Analysis and Measurements of Tag's Delta RCS Based on LabVIEW

Delta radar cross section(ΔRCS) is an important parameter to describe performance of passive UHF RFID tag,which determines the bit error rate(BER) of backscattered link.However,ΔRCS can't be measured directly,and so,indirect method must be considered.Tag's reflective vector signal analysis program was developed based on RF module of National Instruments,and method for measurement of tag's ΔRCS was presented.Effects of different attachment materials and transmission powers on ΔRCS were analyzed and measured.