID antenna used for RF-ID such as a non-contact IC card, and more particularly to an RF-ID equipped with an IC chip capable of writing and reading information using a plurality of frequencies. The present invention relates to an RF-ID antenna.

昨今、情報化社会の進展に伴って、情報をカードに記録し、該カードを用いた情報管理や決済等が行われている。また、商品等に貼付されるラベルやタグに情報を記録し、このラベルやタグを用いての商品等の管理も行われている。   In recent years, with the progress of the information society, information is recorded on a card, and information management and settlement using the card are performed. Information is recorded on a label or tag attached to a product or the like, and the product or the like is managed using the label or tag.

このようなカードやラベル、あるいはタグを用いた情報管理においては、カードやラベル、あるいはタグに対して非接触状態にて情報の書き込み及び読み出しを行うことが可能なＩＣが搭載された非接触型ＩＣカードや非接触型ＩＣラベル、あるいは非接触型ＩＣタグ等といったＲＦ−ＩＤがその優れた利便性から急速な普及が進みつつある。   In information management using such a card, label, or tag, a non-contact type equipped with an IC capable of writing and reading information in a non-contact state on the card, label, or tag. RF-IDs such as IC cards, non-contact type IC labels, or non-contact type IC tags are rapidly spreading due to their excellent convenience.

図４は、従来の非接触型ＩＣタグの一例を示す図である。   FIG. 4 is a diagram illustrating an example of a conventional non-contact type IC tag.

本従来例は図４に示すように、樹脂や紙等からなるベース基材５０２上に、導電性のアンテナ５１０がコイル状に形成されており、このアンテナ５１０に接続されるように、非接触状態にて情報の書き込み及び読み出しが可能なＩＣチップ５０１が搭載されて構成されている。なお、ＩＣチップ５０１においては、１３．５６ＭＨｚの周波数帯にて情報の書き込み及び読み出しが可能なものであり、そのため、アンテナ５１０は、１３．５６ＭＨｚの周波数に共振するような長さ及び巻き数に設計されている。   In this conventional example, as shown in FIG. 4, a conductive antenna 510 is formed in a coil shape on a base substrate 502 made of resin, paper, or the like, and is contactless so as to be connected to the antenna 510. An IC chip 501 capable of writing and reading information in a state is mounted. Note that the IC chip 501 can write and read information in the 13.56 MHz frequency band. Therefore, the antenna 510 has a length and a number of turns so as to resonate at a frequency of 13.56 MHz. Designed.

上記のように構成された非接触型ＩＣタグ５００においては、１３．５６ＭＨｚの周波数帯にて情報の書き込み及び読み出しを行う情報書込／読出装置（不図示）に近接させることにより、情報書込／読出装置からの電磁誘導によりアンテナ部５１０に電流が流れ、この電流がＩＣチップ５０１に供給され、それにより、非接触状態において、情報書込／読出装置からＩＣチップ５０１に情報が書き込まれたり、ＩＣチップ５０１に書き込まれた情報が情報書込／読出装置にて読み出されたりする。   In the non-contact type IC tag 500 configured as described above, the information writing is performed by being close to an information writing / reading device (not shown) that writes and reads information in the 13.56 MHz frequency band. / Current flows through the antenna portion 510 by electromagnetic induction from the reading device, and this current is supplied to the IC chip 501, so that information can be written from the information writing / reading device to the IC chip 501 in a non-contact state. The information written in the IC chip 501 is read out by the information writing / reading device.

また、近年においては、小型化及び通信可能距離を確保するために、２．４５ＧＨｚの周波数帯を利用して通信を行う微細なＩＣチップを用いたＲＦ−ＩＤが利用されはじめている。このような微細なＩＣチップを用いたＲＦ−ＩＤにおいては、導電性のアンテナを接続することによりＩＣチップの通信可能距離を延ばすことができる。   In recent years, RF-ID using a fine IC chip that performs communication using a frequency band of 2.45 GHz has begun to be used in order to ensure miniaturization and a communicable distance. In an RF-ID using such a fine IC chip, the communicable distance of the IC chip can be extended by connecting a conductive antenna.

図５は、２．４５ＧＨｚの周波数帯を利用して通信を行うＩＣチップが搭載された非接触型ＩＣタグの一例を示す図である。   FIG. 5 is a diagram illustrating an example of a non-contact type IC tag on which an IC chip that performs communication using a frequency band of 2.45 GHz is mounted.

本従来例は図５に示すように、樹脂や紙等からなるベース基材６０２上に、互いに直列に並ぶように所定の間隔を有して形成された２つの帯状の導体６１０ａ，６１０ｂからなるアンテナ部６１０が形成されており、この２つの導体６１０ａ，６１０ｂに接続されるように、非接触状態にて情報の書き込み及び読み出しが可能なＩＣチップ６０１が搭載されて構成されている。なお、ＩＣチップ６０１においては、２．４５ＧＨｚの周波数帯にて情報の書き込み及び読み出しが可能なものであり、そのため、アンテナ部６１０の長さは、２．４５ＧＨｚの周波数に共振するように設計されている。   As shown in FIG. 5, this conventional example is composed of two strip-shaped conductors 610a and 610b formed on a base substrate 602 made of resin, paper, or the like, with a predetermined interval so as to be arranged in series with each other. An antenna portion 610 is formed, and an IC chip 601 capable of writing and reading information in a non-contact state is mounted so as to be connected to the two conductors 610a and 610b. Note that the IC chip 601 can write and read information in the 2.45 GHz frequency band. Therefore, the length of the antenna portion 610 is designed to resonate at a frequency of 2.45 GHz. ing.

