JP2004295297A - Radio tag - Google Patents
Radio tag Download PDFInfo
- Publication number
- JP2004295297A JP2004295297A JP2003084384A JP2003084384A JP2004295297A JP 2004295297 A JP2004295297 A JP 2004295297A JP 2003084384 A JP2003084384 A JP 2003084384A JP 2003084384 A JP2003084384 A JP 2003084384A JP 2004295297 A JP2004295297 A JP 2004295297A
- Authority
- JP
- Japan
- Prior art keywords
- wireless tag
- antenna
- mhz
- conductor
- chip
- 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
Links
- 239000004020 conductor Substances 0.000 claims abstract description 34
- 239000000758 substrate Substances 0.000 claims abstract description 11
- 239000000696 magnetic material Substances 0.000 claims description 4
- 238000010586 diagram Methods 0.000 description 22
- 230000005540 biological transmission Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000001105 regulatory effect Effects 0.000 description 3
- 239000003990 capacitor Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000001276 controlling effect Effects 0.000 description 1
- 239000003989 dielectric material Substances 0.000 description 1
Images
Landscapes
- Details Of Aerials (AREA)
- Near-Field Transmission Systems (AREA)
Abstract
Description
【0001】
【発明の属する技術分野】
本発明は、内部に少なくとも1つのICチップ、およびアンテナを保持し、データを無線で通信することが可能な無線タグに関する。
【0002】
【従来の技術】
情報を記憶できるICとアンテナからなる無線タグは、電波によって、質問器と呼ばれる無線機とデータを送受信することができる。このような無線タグは、例えば、特許文献1に示されている。そのうち特に、電波の周波数として300MHz以上を使用し、内部に電源を持たない無線タグは、質問器との通信可能距離が長く、価格も比較的廉価であることから、バーコードの置き換え用途などに考えられている。このような無線タグは、特許文献2に示されている。
【0003】
【特許文献1】
特許2553641号公報
【特許文献2】
特開2002−298106号公報
【0004】
無線タグのICを駆動する電源としては、無線タグ内部に電源を持たない場合は、質問器からの電波を、IC内部のダイオードやコンデンサにより直流に変換して電圧を得る方式が取られる。無線タグ内部に電源を持つ場合、電源としては、ボタン型電池やフィルム状電池、大容量のコンデンサなどが用いられる。
【0005】
無線タグと、質問器との通信に使われる電波は、送信電力が大きいほど、無線タグと質問器との通信距離が長くなる。また、通信の周波数が低いほど、空気中の伝播損失が小さいため、通信距離は長くなる。ところが、使用できる電波の周波数とその出力レベルに関しては、国ごとに定められた規制値があり、それぞれの国で定められた規制値のなかで、最大の効果が得られるような周波数、送信電力が選ばれ、無線タグと質問器との通信系が設計される。
【0006】
図10は、従来の無線タグの説明図である。また、図11は、図10に示す従来の無線タグのアンテナのインピーダンス特性を示す図である。図11に示すように、従来の無線ダグは、ICチップとアンテナの、ある1つの周波数帯のみで整合が測られている。
【0007】
【発明が解決しようとする課題】
無線タグと質問器との通信に使用される電波の周波数は、各国の規制値に従うため、国によって使用する電波が異なる可能性がある。その場合、ある国の規制に従って使用されている無線タグが、別のある国では規制の問題により使用できないという事態が起きる。例えば、2003年1月時点において、915MHz帯は、米国において使用可能であるが、日本では使用できないという問題がある。
【0008】
また、電波の干渉の問題がある。無線タグ用に使用できる帯域は、他の無線通信機にも使用されている場合がある。このような場合、お互いの通信に影響を与えることがある。例えば、2.45GHz帯域は無線タグ用に使用可能であるが、無線LANや電子レンジなど各種機器においても使用されている。特に、無線LANと無線タグは、使用される環境が近いことが予想され、相互の干渉という問題がある。
【0009】
本発明の目的は、複数の周波数帯域において、通信を可能とする構成の無線タグを提供することである。
【0010】
【課題を解決するための手段】
本発明の無線タグは、1つのICチップ、およびデータを送受信するアンテナからなる。このうちICチップは、データを保持する記憶領域と、送受信を制御する回路部からなる。異なる周波数帯域に対応するために、回路部の主な回路は、異なる周波数帯で動作するような回路とする。
【0011】
前記アンテナのインピーダンスを、使用する複数の周波数帯域で、ICチップのインピーダンスとマッチングが取れるよう設計することにより、複数の周波数帯で動作する無線タグができる。アンテナのインピーダンスをあわせる手段としては、アンテナパターンの調整や、誘電体や磁性体を組み合わせる等の方法が取られる。
【0012】
即ち、本発明は、基板と前記基板上に形成されたアンテナと、ICチップとで構成された無線タグであって、複数の周波数帯で、インピーダンスの整合がとれる無線タグである。
【0013】
また、本発明は、前記アンテナが、誘電体もしくは磁性体上に形成された無線タグである。
【0014】
また、本発明は、前記無線タグにおいて、通信に使用する周波数帯のうち1つは800MHz乃至1000MHzの周波数帯であり、1つは2400MHz乃至2500MHzの周波数帯である無線タグである。
