Investigations on resonating structures for chipless rfid tag with enhanced capacity

Abstract

Radio Frequency Identification is a fast and reliable communication module, which performs automatic data capturing to identify and track individual objects and people. Because of its high data rate, robustness, security authentication, planar, and several other advantages, RFID turns out to be one of the prominent data capturing technology in many areas of everyday life applications in logistics, production systems, traceability, urban transport, or in wireless sensor networks and the Internet of Things (IoT). Frequency-coded tags use resonant structures to obtain their identification code. The data are encoded using a multi-resonant or multi-scatterer approach. Specific studies related to the current research work projected the resonating structure for chipless RFID tags with high bit encoding capacity. The simulation, optimization, fabrication, measurement procedures, and data encoding methods for chipless RFID tags are addressed in this thesis. newlineThe first module of the proposed methodology employs multi-resonating structures to design an L shaped arm, an open-ended stub with a quarter wavelength, and a meandered line. The L-shaped arm is introduced into the guided filter structure, with an approximate gap between the resonators to avoid unwanted harmonics or spurious speaks and minimize coupling. A solution to the size drawback of the quotLquot shaped arm multi-resonator is to go with an open stub multi-resonator. The circuit is constructed on an FR4 substrate with a dielectric permittivity of 4.4 and tangent loss of 0.0018. Multi-resonators with meandered lines can replace open stub multi-resonators with newline