Polarization Of Incident Plane Wave Research Articles

Evolution properties of polarization states of far-zone electromagnetic field scattered from an anisotropic medium.

Within the accuracy of the first-order Born approximation, expressions are derived for the cross-spectral density matrix of the electromagnetic field scattered from a three-dimensional (3D), spatially anisotropic medium. By using the analytical forms of the spectral degree of polarization (SDOP), semi-major axis, semi-minor axis, and orientation angle of the polarization ellipse, we illustrate the evolution properties of the polarization states of the far-zone scattered field. Dependences of the polarization ellipses on different combinations of correlation lengths of the medium and polarization of incident plane wave are also revealed through numerical simulations. It is shown that the polarization ellipse of the scattered field can be either stretched or squeezed along certain scattering angles, strongly depending on the anisotropic statistics of medium and polarization of incident plane wave. Our results substantially enrich the study on the reciprocal relations between the far-zone scattered properties and correlation statistics of a spatially anisotropic medium.

Simulation of polarizer based on chiral medium for terahertz frequency range

The work is devoted to development of the polarizer for terahertz frequency range. Chiral medium was simulated using the software package CST Microwave Studio by the method of Finite-Differences in Frequency Domain. The influence of geometry of chiral unit cell on the polarization of incident plane wave was investigated.

Reflection Phase and Frequency Bandgap Characteristics of EBG Structures with Anisotropic Periodicity

An anisotropic mushroom-like electromagnetic bandgap (EBG) structure is studied. Different to the conventional EBG structures with square unit cell, the presented EBG structures are with anisotropic periodicity. The periodic spacing or the metal patch length is different along the two periodic directions. So the reflection phase and the frequency bandgap will show distinct characteristics compared to the conventional EBG structures. These two features of the anisotropic EBG structures have been calculated numerically using FDTD method. The results show that the frequency of in-phase reflection is dependent on the polarization of incident plane wave, and the frequency bandgap along the two orthogonal directions could be designed to be similar or even overlapped.