JP2008177739A - Attachment for rfid tag and directivity-changeable rfid tag - Google Patents

Attachment for rfid tag and directivity-changeable rfid tag Download PDF

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JP2008177739A
JP2008177739A JP2007007882A JP2007007882A JP2008177739A JP 2008177739 A JP2008177739 A JP 2008177739A JP 2007007882 A JP2007007882 A JP 2007007882A JP 2007007882 A JP2007007882 A JP 2007007882A JP 2008177739 A JP2008177739 A JP 2008177739A
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rfid tag
attachment
base plate
directivity
tag
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Atsuo Chiga
敦夫 千賀
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Nippon Signal Co Ltd
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Nippon Signal Co Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To provide an attachment for an RFID tag capable of easily changing the directivity of the RFID tag, and a directivity-changeable RFID tag capable of easily having desired directivity. <P>SOLUTION: Disclosed are the attachment for the RFID tag which has a base plate 2 previously marked with a tag fitting position 2A for fitting the RFID tag 4, an antenna element 3A and a passive element 3B, and also has a parasitic element 3 previously provided on the base plate 2 so as to generate an electromagnetic field to interfere with an electromagnetic field produced by the RFID tag 4 when the RFID tag 4 is fitted at the tag fitting position 2A; and the directivity-changeable RFID tag formed using the attachment. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

本発明は、非接触で情報の読み書きができるＲＦＩＤ（Ｒａｄｉｏ ｆｒｅｑｕｅｎｃｙ ｉｄｅｎｔｉｆｉｃａｔｉｏｎ）タグ用のアタッチメントに関し、特に、ＲＦＩＤタグの指向性を容易に可変できるＲＦＩＤタグ用アタッチメントに関する。また、このアタッチメントを備えて容易に所望の指向性を得ることができる指向性可変ＲＦＩＤタグに関する。   The present invention relates to an attachment for an RFID (Radio frequency identification) tag that can read and write information without contact, and more particularly to an attachment for an RFID tag that can easily change the directivity of the RFID tag. The present invention also relates to a directivity variable RFID tag that can be easily obtained with a desired directivity by including this attachment.

近年、外部機器との間で無線通信を用いて非接触で情報のやり取りが可能なＲＦＩＤタグが提案されている（例えば、特許文献１参照）。このようなＲＦＩＤタグは、物品等に貼り付けてその物品に関する情報を外部機器との間でやり取りすることで、物品の識別、管理等を行うために利用される。このＲＦＩＤタグは、一般的にプリント形成されたアンテナにＩＣチップを実装する方法で製造され、そのアンテナはダイポールアンテナ若しくはそれに類似する形状のものが多く、その指向性は、一般的に「８の字指向性」と言われるダイポールアンテナに近い。
特開２００６−２９５８７９号公報 In recent years, an RFID tag has been proposed that can exchange information with an external device in a contactless manner using wireless communication (see, for example, Patent Document 1). Such an RFID tag is used to identify and manage an article by attaching it to an article and exchanging information about the article with an external device. This RFID tag is generally manufactured by a method of mounting an IC chip on a printed antenna, and the antenna is often a dipole antenna or a similar shape, and its directivity is generally “8. It is close to a dipole antenna called “character directivity”.
JP 2006-295879 A

ところで、ＲＦＩＤタグの用途によっては、ある一方若しくは複数の方向に強い指向性が望まれることがあり、その方向はタグの貼付面に対して接線方向や法線方向など用途により様々である。しかしながら、ＲＦＩＤタグは上述のような方法で製造されているため、ユーザーがＲＦＩＤタグのアンテナに手を加えることは困難であり、ＲＦＩＤタグの指向性を用途に合わせて変更することができない。このため、ＲＦＩＤタグに所望する指向性を持たせるためには、従来ではその指向性が得られるよう設計したアンテナを持つＲＦＩＤタグを別途製造する必要があった。   By the way, depending on the use of the RFID tag, strong directivity in one or a plurality of directions may be desired, and the direction varies depending on the use such as a tangential direction and a normal direction with respect to the tag attachment surface. However, since the RFID tag is manufactured by the above-described method, it is difficult for the user to modify the RFID tag antenna, and the directivity of the RFID tag cannot be changed according to the application. For this reason, in order to give a desired directivity to the RFID tag, conventionally, it has been necessary to separately manufacture an RFID tag having an antenna designed to obtain the directivity.

本発明は上記問題点に着目してなされたもので、ＲＦＩＤ用タグの指向性を容易に可変できるＲＦＩＤタグ用アタッチメントを提供することを目的とする。また、所望の指向性を容易に得ることが可能な指向性可変ＲＦＩＤタグを提供することを目的とする。   The present invention has been made paying attention to the above problems, and an object thereof is to provide an attachment for an RFID tag that can easily change the directivity of the RFID tag. It is another object of the present invention to provide a directivity variable RFID tag that can easily obtain desired directivity.

このため、請求項１の発明のＲＦＩＤタグ用アタッチメントは、ＲＦＩＤタグを取付けるためのタグ取付け位置を予め印したベースプレートと、少なくともアンテナエレメントを有し、前記タグ取付け位置にＲＦＩＤタグを取付けた時にＲＦＩＤタグから生じる電磁界と互いに干渉する電磁界を生じるよう前記ベースプレート上に予め設けた無給電素子と、を備えて構成したことを特徴とする。   For this reason, the RFID tag attachment of the invention of claim 1 has a base plate preliminarily marked with a tag mounting position for mounting the RFID tag and at least an antenna element, and the RFID tag is mounted when the RFID tag is mounted at the tag mounting position. A parasitic element provided in advance on the base plate so as to generate an electromagnetic field that interferes with an electromagnetic field generated from the tag is provided.

