Published in Yu, B., Kim, S. J., Jung, B., Harackiewicz, F.J., Park, M. J., & Lee, B. (2006). Balanced RFID tag antenna mountable on metallic plates. Antennas and Propagation Society International Symposium 2006, IEEE, 3237 - 3240. doi: 10.1109/APS.2006.1711301 ©2006 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE. This material is presented to ensure timely dissemination of scholarly and technical work. Copyright and all rights therein are retained by authors or by other copyright holders. All persons copying this information are expected to adhere to the terms and constraints invoked by each author's copyright. In most cases, these works may not be reposted without the explicit permission of the copyright holder.


A novel balanced tag antenna for radio frequency identification (RFID) system is presented. The radiating elements of two planar inverted-F antennas (PIFAs) are inductively coupled by the feed loop with out of phase. The balanced structure provides smaller degradation of performances when an RFID tag is mounted on the various sizes of metal plates. The HFSS simulator is employed to analyze the proposed antenna in the design process and to compare with measured results.