JP4815148B2 - 異なる搬送周波数で動作するトランスポンダに適合するrfidリーダのアンテナアレイ - Google Patents
異なる搬送周波数で動作するトランスポンダに適合するrfidリーダのアンテナアレイ Download PDFInfo
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- JP4815148B2 JP4815148B2 JP2005143698A JP2005143698A JP4815148B2 JP 4815148 B2 JP4815148 B2 JP 4815148B2 JP 2005143698 A JP2005143698 A JP 2005143698A JP 2005143698 A JP2005143698 A JP 2005143698A JP 4815148 B2 JP4815148 B2 JP 4815148B2
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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
- G06K7/10118—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 the sensing being preceded by at least one preliminary step
- G06K7/10128—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 the sensing being preceded by at least one preliminary step the step consisting of detection of the presence of one or more record carriers in the vicinity of the interrogation device
-
- 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
-
- 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
- G06K7/10356—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 using a plurality of antennas, e.g. configurations including means to resolve interference between the plurality of antennas
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- Artificial Intelligence (AREA)
- Computer Vision & Pattern Recognition (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Near-Field Transmission Systems (AREA)
- Variable-Direction Aerials And Aerial Arrays (AREA)
Description
アンテナ入力線42、44は、リーダアンテナ34、38及び組み合わせる同調用キャパシタ36、40それぞれと、シグナル生成部24とを直接接続するように示されている。しかしながら、リーダアンテナ34、38及び同調用キャパシタ36、40を組み合わせ、アンテナ入力線42、44を介してシグナル生成部24に連結するにあたっては、さらに間接的な結合を含む連結であってもよく、当業者の技術範囲において、一つ以上の電子構成要素を追加し、シグナル生成部24とリーダアンテナ34、38及び同調用キャパシタ36、40との間をつなぐアンテナ入力線42、44の経路中に配置してもよい。
リーダアンテナ群は、図1では、概略的にコイルとして表されており、それぞれ、一つのらせん状の巻線として表されたリーダアンテナ34あるいはリーダアンテナ38を含む。しかしながら、本発明では、リーダアンテナ34、38を、当業者に周知の実質的に実用のある構成要素によって構成することもできる。例えば、リーダアンテナ34、38は、例示した一つの巻線に代えて、複数の巻線にすることもできる。さらに、リーダアンテナ34、38は、例示したらせんに代えて、実質的に実用的な形状、例えば、矩形、円形、楕円形などの形状であってもよい。リーダアンテナ34、38は、図1では、相互に近接し平行して配置された概念で表されている。しかしながら、アンテナ34、38相互の配置は、以下に示すように本発明の記載に関連してより有利な特定の配置を採ることもできる。
第一のアンテナコイルが低周波数(125kHz)リーダアンテナであり、一方、第二の
アンテナコイルが高周波数(13.56MHz)リーダアンテナである場合を説明する。
リーダ低周波数アンテナは、典型的には1ミリヘンリのインダクタンスを有する。共振周
波数(ラジアンの)の二乗は、インダクタンスと電気容量の積に反比例するので、13.
