JP2000339428A - Method for generating thin antenna - Google Patents
Method for generating thin antennaInfo
- Publication number
- JP2000339428A JP2000339428A JP15289699A JP15289699A JP2000339428A JP 2000339428 A JP2000339428 A JP 2000339428A JP 15289699 A JP15289699 A JP 15289699A JP 15289699 A JP15289699 A JP 15289699A JP 2000339428 A JP2000339428 A JP 2000339428A
- Authority
- JP
- Japan
- Prior art keywords
- antenna
- base material
- thin
- loops
- loop
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
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- Credit Cards Or The Like (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、非接触ＩＣタグを
はじめとするＲＦ−ＩＤ（Ｒａｄｉｏ Ｆｒｅｑｕｅｎ
ｃｙ ＩＤｅｎｔｉｆｉｃａｔｉｏｎ）用などに用いる
ことのできる薄形アンテナを作成する方法に関するもの
である。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an RF-ID (Radio Frequency) including a non-contact IC tag.
The present invention relates to a method for producing a thin antenna that can be used for cy IDentification.
【０００２】[0002]
【発明が解決しようとする課題】従来、非接触ＩＣタグ
などの薄形の通信用品は内部にアンテナを備えてそのア
ンテナにより通信させるようにしており、一般にアンテ
ナの通信距離はアンテナの抵抗値が低いほど高感度とな
って長距離通信が可能なものであることから、このＲＦ
−ＩＤなどのアンテナを得る上でも抵抗値を下げる試み
がいろいろなされている。例えば、前記ＲＦ−ＩＤなど
のアンテナは導電インキをスクリーン印刷して形成した
り、蒸着、エッチングにて形成したりする手法が採られ
ていて、前述の抵抗値を下げるという点に関してはアン
テナ自体を構成している導電層の厚みを厚くすればよい
ことから、スクリーン印刷によるものではスクリーン版
の乳剤厚を厚くするように二回塗りや三回塗りを行い、
また、蒸着によるものであるならば導電層を得るための
蒸着膜を厚く蒸着形成し、エッチングによるものである
ならば導電層を得るための金属層を厚いものとすること
が行われている。しかし、スクリーン印刷によるもので
は数回の重ね刷りをすることから細線の形成が難しく作
成コストが高くなるという問題があり、蒸着によるもの
でも細線の形成が難しいものである。そして、エッチン
グによるものでは素材費が高くなるとともに形成時間が
長くなるという問題があった。Conventionally, a thin communication article such as a non-contact IC tag is provided with an antenna inside and communicates with the antenna. Generally, the communication distance of the antenna is determined by the resistance value of the antenna. The lower the sensitivity, the higher the sensitivity and the longer the distance.
Various attempts have been made to reduce the resistance value in obtaining an antenna such as an ID. For example, an antenna such as the RF-ID is formed by screen-printing conductive ink, or is formed by vapor deposition or etching. In terms of reducing the above-described resistance, the antenna itself needs to be formed. Since it is only necessary to increase the thickness of the constituent conductive layer, in the case of screen printing, two or three coatings are performed so as to increase the emulsion thickness of the screen plate,
In addition, a thick vapor deposition film for obtaining a conductive layer is formed by vapor deposition, and a thick metal layer for obtaining a conductive layer is obtained by etching. However, screen printing has the problem that it is difficult to form a fine line because of overprinting several times and the production cost is high. Even with vapor deposition, it is difficult to form a fine line. In addition, there is a problem that the material cost is increased and the forming time is longer in the case of etching.
