JP2008146567A - Reader/writer equipment of non-contact communication system - Google Patents

Reader/writer equipment of non-contact communication system Download PDF

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JP2008146567A
JP2008146567A JP2006335808A JP2006335808A JP2008146567A JP 2008146567 A JP2008146567 A JP 2008146567A JP 2006335808 A JP2006335808 A JP 2006335808A JP 2006335808 A JP2006335808 A JP 2006335808A JP 2008146567 A JP2008146567 A JP 2008146567A
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circuit
ground
wiring
communication system
reader
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JP4382081B2 (en
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Mitsuhiro Iida
光浩 飯田
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ART TECHNOLGY KK
ART Technology KK
SYST DESIGN KK
System Design Co Ltd
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ART TECHNOLGY KK
ART Technology KK
SYST DESIGN KK
System Design Co Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To provide R/W equipment of a non-contact communication system capable of housing a circuit and an antenna coil within a small area and expanding a transmittable and receivable range to a more practical distance. <P>SOLUTION: The reader/writer equipment of the non-contact communication system for transmitting and receiving information to/from a storage medium without contacting comprises: a circuit for performing processing for transmitting and receiving the information; an antenna coil disposed at a close position around the circuit for making it possible to transmit and receive the information between the recording medium and the circuit and supplying required power to the recording medium; and ground loop wiring in a closed loop shape extended from a part of ground wiring inside the circuit and circulated once, twice or more so as to surround an area where an electronic component to be easily affected by a magnetic field among the electronic components disposed inside the circuit is disposed at least. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

本発明は、非接触の近距離無線通信によって、ＩＣタグ等の記録媒体とリーダ／ライタ装置（以下Ｒ／Ｗ装置と記載する）との間で情報の送受信を行う非接触通信システムに関し、特に、非接触通信システムの小型化に好適なリーダ／ライタ装置に関する。   The present invention relates to a non-contact communication system that transmits and receives information between a recording medium such as an IC tag and a reader / writer device (hereinafter referred to as an R / W device) by non-contact short-range wireless communication. The present invention relates to a reader / writer device suitable for downsizing a contactless communication system.

非接触の近距離無線通信によって、ＩＣタグ等の記録媒体とリーダ／ライタ装置（以下Ｒ／Ｗ装置と記載する）との間で情報の送受信を行う非接触通信システムが知られており、物流や人の出入り管理等の多様な用途に利用されている（例えば特許文献１，２，３参照）。
このような非接触通信システムにおいてシステムを小型化する過程においては、アンテナから発生する磁場の影響が問題になることから、例えば特許文献１に記載のシステムでは、公知のショートリングを用いて磁場の影響を極力削減しようとしている。
特開２００３−１８７１９５号公報 特開２００５−１０２１８５号公報 特開２００２−３１２７３８号公報 A non-contact communication system that transmits and receives information between a recording medium such as an IC tag and a reader / writer device (hereinafter referred to as an R / W device) by non-contact short-range wireless communication is known. It is used for various purposes such as access control of people and people (see, for example, Patent Documents 1, 2, and 3).
In the process of downsizing the system in such a non-contact communication system, since the influence of the magnetic field generated from the antenna becomes a problem, for example, in the system described in Patent Document 1, the magnetic field of the magnetic field can be reduced using a known short ring. We are trying to reduce the impact as much as possible.
JP 2003-187195 A JP-A-2005-102185 JP 2002-312738 A

