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Analysis of the microwave magnetic permeability spectra of ferrites with hexagonal structure

“…The wide bandwidth of the resonance measurements was attained with a set of resonators by using the frequency variation method with multimoding. For the intermediate range, where methods with distributed and lumped parameters are equally applicable (0.2-1 GHz), measurements were additionally performed on a nonregular microstrip resonator [12] made of high-dielectric-permittivity ceramics with a specimen shaped as a thin plate having the dimensions of the air gap between the strip lines, 10×10×1 mm. The static initial permeability was determined by the inductance of a toroid measured at a frequency of 1 kHz.…”

Electromagnetic Waves Absorbing Characteristics of Composite Material Containing Carbonyl Iron Particles

“…Measurements were performed in the frequency range 10 MHz -20 GHz. A coaxial waveguide (R/T method, [12]), an irregular microstrip resonator [14] [15], and a set of rectangular multimode volume resonators [16] were used as measuring cells.…”

Analysis and correction of the magnetic permeability spectra of Ba3Co2Fe24O41 hexaferrite by using Cramers-Kronig relations

“…For the high-frequency range (0.9-11 GHz), transmission-type rectangular resonators with type Н 10n oscillations were used in which samples shaped as thin cylinders (diameter 1-2 mm, length 23-75 mm) [17] were placed. For the range where methods with distributed and lumped parameters are applicable (0.2-1 GHz), measurements were performed on a nonregular microstrip resonator [18] made of high-permeability ceramics with the sample shaped as a thin plate of width 5 mm, length 10 mm, and thickness 1 mm. The use of three various measuring methods with superimposed frequency ranges on variously shaped samples made the experimental results obtained more reliable.…”

“…The microwave duct was made as a set of elements of conventional meters of the voltage standing wave ratio. The data processing rate and the quality of the experiment were increased due to the use of a personal computer because the measurements were performed in real time [18]. The phase composition of the samples was examined by x-ray diffraction analysis; the basic Z-phase made 95%.…”