Published in Heo, S.J., Rhyu, H., Lee, J.S., Harackiewicz, F.J., Baek, S. H., Park, M.J., & Lee, B. (2006). Electrical loop for 433.92 MHz reader antenna of RFID systems. Antennas and Propagation Society International Symposium 2006, IEEE , 1351 - 1354. doi: 10.1109/APS.2006.1710796 ©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 reader antenna for active RFID technology at 433.92MHz, used for cargo container security, is proposed. The proposed antenna consists of two layer radiating elements excited by a single probe simultaneously. An omnidirectional radiation pattern with φ-component of electric field is obtained by an electrical loop with uniform and in-phase current as the radiating source. Measured peak gain is 2.9dBi, and the average gain is 0.92dBi in x-y plane.