Title :
Development of high frequency ferrite phase-shifter
Author :
Zuo, Xu ; How, Hoton ; Shi, Ping ; Oliver, S.A. ; Vittoria, Carmine
Author_Institution :
Dept. of Electr. & Comput. Eng., Northeastern Univ., Boston, MA, USA
fDate :
7/1/2001 12:00:00 AM
Abstract :
A phase-shifter was fabricated on a c-texture Zn2Y (Zn 2Ba2Fe12O22) single crystal substrate, and tested over microwave frequencies from 2 to 35 GHz and for biasing magnetic fields from 0.2 to 5 kOe. The differential phase-shift rate was 90°/kOe.mm at a microwave frequency of 20 GHz and a magnetic bias-field of 1.3 kOe. This device showed that it is possible to reduce the bias-field requirement efficiently and simply by utilizing the large in-plane anisotropy in Y-type hexaferrites and magnetostatic modes. A simple model based on the conjugate method for a TEM wave gave a reasonable match with the measured performance of the device, when the uniaxial magnetic anisotropy and magnetostatic modes were included
Keywords :
barium compounds; ferrite phase shifters; magnetic anisotropy; magnetic microwave devices; magnetostatic wave devices; microwave phase shifters; zinc compounds; 2 to 35 GHz; TEM wave; Y-type hexaferrite; Zn2Ba2Fe12O22; c-texture Zn2Y single crystal substrate; conjugate method; magnetic field; magnetostatic mode; microwave ferrite phase shifter; uniaxial magnetic anisotropy; Ferrites; Iron; Magnetic anisotropy; Magnetic devices; Magnetic fields; Magnetostatic waves; Microwave frequencies; Perpendicular magnetic anisotropy; Testing; Zinc;
Journal_Title :
Magnetics, IEEE Transactions on
