Title :
Electronically Tunable Miniaturized Antennas on Magnetoelectric Substrates With Enhanced Performance
Author :
Yang, Guo-Min ; Xing, X. ; Daigle, A. ; Liu, M. ; Obi, O. ; Wang, J.W. ; Naishadham, K. ; Sun, Nian X.
Author_Institution :
Dept. of Electr. & Comput. Eng., Northeastern Univ., Boston, MA
Abstract :
Achieving relative permeability larger than 1 in antenna substrates can lead to antenna miniaturization, enhanced bandwidth, and tunable resonant frequency. Metallic magnetic films and self-biased ferrite films were introduced as a practical means to tune a patch antenna by loading a commercially available substrate in this paper. Novel antenna designs with metallic magnetic films and self-biased NiCo-ferrite films were investigated. Magnetic patch antennas were demonstrated at 2.1 GHz with a tuning resonant frequency range of 5-10 MHz (with the metallic magnetic films) and 7-23 MHz (with self-biased ferrite films). Three different cases of annular ring antennas with NiCo-ferrite films loading were also designed and analyzed. Antennas with self-biased magnetic films loading working at 1.7 GHz with a tuning range of 3-20 MHz were achieved.
Keywords :
ferrites; loop antennas; magnetic thin films; microstrip antennas; annular ring antennas; antenna design; antenna miniaturization; electronically tunable miniaturized antennas; magnetic patch antennas; magnetoelectric substrates; metallic magnetic films; relative permeability; self-biased ferrite films; tunable resonant frequency; Annular ring antennas; magnetic antennas; patch antennas; self-biased films;
Journal_Title :
Magnetics, IEEE Transactions on
DOI :
10.1109/TMAG.2008.2003062