かかる構成では、ベースプレートに印された位置に既存のＲＦＩＤタグを取付けてＲＦＩＤタグを動作させると、タグに流れる電流に起因して無給電素子にも電流が発生し、タグで生じる電磁界とベースプレートに予め設けた無給電素子で生じる電磁界とによる合成電磁界でＲＦＩＤタグの指向性が決定される。これにより、ＲＦＩＤタグをベースプレートに取付けるだけでその指向性を可変できるようになる。   In such a configuration, when an existing RFID tag is attached to the position marked on the base plate and the RFID tag is operated, a current is also generated in the parasitic element due to the current flowing through the tag, and the electromagnetic field generated in the tag and the base plate The directivity of the RFID tag is determined by a combined electromagnetic field generated by an electromagnetic field generated by a parasitic element provided in advance. As a result, the directivity can be varied simply by attaching the RFID tag to the base plate.

請求項２のように、前記ベースプレートは、前記無給電素子を追加取付け可能な構成で、追加する無給電素子の取付け状態が予め印されているようにするとよい。
かかる構成では、ベースプレートに予め印された取付け状態で無給電素子を追加するだけで、ＲＦＩＤタグの指向性を変更することができるようになる。 According to a second aspect of the present invention, the base plate may be configured such that the parasitic element can be additionally attached, and the attachment state of the parasitic element to be added may be marked in advance.
In such a configuration, the directivity of the RFID tag can be changed only by adding a parasitic element in an attached state pre-marked on the base plate.

請求項３のように、前記無給電素子の前記アンテナエレメントが、長さ調整可能に予め形成されているとよい。
かかる構成では、無給電素子の前記アンテナエレメントの長さを容易に調整してＲＦＩＤタグの指向性を変更することができるようになる。 It is preferable that the antenna element of the parasitic element is formed in advance so as to be adjustable in length.
With such a configuration, the directivity of the RFID tag can be changed by easily adjusting the length of the antenna element of the parasitic element.

請求項４のように、前記ベースプレートに、前記無給電素子の取付け状態と該取付け状態に応じたＲＦＩＤタグの指向性方向との対応関係を示す構成とするとよい。
かかる構成では、無給電素子の取付け状態とＲＦＩＤタグの指向性方向との対応関係を容易に知ることができ、誰でも簡単にＲＦＩＤタグの指向性を所望のものに可変設定できるようになる。 According to a fourth aspect of the present invention, the base plate may be configured to indicate a correspondence relationship between the attachment state of the parasitic element and the directivity direction of the RFID tag according to the attachment state.
With this configuration, the correspondence between the attachment state of the parasitic element and the directivity direction of the RFID tag can be easily known, and anyone can easily set the directivity of the RFID tag to a desired value.

請求項５のように、前記ベースプレートをプリント基板材で形成し、該プリント基板材上に前記無給電素子のアンテナエレメントのパターンをエッチング加工で形成する構成とするとよい。   It is preferable that the base plate is formed of a printed board material, and the antenna element pattern of the parasitic element is formed on the printed board material by etching.

請求項６のように、前記無給電素子は、前記アンテナエレメントと電気的に接続する受動素子を備える構成とするとよい。
かかる構成では、無給電素子のアンテナエレメント形状が制約される場合でも、無給電素子のインピーダンスを受動素子で調整して適正なインピーダンスを得ることができるようになる。 According to a sixth aspect of the present invention, the parasitic element may include a passive element that is electrically connected to the antenna element.
In such a configuration, even when the shape of the antenna element of the parasitic element is restricted, an appropriate impedance can be obtained by adjusting the impedance of the parasitic element with the passive element.

請求項７の発明の指向性可変ＲＦＩＤタグは、請求項１〜６のいずれか１つに記載のアタッチメントにおけるベースプレート上のタグ取付け位置に、アンテナ及び該アンテナを介して無線通信を行うＩＣチップを備えたＲＦＩＤ用タグ部を一体的に設けて構成したことを特徴とする。
かかる構成では、ベースプレート上の無給電素子の取付け状態を選択することによって、ＲＦＩＤタグ部の指向性を容易に可変できるようになり、用途に応じた指向性を容易に得ることができるようになる。 A directivity variable RFID tag according to a seventh aspect of the present invention includes an antenna and an IC chip that performs wireless communication via the antenna at a tag mounting position on the base plate in the attachment according to any one of the first to sixth aspects. The RFID tag portion provided is integrally provided and configured.
In such a configuration, by selecting the attachment state of the parasitic element on the base plate, the directivity of the RFID tag portion can be easily changed, and the directivity according to the application can be easily obtained. .

本発明のＲＦＩＤタグ用アタッチメントによれば、ベースプレート上に予め印されたタグ取付け位置にＲＦＩＤタグ自体を何ら加工することなく単に取付けるだけで簡単にＲＦＩＤタグタグの指向性を変えることができる。従って、１種類のＲＦＩＤタグで用途に応じた様々な指向性を得ることが可能であり、用途に応じて異なる指向性を持つＲＦＩＤタグを製造する必要がなくなる。   According to the RFID tag attachment of the present invention, the directivity of the RFID tag can be easily changed by simply attaching the RFID tag itself to the tag attachment position marked on the base plate without any processing. Therefore, it is possible to obtain various directivities according to applications with one type of RFID tag, and it is not necessary to manufacture RFID tags having different directivities according to the applications.

