ABSTRACT
This chapter considers Radio frequency identification device (RFID) label antennas for both near-field operation in the High Frequency region and far-field operation in the Ultra High Frequency (UHF) frequency range. To aid in the development of UHF tag antennas, the chapter contains material on the formulation of antenna equivalent circuits and presents an RFID label antenna design methodology, illustrated in the far field with the design of long-range, bow-tie antennas for tagging cases and pallets. There are numerous label antenna designs, each with their own set of characteristics. Antenna designs are influenced by a range of issues, such as the region of label operation, the coupling field, the regulatory constraints, and the environment in which they operate. An antenna can be considered as an electromagnetic field antenna on a couple of different bases. The chapter illustrates a successful antenna design for a passive RFID label that can be placed on corrugated cardboard boxes containing dry goods.
