JP2005136528A - ループコイルアンテナ - Google Patents
ループコイルアンテナ Download PDFInfo
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- JP2005136528A JP2005136528A JP2003368192A JP2003368192A JP2005136528A JP 2005136528 A JP2005136528 A JP 2005136528A JP 2003368192 A JP2003368192 A JP 2003368192A JP 2003368192 A JP2003368192 A JP 2003368192A JP 2005136528 A JP2005136528 A JP 2005136528A
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- 239000004020 conductor Substances 0.000 claims abstract description 24
- 230000005291 magnetic effect Effects 0.000 claims abstract description 9
- 230000005540 biological transmission Effects 0.000 claims description 12
- 238000006243 chemical reaction Methods 0.000 claims description 8
- 230000005672 electromagnetic field Effects 0.000 claims description 7
- 230000006698 induction Effects 0.000 claims description 7
- 239000003990 capacitor Substances 0.000 claims description 5
- 238000001514 detection method Methods 0.000 claims description 5
- 239000002184 metal Substances 0.000 abstract description 26
- 238000013459 approach Methods 0.000 abstract description 7
- 230000007547 defect Effects 0.000 abstract 2
- 239000000758 substrate Substances 0.000 description 12
- 230000008878 coupling Effects 0.000 description 11
- 238000010168 coupling process Methods 0.000 description 11
- 238000005859 coupling reaction Methods 0.000 description 11
- 238000000926 separation method Methods 0.000 description 7
- 238000010586 diagram Methods 0.000 description 6
- 239000011347 resin Substances 0.000 description 5
- 229920005989 resin Polymers 0.000 description 5
- 239000000463 material Substances 0.000 description 4
- 102100029376 Cryptochrome-1 Human genes 0.000 description 3
- 102100026280 Cryptochrome-2 Human genes 0.000 description 3
- 101000919351 Homo sapiens Cryptochrome-1 Proteins 0.000 description 3
- 101000855613 Homo sapiens Cryptochrome-2 Proteins 0.000 description 3
- 102100029469 WD repeat and HMG-box DNA-binding protein 1 Human genes 0.000 description 2
- 101710097421 WD repeat and HMG-box DNA-binding protein 1 Proteins 0.000 description 2
- 239000011888 foil Substances 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 239000003302 ferromagnetic material Substances 0.000 description 1
- 238000009499 grossing Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 239000006247 magnetic powder Substances 0.000 description 1
- 230000005389 magnetism Effects 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
Images
Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/12—Supports; Mounting means
- H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
- H01Q1/2208—Supports; Mounting means by structural association with other equipment or articles associated with components used in interrogation type services, i.e. in systems for information exchange between an interrogator/reader and a tag/transponder, e.g. in Radio Frequency Identification [RFID] systems
- H01Q1/2216—Supports; Mounting means by structural association with other equipment or articles associated with components used in interrogation type services, i.e. in systems for information exchange between an interrogator/reader and a tag/transponder, e.g. in Radio Frequency Identification [RFID] systems used in interrogator/reader equipment
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K7/00—Methods or arrangements for sensing record carriers, e.g. for reading patterns
- G06K7/10—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation
- G06K7/10009—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation sensing by radiation using wavelengths larger than 0.1 mm, e.g. radio-waves or microwaves
- G06K7/10316—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation sensing by radiation using wavelengths larger than 0.1 mm, e.g. radio-waves or microwaves using at least one antenna particularly designed for interrogating the wireless record carriers
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K7/00—Methods or arrangements for sensing record carriers, e.g. for reading patterns
- G06K7/10—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation
- G06K7/10009—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation sensing by radiation using wavelengths larger than 0.1 mm, e.g. radio-waves or microwaves
- G06K7/10316—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation sensing by radiation using wavelengths larger than 0.1 mm, e.g. radio-waves or microwaves using at least one antenna particularly designed for interrogating the wireless record carriers
- G06K7/10336—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation sensing by radiation using wavelengths larger than 0.1 mm, e.g. radio-waves or microwaves using at least one antenna particularly designed for interrogating the wireless record carriers the antenna being of the near field type, inductive coil
