High Radio Frequencies interaction of Composite Materials Using Rectangular Waveguide

The main goal of this paper is studying the composite material behavior under microwave which they used in antennas reflectors. For that, a transmission line method based on X- band WR90 rectangular waveguide used. Bi-anisotropic electrical properties are defined as tensors finite element model. fibers single layer oriented different directions. S-parameters (S11 and S12) calculated using COMSOL Multiyphysics, currents density show that very affected by orientations mean must be considered any design RF equipments, more parallel with field reflection coefficient get higher.