【0015】
また、本発明は、前記無線タグにおいて、通信に使用する周波数帯のうち1つは2400MHz乃至2500MHzの周波数帯であり、1つは5000MHz乃至6000MHzの周波数帯であることを特徴とする無線タグである。
【0016】
また、本発明は、前記アンテナは、ほぼ1/2波長の長さのライン形状で、その中央部にて給電を受ける第1の導体部と、前記第1の導体部と電気的に接続し、ほぼ直角方向にでた第2の導体と第3の導体とで形成された無線タグである。
【0017】
また、本発明は、前記アンテナは、ほぼ1/2波長の長さのループ形状で、前記ループ形状の一方の辺の中央部にて給電を受ける第1の導体部と、前記第1の導体部の給電点の近傍付近に電気的に接続されたほぼL型の第2の導体部とで形成された無線タグである。
【0018】
また、本発明は、前記アンテナは、約1/2波長の長さでほぼ平行な対辺を持つループ形状で、前記ループ形状の一方の辺の中央部にて給電を受ける第1の導体部と、前記第1の導体部の近傍に配置されたライン形状の第2の導体部とで形成された無線タグである。
【0019】
【発明の実施の形態】
本発明の実施の形態による無線タグついて、図面を参照して説明する。
【0020】
(実施の形態1)
図1は、本発明の実施の形態1による無線タグの説明図である。アンテナ3は、ほぼ1/2波長の長さの直線形状で、長さが160mmであり、その中央部にて給電を受ける第1の導体部と、前記第1の導体部より、ほぼ直角方向に出た第2の導体と第3の導体とで形成される。また、前記無線タグにおいて、前記アンテナが、誘電体もしくは磁性体上に形成されている。
【0021】
図1の無線タグ1において、図中ICチップ2とアンテナ3は給電点4a,4bで電気的に接続される。アンテナのインピーダンスは、ICのインピーダンスとマッチングが取れるよう調整される。図1において、ICチップのインピーダンスは50オームである。図2は、図1に示す無線タグのアンテナのインピーダンス特性を示す図である。図2に示すように、915MHzにおいて50オーム、2450MHzにおいて50+j2オーム(j2はインピーダンスの虚数部を示す)である。つまり、915MHzと2450MHzの2つ帯域でICチップとアンテナのインピーダンスは、ほぼ整合が取れており、この2つの帯域の周波数で通信可能な無線タグとなる。
【0022】
(実施の形態2)
図3は、本発明の実施の形態2による無線タグの説明図である。図3において、アンテナ3は、ほぼ1/2波長の長さのループ状で、その長さは160mmであり、ほぼ平行な対辺を持つループ状の一方の長辺の中央部にて給電を受ける前記給電点4a,4bの近傍付近に電気的に接続されたL型の第2の導体部とで形成された無線タグである。
【0023】
図4は、図3の無線ダグのICチップのインピーダンス特性を示す図である。図4に示すように、ICチップのインピーダンスは、915MHzにおいて55+j110オーム、2450MHzにおいて30オームである。
【0024】
図5は、図3で示すアンテナのインピーダンス特性を示す図である。アンテナのインピーダンスは、915MHzにおいて53−j107オーム、2450MHzにおいて30−j2オームであり、ICチップとアンテナのインピーダンスは、ほぼ整合が取れている。
【0025】
(実施の形態3)
図6は、本発明の実施の形態3による無線タグの説明図である。図6において、アンテナ3は、約1/2波長の長さの四角形状で、その長さは、50mmであり、前記四角形状の一方の長辺の中央部にて給電を受ける第1の導体部と、前記第1の導体部の長辺と平行に配置され、長さが、ほぼ1/2波長直線形状の第2の導体部とで形成された無線タグである。
【0026】
図7は、図6の無線ダグのICチップのインピーダンス特性を示す図である。図7に示すように、ICチップのインピーダンスは、2450MHzにおいて30オーム、5800MHzにおいて11+j28オームである。
【0027】
図8は、図6に示すアンテナのインピーダンス特性を示す図である。アンテナのインピーダンスは、2450MHzにおいて30−j3オーム、5800MHzにおいて10−j32オームであり、ICチップとアンテナのインピーダンスは、ほぼ整合が取れている。
【0028】
(実施の形態4)
図9は、本発明の実施の形態4による無線タグの説明図である。図9の無線タグは、基板と前記基板状に形成されたアンテナと、ICチップとで構成された無線タグであって、前記アンテナは、約1/2波長の長さの四角形状で、前記四角形状の一方の長辺の中央部にて給電を受ける第1の導体部と、前記第1の導体部の給電点の近傍付近に電気的に接続されたL型の第2の導体部とで形成された無線タグである。図9の無線ダグは、アンテナが誘電体基板上に形成されており、ICとのマッチングが取られている。基板の誘電率を利用し、アンテナのインピーダンスを調整する。
【0029】
【発明の効果】
本発明により、データの通信が、複数の周波数帯で可能である無線タグを提供することが可能となる。これにより、たとえば900MHz帯と2450MHz帯で動作する無線タグであれば、ある国で、900MHzの電波で書き込んだデータを、他の国で900MHzの電波の使用が認められない場合でも2450MHzの電波でデータを読み出すことが可能となる。また、900MHz帯に雑音が多いと判断された場合、周波数を2450MHz帯に切り替えてデータを読み出すことも可能となる。従って、本発明によれば、複数の周波数帯域において、通信を可能とする構成の無線タグを提供することができる。
【図面の簡単な説明】
【図1】本発明の実施の形態1による無線タグの説明図。
【図2】図1に示す無線タグでのアンテナのインピーダンス特性を示す図。
【図3】本発明の実施の形態2による無線タグの説明図。
【図4】図3に示す無線タグでのICチップのインピーダンス特性を示す図。
【図5】図3に示す無線タグでのアンテナのインピーダンス特性を示す図。
【図6】本発明の実施の形態3による無線タグの説明図。
【図7】図6に示す無線タグでのICチップのインピーダンス特性を示す図。
【図8】図6に示す無線タグでのアンテナのインピーダンス特性を示す図。
【図9】本発明の実施の形態4による無線タグの説明図。
【図10】従来の無線タグの説明図。
【図11】図10に示す従来の無線タグのアンテナのインピーダンス特性を示す図。
【符号の説明】
1 無線タグ
2 ICチップ
3 アンテナ
4a,4b 給電点
5 インピーダンスの実数部
6 インピーダンスの虚数部
7 基板[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a wireless tag capable of holding at least one IC chip and an antenna therein and communicating data wirelessly.
