Research of RCS of passive UHF RFID tag

The radio frequency identification (RFID) technology has been intensively studied in different frequency bands and widely deployed across various applications. In this paper, we present a new way to observe the RCS of backscattering RFID tags. The new method obtains the relationship not only between RCS and aspect angle, between RCS and frequency, but also between RCS and the size of antenna. A tag antenna with rectangular thin flat plate specifically designed for working in the ultra-high-frequency (UHF) band is used to validate the method. The numeric results show the validity of the new method which is valuable to help the design of RFID tags.