【０００３】また、上記ＲＦ−ＩＤなどのアンテナを高
感度のものとする方法として複数のアンテナ用ループを
並列接続して抵抗値を上げずにループ長を長くする試み
があり、アンテナ用ループを形成する基材にスルーホー
ルを設けて、このスルーホールにより複数のアンテナ用
ループを接続するようにしたり、アンテナ用ループを形
成した複数の基材を重ね合わせアンテナ用ループの部分
を導電性のあるステープルにて一体的に止め付けて接続
する提案がなされているが、スルーホールやステープル
があるために表面が凸凹となり易いとともにアンテナ用
ループの位置合わせも難しいなどの難点があった。そこ
で、本発明は製造コストの引き上げや作成の手数を要す
ることなくアンテナの抵抗値を引き下げるようにするこ
とを課題とし、ＲＦ−ＩＤなどの用途に適した薄形アン
テナを安価に得ることを目的とするものである。Further, as a method of increasing the sensitivity of an antenna such as the RF-ID, there is an attempt to connect a plurality of antenna loops in parallel to increase the loop length without increasing the resistance value. A through hole is provided in the base material to be formed, and a plurality of antenna loops are connected by this through hole, or a plurality of base materials on which the antenna loop is formed are superposed to form a conductive portion of the antenna loop. Although there has been a proposal to integrally connect and connect with staples, there are drawbacks such as that the surface tends to be uneven due to through holes and staples and alignment of the antenna loop is difficult. In view of the above, an object of the present invention is to reduce the resistance of an antenna without increasing manufacturing costs or troublesome manufacturing, and to provide a low-cost antenna suitable for applications such as RF-ID. It is assumed that.
【０００４】[0004]
【課題を解決するための手段】本発明は上記課題を考慮
してなされたもので、シート状の基材の片面に導電層か
らなるアンテナ用ループを、該基材に設けた折り部を間
にする対称位置に対称パターンにして設け、少なくとも
一方のアンテナ用ループ形成面に糊を塗布し、前記アン
テナ用ループが内側となるように基材を折り部から折り
畳んで相対するアンテナ用ループを貼り合わせ接合した
ことを特徴とする薄形アンテナの作成方法を提供して、
上記課題を解消するものである。SUMMARY OF THE INVENTION The present invention has been made in consideration of the above problems, and has an antenna loop made of a conductive layer on one side of a sheet-like substrate and a folded portion provided on the substrate. A symmetrical pattern is provided at a symmetrical position, glue is applied to at least one of the antenna loop forming surfaces, and the base material is folded from the folded portion so that the antenna loop is inside, and the opposing antenna loop is attached. Providing a method of making a thin antenna characterized by being joined and joined,
It is intended to solve the above problem.
【０００５】[0005]
【発明の実施の形態】つぎに本発明を図示の実施の形態
に基づいて詳細に説明する。図中１は薄形アンテナであ
り、この薄形アンテナ１を得るにあたっては、まず、紙
や薄いフィルムなどからなるシート状の基材２の片面に
一対のアンテナ用ループ３を設ける。このアンテナ用ル
ープ３は導電インキをスクリーン印刷した導電層からな
るものであり、前記基材２を二分する位置に設けた折り
部４を間にする対称位置に対称パターンにして設ける。
つぎに、一方のアンテナ用ループ形成面５に接着剤や粘
着剤などからなる糊６を均一にして塗布する。そして、
前記アンテナ用ループ３が内側となるように基材２を折
り部４から折り畳んで相対するアンテナ用ループ３を前
記糊６を介して重ね合わせ、所要の圧力を加えて両アン
テナ用ループ３を貼り合わせ接合することによってこの
薄形アンテナ１が得られる。図３は上記方法により得ら
れた薄形アンテナ１の一部分の断面を示しており、相対
するアンテナ用ループ３を糊６によって貼り合わせるこ
とによって、微細な部分では相対するアンテナ用ループ
３同士が直接接合して導通状態が形成され、この相対し
た一対のアンテナ用ループ３が一体となって導電層を厚
くした一つのアンテナ用のループを形成しているもので
あり、これによって抵抗値が下がった薄形アンテナ１が
得られるようになる。なお、図においては発明の要旨を
明確にするために、ＩＣチップを設ける実装部分やルー
プの一部を跨ぐように配置される接続線部分は図示され
ていない。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the present invention will be described in detail with reference to the illustrated embodiments. In the drawing, reference numeral 1 denotes a thin antenna. To obtain the thin antenna 1, first, a pair of antenna loops 3 is provided on one surface of a sheet-like base material 2 made of paper or a thin film. The antenna loop 3 is formed of a conductive layer on which a conductive ink is screen-printed, and is provided in a symmetrical pattern at a symmetrical position between folding portions 4 provided at positions for bisecting the base material 2.