また、本発明の指向性可変タグによれば、ベースプレート上に取付ける無給電素子の数や配置等を選択するだけで１つのタグで様々な指向性を得ることができるので、用途に応じた指向性を持つＲＦＩＤタグをそれぞれ製造する必要がなくなる。   In addition, according to the directivity variable tag of the present invention, it is possible to obtain various directivities with one tag simply by selecting the number and arrangement of parasitic elements to be mounted on the base plate. It is no longer necessary to manufacture each RFID tag having the characteristics.

以下、本発明の実施形態を図面に基づいて説明する。
図１は、本発明のＲＦＩＤタグ用アタッチメントの第１実施形態を示す構成図である。
図１において、本実施形態のＲＦＩＤタグ用アタッチメント１は、ベースプレート２と、無給電素子３とを備えて構成され、ベースプレート２にＲＦＩＤタグ４を取付けてＲＦＩＤタグ４の指向性を所望の方向に可変するものである。
前記ベースプレート２には、図中破線で示すように、ＲＦＩＤタグ４を取付けるためのタグ取付け位置２Ａが予め印されており、このタグ取付け位置２ＡにＲＦＩＤタグ４が取付けられるよう構成されている。ベースプレート２としては、例えばプリント基板材や樹脂シート等が考えられる。 Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a block diagram showing a first embodiment of an RFID tag attachment according to the present invention.
In FIG. 1, an RFID tag attachment 1 according to this embodiment includes a base plate 2 and a parasitic element 3, and the RFID tag 4 is attached to the base plate 2 so that the directivity of the RFID tag 4 is set in a desired direction. It is variable.
The base plate 2 is preliminarily marked with a tag attachment position 2A for attaching the RFID tag 4 as indicated by a broken line in the figure, and the RFID tag 4 is attached to the tag attachment position 2A. As the base plate 2, for example, a printed board material or a resin sheet can be considered.

前記無給電素子３は、ベースプレート２上のタグ取付け位置２ＡにＲＦＩＤタグ４を取付けて動作させた時にＲＦＩＤタグ４から生じる電磁界と互いに干渉する電磁界を生じるようベースプレート２上に予め設けられる。無給電素子３は、金属、誘電体或いは金属と誘電体の両方からなるアンテナエレメント３Ａと、該アンテナエレメント３Ａと電気的に接続した受動素子（抵抗、コンデンサ、インダクタ等）３Ｂとからなり、ＲＦＩＤタグ４の所望する指向性次第で、その形状、取付け位置、数等は異なり、また、受動素子３Ｂも設けなくてもよい。   The parasitic element 3 is provided in advance on the base plate 2 so as to generate an electromagnetic field that interferes with an electromagnetic field generated from the RFID tag 4 when the RFID tag 4 is mounted and operated at the tag mounting position 2A on the base plate 2. The parasitic element 3 includes an antenna element 3A made of metal, dielectric, or both metal and dielectric, and a passive element (resistor, capacitor, inductor, etc.) 3B electrically connected to the antenna element 3A. Depending on the directivity desired by the tag 4, its shape, mounting position, number, and the like are different, and the passive element 3B may not be provided.

ＲＦＩＤタグ４は、アンテナ４Ａと、このアンテナ４Ａを介して無線通信を行うＩＣチップ４Ｂを、例えば樹脂部材４Ｃで覆って形成されたもので、ＲＦＩＤタグ４単体の指向性は、一般的に「８の字指向性」と言われるダイポールアンテナに近いものである。   The RFID tag 4 is formed by covering an antenna 4A and an IC chip 4B that performs wireless communication via the antenna 4A with, for example, a resin member 4C. The directivity of the RFID tag 4 itself is generally “ It is close to a dipole antenna called “8-shaped directivity”.

ＲＦＩＤタグ用アタッチメント１の形態としては、例えばプリント基板材をベースプレート２としてその表面に金属薄膜を形成してアンテナエレメントをパターニングし、エッチング加工して無給電素子３の金属のアンテナエレメント３Ａをベースプレート２上に形成したものや、樹脂シートをベースプレート２として無給電素子３の金属のアンテナエレメント３Ａを印刷加工してベースプレート２上に形成したもの等が考えられる。   As a form of the RFID tag attachment 1, for example, a printed circuit board material is used as a base plate 2, a metal thin film is formed on the surface thereof, an antenna element is patterned, and etched to process the metal antenna element 3 A of the parasitic element 3 as a base plate 2. The one formed above, the one formed on the base plate 2 by printing the metal antenna element 3A of the parasitic element 3 using the resin sheet as the base plate 2, and the like can be considered.