[0002]
[Prior art]
A wireless tag including an IC capable of storing information and an antenna can transmit and receive data to and from a wireless device called an interrogator by radio waves. Such a wireless tag is disclosed in Patent Document 1, for example. In particular, wireless tags that use a radio frequency of 300 MHz or more and do not have a power supply inside have a long communicable distance with the interrogator and are relatively inexpensive. It is considered. Such a wireless tag is disclosed in
[0003]
[Patent Document 1]
Japanese Patent No. 25535641 [Patent Document 2]
Japanese Patent Application Laid-Open No. 2002-298106
As a power source for driving the IC of the wireless tag, when there is no power source inside the wireless tag, a method is used in which radio waves from the interrogator are converted to direct current by a diode or a capacitor inside the IC to obtain a voltage. When a power supply is provided inside the wireless tag, a button-type battery, a film battery, a large-capacity capacitor, or the like is used as the power supply.
[0005]
The communication distance between the wireless tag and the interrogator increases as the transmission power of the radio wave used for communication between the wireless tag and the interrogator increases. Further, the lower the communication frequency, the smaller the propagation loss in the air, and thus the longer the communication distance. However, there are regulated values for radio wave frequencies that can be used and their output levels, which are set in each country. Among the regulated values set in each country, the frequency and transmission power at which the maximum effect can be obtained Is selected, and a communication system between the wireless tag and the interrogator is designed.
[0006]
FIG. 10 is an explanatory diagram of a conventional wireless tag. FIG. 11 is a diagram illustrating impedance characteristics of the antenna of the conventional wireless tag illustrated in FIG. As shown in FIG. 11, in a conventional wireless doug, matching is measured only in a certain frequency band of an IC chip and an antenna.
[0007]
[Problems to be solved by the invention]
Since the frequency of the radio wave used for communication between the wireless tag and the interrogator complies with the regulation value of each country, the radio wave used may differ from country to country. In that case, a situation may occur in which a wireless tag used in accordance with the regulations of one country cannot be used in another country due to a regulatory problem. For example, as of January 2003, the 915 MHz band can be used in the United States, but cannot be used in Japan.
[0008]
There is also a problem of radio wave interference. The band that can be used for the wireless tag may be used by another wireless communication device. In such a case, mutual communication may be affected. For example, the 2.45 GHz band can be used for wireless tags, but is also used in various devices such as wireless LANs and microwave ovens. In particular, it is expected that wireless LANs and wireless tags will be used in similar environments, and there is a problem of mutual interference.
[0009]
An object of the present invention is to provide a wireless tag configured to enable communication in a plurality of frequency bands.
[0010]
[Means for Solving the Problems]
The wireless tag of the present invention includes one IC chip and an antenna for transmitting and receiving data. The IC chip includes a storage area for storing data and a circuit unit for controlling transmission and reception. In order to support different frequency bands, a main circuit of the circuit unit is a circuit that operates in different frequency bands.
[0011]
By designing the impedance of the antenna to match the impedance of the IC chip in a plurality of frequency bands to be used, a wireless tag operating in a plurality of frequency bands can be obtained. As a method of adjusting the impedance of the antenna, a method of adjusting an antenna pattern, combining a dielectric or a magnetic material, or the like is used.
[0012]
That is, the present invention is a wireless tag including a substrate, an antenna formed on the substrate, and an IC chip, wherein the impedance can be matched in a plurality of frequency bands.
[0013]
Further, the present invention is the wireless tag in which the antenna is formed on a dielectric or a magnetic material.
[0014]
Further, according to the present invention, in the wireless tag, one of frequency bands used for communication is a frequency band of 800 MHz to 1000 MHz, and one is a frequency band of 2400 MHz to 2500 MHz.
[0015]
In the wireless tag according to the present invention, one of frequency bands used for communication is a frequency band of 2400 MHz to 2500 MHz, and one is a frequency band of 5000 MHz to 6000 MHz. is there.
[0016]
Further, according to the present invention, the antenna has a line shape having a length of approximately 波長 wavelength, and a first conductor portion to which power is supplied at a central portion thereof, and an electrical connection with the first conductor portion. , A wireless tag formed by a second conductor and a third conductor which are substantially perpendicular to each other.
[0017]
Also, the present invention is characterized in that the antenna has a loop shape having a length of approximately 波長 wavelength, a first conductor portion receiving power at a center of one side of the loop shape, And a substantially L-shaped second conductor electrically connected to the vicinity of a power supply point of the wireless tag.
[0018]
Also, the present invention is characterized in that the antenna has a loop shape having a length of about 波長 wavelength and having substantially parallel opposite sides, and a first conductor portion which receives power at a center of one side of the loop shape. , And a line-shaped second conductor disposed near the first conductor.
[0019]
BEST MODE FOR CARRYING OUT THE INVENTION
A wireless tag according to an embodiment of the present invention will be described with reference to the drawings.
[0020]
(Embodiment 1)
FIG. 1 is an explanatory diagram of a wireless tag according to Embodiment 1 of the present invention. The
[0021]
In the wireless tag 1 of FIG. 1, the
[0022]
(Embodiment 2)
FIG. 3 is an explanatory diagram of the wireless tag according to the second embodiment of the present invention. In FIG. 3, the
[0023]
FIG. 4 is a diagram showing the impedance characteristics of the wireless doug IC chip of FIG. As shown in FIG. 4, the impedance of the IC chip is 55 + j110 ohm at 915 MHz and 30 ohm at 2450 MHz.
[0024]
FIG. 5 is a diagram showing impedance characteristics of the antenna shown in FIG. The impedance of the antenna is 53-j107 ohm at 915 MHz and 30-j2 ohm at 2450 MHz, and the impedance of the IC chip and the antenna is almost matched.
