Abstract: The tag antenna is a key component of RFID systems.Dipole antenna and its modification types are widely used in UHF band.As the reduction sizes of RFID cards,antenna miniaturization becomes one of the research focus.In this paper,a novel miniaturized meader-line dipole antenna with the theoretical detection distance up to 5.6m for UHF radio frequency identification（RFID） tags is presented.The small size is only 22.5mm × 30.5mm ×1.6mm.Good directivity and bandwidth performance are achieved.Introducing the impedance adjustable arms makes the matching between the antenna and microchip be more convenient.This antenna is fabricated using a single layer printed circuit board without any via-hole or shorting plate,the measured results are consistent with the simulated results.