Electromagnetic responses of magnetic conductive hollow fibers.

Electromagnetic parameters for a magnetic conductive hallow fiber have been derived, and the anisotropy of the magnetic permeability and the electric permittivity for a hollow fiber was demonstrated theoretically. The axial parameters μ// and &eh;// are the key factors related to electromagnetic characteristics of the hollow fiber. Simulations have been carried out to study the axial permeability μ//, and axial permittivity &eh;// of a magnetic conductive hallow fiber with different geometric, and electrical parameters such as diameter, aspect ratio and conductivity The simulations carried out reveal several interesting properties of the hallow fiber's electromagnetic parameters. (1) The parameters μ′//, μ″//, &eh;′// and &eh;″// all decrease with increasing outer radius from 0.5 to 6 µm. (2) When the aspect ratio of the hallow fiber is above 30 µm, μ′// and μ″// remain at constant, while, &eh;′// and &eh;″// are found to increase. (3) The parameters μ′//, μ″//, and &eh;′// all decrease with increasing conductivity, however &eh;″// increases with increasing conductivity. Additionally these simulated results are consistent with reported experimental results carried out on electromagnetically modified hollow carbon fibers. [ABSTRACT FROM AUTHOR]