Published in Baek, S. H., Lee, B., & Harackiewicz, F. J., (2007). Multi-band internal loop antenna with inserted concentric rings for mobile terminals. Antennas and Propagation International Symposium, 2007 IEEE, 4725 - 4728. doi: 10.1109/APS.2007.4396599 ©2007 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.


Loop Antenna with inserted concentric rings is proposed for mobile terminals. Inserting concentric ring(s) on the loop element improves the impedance bandwidth of the proposed antenna. Measurement results show that the bandwidth includes GSM, DCS, PCS, and UMTS bands.