上記のように構成された非接触型ＩＣタグ６００においては、２．４５ＧＨｚの周波数帯にて情報の書き込み及び読み出しを行う情報書込／読出装置（不図示）に近接させることにより、情報書込／読出装置からの電波によりアンテナ部６１０に電流が流れ、この電流がＩＣチップ６０１に供給され、それにより、非接触状態において、情報書込／読出装置からＩＣチップ６０１に情報が書き込まれたり、ＩＣチップ６０１に書き込まれた情報が情報書込／読出装置にて読み出されたりする。   In the non-contact type IC tag 600 configured as described above, information writing is performed by being close to an information writing / reading device (not shown) that writes and reads information in the 2.45 GHz frequency band. / A current flows to the antenna unit 610 by the radio wave from the reading device, and this current is supplied to the IC chip 601, thereby writing information from the information writing / reading device to the IC chip 601 in a non-contact state. Information written in the IC chip 601 is read out by an information writing / reading device.

また、従来より、二等辺三角形からなる２つの導体が、その頂点が空隙を介して互いに対向するように配置されてなるボウタイアンテナが利用されている。   Conventionally, a bow tie antenna is used in which two conductors made of isosceles triangles are arranged so that their vertices face each other with a gap therebetween.

図６は、一般的なボウタイアンテナを有する非接触型ＩＣタグの一例を示す図である。   FIG. 6 is a diagram showing an example of a non-contact type IC tag having a general bow tie antenna.

本従来例は図６に示すように、樹脂や紙等からなるベース基材７０２上に、二等辺三角形の形状を有する２つの導体７１０ａ，７１０ｂが、二等辺三角形の等しい辺がなす頂点どうしを結んだ直線が二等辺三角形の底辺のそれぞれに対して垂直となるように、かつ、頂点どうしが空隙を有するように配置されてなるアンテナ部７１０が形成されており、この２つの導体７１０ａ，７１０ｂに接続されるように、非接触状態にて情報の書き込み及び読み出しが可能なＩＣチップ７０１が搭載されて構成されている。   In this conventional example, as shown in FIG. 6, two conductors 710 a and 710 b having an isosceles triangle shape are formed on a base substrate 702 made of resin, paper, or the like. An antenna portion 710 is formed such that the connected straight line is perpendicular to each of the bases of the isosceles triangles and the apexes have a gap, and the two conductors 710a and 710b are formed. An IC chip 701 capable of writing and reading information in a non-contact state is mounted and connected.

上記のように構成された非接触型ＩＣタグ７００においては、外部に設けられた情報書込／読出装置（不図示）に近接させることにより、情報書込／読出装置からの電磁誘導によりアンテナ部７１０に電流が流れ、この電流がＩＣチップ７０１に供給され、それにより、非接触状態において、情報書込／読出装置からＩＣチップ７０１に情報が書き込まれたり、ＩＣチップ７０１に書き込まれた情報が情報書込／読出装置にて読み出されたりする。   In the non-contact type IC tag 700 configured as described above, an antenna unit is provided by electromagnetic induction from the information writing / reading device by being brought close to an information writing / reading device (not shown) provided outside. A current flows through 710, and this current is supplied to the IC chip 701. Thereby, information is written to the IC chip 701 from the information writing / reading device in a non-contact state, and information written to the IC chip 701 is read. It is read by an information writing / reading device.

ここで、上述した非接触型ＩＣタグ７００においては、図６中の、Ｂ−Ｂ’間と、Ｃ−Ｃ’間とでアンテナ部７１０の長さが異なるため、Ｂ−Ｂ’間の長さと、Ｃ−Ｃ’間の長さとのそれぞれに応じた共振点が存在することになる。さらに、アンテナ部７１０を構成する２つの導体７１０ａ，７１０ｂがそれぞれ二等辺三角形の形状を有するものであるため、アンテナ部７１０の長さは、Ｂ−Ｂ’間からＣ−Ｃ’間に渡って無段階に変化している。これにより、ＩＣチップ７０１に対する情報の書き込み及び読み出しを行うために決められた周波数に対して実際の周波数が多少ずれた場合であっても、ＩＣチップ７０１に対する情報の書き込み及び読み出しを行うことができるようになる。   Here, in the non-contact type IC tag 700 described above, the length of the antenna unit 710 is different between BB ′ and CC ′ in FIG. And a resonance point corresponding to each of the length between CC ′. Further, since the two conductors 710a and 710b constituting the antenna unit 710 have an isosceles triangular shape, the length of the antenna unit 710 extends from between BB ′ to CC ′. It is changing steplessly. As a result, even when the actual frequency is slightly shifted from the frequency determined for writing and reading information to and from the IC chip 701, information can be written to and read from the IC chip 701. It becomes like this.

また、このようなボウタイアンテナにおいて、二等辺三角形の等しい辺の形状を曲線状や階段状にすることにより、下限周波数を下げ、それによりさらなる広帯域なアンテナが考えられている（例えば、特許文献１参照。）。
特開２００２−１３５０３７号公報 Moreover, in such a bow tie antenna, the lower limit frequency is lowered by making the shape of the equal sides of the isosceles triangle equal to a curved shape or a step shape, thereby further wideband antennas are considered (for example, Patent Document 1). reference.).
JP 2002-135037 A

上述したように近年においてはＲＦ−ＩＤが急速に普及しており、その通信周波数として、上述した１３．５６ＭＨｚ及び２．４５ＧＨｚ、さらには、９５０ＭＨｚといった互いに異なるものが利用されている。   As described above, in recent years, RF-ID has been rapidly spread, and different communication frequencies such as 13.56 MHz, 2.45 GHz, and 950 MHz are used as communication frequencies.