Next, a paste 6 made of an adhesive or a pressure-sensitive adhesive is uniformly applied to one of the antenna loop forming surfaces 5. And
The base material 2 is folded from the folded portion 4 so that the antenna loop 3 is on the inside, the opposing antenna loops 3 are overlapped via the glue 6, and both antenna loops 3 are attached by applying a required pressure. The thin antenna 1 is obtained by joining and joining. FIG. 3 shows a cross section of a part of the thin antenna 1 obtained by the above method. By bonding the opposing antenna loops 3 with glue 6, the opposing antenna loops 3 are directly connected to each other in a fine part. A conductive state is formed by joining, and the pair of opposed antenna loops 3 is integrally formed to form a single antenna loop having a thick conductive layer, thereby reducing the resistance value. The thin antenna 1 can be obtained. In the drawings, for clarity of the gist of the invention, a mounting portion where an IC chip is provided and a connection line portion which is arranged so as to straddle a part of a loop are not shown.
【０００６】上記糊としては住友スリーエム株式会社製
のスプレー糊５５を用いることができ、この他として以
下のものをスプレー手法、スクリーン印刷手法、グラビ
アコーティング手法によりアンテナ用ループ形成面に塗
布することができる。また、アンテナ用ループが設けら
れている基材の片面全面に塗布してもよく、さらに、面
状に塗布する他、ドット、細線のようなパターンで塗布
することも可能である。As the glue, a spray glue 55 manufactured by Sumitomo 3M Limited can be used. In addition, the following glue can be applied to the antenna loop forming surface by spraying, screen printing, or gravure coating. it can. Further, it may be applied to the entire surface of one side of the base material on which the antenna loop is provided, and may be applied in a pattern such as a dot or a thin line in addition to the application in a planar shape.
【０００７】 合成樹脂ラテックス 三菱化学ビーエーエスエフ株式会社製 アクロナールＹＪ２３０１Ｄ 日本合成ゴム株式会社製 ＡＥ２００、ＡＥ５１７ 日信化学工業株式会社製 ビニブラン２７０ 第一工業製薬株式会社製 スーパーフレックスＳＦ１１０ 天然ゴムラテックス ポリブタジエン、ポリビニルエーテル、ポリビニルアル
コール、スチレンレマイン酸を溶剤で溶いたもの。Synthetic resin latex Acronal YJ2301D manufactured by Mitsubishi Chemical BSF Co., Ltd. AE200, AE517 manufactured by Nippon Synthetic Rubber Co., Ltd. Vinibulan 270 manufactured by Nissin Chemical Industry Co., Ltd. Superflex SF110 manufactured by Daiichi Kogyo Seiyaku Co., Ltd. Natural rubber latex polybutadiene, polyvinyl ether , Polyvinyl alcohol and styrene reamic acid dissolved in a solvent.
【０００８】貼り合わせに関して塗布した糊６が薄い場
合（〜３ｇ／ｃｍ2 ）、そのまま貼り合わせて軽く押し
付ける（〜２Ｋｇ／ｃｍ2 ）だけでよい。また、糊６が
厚い場合には、熱と圧力との両者を加えるようにすれば
よい。（例えば、５Ｋｇ／ｃｍ2 ）、１３０℃を３０
秒）When the glue 6 applied for bonding is thin (up to 3 g / cm 2 ), it is sufficient to simply bond and press lightly (up to 2 kg / cm 2 ). When the paste 6 is thick, both heat and pressure may be applied. (For example, 5 kg / cm 2 ) and 130 ° C. for 30
Seconds)
【０００９】つぎにアンテナ用ループの形状を１ｍｍ×
１０００ｍｍの櫛形のパターンとしたものから上記方法
により薄形アンテナを得るようにし、貼り合わせに際し
て軽く押さえ付けた場合、熱と圧力を加えた場合、さら
に、アンテナ用ループそれぞれ（アンテナ１、アンテナ
２）の抵抗値を計測し、その結果を表１に示す。糊の塗
布形態は、それぞれ薄塗り、厚塗り、パターン塗工とし
た。導電インキは株式会社アサヒ化学研究所ＬＳ４１５
Ｃ−Ｍとし、スクリーン印刷にて乳剤厚１５μｍとして
アンテナ用ループを形成したものである。Next, the shape of the antenna loop is set to 1 mm ×
A thin antenna is obtained by the above-mentioned method from a 1000 mm comb-shaped pattern. When the antenna is lightly pressed at the time of bonding, when heat and pressure are applied, and further, each antenna loop (antenna 1 and antenna 2) Were measured, and the results are shown in Table 1. The application form of the paste was thin coating, thick coating, and pattern coating, respectively. Conductive inks are available from Asahi Chemical Laboratory LS415
CM, and an antenna loop was formed with an emulsion thickness of 15 μm by screen printing.