特許文献１に記載の技術では、記録媒体であるＩＣカードの周縁に沿って配置したアンテナとカードのほぼ中央に配置した回路（セル）との間にショートリングを設けている。特許文献１に記載の技術はＩＣカードに関するものであるが、この技術はＲ／Ｗ装置にも適用が可能で、この技術を用いることで磁場の影響をある程度削減することができる。
しかし、システムをさらに小型化しようとする場合、具体的には、Ｒ／Ｗ装置の主要部である回路を数ｍｍ〜十数ｍｍ角程度の領域内に収め、この回路の近位置にアンテナコイルを設けようとすると、ショートリングでは磁場の影響を十分に削減できないおそれがある。また、現状の非接触通信では、記録媒体とＲ／Ｗ装置との送受信可能距離が小さく（数ｍｍ程度）、より実用的な範囲（数十ｍｍ程度）まで拡張することは困難な状況である。 In the technique described in Patent Document 1, a short ring is provided between an antenna arranged along the periphery of an IC card that is a recording medium and a circuit (cell) arranged almost at the center of the card. Although the technique described in Patent Document 1 relates to an IC card, this technique can also be applied to an R / W device. By using this technique, the influence of a magnetic field can be reduced to some extent.
However, in order to further reduce the size of the system, specifically, the circuit, which is the main part of the R / W device, is accommodated in an area of about several mm to several tens of mm square, and the antenna coil is placed in the vicinity of this circuit If it is going to provide, there exists a possibility that the influence of a magnetic field cannot fully be reduced with a short ring. In the current non-contact communication, the transmission / reception distance between the recording medium and the R / W device is small (several millimeters), and it is difficult to expand to a more practical range (several tens of millimeters). .

本発明は上記の課題を解決するためになされたもので、アンテナコイルを近位置に配置した状態で回路を数ｍｍ〜十数ｍｍ角程度の領域内に収めることができ、かつ、小型化しても実用的な距離で送受信が可能な非接触通信システムのＲ／Ｗ装置の提供を目的とする。   The present invention has been made in order to solve the above-described problems. The circuit can be accommodated in an area of several mm to several tens of mm square with the antenna coil disposed in a close position, and the size of the circuit can be reduced. Another object of the present invention is to provide an R / W device for a non-contact communication system capable of transmitting and receiving at a practical distance.

上記目的を達成するために、本発明の発明者が鋭意研究を行った結果、接地配線から延出させた配線パターンで回路の全体若しくは回路内における磁場の影響を受けやすい領域を取り囲み、かつ、その配線パターンを閉ループ状にすることで、磁場が回路に与える悪影響を効果的に低減できることに想到した。
具体的に本発明は、請求項１に記載するように、記憶媒体との間で非接触に情報の送受信を行う非接触通信システムのリーダ／ライタ装置において、前記情報の送受信のための処理を行う回路と、この回路の周囲の近接位置に配置され、前記記録媒体と前記回路との間で情報の送受信を可能にするとともに、前記記録媒体に対して必要な電力の供給を行うアンテナコイルと、前記回路内の接地配線の一部から延出し、少なくとも前記回路内に配置される電子部品のうち磁場の影響を受けやすい電子部品が配置された領域を取り囲むように、一周又は複数周する閉ループ状のグランドループ配線とを有する構成としてある。
なお、本発明の説明において「送受信」には、送信及び受信の双方の行う場合のほか、送信だけ又は受信だけの場合も含まれるものとする。 In order to achieve the above object, the inventors of the present invention conducted extensive research, and as a result, surrounded by the wiring pattern extended from the ground wiring, the entire circuit or a region susceptible to the magnetic field in the circuit, and The inventors have conceived that the adverse effect of the magnetic field on the circuit can be effectively reduced by making the wiring pattern a closed loop.
Specifically, as described in claim 1, the present invention provides a reader / writer device of a non-contact communication system that performs non-contact transmission / reception of information to / from a storage medium. And an antenna coil that is arranged in a proximity position around the circuit, enables transmission / reception of information between the recording medium and the circuit, and supplies necessary power to the recording medium A closed loop that extends from a part of the ground wiring in the circuit and surrounds at least one region of the electronic components arranged in the circuit that is susceptible to the influence of a magnetic field. And a ground loop wiring.
In the description of the present invention, “transmission / reception” includes both transmission and reception as well as transmission and reception only.

前記グランドループ配線は、請求項２に記載するように、前記回路上に配置された電子部品のうち最も磁場の影響を受けやすい電子部品の接地配線上から延出させてもよい。例えば、電子部品がＩＣやトランジスタである場合には、接地端子に直接又は接地端子に接続された接地配線上に設けてもよい。
請求項３に記載するように、前記回路内の接地配線の一部が、前記グランドループ配線の一部を構成するようにしてもよい。
このようにすることで、グランドループ配線のために新たに配線を形成する必要がなく、かつ、既存の配線を利用することで、省スペースを図ることができる。 As described in claim 2, the ground loop wiring may be extended from the ground wiring of an electronic component most susceptible to a magnetic field among electronic components arranged on the circuit. For example, when the electronic component is an IC or a transistor, the electronic component may be provided directly on the ground terminal or on the ground wiring connected to the ground terminal.
According to a third aspect of the present invention, a part of the ground wiring in the circuit may constitute a part of the ground loop wiring.
In this way, it is not necessary to form a new wiring for the ground loop wiring, and space can be saved by using the existing wiring.