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q7/00—Loop antennas with a substantially uniform current distribution around the loop and having a directional radiation pattern in a plane perpendicular to the plane of the loop
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Toxicology (AREA)
- General Health & Medical Sciences (AREA)
- Electromagnetism (AREA)
- Computer Networks & Wireless Communication (AREA)
- Artificial Intelligence (AREA)
- Computer Vision & Pattern Recognition (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Near-Field Transmission Systems (AREA)
- Support Of Aerials (AREA)
Abstract
この発明は、リーダライタに金属やタグなどの導体が近づいてきた場合の悪影響を回避することができるアンテナ整合回路を構築して、リーダライタ側での交信不良領域の解消および交信距離を安定して維持する。
【解決手段】
この発明は、リーダライタのアンテナコイルに発生させた磁界発生領域にタグが対応したとき、その対応したタグのアンテナコイルに発生する電力で該タグの制御回路を動かして前記リーダライタに情報を送るための電波を出力するRFIDシステムであって、前記リーダライタのアンテナコイルの付近に導体を配置して、意図的に渦電流を流すことにより、このリーダライタに接近するタグとの間での交信不良を低減する。
【選択図】 図1
Description
例えば、受信回路を構成する場合、図10に示すように、1次帯域フィルタ101、1次検波器102、2次帯域フィルタ103、2次検波器104、低域フィルタ105を、この順に並べ、副搬送波の周波数に変調して伝送するとき、この順に情報を通過させることにより情報を復調している。しかしながら、副搬送波の周波数を増幅して情報を復調するために多くの構成を要して回路が複雑になり、コスト高になっていた。
図面はRFIDシステムに用いられる分離型のリーダライタを示し、図1において、この分離型のリーダライタ11は非導電性の樹脂材質を用いた一方のリーダライタ基板12と、同じく非導電性の樹脂材質を用いた他方のアンテナ基板13とを分離して設けたものである。
このように構成された分離型のリーダライタ11の使用状態を次に説明する。この分離型のリーダライタ11のアンテナ基板13側にICタグ19が近づいてきた場合、このアンテナ基板13側のアンテナコイル15から出力されたある方向に向けての空間に形成された交信領域にICタグ19が入ると、これに基づいてICタグ19は該タグ19のアンテナコイルに発生する電力で該タグ19の制御回路を駆動してリーダライタ11側に情報を送るための電波を出力して、このICタグ19とリーダライタ11との間で情報のやり取りを行う。
15…アンテナコイル
16…アンテナ整合回路
17…金属板
Claims (5)
- リーダライタのアンテナコイルに発生させた磁界発生領域にタグが対応したとき、その対応したタグのアンテナコイルに発生する電力で該タグの制御回路を動かして前記リーダライタに情報を送るための電波を出力するRFIDシステムであって、
前記リーダライタのアンテナコイルの付近に導体を配置したループコイルアンテナ。 - 前記導体をループ状のアンテナコイルで囲まれる内部に配置した請求項1記載のループコイルアンテナ。
- リーダライタのアンテナコイルに発生させた磁界発生領域にタグが対応したとき、その対応したタグのアンテナコイルに発生する電力で該タグの制御回路を動かして前記リーダライタに情報を送るための電波を出力するRFIDシステムであって、
前記リーダライタのアンテナコイルとグランド間に平衡不平衡変換用のコンデンサを介在させて構成したアンテナ整合回路を備えたループコイルアンテナ。 - リーダライタとタグとの間で誘導電磁界を用いて非接触に情報を送受信して情報のやり取りを行うRFIDシステムであって、
制御信号が入力されたとき、該制御信号の矩形波を読出し、この読出した矩形波を抵抗分圧した後、帯域フィルタに通過させて振幅変調信号を生成する送信回路を備えたリーダライタ。 - リーダライタとタグとの間で誘導電磁界を用いて非接触に情報を送受信して情報のやり取りを行うRFIDシステムであって、
情報を副搬送波の周波数に変調して伝送するとき、該情報を1次検波と低域フィルタとに通過させて変調する受信回路を備えたリーダライタ。
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2003368192A JP3570430B1 (ja) | 2003-10-29 | 2003-10-29 | ループコイルアンテナ |
JP2004137176A JP4131250B2 (ja) | 2003-10-29 | 2004-05-06 | リーダライタ |
EP04256650A EP1528621A1 (en) | 2003-10-29 | 2004-10-28 | Loop coil antenna |
CNA2004100901466A CN1619572A (zh) | 2003-10-29 | 2004-10-29 | 环形线圈天线和读写器 |
US10/975,395 US20050092836A1 (en) | 2003-10-29 | 2004-10-29 | Loop coilantenna |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2003368192A JP3570430B1 (ja) | 2003-10-29 | 2003-10-29 | ループコイルアンテナ |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2004137176A Division JP4131250B2 (ja) | 2003-10-29 | 2004-05-06 | リーダライタ |
Publications (2)
Publication Number | Publication Date |
---|---|
JP3570430B1 JP3570430B1 (ja) | 2004-09-29 |
JP2005136528A true JP2005136528A (ja) | 2005-05-26 |
Family
ID=33128366
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2003368192A Expired - Lifetime JP3570430B1 (ja) | 2003-10-29 | 2003-10-29 | ループコイルアンテナ |
JP2004137176A Expired - Fee Related JP4131250B2 (ja) | 2003-10-29 | 2004-05-06 | リーダライタ |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2004137176A Expired - Fee Related JP4131250B2 (ja) | 2003-10-29 | 2004-05-06 | リーダライタ |
Country Status (4)
Country | Link |
---|---|
US (1) | US20050092836A1 (ja) |
EP (1) | EP1528621A1 (ja) |
JP (2) | JP3570430B1 (ja) |
CN (1) | CN1619572A (ja) |
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KR100752697B1 (ko) | 2006-02-25 | 2007-08-31 | 주식회사 하이트랙스 | 파워 디바이더를 내장한 rfid 리더기용 선반형 안테나및 이를 이용한 자료 관리 시스템 |
WO2007125752A1 (ja) | 2006-04-26 | 2007-11-08 | Murata Manufacturing Co., Ltd. | 給電回路基板付き物品 |
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US7762472B2 (en) | 2007-07-04 | 2010-07-27 | Murata Manufacturing Co., Ltd | Wireless IC device |
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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 |
JP2015106284A (ja) * | 2013-11-29 | 2015-06-08 | ぺんてる株式会社 | 静電容量結合方式スイッチのパターン |
JP2019073956A (ja) * | 2017-10-19 | 2019-05-16 | 日本発條株式会社 | 錠前用シリンダユニット |
JP7013197B2 (ja) | 2017-10-19 | 2022-01-31 | 日本発條株式会社 | 錠前用シリンダユニット |
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EP1528621A1 (en) | 2005-05-04 |
JP2005136944A (ja) | 2005-05-26 |
CN1619572A (zh) | 2005-05-25 |
JP3570430B1 (ja) | 2004-09-29 |
JP4131250B2 (ja) | 2008-08-13 |
US20050092836A1 (en) | 2005-05-05 |
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