ここで、図２を参照して本発明のＲＦＩＤタグ用アタッチメントによるＲＦＩＤタグ４の指向性制御の原理を簡単に説明する。
図中、Ｚ１とＺ２は、ベースプレート２上に配置した無給電素子３，３の自己インピーダンスを示し、Ｚ０は、ベースプレート２のタグ取付け位置２Ａに取付けるＲＦＩＤタグ４の自己インピーダンスを示す。ＲＦＩＤタグ４が外部機器からの電波を受信してＲＦＩＤタグ４の電気回路に電流Ｉ０が流れると電磁界が発生する。この電磁界がＲＦＩＤタグ４の近傍に存在する無給電素子３，３に作用して無給電素子３，３に起電力Ｖ１，Ｖ２が誘起され、ＲＦＩＤタグ４と各無給電素子３，３間の相互インピーダンスＺ０１，Ｚ０２に応じて無給電素子３，３に電流Ｉ１，Ｉ２が流れる。無給電素子３，３に電流Ｉ１，Ｉ２が流れると、無給電素子３，３に電磁界が発生し、ＲＦＩＤタグ４の電磁界と無給電素子３，３の電磁界を合成した電磁界によりＲＦＩＤタグ４の指向性が決定される。 Here, the principle of directivity control of the RFID tag 4 by the RFID tag attachment of the present invention will be briefly described with reference to FIG.
In the figure, Z1 and Z2 indicate the self-impedance of the parasitic elements 3 and 3 disposed on the base plate 2, and Z0 indicates the self-impedance of the RFID tag 4 attached to the tag attachment position 2A of the base plate 2. When the RFID tag 4 receives a radio wave from an external device and a current I0 flows through the electric circuit of the RFID tag 4, an electromagnetic field is generated. This electromagnetic field acts on the parasitic elements 3 and 3 existing in the vicinity of the RFID tag 4 to induce electromotive forces V1 and V2 in the parasitic elements 3 and 3, and the RFID tag 4 and each parasitic element 3 and 3 are connected. Currents I1 and I2 flow through the parasitic elements 3 and 3 in accordance with the mutual impedances Z01 and Z02. When the currents I1 and I2 flow through the parasitic elements 3 and 3, an electromagnetic field is generated in the parasitic elements 3 and 3, and the electromagnetic field of the RFID tag 4 and the electromagnetic field of the parasitic elements 3 and 3 are combined. The directivity of the RFID tag 4 is determined.

図１に示す本実施形態のＲＦＩＤタグ用アタッチメント１では、タグ取付け位置２Ａを挟んでアンテナエレメント２Ａの長さが異なる２つの無給電素子を配置した構成であり、かかる構成では、前記ＲＦＩＤタグ４をタグ取付け位置２Ａに取付けると、ＲＦＩＤタグ４からの電波の指向性はアンテナエレメント３Ａの長さが短い無給電素子３の方、即ち図１の右方向となり、ＲＦＩＤタグ用アタッチメント１に取付けない場合のＲＦＩＤタグ４本来の指向性とは異なる指向性に可変できる。   The RFID tag attachment 1 of the present embodiment shown in FIG. 1 has a configuration in which two parasitic elements having different antenna element 2A lengths are arranged across a tag mounting position 2A. In such a configuration, the RFID tag 4 Is attached to the tag attachment position 2A, the directivity of the radio wave from the RFID tag 4 becomes the parasitic element 3 having the shorter antenna element 3A, that is, the right direction in FIG. 1, and is not attached to the RFID tag attachment 1. In this case, the directivity different from the original directivity of the RFID tag 4 can be changed.

かかる構成のＲＦＩＤタグ用アタッチメント１によれば、ベースプレート２上に予め印されたタグ取付け位置２Ａに、ＲＦＩＤタグ４自体を何ら加工することなく単に取付けるだけで簡単にＲＦＩＤタグタグ４の指向性を変えることができる。従って、１種類のＲＦＩＤタグ４で用途に応じた様々な指向性を得ることが可能となり、用途に応じて異なる指向性を持つＲＦＩＤタグをそれぞれ製造する必要がなくなる。また、タグ取付け位置２ＡへのＲＦＩＤタグの取付けが着脱可能に構成することで、ＲＦＩＤタグ用アタッチメント１の再利用ができるので、省資源化を図ることができる。また、無給電素子３に受動素子３Ｂを設けることにより、無給電素子３のアンテナエレメント３Ａの形状が制約される場合に、無給電素子３のインピーダンスを受動素子３Ｂで調整して適正なインピーダンスを得ることが可能になる。   According to the RFID tag attachment 1 having such a configuration, the directivity of the RFID tag tag 4 can be easily changed by simply attaching the RFID tag 4 itself to the tag attachment position 2A preliminarily marked on the base plate 2 without any processing. be able to. Therefore, it is possible to obtain various directivities according to applications with one type of RFID tag 4, and it is not necessary to manufacture RFID tags having different directivities according to the applications. Moreover, since the RFID tag attachment 1 can be reused by configuring the RFID tag attachment to the tag attachment position 2A so as to be detachable, resource saving can be achieved. Further, when the passive element 3B is provided in the parasitic element 3 and the shape of the antenna element 3A of the parasitic element 3 is restricted, the impedance of the parasitic element 3 is adjusted by the passive element 3B to obtain an appropriate impedance. It becomes possible to obtain.

図３及び図４に、ＲＦＩＤタグ用アタッチメントの第２及び第３実施形態を示す。尚、第１実施形態と同一要素には同一符号を付して説明を省略する。
図３の第２実施形態のＲＦＩＤタグ用アタッチメント１０は、無給電素子３のアンテナエレメント３Ａの長さを、調整可能に予め形成した構成例である。
第２実施形態では、図３（Ａ）に示すように図の右側の無給電素子３のアンテナエレメント３Ａに、予め予め切れ込み部３ａを加工形成しておき、アンテナエレメント３Ａの一部を除去することでアンテナエレメント３Ａの長さを調整できるよう構成したものである。 3 and 4 show the second and third embodiments of the RFID tag attachment. In addition, the same code | symbol is attached | subjected to the same element as 1st Embodiment, and description is abbreviate | omitted.
The RFID tag attachment 10 of the second embodiment of FIG. 3 is a configuration example in which the length of the antenna element 3A of the parasitic element 3 is formed in advance so as to be adjustable.
In the second embodiment, as shown in FIG. 3 (A), a cut portion 3a is formed in advance in the antenna element 3A of the parasitic element 3 on the right side of the drawing, and a part of the antenna element 3A is removed. Thus, the length of the antenna element 3A can be adjusted.

