期刊
APPLIED PHYSICS LETTERS
卷 95, 期 9, 页码 -出版社
AMER INST PHYSICS
DOI: 10.1063/1.3223608
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资金
- National Science Foundation of China [60871016, 60671015]
- Natural Science Foundation of Jiangsu Province [BK2008031]
- National Basic Research Program (973) of China [2004CB719802]
- 111 Project [111-2-05]
A planar lens made of gradient index metamaterials can transform cylindrical waves to plane waves, and the beam direction of plane waves is controlled by adjusting the refractive-index distributions of the lens. Based on such properties, we present high-performance beam-scanning antennas experimentally using the gradient-index planar lens and horn antenna. The lens is carefully designed with metamaterials to achieve different refractive indices and good matching of impedance. The near-field distributions of antennas are measured using a two-dimensional near-field microwave scanning apparatus, and the radiation patterns are presented to show the high directivity and low sidelobe. (C) 2009 American Institute of Physics. [DOI: 10.1063/1.3223608]
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