[0025]
(Embodiment 3)
FIG. 6 is an explanatory diagram of the wireless tag according to the third embodiment of the present invention. In FIG. 6, the
[0026]
FIG. 7 is a diagram showing impedance characteristics of the wireless doug IC chip of FIG. As shown in FIG. 7, the impedance of the IC chip is 30 ohms at 2450 MHz and 11 + j28 ohms at 5800 MHz.
[0027]
FIG. 8 is a diagram showing impedance characteristics of the antenna shown in FIG. The impedance of the antenna is 30-j3 ohm at 2450 MHz and 10-j32 ohm at 5800 MHz, and the impedance of the IC chip and the antenna are almost matched.
[0028]
(Embodiment 4)
FIG. 9 is an explanatory diagram of the wireless tag according to the fourth embodiment of the present invention. The wireless tag of FIG. 9 is a wireless tag including a substrate, an antenna formed in the shape of the substrate, and an IC chip, wherein the antenna has a rectangular shape having a length of about 波長 wavelength, A first conductor that receives power at the center of one of the long sides of the square, and an L-shaped second conductor that is electrically connected in the vicinity of the power supply point of the first conductor; This is a wireless tag formed by: The wireless doug shown in FIG. 9 has an antenna formed on a dielectric substrate and is matched with an IC. The impedance of the antenna is adjusted using the dielectric constant of the substrate.
[0029]
【The invention's effect】
According to the present invention, it is possible to provide a wireless tag capable of data communication in a plurality of frequency bands. Thus, for example, in the case of a wireless tag operating in the 900 MHz band and the 2450 MHz band, data written by a 900 MHz radio wave in one country can be transmitted by a 2450 MHz radio wave even when the use of the 900 MHz radio wave is not permitted in another country. Data can be read. If it is determined that there is much noise in the 900 MHz band, the frequency can be switched to the 2450 MHz band to read data. Therefore, according to the present invention, it is possible to provide a wireless tag configured to enable communication in a plurality of frequency bands.
[Brief description of the drawings]
FIG. 1 is an explanatory diagram of a wireless tag according to a first embodiment of the present invention.
FIG. 2 is a diagram illustrating impedance characteristics of an antenna in the wireless tag illustrated in FIG. 1;
FIG. 3 is an explanatory diagram of a wireless tag according to a second embodiment of the present invention.
FIG. 4 is a diagram showing impedance characteristics of an IC chip in the wireless tag shown in FIG. 3;
FIG. 5 is a diagram illustrating impedance characteristics of an antenna in the wireless tag illustrated in FIG. 3;
FIG. 6 is an explanatory diagram of a wireless tag according to a third embodiment of the present invention.
FIG. 7 is a diagram illustrating impedance characteristics of an IC chip in the wireless tag illustrated in FIG. 6;
FIG. 8 is a diagram illustrating impedance characteristics of an antenna in the wireless tag illustrated in FIG. 6;
FIG. 9 is an explanatory diagram of a wireless tag according to a fourth embodiment of the present invention.
FIG. 10 is an explanatory diagram of a conventional wireless tag.
11 is a diagram showing impedance characteristics of the antenna of the conventional wireless tag shown in FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1
Claims (7)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2003084384A JP4097139B2 (en) | 2003-03-26 | 2003-03-26 | Wireless tag |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2003084384A JP4097139B2 (en) | 2003-03-26 | 2003-03-26 | Wireless tag |
Publications (2)
Publication Number | Publication Date |
---|---|
JP2004295297A true JP2004295297A (en) | 2004-10-21 |
JP4097139B2 JP4097139B2 (en) | 2008-06-11 |
Family
ID=33399565
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2003084384A Expired - Fee Related JP4097139B2 (en) | 2003-03-26 | 2003-03-26 | Wireless tag |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP4097139B2 (en) |
Cited By (63)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2006064540A1 (en) * | 2004-12-14 | 2006-06-22 | Fujitsu Limited | Antenna and noncontact tag |
JP2007067884A (en) * | 2005-08-31 | 2007-03-15 | Yokowo Co Ltd | Antenna |
JP2008067342A (en) * | 2006-08-09 | 2008-03-21 | Fujitsu Ltd | Rfid tag, and manufacturing method therefor |
JP2008187601A (en) * | 2007-01-31 | 2008-08-14 | Fujitsu Ltd | Rfid tag |
JP2008236713A (en) * | 2007-03-20 | 2008-10-02 | Ind Technol Res Inst | Antenna for radio frequency identification tag |
KR100861764B1 (en) | 2006-05-30 | 2008-10-14 | (주) 큐알온텍 | Reader of rfid system having multi frequency and multi protocol |
US7503505B2 (en) | 2005-04-19 | 2009-03-17 | Aruze Corp. | Non-contact IC card system and attaching body for non-contact IC card |
WO2010001469A1 (en) * | 2008-07-02 | 2010-01-07 | 三菱電機株式会社 | Wireless communication device |
US7866565B2 (en) | 2007-03-26 | 2011-01-11 | Brother Kogyo Kabushiki Kaisha | Apparatus for producing RFID labels, cartridge for including at least a RFID tag, and RFID label manufacturing system |