【００１０】[0010]
【表１】 [Table 1]
【００１１】上記表１に示されているように、貼り合わ
せにより抵抗値が下がることが分かり、特に熱と圧力を
加えた場合にはすべてにおいてアンテナ用ループ単体の
ときの抵抗値の半分の抵抗値となり、抵抗の並列接続時
のオームの法則に合致した値であって薄形アンテナの抵
抗値を下げる効果があることが確認できた。なお、糊・
厚塗りにおける貼り合わせ後では二つのアンテナ用ルー
プが導通せず、一方のアンテナ用ループの抵抗値が計測
された。As shown in Table 1 above, it was found that the resistance value was lowered by bonding, and in particular, when heat and pressure were applied, the resistance value was half that of the antenna loop alone in all cases. It was confirmed that it was a value that conformed to Ohm's law when resistors were connected in parallel, and had the effect of lowering the resistance of the thin antenna. In addition, glue
After bonding in thick coating, the two antenna loops did not conduct, and the resistance value of one of the antenna loops was measured.
【００１２】[0012]
【発明の効果】以上説明したように、本発明の薄形アン
テナの作成方法によれば、シート状の基材の片面に導電
層からなるアンテナ用ループを、該基材に設けた折り部
を間にする対称位置に対称パターンにして設け、少なく
とも一方のアンテナ用ループ形成面に糊を塗布し、前記
アンテナ用ループが内側となるように基材を折り部から
折り畳んで相対するアンテナ用ループを貼り合わせ接合
したことを特徴とするものである。このように折り部か
ら二つのアンテナ用ループを重ね合わせ糊を介して貼り
合わせるという極めて簡易な方法により低抵抗値の薄形
アンテナが得られ、また、位置ずれを生じさせることな
く二つのアンテナ用ループを確実に重ね合わせることが
でき、手数を要することなく薄形アンテナが得られるよ
うになる。そして、前記二つのアンテナ用ループそれぞ
れの抵抗値を同一として熱、圧を加えて貼り合わせ接合
することで１／２の抵抗値の薄形アンテナが得られるこ
とから、安価でありながら抵抗値が高い素材を用いてア
ンテナ用ループを形成しても薄形アンテナでの抵抗値が
１／２となって、高価で抵抗値が低い素材を用いてなる
単一のアンテナと同様の特性を持たせることができる。
さらに抵抗の並列接続時のオームの法則に基づいて、ア
ンテナ用ループそれぞれの抵抗値を選択することで薄形
アンテナの抵抗値を設定でき、アンテナ用ループの導電
素材を種類多く用意しなくとも用途に応じた薄形アンテ
ナの抵抗値の設定が行い易くなるなど、実用性に優れた
効果を奏するものである。As described above, according to the method for producing a thin antenna of the present invention, an antenna loop made of a conductive layer is formed on one surface of a sheet-like base material, and the folded portion provided on the base material is formed. Provided in a symmetric pattern at a symmetrical position between them, apply glue to at least one antenna loop forming surface, and fold the base material from the folded portion so that the antenna loop is on the inside, thereby forming the opposing antenna loop. It is characterized by being bonded and joined. In this manner, a thin antenna having a low resistance value can be obtained by an extremely simple method of laminating two antenna loops from the folded portion and pasting them together via glue. The loops can be reliably overlapped, and a thin antenna can be obtained without requiring any trouble. Then, by applying heat and pressure to the two antenna loops with the same resistance value and bonding them together, a thin antenna having a resistance value of 1/2 can be obtained. Even if an antenna loop is formed using a high material, the resistance value of a thin antenna is reduced to half, and the same characteristics as a single antenna using a material that is expensive and has a low resistance value are provided. be able to.
