MICROSTRIP CIRCULATOR Russian patent published in 2003 - IPC

FIELD: isolating devices of extremely-high-frequency band. SUBSTANCE: microstrip circulator has insulating substrate, set of three metal strips, ferrite member with partially metallized surface mounted on insulating substrate, and magnetic system; novelty is that ferrite member is made in the form of cylinder or polyhedral prism, that strips are electrically insulated from each other and disposed do that their ends abut against ferrite member or project under the latter approaching each other through distance greater than strip width, that ferrite member base is confined in circle or polyhedron inscribed in this circle, diameter d of the latter being within range found from formula , where n is numerical coefficient ranging between 150 and 300; ε_f is dielectric constant of ferrite; f_med is medium operating frequency; ferrite member height h is found from formula , where k is numerical coefficient ranging between 0.2 and 0.5; λ_med is wavelength corresponding to medium operating frequency. EFFECT: enhanced maximal operating frequency of circulator at its high electromagnetic characteristics. 5 cl, 8 dwg