かかる構成のＲＦＩＤタグ用アタッチメント１０は、初期状態では図３（Ａ）に示すように両側の無給電素子３，３のアンテナエレメント３Ａ，３Ａは同じ長さに形成してあり、この状態でタグ取付け位置２ＡにＲＦＩＤタグ４を取付けた場合は、ＲＦＩＤタグ４の指向性はベースプレート２のタグ取付け面に対して法線方向（紙面に対して前後方向）となる。また、図３（Ｂ）に示すようにアンテナエレメント３Ａの両端３Ａ′を、前記切れ込み部３ａで切離し除去して図中右側の無給電素子３のアンテナエレメント３Ａの長さを短くした場合は、ＲＦＩＤタグ４の指向性を第１実施形態と同様の方向（図中右側方向）に変えることができる。   In the RFID tag attachment 10 having such a configuration, the antenna elements 3A and 3A of the parasitic elements 3 and 3 on both sides are formed in the same length as shown in FIG. When the RFID tag 4 is attached to the attachment position 2A, the directivity of the RFID tag 4 is in a normal direction with respect to the tag attachment surface of the base plate 2 (front-back direction with respect to the paper surface). Further, as shown in FIG. 3B, when both ends 3A ′ of the antenna element 3A are separated and removed by the cut portion 3a to shorten the length of the antenna element 3A of the parasitic element 3 on the right side in the figure, The directivity of the RFID tag 4 can be changed in the same direction as the first embodiment (right direction in the figure).

図４の第３実施形態のＲＦＩＤタグ用アタッチメント２０は、無給電素子を追加可能に形成した構成例である。
第３実施形態では、ＲＦＩＤタグ用アタッチメント２０のベースプレート２上に、追加する無給電素子５を設ける素子取付け位置２Ｂを予め印してある。
かかる構成のＲＦＩＤタグ用アタッチメント２０では、予め印してある素子取付け位置２Ｂに無給電素子５を追加取付けすることで、ＲＦＩＤタグ４の指向性を変更することができる。図４の例では、図中の破線で示した素子取付け位置２Ｂに無給電素子５を追加すれば、ＲＦＩＤタグ４の指向性は、図中の右方向でより強い指向性（指向角度が狭い）が得られるようになる。
尚、追加する無給電素子５は、取付け作業時の取扱いが容易なように図に示すように例えば絶縁性のシート材５Ｃ上にアンテナエレメント５Ａと必要であれば受動素子５Ｂを形成したものとするとよい。また、無給電素子５は、追加後、用途に応じて取外し可能な構成とするとよい。 The RFID tag attachment 20 of the third embodiment in FIG. 4 is a configuration example in which a parasitic element can be added.
In the third embodiment, the element attachment position 2B where the parasitic element 5 to be added is provided is marked on the base plate 2 of the RFID tag attachment 20 in advance.
In the RFID tag attachment 20 having such a configuration, the directivity of the RFID tag 4 can be changed by additionally attaching the parasitic element 5 to the element attachment position 2B marked in advance. In the example of FIG. 4, if the parasitic element 5 is added to the element mounting position 2B indicated by the broken line in the drawing, the directivity of the RFID tag 4 is stronger in the right direction in the drawing (the directivity angle is narrow). ) Will be obtained.
The parasitic element 5 to be added is formed by, for example, an antenna element 5A and, if necessary, a passive element 5B on an insulating sheet material 5C as shown in the figure so as to facilitate handling during mounting. Good. In addition, the parasitic element 5 may be configured to be removable after the addition depending on the application.

図３や図４の構成のＲＦＩＤタグ用アタッチメント１０，２０によれば、無給電素子の形状、取付け位置、数を変更することにより、１つのアタッチメントで様々な指向性を得ることが可能となり、複数種類のＲＦＩＤタグ用アタッチメントを用いる必要無くＲＦＩＤタグ４の指向性を用途に応じて様々に設定できる。   According to the RFID tag attachments 10 and 20 configured as shown in FIGS. 3 and 4, it is possible to obtain various directivities with one attachment by changing the shape, mounting position, and number of parasitic elements, The directivity of the RFID tag 4 can be variously set according to the use without using a plurality of types of RFID tag attachments.

図３や図４のように、無給電素子の形状、取付け位置及び数を変更可能なＲＦＩＤタグ用アタッチメントの場合、図５に示す第４実施形態のように、ベースプレート２上に予め設けた無給電素子３，３近傍や追加する無給電素子５を取付ける素子取付け位置２Ｂに番号や記号等（図５では番号）を記し、その番号や記号に対応する指向性の形態を対応付けて記した図６に示すような表を、例えばベースプレート２の裏面等に設けるとよい。例えば、図５の１，２，３、・・・（図中四角で囲んである）の各位置、１と２、１と３、１と３と４等の組合せ位置に無給電素子を設けた場合におけるそのときの指向性の形態の説明をその右側の欄に記す。尚、図５は、図３の構造と図４の構造を組み合わせた構造を備えるＲＦＩＤタグ用アタッチメントの例で示してある。
このように無給電素子の形状、取付け位置、数と指向性との関係を記した表を設けることにより、所望の指向性を得るための無給電素子の取付け位置を容易に知ることができ、ＲＦＩＤタグ用アタッチメントの使い勝手を格段に向上できる。 As shown in FIG. 3 and FIG. 4, in the case of an RFID tag attachment in which the shape, attachment position, and number of parasitic elements can be changed, as shown in the fourth embodiment shown in FIG. Numbers, symbols, and the like (numbers in FIG. 5) are written in the vicinity of the feeding elements 3 and 3 and the element mounting position 2B to which the additional parasitic element 5 is attached, and the directivity forms corresponding to the numbers and symbols are described in association with each other. A table as shown in FIG. 6 may be provided on the back surface of the base plate 2, for example. For example, a parasitic element is provided at each of the positions 1, 2, 3,... (Enclosed by squares in FIG. 5), 1, 2, 1, 3, 1, 3, 4, etc. The description of the directivity pattern at that time is described in the right column. FIG. 5 shows an example of an RFID tag attachment having a structure in which the structure of FIG. 3 and the structure of FIG. 4 are combined.
Thus, by providing a table describing the relationship between the shape of the parasitic element, the mounting position, the number and the directivity, it is possible to easily know the mounting position of the parasitic element to obtain the desired directivity, Usability of the RFID tag attachment can be significantly improved.