Furthermore, the resistance value of a thin antenna can be set by selecting the resistance value of each antenna loop based on Ohm's law when resistors are connected in parallel, making it possible to use the antenna loop without preparing many types of conductive materials. This makes it possible to easily set the resistance value of the thin antenna in accordance with the above-mentioned conditions, and provides an effect excellent in practicality.
【図１】本発明に係る薄形アンテナの作成方法の一例を
示す説明図である。FIG. 1 is an explanatory diagram showing an example of a method for producing a thin antenna according to the present invention.
【図２】本発明によりなる薄形アンテナを示す説明図で
ある。FIG. 2 is an explanatory view showing a thin antenna according to the present invention.
【図３】薄形アンテナの一部を断面で示す説明図であ
る。FIG. 3 is an explanatory view showing a part of a thin antenna in a cross section.
１…薄形アンテナ ２…基材 ３…アンテナ用ループ ４…折り部 ５…アンテナ用ループ形成面 ６…糊 DESCRIPTION OF SYMBOLS 1 ... Thin antenna 2 ... Base material 3 ... Antenna loop 4 ... Folding part 5 ... Antenna loop forming surface 6 ... Glue
Claims (1)
ンテナ用ループを、該基材に設けた折り部を間にする対
称位置に対称パターンにして設け、少なくとも一方のア
ンテナ用ループ形成面に糊を塗布し、前記アンテナ用ル
ープが内側となるように基材を折り部から折り畳んで相
対するアンテナ用ループを貼り合わせ接合したことを特
徴とする薄形アンテナの作成方法。An antenna loop comprising a conductive layer is provided on one surface of a sheet-like base material in a symmetric pattern at a symmetrical position between folded portions provided on the base material, and at least one antenna loop formation is performed. A method for producing a thin antenna, comprising applying glue to a surface, folding a base material from a folded portion such that the antenna loop is on the inside, and bonding and joining the opposing antenna loops.
Priority Applications (21)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15289699A JP4216951B2 (en) | 1999-05-31 | 1999-05-31 | How to make a thin antenna |
| KR1019990041444A KR100629923B1 (en) | 1998-09-30 | 1999-09-28 | Conductive paste, curing method therof, method for fabricating antenna for contactless data transmitter-receiver, and contactless data transmitter-receiver |
| CA002628782A CA2628782C (en) | 1998-09-30 | 1999-09-29 | Method of forming antenna for radio frequency identification medium employing conductive paste, and method for mounting ic chip onto circuit on substrate |
| EP99119436A EP0991014B1 (en) | 1998-09-30 | 1999-09-29 | Conductive paste and method of forming an antenna for a transponder |
| DE69928346T DE69928346T2 (en) | 1998-09-30 | 1999-09-29 | Conductive paste and method of making a transponder antenna |
| EP04017379A EP1484714A1 (en) | 1998-09-30 | 1999-09-29 | Conductive paste and method of forming antenna for transponder |
| EP04017373A EP1475743B1 (en) | 1998-09-30 | 1999-09-29 | Method of curing conductive paste and method of forming antenna for transponder |
| EP04017380A EP1486912A1 (en) | 1998-09-30 | 1999-09-29 | Conductive paste and method of forming antenna for transponder |
| CA002284978A CA2284978C (en) | 1998-09-30 | 1999-09-29 | Conductive paste |
| DE69935022T DE69935022T2 (en) | 1998-09-30 | 1999-09-29 | Conductive paste and method of making a transponder antenna |
| DE69935021T DE69935021T2 (en) | 1998-09-30 | 1999-09-29 | Method for curing conductive paste and method for producing a transponder antenna |
| US09/408,231 US6165386A (en) | 1998-09-30 | 1999-09-29 | Photosetting conductive paste |
| EP04017374A EP1484713B1 (en) | 1998-09-30 | 1999-09-29 | Conductive paste and method of forming an antenna for transponder |
| CNB991224639A CN1184266C (en) | 1998-09-30 | 1999-09-30 | Conductive paste and its solidifying method, information receiver-transmitter and antenna forming method |
| SG1999004861A SG74754A1 (en) | 1998-09-30 | 1999-09-30 | Conductive paste and conductive paste curing method method of forming antenna for radio frequency identification medium employing conductive paste and radio frequency identification medium |
