RFID tags are increasingly used for critical applications within harsh environments or for secure applications such as identification, counterfeiting protection… However, such low cost systems, initially designed for non-critical applications with a high volume, are not robust by themselves. This paper presents an UHF RF Identification (RFID) tag emulation platform with fault injection and real time monitoring capabilities. The proposed tag emulator is used to increase UHF tags robustness against transient and permanent faults and aims at providing a tool for robust and secure UHF RFID circuit designers.