期刊
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
卷 61, 期 5, 页码 2561-2569出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TAP.2012.2237534
关键词
Gradient-index materials; Luneburg lens; Maxwell fisheye lens; three dimensions
资金
- National Science Foundation of China [60990320, 60990321, 60990324, 61138001, 61171024, 61171026]
- National High-Tech Project [2011AA010202, 2012AA030402]
- 111 Project [111-2-05]
In this paper, we introduce a method to realize 3-D inhomogeneous and nearly isotropic gradient-index materials in the microwave regime. The unit cells of such gradient-index materials are drilled-hole dielectric structures, which can be easily fabricated by using the traditional printed circuit boards. To demonstrate the feasibility of the proposed method, we design and realize two functional devices in themicrowave frequencies-a half-spherical Luneburg lens and a half Maxwell fisheye lens-based on 3-D gradient-index materials. The measurement results show that both devices have very good performance, which have good agreements to the numerical simulations, illustrating the great application potentials of the 3-D gradient-index materials.
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