Evaluation on Characteristics of Wristband Type RFID Antenna
نویسندگان
چکیده
あらまし 近年,RFID(Radio Frequency IDentification)システムは,個人認証や物流管理などに利用さ れるなど,普及が進んでいる.読取り対象となる RFIDタグには様々な形状のものが存在し,用途に適したもの が選択される.その一例として,リストバンド型のタグを用いた個人認証が挙げられる.しかしながら,リスト バンド型のように人体に装着して RFID タグを用いる場合には,人体の誘電性によりアンテナ特性が変化する. そこで本論文では,リストバンド型 RFID用アンテナの特性解析を数値解析及び生体等価ファントムを用いた実 験によって行い,人体がアンテナ諸特性に与える影響を評価した.更に,アンテナに反射素子を装荷することに よる利得改善の検討を行った.以上の結果より,人体がアンテナ諸特性に影響を与えることを確認し,また,反 射素子の装荷により放射特性の改善が可能であることを示した. キーワード RFID,リストバンド,生体等価固体ファントム,反射素子,放射指向性
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