WO2011045970A1 (en) * | 2009-10-16 | 2011-04-21 | 株式会社村田製作所 | Antenna and wireless ic device |
KR101106530B1 (en) * | 2009-06-19 | 2012-01-20 | 한국후지필름 주식회사 | Printed isotropic antenna |
US8336786B2 (en) | 2010-03-12 | 2012-12-25 | Murata Manufacturing Co., Ltd. | Wireless communication device and metal article |
US8400365B2 (en) | 2009-11-20 | 2013-03-19 | Murata Manufacturing Co., Ltd. | Antenna device and mobile communication terminal |
US8413907B2 (en) | 2007-07-17 | 2013-04-09 | Murata Manufacturing Co., Ltd. | Wireless IC device and electronic apparatus |
US8424762B2 (en) | 2007-04-14 | 2013-04-23 | Murata Manufacturing Co., Ltd. | Wireless IC device and component for wireless IC device |
US8424769B2 (en) | 2010-07-08 | 2013-04-23 | Murata Manufacturing Co., Ltd. | Antenna and RFID device |
US8493183B2 (en) | 2007-07-18 | 2013-07-23 | Fujitsu Limited | Wireless tag and method for producing wireless tag |
US8544759B2 (en) | 2009-01-09 | 2013-10-01 | Murata Manufacturing., Ltd. | Wireless IC device, wireless IC module and method of manufacturing wireless IC module |
US8552870B2 (en) | 2007-07-09 | 2013-10-08 | Murata Manufacturing Co., Ltd. | Wireless IC device |
US8590797B2 (en) | 2008-05-21 | 2013-11-26 | Murata Manufacturing Co., Ltd. | Wireless IC device |
US8602310B2 (en) | 2010-03-03 | 2013-12-10 | Murata Manufacturing Co., Ltd. | Radio communication device and radio communication terminal |
US8613395B2 (en) | 2011-02-28 | 2013-12-24 | Murata Manufacturing Co., Ltd. | Wireless communication device |
US8676117B2 (en) | 2006-01-19 | 2014-03-18 | Murata Manufacturing Co., Ltd. | Wireless IC device and component for wireless IC device |
US8680971B2 (en) | 2009-09-28 | 2014-03-25 | Murata Manufacturing Co., Ltd. | Wireless IC device and method of detecting environmental state using the device |
US8690070B2 (en) | 2009-04-14 | 2014-04-08 | Murata Manufacturing Co., Ltd. | Wireless IC device component and wireless IC device |
US8718727B2 (en) | 2009-12-24 | 2014-05-06 | Murata Manufacturing Co., Ltd. | Antenna having structure for multi-angled reception and mobile terminal including the antenna |
US8720789B2 (en) | 2012-01-30 | 2014-05-13 | Murata Manufacturing Co., Ltd. | Wireless IC device |
US8740093B2 (en) | 2011-04-13 | 2014-06-03 | Murata Manufacturing Co., Ltd. | Radio IC device and radio communication terminal |
US8770489B2 (en) | 2011-07-15 | 2014-07-08 | Murata Manufacturing Co., Ltd. | Radio communication device |
US8797148B2 (en) | 2008-03-03 | 2014-08-05 | Murata Manufacturing Co., Ltd. | Radio frequency IC device and radio communication system |
US8797225B2 (en) | 2011-03-08 | 2014-08-05 | Murata Manufacturing Co., Ltd. | Antenna device and communication terminal apparatus |
US8814056B2 (en) | 2011-07-19 | 2014-08-26 | Murata Manufacturing Co., Ltd. | Antenna device, RFID tag, and communication terminal apparatus |
US8853549B2 (en) | 2009-09-30 | 2014-10-07 | Murata Manufacturing Co., Ltd. | Circuit substrate and method of manufacturing same |
US8870077B2 (en) | 2008-08-19 | 2014-10-28 | Murata Manufacturing Co., Ltd. | Wireless IC device and method for manufacturing same |
US8878739B2 (en) | 2011-07-14 | 2014-11-04 | Murata Manufacturing Co., Ltd. | Wireless communication device |
US8905296B2 (en) | 2011-12-01 | 2014-12-09 | Murata Manufacturing Co., Ltd. | Wireless integrated circuit device and method of manufacturing the same |
US8917211B2 (en) | 2008-11-17 | 2014-12-23 | Murata Manufacturing Co., Ltd. | Antenna and wireless IC device |
US8937576B2 (en) | 2011-04-05 | 2015-01-20 | Murata Manufacturing Co., Ltd. | Wireless communication device |
US8944335B2 (en) | 2010-09-30 | 2015-02-03 | Murata Manufacturing Co., Ltd. | Wireless IC device |
US8976075B2 (en) | 2009-04-21 | 2015-03-10 | Murata Manufacturing Co., Ltd. | Antenna device and method of setting resonant frequency of antenna device |
US8981906B2 (en) | 2010-08-10 | 2015-03-17 | Murata Manufacturing Co., Ltd. | Printed wiring board and wireless communication system |
US8991713B2 (en) | 2011-01-14 | 2015-03-31 | Murata Manufacturing Co., Ltd. | RFID chip package and RFID tag |
US9024837B2 (en) | 2010-03-31 | 2015-05-05 | Murata Manufacturing Co., Ltd. | Antenna and wireless communication device |
US9024725B2 (en) | 2009-11-04 | 2015-05-05 | Murata Manufacturing Co., Ltd. | Communication terminal and information processing system |
US9104950B2 (en) | 2009-01-30 | 2015-08-11 | Murata Manufacturing Co., Ltd. | Antenna and wireless IC device |
US9117157B2 (en) | 2009-10-02 | 2015-08-25 | Murata Manufacturing Co., Ltd. | Wireless IC device and electromagnetic coupling module |
US9166291B2 (en) | 2010-10-12 | 2015-10-20 | Murata Manufacturing Co., Ltd. | Antenna device and communication terminal apparatus |
US9165239B2 (en) | 2006-04-26 | 2015-10-20 | Murata Manufacturing Co., Ltd. | Electromagnetic-coupling-module-attached article |
US9236651B2 (en) | 2010-10-21 | 2016-01-12 | Murata Manufacturing Co., Ltd. | Communication terminal device |