回路基板の中には、表裏両面に回路が形成されたものがある。このような回路基板においては、請求項４に記載するように、一面側から延出する前記グランドループ配線の一部が他面側を通過するように形成してもよい。
この構成によれば、例えば一面側にグランドループ配線を形成するようなスペースが無い場合にも、他面側のスペースや既存の接地配線を利用してグランドループ配線を形成できるという利点がある。
また、複数枚の回路基板を積層させる場合には、請求項５に記載するように、一の前記回路基板から延出する前記グランドループ配線の一部が、少なくとも一つの他の回路基板を通過するように構成してもよい。
この構成によれば、例えば一の回路基板上にグランドループ配線を形成するようなスペースが無い場合にも、他の回路基板のスペースや既存の接地配線を利用してグランドループ配線を形成できるという利点がある。
なお、本発明が適用される回路において、磁場の影響を受けやすい電子部品としては、請求項６に記載するように、ＩＣやトランジスタを挙げることができる。 Some circuit boards have circuits formed on both sides. In such a circuit board, as described in claim 4, a part of the ground loop wiring extending from one surface side may pass through the other surface side.
According to this configuration, for example, even when there is no space for forming the ground loop wiring on one surface side, there is an advantage that the ground loop wiring can be formed using the space on the other surface side or the existing ground wiring.
When a plurality of circuit boards are stacked, as described in claim 5, a part of the ground loop wiring extending from one circuit board passes through at least one other circuit board. You may comprise.
According to this configuration, for example, even when there is no space for forming the ground loop wiring on one circuit board, the ground loop wiring can be formed using the space of another circuit board or the existing ground wiring. There are advantages.
In the circuit to which the present invention is applied, as an electronic component that is easily influenced by a magnetic field, an IC or a transistor can be cited as described in claim 6.

本発明のＲ／Ｗ装置は、回路とアンテナコイルとを小さな領域内、具体的には、アンテナコイルを近接させた状態で回路を数ｍｍ〜十数ｍｍ角程度の領域内に収めることができ、かつ、小型化しても実用的な距離で送受信を行うことができる。   The R / W device of the present invention can fit the circuit and the antenna coil in a small area, specifically, the circuit in a range of several mm to several tens of mm square with the antenna coil in close proximity. In addition, transmission and reception can be performed at a practical distance even if the size is reduced.

以下、本発明の好適な実施形態を、図面を参照しながら詳細に説明する。
図１は、本発明の基本的な概念を説明する第一の実施形態にかかり、Ｒ／Ｗ装置の主要部の概略図である。
符号１は回路基板で、この回路基板１の上に、数ｍｍ〜十数ｍｍ角程度の回路１１とアンテナコイル１３とが配置されている。
回路１１は、情報の読み出しや情報の書き込みを行うための処理を実行するもので、ＩＣ１２ａの他種々の電子部品１２ｂが図示しない配線パターン上に配置されている。図において一点鎖線は、前記配線パターン及び電子部品１２ｂで構成される回路１１の領域の外縁を示している。
アンテナコイル１３は、記録媒体であるタグ（図示せず）と回路１１との間で情報の送受信を行うとともに、タグに対して必要な電力を供給する役割も担っている。
なお、回路１１及びアンテナコイル１３の基本構成は公知のものと変わりがないので、ここではこれ以上の説明は省略する。 DESCRIPTION OF EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings.
FIG. 1 is a schematic diagram of a main part of an R / W device according to a first embodiment for explaining the basic concept of the present invention.
Reference numeral 1 denotes a circuit board, on which a circuit 11 and an antenna coil 13 of about several mm to several tens of mm square are arranged.
The circuit 11 executes processing for reading information and writing information, and various electronic components 12b in addition to the IC 12a are arranged on a wiring pattern (not shown). In the figure, the alternate long and short dash line indicates the outer edge of the region of the circuit 11 composed of the wiring pattern and the electronic component 12b.
The antenna coil 13 transmits and receives information between a tag (not shown) that is a recording medium and the circuit 11, and also has a role of supplying necessary power to the tag.
The basic configuration of the circuit 11 and the antenna coil 13 is the same as that of a known one, so that further explanation is omitted here.

