Abstract
Recently, circular polarizer with cylindrical double-helical metamaterials
has been proposed to broaden the operation band of cylindrical single-helical
metamaterials, but its extinction ratio is deteriorated. In this paper, we
proposed a circular polarizer with conical double-helical metamaterials, which
have a large extinction ratio of 83:1, more than four times higher than that
of cylindrical double-helical metamaterials. Furthermore, we gave a qualitative
interpretation about this phenomenon through analyzing the interaction between
two helical wires in one unit cell of the circular polarizer.
© 2012 IEEE
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