例えば、航空手荷物に装着される非接触型ＩＣタグにおいては、日本では１３．５６ＭＨｚの周波数帯を用いて通信を行うものが利用され、また、米国においてはＵＨＦ帯や２．４５ＧＨｚの周波数帯を用いて通信を行うものが利用されている。そのため、それぞれの周波数に応じた非接触型ＩＣタグを用意しなければならず、１つの非接触型ＩＣタグに対して複数の周波数を用いて情報の書き込み及び読み出しを行うことができるものが望まれていた。   For example, as a non-contact type IC tag attached to an air baggage, one that uses a 13.56 MHz frequency band in Japan is used, and in the United States, a UHF band or 2.45 GHz frequency band is used. The one that uses and communicates is used. Therefore, a non-contact type IC tag corresponding to each frequency must be prepared, and it is desirable to be able to write and read information using a plurality of frequencies for one non-contact type IC tag. It was rare.

また、ＲＦ−ＩＤは、非接触型ＩＣタグや非接触型ＩＣラベル、あるいは非接触型ＩＣタグといった様々な形態として用いられ、その用途も様々である。ここで、１３．５６ＭＨｚの周波数帯を用いて通信を行う場合、指向性が広いという利点がある反面、通信距離を長くすることが困難であるという欠点がある。また、２．４５ＧＨｚの周波数帯を用いて通信を行う場合、通信距離を容易に長くすることができるという利点がある反面、指向性が強く、また、アンテナに水分が付着した場合にその影響を受けやすいという欠点がある。   Further, the RF-ID is used in various forms such as a non-contact type IC tag, a non-contact type IC label, or a non-contact type IC tag, and uses thereof are various. Here, when performing communication using the 13.56 MHz frequency band, there is an advantage that the directivity is wide, but there is a disadvantage that it is difficult to increase the communication distance. In addition, when performing communication using the 2.45 GHz frequency band, there is an advantage that the communication distance can be easily increased, but on the other hand, the directivity is strong, and the influence is exerted when moisture adheres to the antenna. There is a drawback that it is easy to receive.

そのため、上述したような利点及び欠点を鑑みて、その用途に応じて、１３．５６ＭＨｚの周波数帯を用いて通信を行うＲＦ−ＩＤと、２．４５ＭＨｚの周波数帯を用いて通信を行うＲＦ−ＩＤとを使い分けることが求められるが、１つのＲＦ−ＩＤに対して複数の周波数を用いて通信を行うことができれば、複数のＲＦ−ＩＤをその用途に応じて使い分ける必要がなくなる。   Therefore, in view of the advantages and disadvantages as described above, depending on the application, RF-ID that performs communication using the 13.56 MHz frequency band and RF-ID that performs communication using the 2.45 MHz frequency band are used. Although it is required to use IDs properly, if communication can be performed using a plurality of frequencies for one RF-ID, there is no need to use a plurality of RF-IDs depending on the application.

また、上述したようなボウタイアンテナを用いた場合は、ＩＣチップに対する情報の書き込み及び読み出しを行うために決められた周波数に対して実際の周波数が多少ずれた場合であってもＩＣチップに対する情報の書き込み及び読み出しを行うことができるものの、１３．５６ＭＨｚと２．４５ＧＨｚというように周波数帯が大きく異なる場合、対応することができない。   Further, when the bow tie antenna as described above is used, even if the actual frequency is slightly deviated from the frequency determined for writing and reading information to and from the IC chip, Although writing and reading can be performed, it is not possible to cope with a case where the frequency bands are greatly different such as 13.56 MHz and 2.45 GHz.

本発明は、上述したような従来の技術が有する問題点に鑑みてなされたものであって、複数の周波数を用いて情報の書き込み及び読み出しが可能なＩＣチップに接続されるＲＦ−ＩＤ用アンテナであって、ＩＣチップにて情報の書き込み及び読み出しが可能な複数の周波数のうち任意の周波数に共振することができるＲＦ−ＩＤ用アンテナを提供することを目的とする。   The present invention has been made in view of the problems of the conventional techniques as described above, and is an RF-ID antenna connected to an IC chip capable of writing and reading information using a plurality of frequencies. An object of the present invention is to provide an RF-ID antenna capable of resonating at an arbitrary frequency among a plurality of frequencies at which information can be written and read by an IC chip.

上記目的を達成するために本発明は、
複数の周波数を用いて情報の書き込み及び読み出しが可能なＩＣチップに接続されるＲＦ−ＩＤ用アンテナであって、
互いに異なる周波数で共振する複数のアンテナ部が、それぞれ前記ＩＣチップに接続可能に同一平面上に形成されている。 In order to achieve the above object, the present invention provides:
An RF-ID antenna connected to an IC chip capable of writing and reading information using a plurality of frequencies,
A plurality of antenna portions that resonate at different frequencies are formed on the same plane so as to be connectable to the IC chip.

また、前記複数のアンテナ部は、ＪＩＳＸ６３０１に規定されるカードサイズ以下の領域に形成されていることを特徴とする。   Further, the plurality of antenna portions are formed in an area of a card size or less defined in JISX6301.

上記のように構成された本発明においては、複数の周波数を用いて情報の書き込み及び読み出しが可能なＩＣチップに対して情報の書き込みあるいは読み出しを行う場合、このＩＣチップに接続されて同一平面上に形成された複数のアンテナ部のうち、情報の書き込みあるいは読み出しを行うための周波数に共振するアンテナ部が共振し、そのアンテナ部を介してＩＣチップに対する情報の書き込みあるいは読み出しが行われる。   In the present invention configured as described above, when information is written to or read from an IC chip capable of writing and reading information using a plurality of frequencies, it is connected to the IC chip and is on the same plane. Among the plurality of antenna portions formed in the antenna portion, an antenna portion that resonates at a frequency for writing or reading information resonates, and information is written to or read from the IC chip via the antenna portion.

