SHIELDING AND REFLECTION PROPERTIES OF PERIODIC FIBER-MATRIX COMPOSITE STRUCTURES

The plane-wave Shielding and reflection properties of a single-layer c omposite material are analyzed, based on a filament-current phase-corr ection model that treats the composite material as a lossy periodic st ructure of fibers situated in a dielectric matrix, The scattering effe ct of the fibers is dealt with by calculating the scattered fields fro m the fiber currents, which are assumed to be concentrated along the c enters of the fibers, To include the effect of the dielectric matrix, multiple reflection and transmission at the air-matrix interfaces, as well as the phase correction across the fiber grating, are incorporate d in the analysis, In this study, only numerical results for the TM ca se are presented for graphite/epoxy composite materials, In particular , the parameters that influence the shielding and reflection character istics, such as the angle of incidence and the frequency of the incide nt wave, the conductivity and radius of the fibers, and the dielectric constant of the matrix, are investigated in detail, Also included are results to illustrate the frequency-selective phenomena associated wi th composite structures.