回路１１の配線パターンには、図示しない電源配線と接地配線とが接続されている。電子部品の一つであるＩＣ１２ａの複数本の端子のうち一本が、前記配線パターンのうちの接地配線パターンに接続されている。
この実施形態では、最も磁場の影響を受けやすい電子部品であるＩＣ１２ａの複数の端子のうち接地端子（グランド端子）から、接地配線パターンを回路１１の外縁まで延出させている。そして、この接地配線パターンを、回路１１の外周縁に沿って、アンテナコイル１３と回路１１の間の隙間を一周させ、ＩＣ１２ａの接地端子から延びる接地配線パターン上の結合点１４ａで接合している。これにより、回路１１の周囲を一周する閉ループ状のグランドループ配線１４が形成される。 A power wiring and a ground wiring (not shown) are connected to the wiring pattern of the circuit 11. One of the plurality of terminals of the IC 12a that is one of the electronic components is connected to the ground wiring pattern of the wiring patterns.
In this embodiment, the ground wiring pattern is extended from the ground terminal (ground terminal) to the outer edge of the circuit 11 among the plurality of terminals of the IC 12a which is the electronic component most susceptible to the magnetic field. Then, the ground wiring pattern is joined along the outer peripheral edge of the circuit 11 at a coupling point 14a on the ground wiring pattern that extends around the gap between the antenna coil 13 and the circuit 11 and extends from the ground terminal of the IC 12a. . As a result, a closed-loop ground loop wiring 14 that goes around the circuit 11 is formed.

次に、図２及び図３を参照しながら、本発明の他の実施形態を説明する。
図２（ａ）は、本発明の第二の実施形態にかかり、Ｒ／Ｗ装置の主要部の概略図である。
図２（ａ）の回路基板２は、表裏両面に回路が形成されている（表面側の回路を符号２１ａで、裏面側の回路を符号２１ｂで示す）。このような回路基板２においては、表裏両面にアンテナコイル２３を設けてもよい。
また、この回路基板２には、複数のスルーホール２ａ，２ｂ・・・が形成されていて、このスルーホール２ａ，２ｂ・・・を介して、表裏両面の回路２１ａ，２１ｂの配線パターンが接続されている。 Next, another embodiment of the present invention will be described with reference to FIGS.
FIG. 2A is a schematic diagram of a main part of the R / W device according to the second embodiment of the present invention.
The circuit board 2 of FIG. 2A has circuits formed on both front and back surfaces (a circuit on the front surface side is denoted by reference numeral 21a and a circuit on the back surface side is denoted by reference numeral 21b). In such a circuit board 2, the antenna coil 23 may be provided on both the front and back surfaces.
Further, a plurality of through holes 2a, 2b,... Are formed in the circuit board 2, and the wiring patterns of the circuits 21a, 21b on both the front and back surfaces are connected through the through holes 2a, 2b,. Has been.

この実施形態においても、第一の実施形態と同様に、ＩＣ２２ａの接地端子からグランドループ配線２４を延出させ、ここから回路２１ａの外側まで延びる接地配線パターン上の結合点２４ａまでループを一周させている。
この実施形態において先の第一の実施形態と異なる点の第一は、表面の回路２１ａから延出させたグランドループ配線２４の一部が、スルーホール２ａを通って裏面の回路２１ｂまで延び（図２（ａ）中、裏面側のグランドループ配線２４を点線で示す）、別のスルーホール２ｂを通って表面の回路２１ａに戻っている点である。
このように、本発明では、回路基板２の表裏に形成された二つの回路２１ａ，２１ｂを通って、グランドループ配線２４を形成するようにしてもよい。 Also in this embodiment, as in the first embodiment, the ground loop wiring 24 is extended from the ground terminal of the IC 22a, and the loop is made to reach the coupling point 24a on the ground wiring pattern extending from here to the outside of the circuit 21a. ing.
In this embodiment, the first difference from the first embodiment is that a part of the ground loop wiring 24 extended from the circuit 21a on the front surface extends to the circuit 21b on the back surface through the through hole 2a ( In FIG. 2 (a), the ground loop wiring 24 on the back surface side is indicated by a dotted line), which is a point that returns to the circuit 21a on the front surface through another through hole 2b.
Thus, in the present invention, the ground loop wiring 24 may be formed through the two circuits 21 a and 21 b formed on the front and back of the circuit board 2.