以上説明したように本発明においては、複数の周波数を用いて情報の書き込み及び読み出しが可能なＩＣチップに接続されるＲＦ−ＩＤ用アンテナにおいて、互いに異なる周波数で共振する複数のアンテナ部が、それぞれＩＣチップに接続可能に同一平面上に形成されているため、このＩＣチップに対して情報の書き込みあるいは読み出しを行う任意の周波数に共振することができる。   As described above, in the present invention, in an RF-ID antenna connected to an IC chip capable of writing and reading information using a plurality of frequencies, a plurality of antenna units that resonate at different frequencies are respectively provided. Since it is formed on the same plane so as to be connectable to the IC chip, it can resonate with any frequency at which information is written to or read from the IC chip.

また、複数のアンテナ部が、ＪＩＳＸ６３０１に規定されるカードサイズ以下の領域に形成されているものにおいては、このＲＦ−ＩＤ用アンテナを非接触型ＩＣカードに適用することができる。   In addition, in the case where a plurality of antenna portions are formed in an area not larger than the card size defined in JIS X6301, this RF-ID antenna can be applied to a non-contact type IC card.

以下に、本発明の実施の形態について図面を参照して説明する。   Embodiments of the present invention will be described below with reference to the drawings.

図１は、本発明のＲＦ−ＩＤ用アンテナの実施の一形態が適用された非接触型ＩＣタグの構成を示す図である。   FIG. 1 is a diagram showing a configuration of a non-contact IC tag to which an embodiment of an RF-ID antenna of the present invention is applied.

本形態は図１に示すように、樹脂や紙等からなるベース基材１０２上に、導電性材料からなるコイル状のアンテナ部１１１と、アンテナ部１１１を取り囲むように互いに所定の間隔を有して形成された２つのＬ字型の導体１１２ａ，１１２ｂからなるアンテナ部１１２と、アンテナ部１１２の外部にて所定の間隔を有して形成された２つの導体１１３ａ，１１３ｂからなるアンテナ部１１３と、アンテナ部１１１〜１１３に接続された２つのランド部１０３ａ，１０３ｂとが形成され、このランド部１０３ａ，１０３ｂに接続されるようにＩＣチップ１０１が搭載されて構成されている。   As shown in FIG. 1, this embodiment has a coil-shaped antenna unit 111 made of a conductive material on a base substrate 102 made of resin, paper, or the like, and a predetermined interval so as to surround the antenna unit 111. An antenna portion 112 formed of two L-shaped conductors 112a and 112b and an antenna portion 113 formed of two conductors 113a and 113b formed at a predetermined interval outside the antenna portion 112; Two land portions 103a and 103b connected to the antenna portions 111 to 113 are formed, and the IC chip 101 is mounted and connected to the land portions 103a and 103b.

ＩＣチップ１０１は、アンテナ部１１１〜１１３を介して非接触状態にて情報の書き込み及び読み出しが可能に構成されたものであって、１３．５６ＭＨｚ〜２．４５ＧＨｚの周波数に同期するクロックジェネレータ（不図示）が内部に設けられており、アンテナ部１１１〜１１３を介して信号が受信された場合にその信号の周波数に同期したクロックが発生し、このクロックの周波数によって情報の書き込みや読み出しが行われる。   The IC chip 101 is configured to be able to write and read information in a non-contact state via the antenna units 111 to 113, and is a clock generator (non-clocked) synchronized with a frequency of 13.56 MHz to 2.45 GHz. When a signal is received via the antenna units 111 to 113, a clock synchronized with the frequency of the signal is generated, and information is written or read according to the frequency of the clock. .

また、アンテナ部１１１は、コイル形状の内部を通過する磁束によって電流が流れるものであって、１３．５６ＭＨｚの周波数で共振するようにその長さ及び巻き数が設計されている。また、コイル状のパターンの内部から外部に引き出される領域がアンテナ部１１１の他の領域と接触しないように絶縁層１０４が形成されている。   In addition, the antenna unit 111 is configured such that a current flows by a magnetic flux passing through the inside of the coil shape, and the length and the number of turns are designed so as to resonate at a frequency of 13.56 MHz. In addition, the insulating layer 104 is formed so that a region drawn out from the inside of the coiled pattern does not come into contact with other regions of the antenna portion 111.

また、アンテナ部１１２は、所定の幅Ｗ1をそれぞれ有する２つのＬ字型の導体１１２ａ，１１２ｂからなり、２．４５ＧＨｚの周波数で共振するようにその長さが設計されている。このような形状のアンテナにおいては、その長さが、情報の書き込み及び読み出しに用いる周波数ｆaとベース基材１０２の比透磁率及び比誘電率とから求まる波長λの１／２である場合に共振し、ＩＣチップ１０１に対する情報の書き込みや読み出しが可能となる。上述した波長λは、ベース基材１０２の比透磁率をμｓ、ベース基材１０２の比誘電率をεｓとした場合、周波数ｆa及び光速ｃを用いて、λ＝ｃ／（ｆa×（μｓ×εｓ）1/2）によって一義的に求めることができる。そのため、アンテナ部１１２を２．４５ＧＨｚの周波数で共振するものとするためには、アンテナ部１１２の導体１１２ａの端部Ａから端部Ｂ及び導体１１２ｂの端部Ｂ’を通って導体１１２ｂの端部Ａ’までの長さｌ1を、ｌ1＝λ／２＝ｃ／（２×２．４５×１０9×（μｓ×εｓ）1/2）によって算出して設定すれば、ＩＣチップ１０１に対する情報の書き込みや読み出しが可能となる。なお、導体１１２ａ，１１２ｂは、それぞれ所定の幅Ｗ1を有するＬ字型であるため、導体１１２ａの端部Ａから端部Ｂ及び導体１１２ｂの端部Ｂ’を通って導体１１２ｂの端部Ａ’までの長さが、Ｌ字型に折り曲げられた内側と外側とで異なる。そのため、共振する周波数に多少の幅を持たせることができる。 The antenna unit 112 includes two L-shaped conductors 112a each having a predetermined width W 1, consists 112b, its length to resonate at 2.45GHz frequency is designed. In the antenna having such a shape, when the length is a half of the wavelength λ obtained from the relative permeability and the relative dielectric constant of the frequency f a and the base substrate 102 to be used for writing and reading information It resonates and information can be written to and read from the IC chip 101. The above-mentioned wavelength λ is λ = c / (f a × () using the frequency f a and the speed of light c, where the relative permeability of the base substrate 102 is μs and the relative permittivity of the base substrate 102 is εs. μs × εs) 1/2 ). Therefore, in order to resonate the antenna unit 112 at a frequency of 2.45 GHz, the end of the conductor 112b passes from the end A of the conductor 112a of the antenna unit 112 through the end B and the end B ′ of the conductor 112b. If the length l 1 to the part A ′ is calculated and set by l 1 = λ / 2 = c / (2 × 2.45 × 10 9 × (μs × εs) 1/2 ), the IC chip 101 It is possible to write and read information on the. Incidentally, the conductor 112a, 112b, since each is a L-shaped having a predetermined width W 1, the end portion A of the conductor 112b through the end portion B 'of the end portion B and the conductor 112b from the end A of the conductor 112a The length up to 'differs between the inner side and the outer side folded into an L shape. Therefore, the resonance frequency can have a certain width.

