A 900-MHz RFID system with TAG-antenna magnetically-coupled to the die

A novel UHF-RFID system which employs a magnetic coupling between the die of a TAG and its external antenna is presented. With respect to the state-of-the-art, the proposed solution avoids the physical connection between die and antenna, thus significantly improving TAG reliability while reducing assembling costs. Thanks to the integrated spiral, on-wafer wireless testing can be performed thus greatly reducing testing costs. Moreover, the arrangement exploiting the TAG-antenna and its interface to the IC is well-suited to be implemented in a low-cost roll-to-roll process by using conductive inkjet on any dielectric material.