Design Chipless Textile Tag for RFID Application

This paper presents a chipless textile tag for RFID application. The CST microwave studio was used to design the chipless textile RFID tags which consist of three, four, and five slotted ring resonators nested in the circular patch. The RFID tag also fabricated using shieldit super fabric as conductive patch plane and the polyester fabric as substrate. The designed tags can operate over 1 GHz to 3 GHz frequency ranges. Each of the slot ring resonators are generate different reflection coefficient spectrum. The larger the slot ring create a resonate frequency at lower frequency. The measured and simulated results of the different slot ring chipless textile RFID tags are discussed.