This paper proposes a dual band folded dipole antenna for harmonic radio frequency identification (hRFID) systems operating at 433 MHz and 866 MHz. With directivity of 4.3 dBi at 866 MHz and compact size. The antenna offers efficient and practical communication in hRFID applications. Measurements in an anechoic chamber confirm its performance, making it a promising solution for enhancing conventional UHF RFID systems without extensive modifications.