上述の各実施形態では、１つのベースプレート２に無給電素子３や５を設ける構造例を示したが、図７に示す第５実施形態のＲＦＩＤタグ用アタッチメント４０のように、ベースプレート２を、スペーサ７を介して間隔を設けて積層可能な構成としてＲＦＩＤタグ４の上又は下或いは上下の各方向に、無給電素子３や５を配置できる構成も可能である。尚、図７の無給電素子３の配置は一例であり、この構成においても種々の配置が考えられことは言うまでもない。   In each of the above-described embodiments, the structure example in which the parasitic elements 3 and 5 are provided on one base plate 2 is shown. However, like the RFID tag attachment 40 of the fifth embodiment shown in FIG. A configuration in which the parasitic elements 3 and 5 can be arranged in each of the upper, lower, and upper and lower directions of the RFID tag 4 is also possible as a configuration that can be stacked with an interval between them. The arrangement of the parasitic element 3 in FIG. 7 is an example, and it is needless to say that various arrangements can be considered in this configuration.

また、タグ取付け位置２Ａを挟んで無給電素子３，３を設ける構成例を示したが、必ずしもタグ取付け位置２Ａを挟んで無給電素子３，３を設ける必要はなく、タグ取付け位置２Ａのいずれか一側だけに無給電素子３を設ける構成でもよく、無給電素子の配置は、上述の各実施形態に限定されず、ＲＦＩＤタグ４の指向性を変更できる配置であればどのような配置でもよい。また、無給電素子の数についても上述の各実施形態に限定されるものでないことは言うまでもない。   Moreover, although the example of a structure which provides the parasitic elements 3 and 3 across the tag attachment position 2A is shown, it is not always necessary to provide the parasitic elements 3 and 3 across the tag attachment position 2A. The parasitic element 3 may be provided only on one side. The arrangement of the parasitic element is not limited to the above-described embodiments, and any arrangement is possible as long as the directivity of the RFID tag 4 can be changed. Good. Needless to say, the number of parasitic elements is not limited to the above-described embodiments.

次に、本発明の指向性可変タグについて説明する。
図８は、本発明の指向性可変タグの一実施形態を示す構成図である。
本発明の指向性可変タグは、上述した本発明のＲＦＩＤタグ用アタッチメントにＲＦＩＤタグ部を一体的に設けて構成するものであり、図８の実施形態で示すように、ベースプレート５１と、このベースプレート５１の所定位置に設けたＲＦＩＤタグ部５２と、ベースプレート５１に取付け可能な無給電素子５３とを備えて構成される。尚、図８は本発明の指向性可変タグの１つの構成例を示しただけであり、図８の構成に限定されるものでない。 Next, the directivity variable tag of the present invention will be described.
FIG. 8 is a block diagram showing an embodiment of the variable directivity tag of the present invention.
The directivity variable tag of the present invention is configured by integrally providing an RFID tag portion on the above-described RFID tag attachment of the present invention. As shown in the embodiment of FIG. 8, the base plate 51 and the base plate are provided. The RFID tag portion 52 provided at a predetermined position 51 and a parasitic element 53 that can be attached to the base plate 51 are configured. FIG. 8 shows only one configuration example of the directivity variable tag of the present invention, and the configuration is not limited to the configuration of FIG.

前記ベースプレート５１は、ＲＦＩＤタグ用アタッチメント２０のベースプレート２０と同様にプリント基板材や樹脂シート等で形成され、ベースプレート２のタグ取付け位置２Ａに相当する位置にＲＦＩＤタグ部５２が一体的に設けられる。また、ベースプレート５１上に設けたＲＦＩＤタグ部５２を動作させた時にＲＦＩＤタグ部５２から生じる電磁界と互いに干渉する電磁界を生じるベースプレート２上の位置に、無給電素子５３が例えば着脱自由に取付け可能な素子取付け位置５１Ａが予め印されている。   The base plate 51 is formed of a printed circuit board material, a resin sheet, or the like, like the base plate 20 of the RFID tag attachment 20, and the RFID tag portion 52 is integrally provided at a position corresponding to the tag mounting position 2A of the base plate 2. Further, when the RFID tag portion 52 provided on the base plate 51 is operated, the parasitic element 53 is attached to the position on the base plate 2 that generates an electromagnetic field that interferes with the electromagnetic field generated from the RFID tag portion 52, for example, freely attached and detached. Possible element mounting positions 51A are pre-marked.

