In order to meet the miniaturization trend of radio frequency identification (RFID) tag antenna，a novel antenna structure based on L TCC technology is proposed．The dimension of the RFID tag antenna are 7.8×8.62×0.8mm．Simulated results show that the proposed antenna has the characteristics of omni -direction and wide bandwidth．Its measured return loss is less than - 10dB in the range 2.4 to 2.5GHz．We also studied the influence of dielectric constantεon the characteristic parameters of antenna．