| Автор | M A Tsankov |
| Автор | S I Ganchev |
| Автор | B I Vichev |
| Дата выпуска | 1985-08-01 |
| dc.description | A relatively simple technique for measuring the effective ferromagnetic resonance linewidth Delta H<sub>eff</sub> of microwave ferrites is described. The experimental set-up consists of standard available waveguide components. The frequency of a klystron generator is stabilised by a cavity wavemeter, using a moderate-gain feedback DC amplifier. The spherical sample to be measured is placed in the centre of a rectangular H<sub>102</sub> cavity. The resonance frequency shift is determined by the repeller voltage variation necessary to retune the cavity in resonance, while the change of reciprocal Q is calculated from the additional cavity attenuation caused by the sample. A modification of the arrangement suitable for measuring the permittivity of cylindrical samples in a rectangular H<sub>103</sub> cavity is also described. A comprehensive analysis of measurement errors is presented. The estimated inaccuracy of Delta H<sub>eff</sub> is in most cases about 10%, while the errors of real permittivity and loss tangent are less than 3% and 20%, respectively, for loss tangents down to 2*10<sup>-4</sup>. |
| Формат | application.pdf |
| Издатель | Institute of Physics Publishing |
| Название | A simplified technique for measuring the effective resonance linewidth and the permittivity of microwave ferrites |
| Тип | paper |
| DOI | 10.1088/0022-3735/18/8/014 |
| Print ISSN | 0022-3735 |
| Журнал | Journal of Physics E: Scientific Instruments |
| Том | 18 |
| Первая страница | 708 |
| Последняя страница | 711 |
| Аффилиация | M A Tsankov; Inst. of Electron. Bulgarian Acad. of Sci., Sofia, Bulgaria |
| Аффилиация | S I Ganchev; Inst. of Electron. Bulgarian Acad. of Sci., Sofia, Bulgaria |
| Аффилиация | B I Vichev; Inst. of Electron. Bulgarian Acad. of Sci., Sofia, Bulgaria |
| Выпуск | 8 |
