JP2005204038A - 識別タグのリーダライタ用アンテナ - Google Patents
識別タグのリーダライタ用アンテナ Download PDFInfo
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- JP2005204038A JP2005204038A JP2004007967A JP2004007967A JP2005204038A JP 2005204038 A JP2005204038 A JP 2005204038A JP 2004007967 A JP2004007967 A JP 2004007967A JP 2004007967 A JP2004007967 A JP 2004007967A JP 2005204038 A JP2005204038 A JP 2005204038A
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- Prior art keywords
- resonance circuit
- reader
- auxiliary electrode
- writer
- identification tag
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- 239000003990 capacitor Substances 0.000 claims abstract description 26
- 230000005284 excitation Effects 0.000 claims description 12
- 230000008878 coupling Effects 0.000 claims description 7
- 238000010168 coupling process Methods 0.000 claims description 7
- 238000005859 coupling reaction Methods 0.000 claims description 7
- 239000000758 substrate Substances 0.000 description 35
- 230000005540 biological transmission Effects 0.000 description 9
- 238000010586 diagram Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 239000000919 ceramic Substances 0.000 description 2
- 239000004020 conductor Substances 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 2
- 229920001721 polyimide Polymers 0.000 description 2
- 238000004891 communication Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005530 etching Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
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- Near-Field Transmission Systems (AREA)
Abstract
【解決手段】励磁コイル11と、励磁コイル11に電磁結合させる共振回路12と、可変コンデンサを接続する補助電極13とを組み合わせ、補助電極13は、共振回路12に容量結合させる。
【選択図】図1
Description
RW…リーダライタ
g…ギャップ
d…間隔
Cg 、Cd …コンデンサ
Cs …ストレイ容量
Cv …可変コンデンサ
11…励磁コイル
12…共振回路
13…補助電極
14…グラウンド層
特許出願人 株式会社 エフ・イー・シー
代理人 弁理士 松 田 忠 秋
Claims (6)
- リーダライタに接続する励磁コイルと、該励磁コイルに電磁結合させる共振回路と、可変コンデンサを接続する補助電極とを備えてなり、該補助電極は、前記共振回路に容量結合させることを特徴とする識別タグのリーダライタ用アンテナ。
- 前記励磁コイルは、一端開放の二次元のスパイラルパターンに形成し、ストレイ容量を共振用のコンデンサとすることを特徴とする請求項1記載の識別タグのリーダライタ用アンテナ。
- 前記共振回路は、ギャップを介して両端を対向させる1ターンのループパターンに形成し、前記ギャップを共振用のコンデンサとすることを特徴とする請求項1または請求項2記載の識別タグのリーダライタ用アンテナ。
- 前記補助電極は、前記共振回路に近接するランドパターンに形成し、前記共振回路との間隔を結合用のコンデンサとすることを特徴とする請求項1ないし請求項3のいずれか記載の識別タグのリーダライタ用アンテナ。
- 前記励磁コイルと、前記共振回路、補助電極とは、一体の多層プリント板として形成することを特徴とする請求項1ないし請求項4のいずれか記載の識別タグのリーダライタ用アンテナ。
- グラウンド層を片面に付加することを特徴とする請求項5記載の識別タグのリーダライタ用アンテナ。
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2004007967A JP4174801B2 (ja) | 2004-01-15 | 2004-01-15 | 識別タグのリーダライタ用アンテナ |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2004007967A JP4174801B2 (ja) | 2004-01-15 | 2004-01-15 | 識別タグのリーダライタ用アンテナ |
Publications (2)
Publication Number | Publication Date |
---|---|
JP2005204038A true JP2005204038A (ja) | 2005-07-28 |
JP4174801B2 JP4174801B2 (ja) | 2008-11-05 |
Family
ID=34821462
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2004007967A Expired - Fee Related JP4174801B2 (ja) | 2004-01-15 | 2004-01-15 | 識別タグのリーダライタ用アンテナ |
Country Status (1)
Country | Link |
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JP (1) | JP4174801B2 (ja) |
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-
2004
- 2004-01-15 JP JP2004007967A patent/JP4174801B2/ja not_active Expired - Fee Related
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