A PRINTED DIPOLE ANTENNA FOR RFID TAG AND THE DESIGN METHOD THEREFOR

摘要

The present invention relates to a printed dipole antenna provided in an RFID tag and a method of designing the same. More particularly, it relates to a printed dipole antenna, wherein a microstrip balun for connecting a printed dipole and a ground plate is disposed on one surface of a substrate and is connected to a feeding line disposed on the opposite surface of the substrate through a via hole passing through the substrate, so that the feeding line and the printed dipole can be effectively matched to each other and distortion of a radiation pattern due to a leakage current can be prevented. The printed dipole antenna for an RFID tag comprises a substrate, a printed dipole including a pair of rectangular arms disposed on a top surface of the substrate, a ground plate disposed on the top surface of the substrate to be spaced apart from the printed dipole, a microstrip balun for connecting each of the arms of the printed dipole to the ground plate, and a feeding line disposed on a bottom surface of the substrate and connected to the microstip balun through a via hole passing through the substrate.