Published in Rainville, P.J., & Harackiewicz, F.J. (1992). Magnetic tuning of a microstrip patch antenna fabricated on a ferrite film. IEEE Microwave and Guided Wave Letters, 2(12), 483-485. doi: 10.1109/75.173402 ©1992 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 square, single-feed patch, fabricated on a ferrite film, that produced orthogonally polarized, well-formed radiation patterns is described. The application of a small in-plane magnetic field tuned the frequency, and hence phase, of one polarization only. Prior work on patch antennas fabricated on bulk ferrite substrates demonstrated magnetic tuning, but only linear polarization was obtained. The results indicate that 1) thin ferrite films, which are monolithically integrable, may be useful for a magnetically tunable antenna, and 2) the radiation polarization of the patch can be varied by the application of a small in-plane magnetic bias field.