前記ＲＦＩＤタグ部５２は、アンテナ５２Ａと、このアンテナ５２Ａを介して無線通信を行うＩＣチップ５２Ｂを、例えば樹脂部材５３Ｃで覆って形成されたもので、例えば前述した既存のＲＦＩＤタグ４をベースプレート５１に一体的に取付けて形成してもよく、また、ベースプレート５１上にアンテナ５２Ａを直接パターン形成し、ベースプレート５１上に直接ＩＣチップ５２Ｂを取付けるようにして、ベースプレート５１の製造時にベースプレート５１上に一体形成したものでもよい。   The RFID tag unit 52 is formed by covering an antenna 52A and an IC chip 52B that performs wireless communication via the antenna 52A with, for example, a resin member 53C. For example, the existing RFID tag 4 described above is formed on the base plate 51. Alternatively, the antenna 52A may be directly formed on the base plate 51, and the IC chip 52B may be directly mounted on the base plate 51 so as to be integrated with the base plate 51 when the base plate 51 is manufactured. It may be formed.

無給電素子５３は、前述と同様で例えば金属、誘電体或いは金属と誘電体の両方からなるアンテナエレメント５３Ａと、該アンテナエレメント５３Ａと電気的に接続した受動素子（抵抗、コンデンサ、インダクタ等）５３Ｂを、取付け作業性を考慮して絶縁性のシート材５３Ｃ上に設けて形成されている。   The parasitic element 53 is the same as described above, for example, an antenna element 53A made of metal, dielectric or both metal and dielectric, and a passive element (resistor, capacitor, inductor, etc.) 53B electrically connected to the antenna element 53A. Is formed on the insulating sheet material 53C in consideration of the mounting workability.

かかる構成の指向性可変タグ５０では、ベースプレート５１上の素子取付け位置５１Ａに無給電素子５３を取付けるだけで、ＲＦＩＤタグ部５２の指向性を変えることができるので、所望する指向性に合わせて無給電素子５３を取付ける素子取付け位置５１Ｂや数を選択するだけで、用途に応じた様々な指向性を得ることができる。   In the directivity variable tag 50 having such a configuration, the directivity of the RFID tag portion 52 can be changed by simply attaching the parasitic element 53 to the element mounting position 51A on the base plate 51. Various directivities according to the application can be obtained simply by selecting the element mounting positions 51B and the number of the power supply elements 53 to be attached.

尚、図５と同様に、ベースプレート５１上の各素子５１Ａに番号や記号等を記し、その番号や記号に対応する指向性の形態を対応付けて記した表を例えばベースプレート５１の裏面等に設けることで、所望の指向性を得るための無給電素子５３の取付け位置を容易に知ることができ、指向性可変ＲＦＩＤタグの使い勝手を格段に向上できる。   As in FIG. 5, numbers, symbols, and the like are written on each element 51 </ b> A on the base plate 51, and a table in which the directivity forms corresponding to the numbers and symbols are associated is provided on, for example, the back surface of the base plate 51. Thus, the attachment position of the parasitic element 53 for obtaining the desired directivity can be easily known, and the usability of the directivity variable RFID tag can be greatly improved.

本発明に係るＲＦＩＤタグ用アタッチメントの第１実施形態を示す平面図The top view which shows 1st Embodiment of the attachment for RFID tags which concerns on this invention ＲＦＩＤタグ用アタッチメントによるＲＦＩＤタグの指向性制御の説明図Explanatory drawing of RFID tag directivity control by RFID tag attachment 本発明の第２実施形態を示す平面図The top view which shows 2nd Embodiment of this invention 本発明の第３実施形態を示す平面図The top view which shows 3rd Embodiment of this invention 本発明の第４実施形態を示す平面図The top view which shows 4th Embodiment of this invention 無給電素子位置と指向性との対応関係を示す表の一例を示す図The figure which shows an example of the table | surface which shows the correspondence of a parasitic element position and directivity 本発明の第５実施形態を示す側面図Side view showing a fifth embodiment of the present invention 本発明に係る指向性可変タグの一実施形態を示す平面図The top view which shows one Embodiment of the directivity variable tag which concerns on this invention

符号の説明Explanation of symbols

１，１０，２０，３０，４０ ＲＦＩＤタグ用アタッチメント
２，５１ ベースプレート
２Ａ タグ取付け位置
２Ｂ，５１Ａ 素子取付け位置
３，５，５３ 無給電素子
３Ａ，５Ａ，５３Ａ アンテナエレメント
３Ｂ，５Ｂ，５３Ｂ 受動素子
４ ＲＦＩＤタグ
５０ 指向性可変タグ
５２ ＲＦＩＤタグ部 1, 10, 20, 30, 40 RFID tag attachment 2, 51 Base plate 2A Tag mounting position 2B, 51A Element mounting position 3, 5, 53 Parasitic element 3A, 5A, 53A Antenna element 3B, 5B, 53B Passive element 4 RFID tag 50 Directivity variable tag 52 RFID tag section

Claims (7)

