Title :
Measurement of ferrites tensor permeability by spherical cavity resonator
Author :
Okada, F. ; Tanaka, H.
Author_Institution :
Dept. of Electr. Eng., Nat. Defense Acad., Yokosuka, Japan
Abstract :
The authors describe the measurement of the microwave tensor permeability of a ferrite biased with a DC-magnetic field using a spherical cavity resonator. The principle of measurement, a practical spherical cavity, the measurement system, and the measurement results on YIG ferrite at 10 GHz are presented. The Q value of the spherical cavity is shown to be about 1.5-2 times higher than that of the rectangular or circular cavity resonator, making this cavity appropriate for precise measurements. Exact solutions can be obtained using this method. Using a spherical ferrite sample, the internal H/sub DC/ field is uniform and can be exactly calculated.<>
Keywords :
cavity resonators; ferrites; magnetic permeability measurement; yttrium compounds; 10 GHz; DC-magnetic field; Q value; YFe5O12; YIG ferrite; ferrites tensor permeability; magnetic permeability; spherical cavity resonator; Cavity resonators; Dielectric measurements; Ferrites; Magnetic field measurement; Magnetic fields; Microwave measurements; Permeability measurement; Perturbation methods; Polarization; Tensile stress;
Conference_Titel :
Precision Electromagnetic Measurements, 1990. CPEM '90 Digest., Conference on
Conference_Location :
Ottawa, Ontario, Canada
DOI :
10.1109/CPEM.1990.110001
