RESONANCE PROPERTIES OF BI-HELIX MEDIA AT MICROWAVES

In this paper, a novel inclusion shape (hi-helix) for artificial magne tic composites is studied. The developed analytical model is used to a nalyze the eigenmodes and frequency dispersion of the polarizabilities . Experimental investigations (cavity measurements) reveal the main fe atures of the physical phenomena of electromagnetic excitation of indi vidual bi-helix particles. Sheet samples of hi-helix composites are st udied by free space measurements. The results lead to the conclusion t hat the use of new particles can help to improve electromagnetic param eters of magnetic composites. In particular, the magnetic moments appe ar to be larger than in conventional inclusions, and the resonance fre quency of the magnetic permeability is different from that of the effe ctive permittivity.