Contribution on UHF RFID antenna design and tag fabrication

In this paper, the authors present some problems occurring during UHF RFID tag design and fabrication process. A tag antenna must be conjugately matched to a tag IC chip (on the example of ST Microelectronics XRAG2 chip) at the resonant frequency with larger bandwidth and have dipole radiation patterns with sufficient gain. Another example of RFID tag was also given using an AK Tagsys loop with a chip mounted on it that showed a prospective design and fabrication approach thanks to its simple testing process. Some prototypes on different designs have been successfully fabricated, tested by Rohde & Shwarz ZVB Vector Network Analyzer and showed good fit with the simulations.