Miniaturized Dual-Band Patch Antenna Mounted on Metallic Plates for RFID Passive Tag

Some problems appeared with the growing interest of the Radio Frequency Identification (RFID) applications, especially for the identification of metallic objects. This paper describes a novel dual-band antenna which could be mounted on metallic objects for RFID tag. The antenna is fabricated using a single layer printed circuit and fed by inductively coupled feeding structure which is placed on the middle of two radiating patches. In the two radiating patches, double L-shaped slots are inserted to achieve miniaturization. The size of proposed antenna is 63.6×59.04mm², a 52.9% area reduction compared to the original design. The simulation results show that the proposed antenna has good performance on metallic objects both at 915MHz and 2.45GHz.