| 摘要 |
The aim of the invention is to design an RFID transponder, comprising a slot antenna (1) and a RFID tag (6) that has an RFID chip (5) and a coupling loop (4), such that the configuration of the RFID transponder is especially suitable for achieving large ranges. A further aim of the invention is to specify an arrangement by means of which an RFID tag (6) can be operated in a mechanically protected manner on hollow metal bodies, such as a tube. The invention is based on the novel discovery that the desired high range can be achieved not only by maximising the magnetic coupling but also by additionally simultaneously minimising the electrical coupling. The aim of the invention is achieved by both a suitable arrangement and alignment of the RFID tag (6) at the slot (12, 12') and the arrangement of the RFID tag (6) inside a metal body cavity that is closed and hence free from electrical fields of the corresponding wavelengths, for example, the inner cavity of a tube or square profile that forms the antenna body (11", 11"'). |
