Meander line RFID tag at UHF band evaluated with radar cross sections

This paper presents a meander line RFID tag antenna operating at UHF band. The proposed inductively-coupled tag can be easily designed to have a specific antenna impedance. The designed antenna impedance is 77+j100Ω at 911 MHz. The performance of the antenna is evaluated by monitoring RCS´ corresponding to varied chip impedances. The procedures to determine RCS by EM simulation are described in detail. The tag RCS´ as a function of plane wave incidence angles with different chip impedances are shown to give us complete information about the detection performance.