Polarization responsive guides by artificial line anisotropy

The concept of artificial dielectrics has sustained much interest within the electromagnetics community. For instance, compact lenses and polarizers have been designed at microwave and millimeter-wave frequencies along with many other volumetric structures for field control. In these structures an incident wave can be confined and/or transformed due to the periodic loading of sub-wavelength inclusions within a host medium. Most recently these techniques have been adopted to more planar implementations for the routing or tailoring of guided waves. For example, when considering metasurfaces and other transformation electromagnetics-based guides for new transitions and antennas. These engineered materials and surfaces can be characterized using effective material parameters, or more exactly, by permittivity and permeability tensors which may have some spatial dependence.