High-Performance Chipless Radio-Frequency Identification Tags: Using a slow-wave Approach for miniaturized structure

In this article, we introduce a novel planar chipless radiofrequency identification (RFID) tag. The tag is composed of multiple miniaturized reflecting resonators based on a slow-wave structure. To validate the proposed approach, a tag with a coding capacity of 16 b was designed with a compact size of 15 × 21 mm
²
. Tags with different pattern configurations were fabricated using a Rogers RO4003 substrate, and their radar cross-section (RCS) responses were measured. Compared to conventional multiresonator tags, the proposed tag offers a good miniaturization ratio and spectral coding efficiency. In addition, the measurements revealed a high quality factor (Q-factor) and coding robustness, which demonstrates the efficiency of the used approach to develop high-performance chipless tags.