US9281873B2 (en) | 2008-05-26 | 2016-03-08 | Murata Manufacturing Co., Ltd. | Wireless IC device system and method of determining authenticity of wireless IC device |
US9378452B2 (en) | 2011-05-16 | 2016-06-28 | Murata Manufacturing Co., Ltd. | Radio IC device |
US9460376B2 (en) | 2007-07-18 | 2016-10-04 | Murata Manufacturing Co., Ltd. | Radio IC device |
US9460320B2 (en) | 2009-10-27 | 2016-10-04 | Murata Manufacturing Co., Ltd. | Transceiver and radio frequency identification tag reader |
US9461363B2 (en) | 2009-11-04 | 2016-10-04 | Murata Manufacturing Co., Ltd. | Communication terminal and information processing system |
US9543642B2 (en) | 2011-09-09 | 2017-01-10 | Murata Manufacturing Co., Ltd. | Antenna device and wireless device |
US9558384B2 (en) | 2010-07-28 | 2017-01-31 | Murata Manufacturing Co., Ltd. | Antenna apparatus and communication terminal instrument |
US9692128B2 (en) | 2012-02-24 | 2017-06-27 | Murata Manufacturing Co., Ltd. | Antenna device and wireless communication device |
US9727765B2 (en) | 2010-03-24 | 2017-08-08 | Murata Manufacturing Co., Ltd. | RFID system including a reader/writer and RFID tag |
US9761923B2 (en) | 2011-01-05 | 2017-09-12 | Murata Manufacturing Co., Ltd. | Wireless communication device |
US10013650B2 (en) | 2010-03-03 | 2018-07-03 | Murata Manufacturing Co., Ltd. | Wireless communication module and wireless communication device |
US10235544B2 (en) | 2012-04-13 | 2019-03-19 | Murata Manufacturing Co., Ltd. | Inspection method and inspection device for RFID tag |
JP2020027646A (en) * | 2018-08-09 | 2020-02-20 | Nes株式会社 | IC tag and composite IC card |
WO2022269541A1 (en) * | 2021-06-24 | 2022-12-29 | Avery Dennison Retail Information Services Llc | Microwave tolerant rfid system and components |
-
2003
- 2003-03-26 JP JP2003084384A patent/JP4097139B2/en not_active Expired - Fee Related
Cited By (82)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2006064540A1 (en) * | 2004-12-14 | 2006-06-22 | Fujitsu Limited | Antenna and noncontact tag |
US7570225B2 (en) | 2004-12-14 | 2009-08-04 | Fujitsu Limited | Antenna and non-contact tag |
US7503505B2 (en) | 2005-04-19 | 2009-03-17 | Aruze Corp. | Non-contact IC card system and attaching body for non-contact IC card |
JP2007067884A (en) * | 2005-08-31 | 2007-03-15 | Yokowo Co Ltd | Antenna |
US8725071B2 (en) | 2006-01-19 | 2014-05-13 | Murata Manufacturing Co., Ltd. | Wireless IC device and component for wireless IC device |
US8676117B2 (en) | 2006-01-19 | 2014-03-18 | Murata Manufacturing Co., Ltd. | Wireless IC device and component for wireless IC device |
US9165239B2 (en) | 2006-04-26 | 2015-10-20 | Murata Manufacturing Co., Ltd. | Electromagnetic-coupling-module-attached article |
KR100861764B1 (en) | 2006-05-30 | 2008-10-14 | (주) 큐알온텍 | Reader of rfid system having multi frequency and multi protocol |
US8022878B2 (en) | 2006-08-09 | 2011-09-20 | Fujitsu Limited | RFID tag and manufacturing method thereof |
JP2008067342A (en) * | 2006-08-09 | 2008-03-21 | Fujitsu Ltd | Rfid tag, and manufacturing method therefor |
US8462052B2 (en) | 2006-08-09 | 2013-06-11 | Fujitsu Limited | RFID tag and manufacturing method thereof |
US8068057B2 (en) | 2007-01-31 | 2011-11-29 | Fujitsu Limited | RFID tag |
JP2008187601A (en) * | 2007-01-31 | 2008-08-14 | Fujitsu Ltd | Rfid tag |
JP2008236713A (en) * | 2007-03-20 | 2008-10-02 | Ind Technol Res Inst | Antenna for radio frequency identification tag |
US7866565B2 (en) | 2007-03-26 | 2011-01-11 | Brother Kogyo Kabushiki Kaisha | Apparatus for producing RFID labels, cartridge for including at least a RFID tag, and RFID label manufacturing system |
US8424762B2 (en) | 2007-04-14 | 2013-04-23 | Murata Manufacturing Co., Ltd. | Wireless IC device and component for wireless IC device |
US8662403B2 (en) | 2007-07-04 | 2014-03-04 | Murata Manufacturing Co., Ltd. | Wireless IC device and component for wireless IC device |
US8552870B2 (en) | 2007-07-09 | 2013-10-08 | Murata Manufacturing Co., Ltd. | Wireless IC device |
US8413907B2 (en) | 2007-07-17 | 2013-04-09 | Murata Manufacturing Co., Ltd. | Wireless IC device and electronic apparatus |
US9830552B2 (en) | 2007-07-18 | 2017-11-28 | Murata Manufacturing Co., Ltd. | Radio IC device |
US8493183B2 (en) | 2007-07-18 | 2013-07-23 | Fujitsu Limited | Wireless tag and method for producing wireless tag |
US9460376B2 (en) | 2007-07-18 | 2016-10-04 | Murata Manufacturing Co., Ltd. | Radio IC device |
US8797148B2 (en) | 2008-03-03 | 2014-08-05 | Murata Manufacturing Co., Ltd. | Radio frequency IC device and radio communication system |
US9022295B2 (en) | 2008-05-21 | 2015-05-05 | Murata Manufacturing Co., Ltd. | Wireless IC device |
US8590797B2 (en) | 2008-05-21 | 2013-11-26 | Murata Manufacturing Co., Ltd. | Wireless IC device |
US8973841B2 (en) | 2008-05-21 | 2015-03-10 | Murata Manufacturing Co., Ltd. | Wireless IC device |
US9281873B2 (en) | 2008-05-26 | 2016-03-08 | Murata Manufacturing Co., Ltd. | Wireless IC device system and method of determining authenticity of wireless IC device |
WO2010001469A1 (en) * | 2008-07-02 | 2010-01-07 | 三菱電機株式会社 | Wireless communication device |
