A Technique to Improve RCS in Passive Chipless RFID Tags by Incorporating Array Structure

The vast applications and advantages of chipless Radio Frequency Identification (RFID) tags have taken a broad role in wireless and identification technologies. RFID is replacing barcodes in many contexts due to being in the advantage of not requiring communication with a line of sight. The IoT industry and biomedical sector have seen an enormous use of RFID tags as a sensor for interfacing with different devices. This paper aims to analyze and compare two 5-bits resonator tags. Based on the resonator techniques, the octagonal ring structure and the array of the ring structure are analyzed. The Radar Cross Section (RCS) of both designs is compared to show a better RCS curve was obtained with the array structure. The paper analyses the improvement in RCS using a resonator array. The design uses the substrate of dimensions having a length and width of 26 mm for both. The structure designed for the tag can be used for Ultra-Wideband (UWB) applications.