この実施形態において先の第一の実施形態と異なる点の第二は、グランドループ配線２４が回路２１ａ，２１ｂの全体ではなく、回路２１ａ，２１ｂの一部の領域を取り囲むように形成されている点である。
図２（ａ）中符号２２ｃで示す電子部品は、磁場の影響をほとんど受けない二次電池等である。このような電子部品２２ｃは、グランドループ配線２４の外側に位置させても構わない。
このように本発明では、回路２１ａ，２１ｂの一部の領域、すなわち磁場の影響を受けやすい領域を特定して、当該特定領域を取り囲むようにグランドループ配線２４を形成してもよい。 In this embodiment, the second difference from the first embodiment is that the ground loop wiring 24 is formed so as to surround a part of the circuits 21a and 21b, not the entire circuits 21a and 21b. Is a point.
An electronic component indicated by reference numeral 22c in FIG. 2A is a secondary battery or the like that is hardly affected by a magnetic field. Such an electronic component 22 c may be positioned outside the ground loop wiring 24.
As described above, in the present invention, a partial region of the circuits 21a and 21b, that is, a region susceptible to the influence of the magnetic field may be specified, and the ground loop wiring 24 may be formed so as to surround the specific region.

この実施形態では、グランドループ配線２４の一部が回路２１ａ，２１ｂ内を通過することになる。この場合、グランドループ配線２４を新たに形成するための余分なスペースが回路２１ａ，２１ｂ内に確保できないことがある。そこで、このような場合には、回路１１内に形成された既存の接地配線パターンを利用して、グランドループ配線２４の一部を構成させるとよい。
なお、この実施形態のように、回路１１内に形成された既存の接地配線パターンをグランドループ配線２４の一部として利用する場合において、（ｂ）に示すように、接地配線パターン（実線２６ａで示す）の一部が回路１１内でループしている（ループしている部分を実線２６ｂで示す）場合は、このまま接地配線パターン（２６ａ，２６ｂ）を利用すると、グランドループ配線２４が二重（又は多重）ループ状となることがある。このような場合は、ループ２６ｂの入口部分を架橋（架橋部分を点線２６ｃで示す）し、接地配線パターン２６ａによってグランドループ配線２４が真っ直ぐに延びるようにするとともに、ループ２６ｂの途中部位の一部を切断（切断箇所を符号２６ｄで示す）するとよい。 In this embodiment, a part of the ground loop wiring 24 passes through the circuits 21a and 21b. In this case, an extra space for newly forming the ground loop wiring 24 may not be secured in the circuits 21a and 21b. Therefore, in such a case, a part of the ground loop wiring 24 may be configured using an existing ground wiring pattern formed in the circuit 11.
In the case where the existing ground wiring pattern formed in the circuit 11 is used as a part of the ground loop wiring 24 as in this embodiment, as shown in FIG. When a part of the loop 11 is looped in the circuit 11 (the looped part is indicated by a solid line 26b), if the ground wiring pattern (26a, 26b) is used as it is, the ground loop wiring 24 is doubled ( (Or multiple) loops. In such a case, the entrance portion of the loop 26b is bridged (the bridge portion is indicated by a dotted line 26c) so that the ground loop wiring 24 extends straight by the ground wiring pattern 26a, and a part of the midway portion of the loop 26b is formed. It is good to cut | disconnect (a cutting location is shown with the code | symbol 26d).

