Chipless RFID tag design, simulation and measurement with data processing method

• Main Author: Liu, Lingyu.
• Other Authors: Lu Yilong
• Format: Final Year Project
• Language: English
• Published: 2013
• Subjects: DRNTU::Engineering
• Online Access: http://hdl.handle.net/10356/54395
• Institution: Nanyang Technological University

Chipless (Radio Frequency Identification) RFID tag is low cost and can be a replacement of barcode in the future. One method is spectral signature based chipless RFID tag design which enables the tag to be fully printable, large data capacity and low cost compare with other chipless RFID tag design techniques. In this project, one of the novel techniques called slot loaded chipless RFID tag design is studied and implemented. With FEKO simulation tools, this slotted chipless RFID tag is designed and simulated, by which RCS (Radar Cross Section) result is obtained to observe its frequency signature. Frequency signature is the resonant null at corresponding frequency. Followed by real testing is implemented with horn antennas, network analyzer and chipless tags. By modifying its slot length, the frequency spectrum is reduced to fall within 1 and 3 GHz, where require less power and signal can propagate further. Lastly and most significantly, the raw testing data is analyzed and processed using MATLAB to obtain final frequency response spectrum (S21) and demonstrate this chipless RFID tag design is practical. Additionally, a novel stripe loaded chipless RFID tag is designed, simulated and tested. FEKO software is used to design and simulate its RCS response. In this design, frequency signature is the resonant peak at its corresponding frequency, which is opposite with the slot loaded design. Finally, the testing is conducted and data is process to get S21 spectrum, and unique frequency signature can be discovered. Upon completing this project, there could be some improvements can be done in the future, such as, enlarge tag data capacity, improve design and reduce its size, and improve data processing method.