Multibit Coded Passive Hybrid Resonator Based RFID Transponder With Windowing Analysis

Abstract

This study proposes novel design options for a compact passive transponder that incorporates both stepped impedance resonators (SIR) and rectangular stub resonators in a hybrid approach. The analysis aims to support the progress of chipless radio frequency identification (RFID) technology by overcoming barriers like cost, size, and coding capacity. A step-by-step analysis of the design ensures a 10-bit coding capacity with a physical footprint of 32 mm × 15 mm having -25.66 dBsm of maximum radar cross-section (RCS) response. The same has been analysed at the receiver with a rectangular windowing approach which enhances the coding capacity and security features of the RFID system. Further, this has been analysed with Hamming, Hanning, and Bartlett windows to show the effectiveness of the windowing techniques in RFID coding. The performance of the tag is analysed for different tilt-angles and read-distances to strengthen the detection accuracy. The hybrid resonator (HR) with windowing analysis is a novel approach to enhance the usage of the transponder by improving the coding capacity, information storage capability, and detection performance in various retail and healthcare domains in the RFID industry.