また、アンテナ部１１３は、所定の幅Ｗ2をそれぞれ有し、２つの辺が鈍角を挟んで折れ曲がった２つの導体１１３ａ，１１３ｂからなり、９５０ＭＨｚの周波数で共振するようにその長さが設計されている。具体的には、上述したようにベース基材１０２の比透磁率をμｓ、ベース基材１０２の比誘電率をεｓとした場合、アンテナ部１１３の導体１１３ａの端部Ｃから端部Ｄ及び導体１１３ｂの端部Ｄ’を通って導体１１３ｂの端部Ｃ’までの長さｌ2を、ｌ2＝λ／２＝ｃ／（２×９５０×１０6×（μｓ×εｓ）1/2）によって算出して設定すれば、ＩＣチップ１０１に対する情報の書き込みや読み出しが可能となる。なお、導体１１３ａ，１１３ｂは、それぞれ所定の幅Ｗ2を有し、２つの辺が鈍角を挟んで折れ曲がった構成であるため、導体１１３ａの端部Ｃから端部Ｄ及び導体１１３ｂの端部Ｄ’を通って導体１１３ｂの端部Ｃ’までの長さが、鈍角を挟んで折り曲げられた内側と外側とで異なる。そのため、共振する周波数に多少の幅を持たせることができる。 The antenna section 113 has two conductors 113a and 113b each having a predetermined width W2 and two sides bent at an obtuse angle, and the length thereof is designed to resonate at a frequency of 950 MHz. ing. Specifically, as described above, when the relative permeability of the base substrate 102 is μs and the relative permittivity of the base substrate 102 is εs, the end portion C to the end portion D and the conductor of the conductor 113a of the antenna portion 113 are used. The length l 2 from the end D ′ of 113b to the end C ′ of the conductor 113b is defined as l 2 = λ / 2 = c / (2 × 950 × 10 6 × (μs × εs) 1/2 ) If it is calculated and set according to the above, information can be written to and read from the IC chip 101. Incidentally, the conductor 113a, 113b each have a predetermined width W 2, for the two sides a structure in which bent across the obtuse angle end D of the end D and the conductor 113b from the end C of the conductors 113a The length from 'to the end C' of the conductor 113b is different between the inner side and the outer side that are bent across an obtuse angle. Therefore, the resonance frequency can have a certain width.

また、アンテナ部１１２とアンテナ部１１３とは、ランド部１０３ａ，１０３ｂに接続するための領域を除いて、できるだけ離れるように形成されており、それにより、アンテナ部１１２とアンテナ部１１３とが干渉することが回避されている。   Further, the antenna unit 112 and the antenna unit 113 are formed so as to be separated as much as possible except for the area for connecting to the land units 103a and 103b, whereby the antenna unit 112 and the antenna unit 113 interfere with each other. It has been avoided.

以下に、上記のように構成された非接触型ＩＣタグ１００に対する情報の書き込みあるいは読み出し時の動作について説明する。   Hereinafter, an operation at the time of writing or reading of information with respect to the non-contact type IC tag 100 configured as described above will be described.

上述した非接触型ＩＣタグ１００を、１３．５６ＭＨｚの周波数を用いて情報の書き込みあるいは読み出しを行う情報書込／読出装置（不図示）に近接させると、情報書込／読出装置のアンテナ（不図示）と非接触型ＩＣタグ１００のアンテナ部１１１とが共振し、それにより、アンテナ部１１１に電流が流れ、この電流がランド部１０３ａ，１０３ｂを介してＩＣチップ１０１に供給される。ＩＣチップ１０１においては、内部に設けられたクロックジェネレータによって、１３．５６ＭＨｚの周波数に同期するクロックが発生し、それにより、非接触状態において、情報書込／読出装置からアンテナ部１１１を介してＩＣチップ１０１に情報が書き込まれたり、ＩＣチップ１０１に書き込まれた情報がアンテナ部１１１を介して情報書込／読出装置にて読み出されたりする。   When the contactless IC tag 100 described above is brought close to an information writing / reading device (not shown) that writes or reads information using a frequency of 13.56 MHz, the antenna (not shown) of the information writing / reading device is used. The antenna unit 111 of the non-contact type IC tag 100 resonates, whereby a current flows through the antenna unit 111, and this current is supplied to the IC chip 101 via the land units 103a and 103b. In the IC chip 101, a clock synchronized with a frequency of 13.56 MHz is generated by a clock generator provided in the IC chip 101. Thus, in a non-contact state, the IC is connected from the information writing / reading device via the antenna unit 111 to the IC. Information is written to the chip 101, and information written to the IC chip 101 is read out by the information writing / reading device via the antenna unit 111.

