Scattering of waves by chiral medium-coated dielectric elliptical/circular cylinders with PEC sheath helix loading

Abstract

The paper reports scattering of plane waves by elliptical/circular homogenous, isotropic, and non-magnetic dielectric cylinders coated with chiral medium and surrounded by a perfectly electrical conducting sheath helix structure. The effect of pitch angle on the echo width under the assumption of parallel polarization is discussed, and the results are compared taking into account dielectric cylinders of different dimensions. The introduction of negative refraction in chiral mediums, and its effects on both the elliptical- and circular-shaped scattering objects are evaluated. The results indicate significant impact of the used chiral medium coating as well as the embedded sheath helix structure to alter the bi-scattering echo width of the object.

Keywords:

• Echo width
• scattering
• twisted structures
• chiral mediums
• negative refractive index

Acknowledgment

The authors are thankful to the two anonymous reviewers for making constructive criticisms on the text.