RFID System with Distributed Read Structure

摘要

A radio frequency identification (RFID) system includes a portable RFID reader, and a read infrastructure that includes a distributed read structure, which may be part of a display (such as a shelf) for holding objects. The read structure is used to couple the RFID reader to RFID devices (tabs and/or labels) on or near the structure. The RFID reader and the read structure communicate in a near field or proximity region communication, without any use of a direct ohmic electrical connection. The RFID reader may have an antenna that is configured for near field or proximity communication with a coupler of the read infrastructure. The RFID reader may also have a separate antenna for use in far field communication. The RFID reader may be able to obtain information more efficiently in the near field or proximity mode, allowing information to be received faster and with greater reliability.

主权项

1. A read infrastructure for radio frequency identification (RFID) devices comprising:
a distributed read structure for proximity coupling with RFID devices within one wavelength of radiation emitted by the read structure; and a coupler, electrically connected to the read structure, for proximity coupling to an RFID reader wherein the reader includes a first antenna and a second antenna such that either the first or second antenna is used for proximity coupling and the other of the first and second antenna is not used for proximity coupling is used for far field coupling.