JP3783713B2 - リーダ・ライタ用アンテナ - Google Patents
リーダ・ライタ用アンテナ Download PDFInfo
- Publication number
- JP3783713B2 JP3783713B2 JP2003417090A JP2003417090A JP3783713B2 JP 3783713 B2 JP3783713 B2 JP 3783713B2 JP 2003417090 A JP2003417090 A JP 2003417090A JP 2003417090 A JP2003417090 A JP 2003417090A JP 3783713 B2 JP3783713 B2 JP 3783713B2
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- JP
- Japan
- Prior art keywords
- antenna
- loop
- reader
- receiving
- receiving antenna
- 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.)
- Expired - Lifetime
Links
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- 238000010168 coupling process Methods 0.000 claims abstract description 16
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- 230000005674 electromagnetic induction Effects 0.000 description 4
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- 229910052802 copper Inorganic materials 0.000 description 1
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Images
Classifications
-
- 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
-
- 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
- H01Q7/04—Screened antennas
-
- H04B5/26—
Description
図1に示した態様の本発明のリーダ・ライタ用アンテナ1aを作製した。この場合、送信用アンテナ2を構成する内側ループコイル2a及び外側ループコイル2bのコイル定数は表1のように設定した(実施例1)。
2 送信用アンテナ
2a、2b 送信用アンテナのループコイル
3 受信用アンテナ
3p、3q、3r、3s 受信用アンテナの補助コイル
4 基板
5 バイファイラーチョーク
6 マッチングトランス
7 シールド線
7a シールド外被
7b 内部導体
8 パイプ材
10x 送信アンテナ板
10y 受信アンテナ板
11x アース板
11y アース板
12 絶縁板
13 シールド管
Claims (4)
- 質問器と応答器からなる非接触式データキャリアの質問器のリーダ・ライタ用アンテナにおいて、質問器のリーダ・ライタ用アンテナが応答器に信号を送信する送信用アンテナと応答器からの信号を受信する受信用アンテナとからなり、
送信用アンテナが、一条のアンテナ導体から成形された、互いに隣接する少なくとも2つのループコイルからなり、隣接したループコイル同士は巻方向が互いに逆向きで、互いに逆極性の磁界を発生し、
受信用アンテナが、送信用アンテナから発せられた互いに逆極性の磁界により、該受信用アンテナに互いに逆極性の磁界が誘起され、かつそれら逆極性の磁界が互いに打ち消し合う位置に配されているループコイルからなり、
受信用アンテナに、該受信用アンテナと送信用アンテナとの静電結合による漏洩電流を防止するバイファイラーチョークが設けられていること
を特徴とするリーダ・ライタ用アンテナ。 - 送信用アンテナから送出された磁界の磁界強度が、通信エリアに比して通信エリア外で大きく減少するように、送信用アンテナの各ループコイルのループ径、巻数、巻方向、電流の絶対値及び電流の位相差の少なくとも一つの要素が調整されている請求項1記載のリーダ・ライタ用アンテナ。
- 受信用アンテナに、該受信用アンテナと送信用アンテナとの相互誘導インダクタンスを調整する補助コイルが設けられている請求項1又は2記載のリーダ・ライタ用アンテナ。
- 受信用アンテナに、該受信用アンテナと送信用アンテナとの静電結合を防止する静電シールドが設けられている請求項1〜3のいずれかに記載のリーダ・ライタ用アンテナ。
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2003417090A JP3783713B2 (ja) | 1995-09-30 | 2003-12-15 | リーダ・ライタ用アンテナ |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP27697895A JP3528367B2 (ja) | 1995-09-30 | 1995-09-30 | リーダ・ライタ用アンテナ |
JP2003417090A JP3783713B2 (ja) | 1995-09-30 | 2003-12-15 | リーダ・ライタ用アンテナ |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP27697895A Division JP3528367B2 (ja) | 1995-09-30 | 1995-09-30 | リーダ・ライタ用アンテナ |
Publications (2)
Publication Number | Publication Date |
---|---|
JP2004173293A JP2004173293A (ja) | 2004-06-17 |
JP3783713B2 true JP3783713B2 (ja) | 2006-06-07 |
Family
ID=17577068
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP27697895A Expired - Lifetime JP3528367B2 (ja) | 1995-09-30 | 1995-09-30 | リーダ・ライタ用アンテナ |
JP2003417090A Expired - Lifetime JP3783713B2 (ja) | 1995-09-30 | 2003-12-15 | リーダ・ライタ用アンテナ |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP27697895A Expired - Lifetime JP3528367B2 (ja) | 1995-09-30 | 1995-09-30 | リーダ・ライタ用アンテナ |
Country Status (6)
Country | Link |
---|---|
US (1) | US6137447A (ja) |
EP (1) | EP0766200B1 (ja) |
JP (2) | JP3528367B2 (ja) |
KR (1) | KR100445249B1 (ja) |
DE (1) | DE69635792T2 (ja) |
SG (1) | SG52846A1 (ja) |
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DE3801205C1 (en) * | 1988-01-18 | 1989-03-23 | Fraunhofer-Gesellschaft Zur Foerderung Der Angewandten Forschung Ev, 8000 Muenchen, De | Device for ion etching of substrates with the support of a magnetic field |
US5218371A (en) * | 1990-08-14 | 1993-06-08 | Sensormatic Electronics Corporation | Antenna array for enhanced field falloff |
US5321412A (en) * | 1991-05-13 | 1994-06-14 | Sensormatic Electronics Corporation | Antenna arrangement with reduced coupling between transmit antenna and receive antenna |
DE4319878A1 (de) * | 1992-06-17 | 1993-12-23 | Micron Technology Inc | Hochfrequenz-Identifikationseinrichtung (HFID) und Verfahren zu ihrer Herstellung |
JPH0844833A (ja) * | 1994-08-03 | 1996-02-16 | Mitsubishi Denki Semiconductor Software Kk | 非接触icカード用リーダライタ及び非接触icカード用リーダライタシステム |
US5602556A (en) * | 1995-06-07 | 1997-02-11 | Check Point Systems, Inc. | Transmit and receive loop antenna |
-
1995
- 1995-09-30 JP JP27697895A patent/JP3528367B2/ja not_active Expired - Lifetime
-
1996
- 1996-09-27 US US08/721,949 patent/US6137447A/en not_active Expired - Lifetime
- 1996-09-27 DE DE69635792T patent/DE69635792T2/de not_active Expired - Lifetime
- 1996-09-27 EP EP96115546A patent/EP0766200B1/en not_active Expired - Lifetime
- 1996-09-28 SG SG1996010763A patent/SG52846A1/en unknown
- 1996-09-30 KR KR1019960042842A patent/KR100445249B1/ko active IP Right Grant
-
2003
- 2003-12-15 JP JP2003417090A patent/JP3783713B2/ja not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
DE69635792D1 (de) | 2006-04-20 |
SG52846A1 (en) | 1998-09-28 |
KR100445249B1 (ko) | 2004-11-03 |
US6137447A (en) | 2000-10-24 |
EP0766200A3 (en) | 2000-11-15 |
EP0766200B1 (en) | 2006-02-08 |
JP3528367B2 (ja) | 2004-05-17 |
DE69635792T2 (de) | 2006-10-19 |
JP2004173293A (ja) | 2004-06-17 |
JPH0998014A (ja) | 1997-04-08 |
KR970018842A (ko) | 1997-04-30 |
EP0766200A2 (en) | 1997-04-02 |
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