図３は、本発明の第三の実施形態にかかり、Ｒ／Ｗ装置の主要部の概略を斜視図で示したものである。
この実施形態では、複数枚（図示の例では二枚）の回路基板３，４を積層して多層回路基板を構成している。
下方の回路基板３には、表裏両面に回路が形成されている（表面側の回路を符号２１ａで、裏面側の回路を符号２１ｂで示す）ものとする。特に図示はしないが、アンテナコイル３３は、回路基板３，４のそれぞれに設けてもよい。
また、図３に示す例では、下方の回路基板３の裏面側の回路３１ｂにＩＣ３２ａが配置されているものとする。 FIG. 3 is a perspective view schematically showing the main part of the R / W device according to the third embodiment of the present invention.
In this embodiment, a multilayer circuit board is configured by laminating a plurality (two in the illustrated example) of circuit boards 3 and 4.
It is assumed that circuits are formed on the front and back surfaces of the lower circuit board 3 (the front side circuit is indicated by reference numeral 21a and the back side circuit is indicated by reference numeral 21b). Although not particularly illustrated, the antenna coil 33 may be provided on each of the circuit boards 3 and 4.
In the example shown in FIG. 3, it is assumed that the IC 32 a is arranged on the circuit 31 b on the back surface side of the lower circuit board 3.

第二の実施形態と同様に、下方の回路基板３には複数のスルーホール３ａ，３ｂが形成され、上方の回路基板４にも、複数のスルーホール４ａ，４ｂが形成されている。
この実施形態では、下方の回路基板３における裏面の回路３１ｂに配置された回路ＩＣ３２ａの接地端子からグランドループ配線３４を延出させている。グランドループ配線３４は回路３１ｂとアンテナコイル３３との間の隙間を通ってスルーホール３ａに達し、このスルーホール３ａを挿通して上方の回路基板４まで延びる。そして、上方の回路基板４のスルーホール４ａから回路４１内の接地配線パターンを利用して別のスルーホール４ｂに達し、このスルーホール４ｂを挿通して下方の回路基板３における表面の回路３１ａまで延びる。さらに、回路３１ａの既存の接地配線パターンを通ってスルーホール３ｂに達し、このスルーホール３ｂから裏面の回路３１ｂに戻り、結合点３４ａに達している。 As in the second embodiment, the lower circuit board 3 has a plurality of through holes 3a and 3b, and the upper circuit board 4 has a plurality of through holes 4a and 4b.
In this embodiment, the ground loop wiring 34 is extended from the ground terminal of the circuit IC 32 a disposed on the circuit 31 b on the back surface of the lower circuit board 3. The ground loop wiring 34 reaches the through hole 3a through a gap between the circuit 31b and the antenna coil 33, and extends to the upper circuit board 4 through the through hole 3a. Then, the through-hole 4a of the upper circuit board 4 reaches another through-hole 4b using the ground wiring pattern in the circuit 41, and passes through this through-hole 4b to the circuit 31a on the surface of the lower circuit board 3 Extend. Further, it reaches the through hole 3b through the existing ground wiring pattern of the circuit 31a, returns from the through hole 3b to the circuit 31b on the back surface, and reaches the coupling point 34a.

このように、本発明では、回路基板３の表裏に形成された二つの回路３１ａ，３１ｂだけでなく、他の回路基板４を通ってグランドループ配線３４が形成されていてもよい。
なお、複数枚の回路基板の一部又は全部が表裏両面に回路を有する場合や、積層する回路基板の枚数が三枚以上になった場合にも、上記の第二の実施形態又は第三の実施形態を個々に適用し、又は、第二の実施形態及び第三の実施形態を組み合わせて適用すればよい。 Thus, in the present invention, the ground loop wiring 34 may be formed not only through the two circuits 31 a and 31 b formed on the front and back of the circuit board 3 but also through another circuit board 4.
In addition, when a part or all of a plurality of circuit boards have circuits on both front and back sides, or when the number of circuit boards to be stacked is three or more, the second embodiment or the third embodiment described above is used. The embodiments may be applied individually, or the second embodiment and the third embodiment may be applied in combination.

