Uniform Magnetic Field Characteristics Based UHF RFID Tag for Internet of Things Applications

This paper presents a novel inkjet-printed near-field ultra-high-frequency (UHF) radio frequency identification (RFID) tag/sensor design with uniform magnetic field characteristics. The proposed tag is designed using the theory of characteristics mode (TCM). Moreover, uniformity current and performance achieved by further optimizing particle swarm optimization (PSO). Compared to traditional electrically small tags, this uses logarithmic spiral as radiating structure. benefit structure lies in its receiving area that can be extended reach higher reading distance. combination TCM PSO used get desired resonant frequency. was exploited horizontal plane normal phase UHF RFID reader antenna. As compared frequently-used commercial near (Impinj J41), our readable up three times greater read Furthermore, shows great potential for item-level tagging expensive jewelry products sensing applications, such temperature monitoring human body.