PROBLEM TO BE SOLVED: To provide an earmark RFID tag for animals, reducing the influence by a living body such as the ear or the face of an animal of a managed object, and the interference of antennas to each other even when two RFID tags of dipole antennas are used as the antenna element.SOLUTION: The earmark RFID tag for animals includes a tag part having a hole part, the first dipole antenna which is installed in the tag part and in which the first IC chip is electrically connected to the first power-supplying part through the first matching line, and the second dipole antenna which is installed in the tag part so that the second power-supplying part may face to the first power-supplying part, and in which the second IC chip is electrically connected to the second power-supplying part through the second matching line. The first angle that the direction directed from the hole part to the first power-supplying part makes with the slope of the first dipole antenna, and the second angle that the direction directed from the hole part to the second power-supplying part makes with the slope of the second dipole antenna are regulated so as to be different.COPYRIGHT: (C)2010,JPO&INPIT【課題】 アンテナ素子がダイポールアンテナのRFIDタグを二つ用いても、管理対象の動物の耳や顔などの生体による影響やアンテナ同士の干渉を低減した動物用耳標RFIDタグを提供することを目的とする。【解決手段】 穴部を有する札部と、この札部に設けられ、第1の給電部に第1の整合線路を介して第1のICチップが電気的に接続された第1のダイポールアンテナと、前記第1の給電部に第2の給電部を対向させ、前記札部に設けられ、前記第2の給電部に第2の整合線路を介して第2のICチップが電気的に接続された第2のダイポールアンテナと備え、前記穴部から前記第1の給電部に向かう方向と前記第1のダイポールアンテナの傾きとが成す第1の角度及び前記穴部から前記第2の給電部に向かう方向と前記第2のダイポールアンテナの傾きとが成す第2の角度が異なる角度であることを特徴とする。【選択図】 図1
