6.58 bits/cm2 Data-dense Chipless RFID Tag for Smart Applications

This paper proposes an innovative low-cost, dualpolarized, fully printable, and highly-dense chipless radio frequency identification (RFID) tag. The tag has a compact triangular design and covers a total surface area of 425.57mm
²
. The suggested tag has an encoding capacity of 28 bits, meaning that 2
²⁸
different objects/items can be labeled. It is configured in a way that each slot is of a different length so that it can resonate at different frequencies. The tag is realized on a flexible/bendable substrate, i.e., RT/Duroid 5880, alongside copper as a radiating material. The tag efficiently utilizes the frequency band, i.e., 4.212.5GHz. Due to the presented tag's exclusive features, i.e., flexibility, compact size, and high capacity, it can be easily deployed in various smart Internet of Things (IoT) based applications.