Propagation Model and Performance Analysis for Short Range Microwave Passive RFID Systems

RFID systems are an important technique in short range wireless communication. This study explores link budget and performance limitations of microwave passive RFID system. Site-specific model and statistical model are proposed for mean path loss. The key parameters affecting the performance are studied, including reader limitations, tag limitations, multi-path propagation environments, and antenna polarization. The optimal work conditions are given for short-range microwave passive RFID systems.