High-directivity antenna with small antenna aperture

Yu Luo; Jingjing Zhang; Hongsheng Chen; Jiangtao Huangfu; Lixin Ran
November 2009
Applied Physics Letters;11/9/2009, Vol. 95 Issue 19, p193506
Academic Journal
We show in this letter that, by using an inhomogeneous metamaterial shell, it is possible to achieve highly directive emission with a small antenna aperture. The material parameters of the metamaterial substrate are obtained by a nonmonotonic optical transformation. Therefore, a large antenna can be effectively transformed to an equivalent one with much smaller aperture. Full-wave finite-element modeling has been performed to confirm this point. The concept proposed here provides a possible solution to reduce the size of antenna without disturbing the radiation characteristics.


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