また、上述した非接触型ＩＣタグ１００を、２．４５ＧＨｚの周波数を用いて情報の書き込みあるいは読み出しを行う情報書込／読出装置（不図示）に近接させると、情報書込／読出装置のアンテナ（不図示）と非接触型ＩＣタグ１００のアンテナ部１１２とが共振し、それにより、アンテナ部１１２に電流が流れ、この電流がランド部１０３ａ，１０３ｂを介してＩＣチップ１０１に供給される。ＩＣチップ１０１においては、内部に設けられたクロックジェネレータによって、２．４５ＧＨｚの周波数に同期するクロックが発生し、それにより、非接触状態において、情報書込／読出装置からアンテナ部１１２を介してＩＣチップ１０１に情報が書き込まれたり、ＩＣチップ１０１に書き込まれた情報がアンテナ部１１２を介して情報書込／読出装置にて読み出されたりする。   Further, when the contactless IC tag 100 described above is brought close to an information writing / reading device (not shown) that writes or reads information using a frequency of 2.45 GHz, an antenna of the information writing / reading device is used. (Not shown) and the antenna portion 112 of the non-contact type IC tag 100 resonate, whereby a current flows through the antenna portion 112, and this current is supplied to the IC chip 101 via the land portions 103a and 103b. In the IC chip 101, a clock that is synchronized with a frequency of 2.45 GHz is generated by a clock generator provided in the IC chip 101, so that, in a non-contact state, the IC is provided from the information writing / reading device via the antenna unit 112. Information is written to the chip 101, and information written to the IC chip 101 is read out by the information writing / reading device via the antenna unit 112.

また、上述した非接触型ＩＣタグ１００を、９５０ＭＨｚの周波数を用いて情報の書き込みあるいは読み出しを行う情報書込／読出装置（不図示）に近接させると、情報書込／読出装置のアンテナ（不図示）と非接触型ＩＣタグ１００のアンテナ部１１３とが共振し、それにより、アンテナ部１１３に電流が流れ、この電流がランド部１０３ａ，１０３ｂを介してＩＣチップ１０１に供給される。ＩＣチップ１０１においては、内部に設けられたクロックジェネレータによって、９５０ＭＨｚの周波数に同期するクロックが発生し、それにより、非接触状態において、情報書込／読出装置からアンテナ部１１３を介してＩＣチップ１０１に情報が書き込まれたり、ＩＣチップ１０１に書き込まれた情報がアンテナ部１１３を介して情報書込／読出装置にて読み出されたりする。   Further, when the contactless IC tag 100 described above is brought close to an information writing / reading device (not shown) that writes or reads information using a frequency of 950 MHz, the antenna (not shown) of the information writing / reading device is used. The antenna portion 113 of the non-contact type IC tag 100 resonates, whereby a current flows through the antenna portion 113, and this current is supplied to the IC chip 101 via the land portions 103a and 103b. In the IC chip 101, a clock that is synchronized with a frequency of 950 MHz is generated by a clock generator provided in the IC chip 101, so that, in a non-contact state, the IC chip 101 from the information writing / reading device via the antenna unit 113 is generated. Information is written to the IC chip 101, or information written to the IC chip 101 is read out by the information writing / reading device via the antenna unit 113.

上述したように、本形態においては、１３．５６ＭＨｚの周波数で共振するアンテナ部１１１と、２．４５ＧＨｚの周波数で共振するアンテナ部１１２と、９５０ＭＨｚの周波数で共振するアンテナ部１１３とが同一平面となるベース基材１０２上に形成されており、ランド部１０３ａ，１０３ｂを介してこれらの全てに接続されるようにＩＣチップ１０１がベース基材１０１上に搭載されているため、１３．５６ＭＨｚの周波数を用いて情報の書き込みあるいは読み出しを行う情報書込／読出装置に近接させた場合、情報書込／読出装置のアンテナと非接触型ＩＣタグ１００のアンテナ部１１１とが共振し、また、２．４５ＧＨｚの周波数を用いて情報の書き込みあるいは読み出しを行う情報書込／読出装置に近接させた場合、情報書込／読出装置のアンテナと非接触型ＩＣタグ１００のアンテナ部１１２とが共振し、また、９５０ＭＨｚの周波数を用いて情報の書き込みあるいは読み出しを行う情報書込／読出装置に近接させた場合、情報書込／読出装置のアンテナと非接触型ＩＣタグ１００のアンテナ部１１３とが共振することになり、それにより、複数の周波数を用いて情報の書き込み及び読み出しが可能なＩＣチップ１０１に対して、アンテナ部１１１〜１１３が共振する３つの周波数のうちいずれかの周波数を用いて情報の書き込みあるいは読み出しを行うことができる。   As described above, in this embodiment, the antenna unit 111 that resonates at a frequency of 13.56 MHz, the antenna unit 112 that resonates at a frequency of 2.45 GHz, and the antenna unit 113 that resonates at a frequency of 950 MHz are in the same plane. Since the IC chip 101 is mounted on the base substrate 101 so as to be connected to all of these via the land portions 103a and 103b, the frequency is 13.56 MHz. 2, the antenna of the information writing / reading device and the antenna unit 111 of the non-contact type IC tag 100 resonate, and 2. When the information writing / reading device for writing or reading information using a frequency of 45 GHz is used, the information writing / reading When the antenna of the output device and the antenna portion 112 of the non-contact type IC tag 100 resonate, and when the information writing / reading device for writing or reading information using a frequency of 950 MHz is used, the information writing The antenna of the reading device and the antenna unit 113 of the non-contact type IC tag 100 resonate, so that the antenna unit can be compared with the IC chip 101 that can write and read information using a plurality of frequencies. Information can be written or read using any one of the three frequencies at which 111 to 113 resonate.