US8870077B2 (en) | 2008-08-19 | 2014-10-28 | Murata Manufacturing Co., Ltd. | Wireless IC device and method for manufacturing same |
US8917211B2 (en) | 2008-11-17 | 2014-12-23 | Murata Manufacturing Co., Ltd. | Antenna and wireless IC device |
US8544759B2 (en) | 2009-01-09 | 2013-10-01 | Murata Manufacturing., Ltd. | Wireless IC device, wireless IC module and method of manufacturing wireless IC module |
US9104950B2 (en) | 2009-01-30 | 2015-08-11 | Murata Manufacturing Co., Ltd. | Antenna and wireless IC device |
US8690070B2 (en) | 2009-04-14 | 2014-04-08 | Murata Manufacturing Co., Ltd. | Wireless IC device component and wireless IC device |
US8876010B2 (en) | 2009-04-14 | 2014-11-04 | Murata Manufacturing Co., Ltd | Wireless IC device component and wireless IC device |
US9564678B2 (en) | 2009-04-21 | 2017-02-07 | Murata Manufacturing Co., Ltd. | Antenna device and method of setting resonant frequency of antenna device |
US8976075B2 (en) | 2009-04-21 | 2015-03-10 | Murata Manufacturing Co., Ltd. | Antenna device and method of setting resonant frequency of antenna device |
US9203157B2 (en) | 2009-04-21 | 2015-12-01 | Murata Manufacturing Co., Ltd. | Antenna device and method of setting resonant frequency of antenna device |
KR101106530B1 (en) * | 2009-06-19 | 2012-01-20 | 한국후지필름 주식회사 | Printed isotropic antenna |
US8680971B2 (en) | 2009-09-28 | 2014-03-25 | Murata Manufacturing Co., Ltd. | Wireless IC device and method of detecting environmental state using the device |
US8853549B2 (en) | 2009-09-30 | 2014-10-07 | Murata Manufacturing Co., Ltd. | Circuit substrate and method of manufacturing same |
US9117157B2 (en) | 2009-10-02 | 2015-08-25 | Murata Manufacturing Co., Ltd. | Wireless IC device and electromagnetic coupling module |
US9444143B2 (en) | 2009-10-16 | 2016-09-13 | Murata Manufacturing Co., Ltd. | Antenna and wireless IC device |
WO2011045970A1 (en) * | 2009-10-16 | 2011-04-21 | 株式会社村田製作所 | Antenna and wireless ic device |
CN102576939A (en) * | 2009-10-16 | 2012-07-11 | 株式会社村田制作所 | Antenna and wireless ic device |
US9460320B2 (en) | 2009-10-27 | 2016-10-04 | Murata Manufacturing Co., Ltd. | Transceiver and radio frequency identification tag reader |
US9024725B2 (en) | 2009-11-04 | 2015-05-05 | Murata Manufacturing Co., Ltd. | Communication terminal and information processing system |
US9461363B2 (en) | 2009-11-04 | 2016-10-04 | Murata Manufacturing Co., Ltd. | Communication terminal and information processing system |
US8400365B2 (en) | 2009-11-20 | 2013-03-19 | Murata Manufacturing Co., Ltd. | Antenna device and mobile communication terminal |
US8704716B2 (en) | 2009-11-20 | 2014-04-22 | Murata Manufacturing Co., Ltd. | Antenna device and mobile communication terminal |
US8718727B2 (en) | 2009-12-24 | 2014-05-06 | Murata Manufacturing Co., Ltd. | Antenna having structure for multi-angled reception and mobile terminal including the antenna |
US10013650B2 (en) | 2010-03-03 | 2018-07-03 | Murata Manufacturing Co., Ltd. | Wireless communication module and wireless communication device |
US8602310B2 (en) | 2010-03-03 | 2013-12-10 | Murata Manufacturing Co., Ltd. | Radio communication device and radio communication terminal |
US8336786B2 (en) | 2010-03-12 | 2012-12-25 | Murata Manufacturing Co., Ltd. | Wireless communication device and metal article |
US8528829B2 (en) | 2010-03-12 | 2013-09-10 | Murata Manufacturing Co., Ltd. | Wireless communication device and metal article |
US9727765B2 (en) | 2010-03-24 | 2017-08-08 | Murata Manufacturing Co., Ltd. | RFID system including a reader/writer and RFID tag |
US9024837B2 (en) | 2010-03-31 | 2015-05-05 | Murata Manufacturing Co., Ltd. | Antenna and wireless communication device |
US8424769B2 (en) | 2010-07-08 | 2013-04-23 | Murata Manufacturing Co., Ltd. | Antenna and RFID device |
US9558384B2 (en) | 2010-07-28 | 2017-01-31 | Murata Manufacturing Co., Ltd. | Antenna apparatus and communication terminal instrument |
US8981906B2 (en) | 2010-08-10 | 2015-03-17 | Murata Manufacturing Co., Ltd. | Printed wiring board and wireless communication system |
US8944335B2 (en) | 2010-09-30 | 2015-02-03 | Murata Manufacturing Co., Ltd. | Wireless IC device |
US9166291B2 (en) | 2010-10-12 | 2015-10-20 | Murata Manufacturing Co., Ltd. | Antenna device and communication terminal apparatus |
US9236651B2 (en) | 2010-10-21 | 2016-01-12 | Murata Manufacturing Co., Ltd. | Communication terminal device |
US9761923B2 (en) | 2011-01-05 | 2017-09-12 | Murata Manufacturing Co., Ltd. | Wireless communication device |
US8991713B2 (en) | 2011-01-14 | 2015-03-31 | Murata Manufacturing Co., Ltd. | RFID chip package and RFID tag |
US8960561B2 (en) | 2011-02-28 | 2015-02-24 | Murata Manufacturing Co., Ltd. | Wireless communication device |
US8613395B2 (en) | 2011-02-28 | 2013-12-24 | Murata Manufacturing Co., Ltd. | Wireless communication device |
US8757502B2 (en) | 2011-02-28 | 2014-06-24 | Murata Manufacturing Co., Ltd. | Wireless communication device |
US8797225B2 (en) | 2011-03-08 | 2014-08-05 | Murata Manufacturing Co., Ltd. | Antenna device and communication terminal apparatus |
US8937576B2 (en) | 2011-04-05 | 2015-01-20 | Murata Manufacturing Co., Ltd. | Wireless communication device |
