Multi-resonator Based Passive Chipless RFID Tag for Tracking Applications

Radio Frequency Identification is an evolving technology that has revolutionized the modern era of wireless telecommunication. The purpose of the research is to design and analyze the low-cost chipless RFID tag to mitigate the cost issue due to silicon IC in the chip-based tag. The tag design consists of rectangle-based multi-resonating structures. The tag encodes 6-bit data in the frequency ranges from 3.4 – 4.6 GHz for the rigid Taconic TLX-0 substrate and from 5.8 – 6.8 GHz for the flexible DuPont™ Kapton®HN substrate. The 6-bit tag structure can generate 26= 64 distinct tag IDs. Each resonator in the tag design corresponds to a particular frequency in the RCS curve. The cascaded rectangle-based resonators are placed next to the micro-stripline. The overall dimension of the tag is 119 mm x 15.5 mm. Each resonating dip depicts the logic state ‘1’ and, the ‘0’ bit is identified when there is no resonating dip. The passive nature of chipless tags eliminates the need for an external circuitry/battery which makes these tags suitable for deployment in the retail industry where there is a requirement for such low-cost tags. Because of its non-line-of-sight feature, it has gained more significance. RFID has the potential to compete with barcode technology because of its long-read range and cost-effective nature.