| SG200200080A SG115440A1 (en) | 1998-09-30 | 1999-09-30 | Conductive paste and conductive paste curing method, method of forming antenna for radio frequency identification medium employing conductive paste, and radio frequency identification medium |
| SG200200081A SG105526A1 (en) | 1998-09-30 | 1999-09-30 | Conductive paste and conductive paste curing method, method of forming antenna for radio frequency identificaition medium employing conductive paste, and radio frequency identification medium |
| HK00105666A HK1026967A1 (en) | 1998-09-30 | 2000-09-08 | Conductive paste and method of forming an antenna for a transponder |
| HK04109657A HK1067437A1 (en) | 1998-09-30 | 2004-12-07 | Method of curing conductive paste and method of forming antenna for transponder |
| HK04109838A HK1067754A1 (en) | 1998-09-30 | 2004-12-13 | Conductive paste and method of forming an antenna for transponder |
| KR1020060034659A KR100692926B1 (en) | 1998-09-30 | 2006-04-17 | Conductive paste, curing method therof, method for fabricating antenna for contactless data transmitter-receiver, and contactless data transmitter-receiver |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15289699A JP4216951B2 (en) | 1999-05-31 | 1999-05-31 | How to make a thin antenna |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2000339428A true JP2000339428A (en) | 2000-12-08 |
| JP4216951B2 JP4216951B2 (en) | 2009-01-28 |
Family
ID=15550509
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15289699A Expired - Fee Related JP4216951B2 (en) | 1998-09-30 | 1999-05-31 | How to make a thin antenna |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP4216951B2 (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20020025923A (en) * | 2002-02-21 | 2002-04-04 | 양홍두 | Inner antenna assembly inside folder type radiotelephone |
| JP2002200870A (en) * | 2000-12-28 | 2002-07-16 | Toppan Forms Co Ltd | Sheet for postcard |
| JP2003006594A (en) * | 2001-06-22 | 2003-01-10 | Toppan Forms Co Ltd | Formation method for rf-id medium using both-side tape |
| JP2008187741A (en) * | 2005-01-31 | 2008-08-14 | Fujitsu Component Ltd | Antenna apparatus |
| DE102007034173A1 (en) | 2007-07-23 | 2009-01-29 | Giesecke & Devrient Gmbh | Energy absorption of contactless data carriers |
| JP2009093180A (en) * | 2007-10-08 | 2009-04-30 | G-Time Electronic Co Ltd | Sensing type learning card and learning system thereof |
| JP2009131610A (en) * | 2007-09-21 | 2009-06-18 | Astro Corp | System and method for rendering game piece |
| US7986272B2 (en) | 2005-01-31 | 2011-07-26 | Fujitsu Component Limited | Antenna apparatus and electronic device |
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1999
- 1999-05-31 JP JP15289699A patent/JP4216951B2/en not_active Expired - Fee Related
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002200870A (en) * | 2000-12-28 | 2002-07-16 | Toppan Forms Co Ltd | Sheet for postcard |
| JP4582741B2 (en) * | 2000-12-28 | 2010-11-17 | トッパン・フォームズ株式会社 | Postcard sheet and postcard |
| JP2003006594A (en) * | 2001-06-22 | 2003-01-10 | Toppan Forms Co Ltd | Formation method for rf-id medium using both-side tape |
| KR20020025923A (en) * | 2002-02-21 | 2002-04-04 | 양홍두 | Inner antenna assembly inside folder type radiotelephone |
| JP2008187741A (en) * | 2005-01-31 | 2008-08-14 | Fujitsu Component Ltd | Antenna apparatus |
| US7986272B2 (en) | 2005-01-31 | 2011-07-26 | Fujitsu Component Limited | Antenna apparatus and electronic device |
| DE102007034173A1 (en) | 2007-07-23 | 2009-01-29 | Giesecke & Devrient Gmbh | Energy absorption of contactless data carriers |
| EP2023464A2 (en) | 2007-07-23 | 2009-02-11 | Giesecke & Devrient GmbH | Energy consumption of contactless data carriers |
| JP2009131610A (en) * | 2007-09-21 | 2009-06-18 | Astro Corp | System and method for rendering game piece |
| JP2009093180A (en) * | 2007-10-08 | 2009-04-30 | G-Time Electronic Co Ltd | Sensing type learning card and learning system thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| JP4216951B2 (en) | 2009-01-28 |
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