本発明の発明者は、本発明の効果を試すために試験片を作成し、通信試験を行った。
使用した試験片は、１５ｍｍ角の領域内にＩＣを含む回路を形成し、この回路の周囲にアンテナコイルを設けたものである。アンテナコイルと回路の外周縁との隙間は約１．５ｍｍとした。この隙間に、ＩＣの接地端子から延出し回路の周囲を一周するグランドループ配線を線幅０．２ｍｍで形成した。
その結果、グランドループ配線を設けない場合に比して磁場の影響を大幅に削減することができ、出力を１００ｍＷ程度まで大きくして、従来３〜５ｍｍ程度であった送受信可能距離を、４０〜５０ｍｍ程度までに拡大することができた。 The inventor of the present invention created a test piece and conducted a communication test in order to test the effect of the present invention.
The test piece used is a circuit in which a circuit including an IC is formed in a 15 mm square region, and an antenna coil is provided around the circuit. The gap between the antenna coil and the outer peripheral edge of the circuit was about 1.5 mm. In this gap, a ground loop wiring extending from the ground terminal of the IC and making a round around the circuit was formed with a line width of 0.2 mm.
As a result, the influence of the magnetic field can be greatly reduced as compared with the case where no ground loop wiring is provided, the output can be increased to about 100 mW, and the transmission / reception distance that has conventionally been about 3 to 5 mm can be reduced to 40 to 40 mm. It was possible to enlarge to about 50 mm.

本発明の好適な実施形態について説明したが、本発明は上記の実施形態に限定されるものではない。
例えば、グランドループ配線１４，２４，３４は一条のみ形成するものとして説明したが、二条又は三条以上形成することで効果が増大するのであれば、二条又は三条以上形成してもよい。
また、グランドループ配線１４，２４，３４はＩＣ１２ａ，２２ａ，３３ａに限らず、他の電子部品１２ｂ，２２ｂ，３３ｂから延ばすようにしてもよいし、回路１１，２１ａ，２１ｂ，３１ａ，３１ｂ上に形成された接地配線パターンの途中部位から延出させるようにしてもよい。 Although a preferred embodiment of the present invention has been described, the present invention is not limited to the above-described embodiment.
For example, the ground loop wirings 14, 24, and 34 have been described as being formed in only one line, but if the effect is increased by forming two or three or more lines, two or three or more lines may be formed.
The ground loop wires 14, 24, and 34 are not limited to the ICs 12a, 22a, and 33a, and may be extended from other electronic components 12b, 22b, and 33b, or on the circuits 11, 21a, 21b, 31a, and 31b. You may make it extend from the intermediate part of the formed grounding wiring pattern.

本発明は、物流や人の管理等に利用される非接触通信システムのＲ／Ｗ装置に広範に適用が可能である。   The present invention can be widely applied to R / W devices of non-contact communication systems used for physical distribution and human management.

本発明の基本的な概念を説明するための第一の実施形態にかかり、Ｒ／Ｗ装置の主要部の概略図である。1 is a schematic diagram of a main part of an R / W device according to a first embodiment for explaining a basic concept of the present invention. （ａ）は本発明の第二の実施形態にかかり、Ｒ／Ｗ装置の主要部の概略図、（ｂ）は回路内の接地配線がループ状になっている場合のグランドループ配線の形成例を示す部分拡大図である。(A) is a schematic view of the main part of the R / W device according to the second embodiment of the present invention, and (b) is an example of forming a ground loop wiring when the ground wiring in the circuit is in a loop shape. FIG. 本発明の第三の実施形態にかかり、Ｒ／Ｗ装置の主要部の概略を斜視図で示したものである。The outline of the principal part of R / W apparatus concerning 3rd embodiment of this invention is shown with the perspective view.

符号の説明Explanation of symbols

１，２，３，４ 回路基板
２ａ，２ｂ，３ａ，３ｂ，４ａ，４ｂ スルーホール
１１，２１ａ，２１ｂ，３１ａ，３１ｂ 回路
１２ａ，２２ａ，３２ａ ＩＣ（磁場の影響を受けやすい電子部品）
１２ｂ，２２ｂ，３２ｂ，４２ｂ その他の電子部品
１３，２３，３３ アンテナコイル
１４，２４，３４ グランドループ配線
１４ａ，２４ａ，３４ａ 結合点 1, 2, 3, 4 Circuit boards 2a, 2b, 3a, 3b, 4a, 4b Through holes 11, 21a, 21b, 31a, 31b Circuits 12a, 22a, 32a ICs (electronic components susceptible to magnetic fields)
12b, 22b, 32b, 42b Other electronic components 13, 23, 33 Antenna coils 14, 24, 34 Ground loop wirings 14a, 24a, 34a

