Published in Harackiewicz, F., &Pozar, D. (1986). Optimum shape synthesis of maximum gain omnidirectional antennas. IEEE Transactions on Antennas and Propagation, 34(2), 254-258. ©1986 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.


Using characteristic mode shape synthesis, some antenna surfaces and their current distributions are found which produce maximum realizable gain for rotationally symmetric omnidirectional antennas. The same shape synthesis method fails to produce antennas which have maximum endfire gain.