RCS and read range of a UHF RFID tag

The development of a novel RFID tag operating at 869 MHz and its performance evaluation using simulated Radar Cross Section (RCS) are presented. The RCS variations of the tag antenna are evaluated over azimuth and elevation angular ranges for three cases of load: short, matched load and open. The tag exhibits appreciably good differential RCS between its switching states over wide azimuth angular ranges and over the entire elevation angular ranges. The measured read range variations over the azimuth and elevation angular ranges are also presented to validate the simulated results.