（他の実施の形態）
なお、本発明は、上述した実施の形態にて示したように、互いに異なる周波数で共振する３つのアンテナ部１１１〜１１３を設け、アンテナ部１１１〜１１３が共振する３つの周波数のうちいずれかの周波数を用いてＩＣチップ１０１に対して情報の書き込みあるいは読み出しを行うものに限らず、互いに異なる周波数で共振する２つ、あるいはそれ以外の数のアンテナ部からなるものも考えられる。 (Other embodiments)
In the present invention, as shown in the above-described embodiment, three antenna portions 111 to 113 that resonate at different frequencies are provided, and any one of the three frequencies at which the antenna portions 111 to 113 resonate is provided. It is not limited to writing / reading information to / from the IC chip 101 using the frequency, but may also be formed of two or other numbers of antenna units that resonate at different frequencies.

図２は、本発明のＲＦ−ＩＤ用アンテナの他の実施の形態が適用された非接触型ＩＣタグの構成を示す図である。   FIG. 2 is a diagram showing a configuration of a non-contact type IC tag to which another embodiment of the RF-ID antenna of the present invention is applied.

本形態は図２に示すように、樹脂や紙等からなるベース基材２０２上に、導電性材料からなるコイル状のアンテナ部２１１と、アンテナ部２１１を取り囲むように互いに所定の間隔を有して形成された２つのＬ字型の導体２１２ａ，２１２ｂからなるアンテナ部２１２と、アンテナ部２１１，２１２に接続された２つのランド部２０３ａ，２０３ｂとが形成され、このランド部２０３ａ，２０３ｂに接続されるようにＩＣチップ２０１が搭載されて構成されている。なお、アンテナ部２１１は、１３．５６ＭＨｚの周波数で共振するようにその長さ及び巻き数が設計されており、また、アンテナ部２１２は、２．４５ＧＨｚの周波数で共振するようにその長さが設計されている。   In this embodiment, as shown in FIG. 2, a coil-shaped antenna section 211 made of a conductive material is provided on a base substrate 202 made of resin, paper, or the like, and has a predetermined interval so as to surround the antenna section 211. The antenna portion 212 formed of the two L-shaped conductors 212a and 212b and the two land portions 203a and 203b connected to the antenna portions 211 and 212 are formed and connected to the land portions 203a and 203b. As described above, the IC chip 201 is mounted. Note that the length and the number of turns of the antenna unit 211 are designed so as to resonate at a frequency of 13.56 MHz, and the length of the antenna unit 212 so as to resonate at a frequency of 2.45 GHz. Designed.

このような構成とすることにより、１３．５６ＭＨｚの周波数を用いて情報の書き込みあるいは読み出しを行う情報書込／読出装置に近接させた場合、情報書込／読出装置のアンテナと非接触型ＩＣタグ２００のアンテナ部２１１とが共振し、また、２．４５ＧＨｚの周波数を用いて情報の書き込みあるいは読み出しを行う情報書込／読出装置に近接させた場合、情報書込／読出装置のアンテナと非接触型ＩＣタグ２００のアンテナ部２１２とが共振することになり、それにより、複数の周波数を用いて情報の書き込み及び読み出しが可能なＩＣチップ２０１に対して、アンテナ部２１１，２１２が共振する２つの周波数のうちいずれかの周波数を用いて情報の書き込みあるいは読み出しを行うことができる。   By adopting such a configuration, when the information writing / reading device for writing or reading information using a frequency of 13.56 MHz is placed close to the antenna, the antenna of the information writing / reading device and the non-contact IC tag 200 antenna unit 211 resonates, and when close to an information writing / reading device that writes or reads information using a frequency of 2.45 GHz, it does not contact the antenna of the information writing / reading device. The antenna unit 212 of the type IC tag 200 resonates, and the antenna units 211 and 212 resonate with respect to the IC chip 201 that can write and read information using a plurality of frequencies. Information can be written or read using any one of the frequencies.

図３は、本発明のＲＦ−ＩＤ用アンテナの他の実施の形態が適用された非接触型ＩＣタグの構成を示す図である。   FIG. 3 is a diagram showing a configuration of a non-contact type IC tag to which another embodiment of the RF-ID antenna of the present invention is applied.

本形態は図３に示すように、樹脂や紙等からなるベース基材３０２上に、導電性材料からなるコイル状のアンテナ部３１１と、互いに所定の間隔を有して形成された２つのＬ字型の導体３１３ａ，３１３ｂからなるアンテナ部３１３と、アンテナ部３１１，３１３に接続された２つのランド部３０３ａ，３０３ｂとが形成され、このランド部３０３ａ，３０３ｂに接続されるようにＩＣチップ３０１が搭載されて構成されている。なお、アンテナ部３１１は、１３．５６ＭＨｚの周波数で共振するようにその長さ及び巻き数が設計されており、また、アンテナ部３１３は、９５０ＭＨｚの周波数で共振するようにその長さが設計されている。   In this embodiment, as shown in FIG. 3, on a base substrate 302 made of resin, paper or the like, a coiled antenna portion 311 made of a conductive material and two L formed with a predetermined distance from each other. An antenna portion 313 made up of letter-shaped conductors 313a and 313b and two land portions 303a and 303b connected to the antenna portions 311 and 313 are formed, and the IC chip 301 is connected to the land portions 303a and 303b. Is installed and configured. The length and number of turns of the antenna unit 311 are designed so as to resonate at a frequency of 13.56 MHz, and the length of the antenna unit 313 is designed so as to resonate at a frequency of 950 MHz. ing.