ＲＦＩＤタグを取付けるためのタグ取付け位置を予め印したベースプレートと、
少なくともアンテナエレメントを有し、前記タグ取付け位置にＲＦＩＤタグを取付けた時にＲＦＩＤタグから生じる電磁界と互いに干渉する電磁界を生じるよう前記ベースプレート上に予め設けた無給電素子と、
を備えて構成したことを特徴とするＲＦＩＤタグ用アタッチメント。 A base plate pre-marked with a tag mounting position for mounting an RFID tag;
A parasitic element that has at least an antenna element and is provided in advance on the base plate so as to generate an electromagnetic field that interferes with an electromagnetic field generated from the RFID tag when the RFID tag is mounted at the tag mounting position;
An attachment for an RFID tag, comprising: 前記ベースプレートは、前記無給電素子を追加取付け可能な構成で、追加する無給電素子の取付け状態が予め印されている請求項１に記載のＲＦＩＤタグ用アタッチメント。   2. The RFID tag attachment according to claim 1, wherein the base plate has a configuration in which the parasitic element can be additionally attached, and an attachment state of the parasitic element to be added is marked in advance. 前記無給電素子の前記アンテナエレメントが、長さ調整可能に予め形成された請求項１又は２に記載のＲＦＩＤタグ用アタッチメント。   The RFID tag attachment according to claim 1 or 2, wherein the antenna element of the parasitic element is formed in advance so as to be adjustable in length. 前記ベースプレートに、前記無給電素子の取付け状態と該取付け状態に応じたＲＦＩＤタグの指向性方向との対応関係を示す構成とした請求項１〜３のいずれか１つに記載のＲＦＩＤタグ用アタッチメント。   The RFID tag attachment according to any one of claims 1 to 3, wherein the base plate is configured to show a correspondence relationship between an attachment state of the parasitic element and a directivity direction of the RFID tag according to the attachment state. . 前記ベースプレートをプリント基板材で形成し、該プリント基板材上に前記無給電素子のアンテナエレメントのパターンをエッチング加工で形成する構成とした請求項１〜４のいずれか１つに記載のＲＦＩＤタグ用アタッチメント。   5. The RFID tag according to claim 1, wherein the base plate is formed of a printed board material, and the antenna element pattern of the parasitic element is formed on the printed board material by etching. attachment. 前記無給電素子は、前記アンテナエレメントと電気的に接続する受動素子を備える請求項１〜５のいずれか１つに記載のＲＦＩＤタグ用アタッチメント。   The RFID tag attachment according to claim 1, wherein the parasitic element includes a passive element that is electrically connected to the antenna element. 請求項１〜６のいずれか１つに記載のアタッチメントにおけるベースプレート上のタグ取付け位置に、アンテナ及び該アンテナを介して無線通信を行うＩＣチップを備えたＲＦＩＤ用タグ部を一体的に設けて構成したことを特徴とする指向性可変ＲＦＩＤタグ。   An RFID tag unit including an antenna and an IC chip that performs wireless communication via the antenna is integrally provided at a tag mounting position on the base plate of the attachment according to any one of claims 1 to 6. A directional variable RFID tag characterized by the above.
JP2007007882A 2007-01-17 2007-01-17 Attachment for rfid tag and directivity-changeable rfid tag Pending JP2008177739A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2019047153A (en) * 2017-08-29 2019-03-22 京セラ株式会社 Power reception antenna, power reception device, antenna component and assembly method for power reception antenna

Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05167219A (en) * 1991-12-17 1993-07-02 Mitsubishi Electric Corp Substrate printing method
JPH11274845A (en) * 1998-03-26 1999-10-08 Mitsubishi Materials Corp Antenna system
JP2002151947A (en) * 2000-11-09 2002-05-24 Tohken Co Ltd Antenna structure for rf id tag
JP2003087050A (en) * 2001-09-14 2003-03-20 Sansei Denki Kk Slot-type bowtie antenna device, and constituting method therefor
JP2004128557A (en) * 2002-09-30 2004-04-22 Seiko Epson Corp Directivity switching antenna
JP2005071179A (en) * 2003-08-26 2005-03-17 Kobayashi Kirokushi Co Ltd Rfid data carrier
JP2005354176A (en) * 2004-06-08 2005-12-22 Yagi Antenna Co Ltd Vehicle-mounted antenna
JP2006067478A (en) * 2004-08-30 2006-03-09 Kobayashi Kirokushi Co Ltd Rfid data carrier
JP2006101413A (en) * 2004-09-30 2006-04-13 Advanced Telecommunication Research Institute International Antenna device and radio device using same
JP2006295879A (en) * 2005-03-17 2006-10-26 Fujitsu Ltd Tag antenna
JP2006324766A (en) * 2005-05-17 2006-11-30 Nec Tokin Corp Radio tag and adjustment method of antenna characteristic of radio tag

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05167219A (en) * 1991-12-17 1993-07-02 Mitsubishi Electric Corp Substrate printing method
JPH11274845A (en) * 1998-03-26 1999-10-08 Mitsubishi Materials Corp Antenna system
JP2002151947A (en) * 2000-11-09 2002-05-24 Tohken Co Ltd Antenna structure for rf id tag
JP2003087050A (en) * 2001-09-14 2003-03-20 Sansei Denki Kk Slot-type bowtie antenna device, and constituting method therefor
JP2004128557A (en) * 2002-09-30 2004-04-22 Seiko Epson Corp Directivity switching antenna
JP2005071179A (en) * 2003-08-26 2005-03-17 Kobayashi Kirokushi Co Ltd Rfid data carrier
JP2005354176A (en) * 2004-06-08 2005-12-22 Yagi Antenna Co Ltd Vehicle-mounted antenna
JP2006067478A (en) * 2004-08-30 2006-03-09 Kobayashi Kirokushi Co Ltd Rfid data carrier
JP2006101413A (en) * 2004-09-30 2006-04-13 Advanced Telecommunication Research Institute International Antenna device and radio device using same
JP2006295879A (en) * 2005-03-17 2006-10-26 Fujitsu Ltd Tag antenna
JP2006324766A (en) * 2005-05-17 2006-11-30 Nec Tokin Corp Radio tag and adjustment method of antenna characteristic of radio tag

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2019047153A (en) * 2017-08-29 2019-03-22 京セラ株式会社 Power reception antenna, power reception device, antenna component and assembly method for power reception antenna

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