Claims (6)

記憶媒体との間で非接触に情報の送受信を行う非接触通信システムのリーダ／ライタ装置において、
前記情報の送受信のための処理を行う回路と、
この回路の周囲の近接位置に配置され、前記記録媒体と前記回路との間で情報の送受信を可能にするとともに、前記記録媒体に対して必要な電力の供給を行うアンテナコイルと、
前記回路内の接地配線の一部から延出し、少なくとも前記回路内に配置される電子部品のうち磁場の影響を受けやすい電子部品が配置された領域を取り囲むように、一周又は複数周する閉ループ状のグランドループ配線と、
を有することを特徴とする非接触通信システムのリーダ／ライタ装置。 In a reader / writer device of a non-contact communication system that performs non-contact transmission / reception of information with a storage medium,
A circuit that performs processing for transmission and reception of the information;
An antenna coil that is disposed in a proximity position around the circuit, enables transmission and reception of information between the recording medium and the circuit, and supplies necessary power to the recording medium;
A closed loop that extends from a part of the ground wiring in the circuit and surrounds at least one region of the electronic components arranged in the circuit that is susceptible to the influence of a magnetic field. Ground loop wiring,
A reader / writer apparatus for a non-contact communication system. 前記グランドループ配線を、前記回路上に配置された電子部品のうち最も磁場の影響を受けやすい電子部品の接地配線から延出させたことを特徴とする請求項１に記載の非接触通信システムのリーダ／ライタ装置。 2. The contactless communication system according to claim 1, wherein the ground loop wiring extends from a ground wiring of an electronic component that is most susceptible to a magnetic field among electronic components arranged on the circuit. Reader / writer device. 前記回路内の接地配線の一部が、前記グランドループ配線の一部を構成していることを特徴とする請求項１又は２に記載の非接触通信システムのリーダ／ライタ装置。 3. A reader / writer device for a contactless communication system according to claim 1, wherein a part of the ground wiring in the circuit constitutes a part of the ground loop wiring. 表裏両面に回路が形成された回路基板において、一面側から延出された前記グランドループ配線の一部が他面側を通過することを特徴とする請求項１〜３のいずれかに記載の非接触通信システムのリーダ／ライタ装置。 The circuit board in which circuits are formed on both front and back surfaces, a part of the ground loop wiring extending from one surface side passes through the other surface side. Reader / writer device for contact communication system. 複数枚の前記回路基板を積層する場合において、一の前記回路基板から延出する前記グランドループ配線の一部が、少なくとも一つの他の回路基板を通過することを特徴とする請求項１〜４のいずれかに記載の非接触通信システムのリーダ／ライタ装置。 5. When laminating a plurality of circuit boards, a part of the ground loop wiring extending from one circuit board passes through at least one other circuit board. A reader / writer device for a non-contact communication system according to any one of the above. 前記電子部品がトランジスタ又はＩＣであることを特徴とする請求項１〜５のいずれかに記載の非接触通信システムのリーダ／ライタ装置。 The reader / writer device for a non-contact communication system according to claim 1, wherein the electronic component is a transistor or an IC.
JP2006335808A 2006-12-13 2006-12-13 Reader / writer device for contactless communication system Expired - Fee Related JP4382081B2 (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10523258B2 (en) 2017-03-06 2019-12-31 Samsung Electronics Co., Ltd. Communication device to perform wireless communication and wireless power transfer, and electrode device to transmit and receive electrical signal from target

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10523258B2 (en) 2017-03-06 2019-12-31 Samsung Electronics Co., Ltd. Communication device to perform wireless communication and wireless power transfer, and electrode device to transmit and receive electrical signal from target
US10862525B2 (en) 2017-03-06 2020-12-08 Samsung Electronics Co., Ltd. Communication device to perform wireless communication and wireless power transfer, and electrode device to transmit and receive electrical signal from target

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