このような構成とすることにより、１３．５６ＭＨｚの周波数を用いて情報の書き込みあるいは読み出しを行う情報書込／読出装置に近接させた場合、情報書込／読出装置のアンテナと非接触型ＩＣタグ３００のアンテナ部３１１とが共振し、また、９５０ＭＨｚの周波数を用いて情報の書き込みあるいは読み出しを行う情報書込／読出装置に近接させた場合、情報書込／読出装置のアンテナと非接触型ＩＣタグ３００のアンテナ部３１３とが共振することになり、それにより、複数の周波数を用いて情報の書き込み及び読み出しが可能なＩＣチップ３０１に対して、アンテナ部３１１，３１３が共振する２つの周波数のうちいずれかの周波数を用いて情報の書き込みあるいは読み出しを行うことができる。   By adopting such a configuration, when the information writing / reading device for writing or reading information using a frequency of 13.56 MHz is placed close to the antenna, the antenna of the information writing / reading device and the non-contact IC tag When the antenna unit 311 of 300 resonates and is close to an information writing / reading device that writes or reads information using a frequency of 950 MHz, the antenna of the information writing / reading device and the non-contact IC The antenna unit 313 of the tag 300 resonates, so that two frequencies of the antenna units 311 and 313 resonate with respect to the IC chip 301 that can write and read information using a plurality of frequencies. Information can be written or read using any one of the frequencies.

なお、上述した実施の形態においては、本発明のＲＦ−ＩＤ用アンテナが非接触型ＩＣタグ１００，２００，３００に適用された場合を例に挙げて説明したが、非接触型ＩＣタグに限らず、非接触型ＩＣカードや非接触型ＩＣラベルについても本発明を適用することができる。例えば、図１に示したアンテナ部１１１〜１１３、図２に示したアンテナ部２１１，２１２、図３に示したアンテナ部３１１，３１３を、ＪＩＳＸ６３０１で規定されるカードサイズ以下の領域に形成しておけば、図１〜図３に示したようなＲＦ−ＩＤ用アンテナを非接触型ＩＣカードに適用することができる。   In the above-described embodiment, the case where the RF-ID antenna of the present invention is applied to the non-contact type IC tags 100, 200, and 300 has been described as an example. However, the present invention is not limited to the non-contact type IC tag. In addition, the present invention can be applied to non-contact type IC cards and non-contact type IC labels. For example, the antenna units 111 to 113 shown in FIG. 1, the antenna units 211 and 212 shown in FIG. 2, and the antenna units 311 and 313 shown in FIG. 3 are formed in an area of a card size or less stipulated by JISX6301. If so, the RF-ID antenna as shown in FIGS. 1 to 3 can be applied to a non-contact type IC card.

本発明のＲＦ−ＩＤ用アンテナの実施の一形態が適用された非接触型ＩＣタグの構成を示す図である。It is a figure which shows the structure of the non-contact-type IC tag to which one Embodiment of the antenna for RF-ID of this invention was applied. 本発明のＲＦ−ＩＤ用アンテナの他の実施の形態が適用された非接触型ＩＣタグの構成を示す図である。It is a figure which shows the structure of the non-contact-type IC tag to which other embodiment of the antenna for RF-ID of this invention was applied. 本発明のＲＦ−ＩＤ用アンテナの他の実施の形態が適用された非接触型ＩＣタグの構成を示す図である。It is a figure which shows the structure of the non-contact-type IC tag to which other embodiment of the antenna for RF-ID of this invention was applied. 従来の非接触型ＩＣタグの一例を示す図である。It is a figure which shows an example of the conventional non-contact-type IC tag. ２．４５ＧＨｚの周波数帯を利用して通信を行うＩＣチップが搭載された非接触型ＩＣタグの一例を示す図である。It is a figure which shows an example of the non-contact-type IC tag by which the IC chip which communicates using a 2.45 GHz frequency band is mounted. 一般的なボウタイアンテナを有する非接触型ＩＣタグの一例を示す図である。It is a figure which shows an example of the non-contact-type IC tag which has a general bow-tie antenna.

符号の説明Explanation of symbols

１００，２００ 非接触型ＩＣタグ
１０１，２０１，３０１ ＩＣチップ
１０２，２０２，３０２ ベース基材
１０３ａ，１０３ｂ，２０３ａ，２０３ｂ，３０３ａ，３０３ｂ ランド部
１０４，２０４，３０４ 絶縁層
１１１，１１２，１１３，２１１，２１２，２１３，３１１，３１２，３１３ アンテナ部
１１２ａ，１１２ｂ，２１２ａ，２１２ｂ，３１２ａ，３１２ｂ 導体 100, 200 Non-contact type IC tag 101, 201, 301 IC chip 102, 202, 302 Base substrate 103a, 103b, 203a, 203b, 303a, 303b Land part 104, 204, 304 Insulating layer 111, 112, 113, 211 , 212, 213, 311, 312, 313 Antenna portion 112a, 112b, 212a, 212b, 312a, 312b Conductor

Claims (2)

複数の周波数を用いて情報の書き込み及び読み出しが可能なＩＣチップに接続されるＲＦ−ＩＤ用アンテナであって、
互いに異なる周波数で共振する複数のアンテナ部が、それぞれ前記ＩＣチップに接続可能に同一平面上に形成されたＲＦ−ＩＤ用アンテナ。 An RF-ID antenna connected to an IC chip capable of writing and reading information using a plurality of frequencies,
An RF-ID antenna in which a plurality of antenna portions that resonate at different frequencies are formed on the same plane so as to be connectable to the IC chip. 請求項１に記載のＲＦ−ＩＤ用アンテナにおいて、
前記複数のアンテナ部は、ＪＩＳＸ６３０１に規定されるカードサイズ以下の領域に形成されていることを特徴とするＲＦ−ＩＤ用アンテナ。 The RF-ID antenna according to claim 1,
The antenna for RF-ID, wherein the plurality of antenna portions are formed in an area not larger than a card size defined in JIS X6301.
JP2004062751A 2004-03-05 2004-03-05 Antenna for rf-id Pending JP2005252853A (en)

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