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Periodic chiral structures

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6 Author(s)
Jaggard, D.L. ; Dept. of Electr. Eng., Pennsylvania Univ., Philadelphia, PA, USA ; Engheta, N. ; Kowarz, Marek W. ; Pelet, P.
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The electromagnetic properties of a structure that is both chiral and periodic are investigated using coupled-mode equations. The chirality is characterized by the constitutive relations DE+iξcB and H=iξcE+B/μ, where ξc is the chiral admittance. The periodicity is described by a sinusoidal perturbation of the permittivity, permeability, and chiral admittance. The coupled-mode equations are derived from physical considerations and used to examine bandgap structure and reflected and transmitted fields. Chirality is observed predominantly in transmission, whereas periodicity is present in both reflection and transmission

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Antennas and Propagation, IEEE Transactions on  (Volume:37 ,  Issue: 11 )