True 3D antenna for UHF RFID application

Abstract

This paper presented a new kind of Omni-directional UHF RFID tag antenna. The antenna is composed of four identical arrow-shape modules that are completely center-symmetric. Compared with the traditional dipole planar antenna, the antenna proposed has a -10dB bandwidth at 244MHz and shows better performance in Omni-direction in the reading range. The new Omni-directional UHF RFID tag antenna can effectively eliminate the reading blind spots caused by the antenna direction.