Design Of Multi-Bit Chipless RFID Tag Using Hybrid Resonator For Retail And Healthcare Applications

Durga Prasad Mishra; Amrutha Subrahmannian; Santanu Kumar Behera

Abstract

Resonators play a very important role in chipless radio frequency identification (RFID) systems. To overcome the challenges like cost, compact dimension, and high coding capacity, chipless transponders are highly facilitated for the advancement in chipless RFID technology. This research aims to investigate innovative design options for passive RFID transponders operating in a wide range of frequencies in order to address the aforementioned issues and contribute to RFID technology advancement. To accomplish this, the resonator concept is highly usable, which has recently been sparked by a wide range of useful applications within the microwave community. In this article, a passive chipless RFID transponder is proposed based on a hybrid approach. The tag utilizes both the split-ring resonator and the stepped impedance resonator concept to form a 10-bit coding capacity with a compact structural geometry of 16 mm2. The ability of the tag for object detection is based on the backscattering mechanism with a maximum RCS found to be -22.04 dBsm. The multiple frequencies of resonances cover a wide range of applications covering UHF, UWB, and ISM bands. A compact dimension with an operating frequency ranging from 0.5 GHz to 6 GHz makes the tag open for retail, tracking, and healthcare applications. The 2.4 GHz and 5.8 GHz bands can be extensively used for medical applications. The design theories with the recent literature presented in the article give a primary insight as per readers point of view for better analysis about the research work. Two comparison tables are presented with related current literature covering several features of chipless RFID transponder with a wide range of applications.

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