METHOD FOR ADJUSTING FERRITE WAVEGUIDE CIRCULATORS Russian patent published in 1998 - IPC

FIELD: microwave engineering; adjustment of quantity produced ferrite waveguide circulators. SUBSTANCE: during quantity production, natural-oscillation spectra of magnetized ferrite cavity are pre-calculated and compared experimentally at two reversed polarities; geometry of ferrite cavity, its physical parameters, and magnetizing field strength are chosen proceeding from following conditions; oscillation frequency f_n of magnetized ferrite cavity of single azimuthal variation coincides with central frequency f_ц of service bend Δf at saturation direction ensuring desired circulation direction: f_n=f_ц; in frequency range of f_n to f_-n, where f_-n is oscillation frequency of magnetized ferrite cavity of single azimuthal variation rotating in direction opposite to frequency f_n, other natural oscillations of magnetized ferrite cavity do not occur; condition Δf, where Δf < 2Δf_max,, is natural oscillation frequency of magnetized ferrite cavity closest to f_c, should be true for desired service band of frequencies f_n. EFFECT: improved optimization of circulator characteristics and reduced adjustment time during quantity production. 11 dwg