Design of a Chipless RFID Tag for 2.4 GHz and 5.8 GHz ISM Band Applications

This paper presents the design, simulation, and fabrication of a two-bit chipless RFID tag dedicated to ISM band application. Now, tagging technology is getting more efficient than optical barcodes. The RFID technology has appeared as a promising alternative to extract the encoded data from the tags utilizing the radio frequency waves. Frequency coding techniques have been used to enhance the coding capacity of chipless radio frequency identification (RFID) tag as well as to improve the radar cross-section (RCS) magnitude level. The cost of the tag is potentially less due to the absence of a ground plane for the fabrication process. The proposed tag is fabricated on an FR-4 substrate having permittivity 4.4 and loss tangent 0.02. The proposed tag resonates at the frequency of 2.4 GHz and 5.8 GHz Industrial, Scientific and Medical (ISM) radio bands. The simulated results were validated by the bistatic measurement of the fabricated tag.