Design of miniaturized UHF RFID tag antenna attached to dielectric and metallic objects

In this article, a compact antenna is presented with an appropriate structure which has a good performance used on the dielectric and metallic objects. The loading bar and the meandered section are added to achieve a proper impedance matching between the antenna input terminal and the reference microchip whose impedance is 13-j143Ω. The antenna´s wings are utilized to improve the performance when attached to the metal surface. The size of the antenna is 50mm×20mm×1.6mm and the simple structure ensures the easy and low-cost fabrication. The simulated results show that the impedance bandwidth (return loss≤-10dB) is 100MHz (866MHz-966MHz) and 166MHz (800MHz-966MHz) when implemented on the dielectric and metallic objects, respectively.