Dual-band RFID tag antenna with EBG for glass objects

The dual-band tag antenna designed for glass objects of HF-RFID (13.56 MHz) and UHF-RFID (920-925 MHz) applications along national standard of Thailand is proposed. The tag antenna has the same size with a credit card. The overall dimension of the tag antenna with EBG is 147 mm × 73.5 mm × 8.3 mm. The purpose of this antenna design is to implement with the RFID for the highway tracking and tolls systems. The tag antenna and EBG are designed on FR-4 substrate with thickness of 0.3 mm and 3 mm, respectively. To achieve the dual band operation, the designed tag antenna with EBG structure is based on the loop (spiral coil), the meander-line structure with double T-matching and mushroom-like EBG structure for HF-, UHF-RFID and EBG, respectively.