US8740093B2 (en) | 2011-04-13 | 2014-06-03 | Murata Manufacturing Co., Ltd. | Radio IC device and radio communication terminal |
US9378452B2 (en) | 2011-05-16 | 2016-06-28 | Murata Manufacturing Co., Ltd. | Radio IC device |
US8878739B2 (en) | 2011-07-14 | 2014-11-04 | Murata Manufacturing Co., Ltd. | Wireless communication device |
US8770489B2 (en) | 2011-07-15 | 2014-07-08 | Murata Manufacturing Co., Ltd. | Radio communication device |
US8814056B2 (en) | 2011-07-19 | 2014-08-26 | Murata Manufacturing Co., Ltd. | Antenna device, RFID tag, and communication terminal apparatus |
US9543642B2 (en) | 2011-09-09 | 2017-01-10 | Murata Manufacturing Co., Ltd. | Antenna device and wireless device |
US8905296B2 (en) | 2011-12-01 | 2014-12-09 | Murata Manufacturing Co., Ltd. | Wireless integrated circuit device and method of manufacturing the same |
US8720789B2 (en) | 2012-01-30 | 2014-05-13 | Murata Manufacturing Co., Ltd. | Wireless IC device |
US9692128B2 (en) | 2012-02-24 | 2017-06-27 | Murata Manufacturing Co., Ltd. | Antenna device and wireless communication device |
US10235544B2 (en) | 2012-04-13 | 2019-03-19 | Murata Manufacturing Co., Ltd. | Inspection method and inspection device for RFID tag |
JP2020027646A (en) * | 2018-08-09 | 2020-02-20 | Nes株式会社 | IC tag and composite IC card |
JP7356659B2 (en) | 2018-08-09 | 2023-10-05 | Nes株式会社 | IC tags and composite IC cards |
WO2022269541A1 (en) * | 2021-06-24 | 2022-12-29 | Avery Dennison Retail Information Services Llc | Microwave tolerant rfid system and components |
Also Published As
Publication number | Publication date |
---|---|
JP4097139B2 (en) | 2008-06-11 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JP4097139B2 (en) | Wireless tag | |
US7202825B2 (en) | Wireless communication device with integrated battery/antenna system | |
US8013795B2 (en) | Communication system and communication apparatus | |
US8023890B2 (en) | Communication system, communication apparatus, and electric-field-coupling antenna | |
JP4923975B2 (en) | Communication system and communication apparatus | |
JP5003625B2 (en) | High frequency coupler | |
JPWO2004109857A1 (en) | Antenna and electronic equipment using it | |
JP2007208536A (en) | Folded dipole antenna and tag using the same | |
JP3870958B2 (en) | ANTENNA DEVICE AND RADIO COMMUNICATION DEVICE | |
US20110128193A1 (en) | Card device for wireless communication | |
JP2007208993A (en) | Mobile communication terminal equipment equipped with rfid system | |
JP2004363848A (en) | Antenna-mounted substrate and pc card equipped with same | |
JP2003347828A (en) | Antenna device and radio card module | |
US8487825B2 (en) | Communication device and system including the same | |
CN109473768B (en) | Wireless device antenna | |
CN108574136B (en) | Wireless device antenna | |
JP2004304705A (en) | Wireless device | |
JP2006252253A (en) | Rfid system | |
JP2005236468A (en) | Wireless tag | |
JP2007221735A (en) | S-shaped plate-like small-sized dipole antenna for electronic tag, and electronic tag provided with the same | |
KR20160119501A (en) | Multi-band antenna | |
KR20150066279A (en) | Planar spiral antenna with improved in performance and wireless communication terminal including the same | |
US20020180647A1 (en) | Low profile, planar, slot antenna | |
JP2007194707A (en) | Planar antenna system | |
KR101093802B1 (en) | Antana for both sides beam diversity |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
A621 | Written request for application examination |
Free format text: JAPANESE INTERMEDIATE CODE: A621 Effective date: 20050912 |
|
A977 | Report on retrieval |
Free format text: JAPANESE INTERMEDIATE CODE: A971007 Effective date: 20070709 |
|
A131 | Notification of reasons for refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A131 Effective date: 20070801 |
|
A521 | Request for written amendment filed |
Free format text: JAPANESE INTERMEDIATE CODE: A523 Effective date: 20070925 |
|
TRDD | Decision of grant or rejection written | ||
A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 20080305 |
|
A61 | First payment of annual fees (during grant procedure) |
Free format text: JAPANESE INTERMEDIATE CODE: A61 Effective date: 20080306 |
|
R150 | Certificate of patent or registration of utility model |
Free format text: JAPANESE INTERMEDIATE CODE: R150 |
|
FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20110321 Year of fee payment: 3 |
|
FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20110321 Year of fee payment: 3 |
|
FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20120321 Year of fee payment: 4 |
|
FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20130321 Year of fee payment: 5 |
|
FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20140321 Year of fee payment: 6 |
|
S111 | Request for change of ownership or part of ownership |
Free format text: JAPANESE INTERMEDIATE CODE: R313113 |
|
R350 | Written notification of registration of transfer |
Free format text: JAPANESE INTERMEDIATE CODE: R350 |
|
R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
LAPS | Cancellation because of no payment of annual fees |