56MHzの自己共振のためのリーダ低周波数アンテナの電気容量は、約0.14ピコフ
ァラド(picofarads)となり、これは、寄生容量あるいは浮遊容量の範囲内である。この
レベルの電気容量をコントロールすることは極めて難しく、また、13.56MHzあるいはこの近辺の周波数におけるリーダ低周波数アンテナの自己共振が、リーダ高周波数アンテナのオペレーションに干渉するのを防ぐことも同様に非常に難しい。
Claims (11)
- 第一の低搬送周波数でデータ信号を送信する第一のトランスポンダと一体でデータ通信を可能にする、前記第一の低搬送周波数で動作するように同調させた第一のリーダアンテナと、
第二の高搬送周波数でデータ信号を送信する第二のトランスポンダと一体でデータ通信を可能にする、前記第一の低搬送周波数と異なる前記第二の高搬送周波数で動作するように同調させた第二のリーダアンテナと、
を備え、
前記第一及び第二のリーダアンテナは、
前記第二のリーダアンテナによって生じる正と負の両方向の磁束が、前記第一のリーダアンテナを通り抜けるような磁束対向配置に配置され、
前記第一及び第二のリーダアンテナのそれぞれの全体領域よりも小さい領域で互いにオーバーラップするように配置される、
ことを特徴とするRFIDリーダのアンテナアレイ。 - 前記第一の低搬送周波数が、公称125kHzである請求項1記載のアンテナアレイ。
- 前記第二の高搬送周波数が、13.56MHzである請求項1記載のアンテナアレイ。
- 第一及び第二のアンテナを格納するリーダハウジングを更に備える請求項1記載のアンテナアレイ。
- 前記第一のリーダアンテナの前記全体領域と、前記第二のリーダアンテナの前記全体領域とが実質的に同じ大きさであり、前記第一及び第二のリーダアンテナは同方向の交信角度を有し、前記第一のリーダアンテナの前記全体領域の実質上の半分が前記第二のリーダアンテナの前記全体領域の実質上の半分と重なるように相互に関連して配置される請求項1記載のアンテナアレイ。
- 前記第一及び第二のリーダアンテナが、シグナル生成部と連結している請求項1記載のアンテナアレイ。
- 前記シグナル生成部は、前記第一及び第二のリーダアンテナからの送信シグナルを生成するための統合された手段を有する統合型のシグナル生成部である請求項6記載のアンテナアレイ。
- 前記シグナル生成部は、前記第一のリーダアンテナからの送信シグナルを生成し、前記第一のリーダアンテナと連結する個別第一シグナル生成部と、前記第二のリーダアンテナからの送信シグナルを生成し、前記第二のリーダアンテナと連結する前記個別第一のシグナル生成部から分離された個別第二シグナル生成部とを有する請求項6記載のアンテナアレイ。
- 前記第一及び第二のリーダアンテナが、受信電子回路と連結している請求項1記載のアンテナアレイ。
- 前記受信電子回路は、前記第一及び第二のリーダアンテナが受信したシグナルを処理するための統合された手段を有する統合型の受信電子回路である請求項9記載のアンテナアレイ。
- 前記受信電子回路は、前記第一のリーダアンテナが受信したシグナルを処理するための、前記第一のリーダアンテナと連結する個別第一受信電子回路と、前記第二のリーダアンテナが受信したシグナルを処理するための、前記第二のリーダアンテナと連結する前記個別第一受信電子回路から分離された個別第二受信電子回路とを有する請求項9記載のアンテナアレイ。
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/848,246 US7180403B2 (en) | 2004-05-18 | 2004-05-18 | RFID reader utilizing an analog to digital converter for data acquisition and power monitoring functions |
US10/848,246 | 2004-05-18 | ||
US11/016,576 US7439862B2 (en) | 2004-05-18 | 2004-12-16 | Antenna array for an RFID reader compatible with transponders operating at different carrier frequencies |
US11/016,576 | 2004-12-16 |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2009113070A Division JP5043062B2 (ja) | 2004-05-18 | 2009-05-07 | 異なる搬送周波数で動作するトランスポンダに適合するrfidリーダのアンテナアレイ |
Publications (3)
Publication Number | Publication Date |
---|---|
JP2006012129A JP2006012129A (ja) | 2006-01-12 |
JP2006012129A5 JP2006012129A5 (ja) | 2009-06-25 |
JP4815148B2 true JP4815148B2 (ja) | 2011-11-16 |
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ID=34941326
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Application Number | Title | Priority Date | Filing Date |
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JP2005143698A Active JP4815148B2 (ja) | 2004-05-18 | 2005-05-17 | 異なる搬送周波数で動作するトランスポンダに適合するrfidリーダのアンテナアレイ |
JP2009113070A Active JP5043062B2 (ja) | 2004-05-18 | 2009-05-07 | 異なる搬送周波数で動作するトランスポンダに適合するrfidリーダのアンテナアレイ |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
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JP2009113070A Active JP5043062B2 (ja) | 2004-05-18 | 2009-05-07 | 異なる搬送周波数で動作するトランスポンダに適合するrfidリーダのアンテナアレイ |
Country Status (7)
Country | Link |
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US (1) | US7439862B2 (ja) |
EP (1) | EP1605391B1 (ja) |
JP (2) | JP4815148B2 (ja) |
AU (1) | AU2005202015B9 (ja) |
CA (1) | CA2507277C (ja) |
DE (1) | DE602005013321D1 (ja) |
ES (1) | ES2324223T3 (ja) |
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