Title :
Determination of the Gyrotropic Characteristics of Hexaferrite Ceramics From 75 to 600 GHz
Author :
Yang, Bin ; Wylde, Richard J. ; Martin, Derek H. ; Goy, Philippe ; Donnan, Robert S. ; Caroopen, Sylvain
Author_Institution :
Dept. of Electron. Eng., Queen Mary Univ. of London, London, UK
Abstract :
The work reported in this paper is in support of applications of ferrites in measurement systems operating at frequencies in the range 100-600 GHz. Measurements of the magneto-optical characteristics of selected grain-oriented hexaferrite ceramics from 75 to 600 GHz are described; a quasi-optical transmissometer driven by a multiband vector-network-analyser is used to provide the required high dynamic range, spectral-resolution, and scan-speeds. The implications of the results of the measurements are examined.
Keywords :
ceramics; ferrites; magneto-optical effects; measurement systems; millimetre wave measurement; network analysers; optical rotation; submillimetre wave measurement; frequency 75 GHz to 600 GHz; grain-oriented hexaferrite ceramic; gyrotropic characteristics; magnetooptical characteristic; measurement system; millimeter-wave magnetooptics; multiband vector-network analyser; quasioptical transmissometer; spectral resolution; submillimetre-wave magnetooptics; Ceramics; Magnetic resonance imaging; Permittivity; Perpendicular magnetic anisotropy; Resonant frequency; Hexaferrites; millimeter-wave and submillimetre-wave magneto-optics; uniaxial gyrotropic materials;
Journal_Title :
Microwave Theory and Techniques, IEEE Transactions on
DOI :
10.1109/TMTT.2010.2086290
