A Dual dipole RFID Tag Antenna Design

A novel tag antenna with two bent meandered strip dipoles and a rectangular-loop feed is designed in ultra high frequency (UHF) radio frequency identification (RFID) band,and its size is 76 mm*31. 4 mm*0. 508 mm。The proposed antenna can provide broadband, high gain and a good radiation pattern simultaneously. For low cost fabrication, the antenna is printed on a single layer substrate without ground plane and shorting pins. The proposed tag antenna has been fabricated,the measured results show that the proposed antenna with resonant frequency of 915 MHz can cover global UHF RFID band 840-960 MHz (S11 <-10 dB). In addition, we measured the input impedance of antenna and the readable range in free space. Both simulated and measured results show that the designed antenna is satisfied with RFID application.