Focusing on providing a plurality of device antennas along a transfer path of the RFID media, and providing a device antenna for verification, the reading and writing verification device comprises: a data reading and writing unit having a first device antenna, a second device antenna and a third device antenna provided sequentially in the transfer path; and a data verification unit having a fourth device antenna provided on a downstream side of the third device antenna, reading and writing of medium data being made sequentially executable by wireless data communication between the data reading and writing unit and the RFID medium, and in the data verification unit, the medium data being read from the RFID medium to enable verification of the medium data.

Systems and methods are provided for measuring and tracking radio-frequency (RFID) tags. Inlay data, converting data, and tag scan data can be received from entities in the supply chain and stored in a database. The tag scan data, including measurement and performance data, can be stored and used for applications such as determining whether RFID tags are defective. The tag scan data, inlay data, and converting data can be analyzed to produce analytic data for reporting and failure prediction purposes. Inlay-SKU combinations of RFID tags can be validated to ensure that the correct inlays are being utilized for RFID tags intended for particular products. More accurate inventory data may be obtained and costs for re-tagging products that have defective RFID tags may be reduced. Entities in the supply chain can also be assisted to comply with various quality control, licensing, and tracking requirements related to the RFID tags.

A Radio Frequency Identification (RFID) tag IC stores an identifier and a check code. The IC determines whether the stored identifier is corrupted by comparing it to the check code. If the stored identifier does not correspond to the check code then the IC may terminate operation or indicate an error. The IC may also reconstruct the correct identifier from the check code.

A radio frequency identification (RFID) system includes an array of antennas to distinguish line-of-sight (LOS) paths from non-line-of-sight (NLOS) paths. The distance between adjacent antennas in the array of antennas is less than half the wavelength of the radio frequency (RF) signal of the system. Each antenna in the antenna array is also digitally controlled to change relative phase difference among the antennas, thereby allowing digital steering of the array of antennas across angles of arrival (AOAs) between 0 and . The digital steering generates a plot of signal amplitudes as a function of AOAs. LOS paths are distinguished from NLOS paths based on the shapes (e.g., depth, gradient, etc.) of local extremes (e.g., maxima or minima) in the plot.

A medium processing device includes a conveying mechanism, an RFID device, and a processor. The processor controls the RFID device to perform a write process on first and second RFID tags of at least one medium conveyed by the conveying mechanism when the first and second RFID tags are moved to a write position along a conveyance path of the at least one medium, and a read process on the first and second RFID tags after the at least one medium is further conveyed along the conveyance path of the at least one medium by the conveying mechanism. The RFID device includes an antenna by which the RFID device communicates with the RFID tags and is configured to set a communication range of the antenna to a first communication range during the write process and to a second communication range wider than the first communication range during the read process.

A radio frequency identification (RFID) system includes an array of antennas to distinguish line-of-sight (LOS) paths from non-line-of-sight (NLOS) paths. The distance between adjacent antennas in the array of antennas is less than half the wavelength of the radio frequency (RF) signal of the system. Each antenna in the antenna array is also digitally controlled to change relative phase difference among the antennas, thereby allowing digital steering of the array of antennas across angles of arrival (AOAs) between 0 and . The digital steering generates a plot of signal amplitudes as a function of AOAs. LOS paths are distinguished from NLOS paths based on the shapes (e.g., depth, gradient, etc.) of local extremes (e.g., maxima or minima) in the plot.