Reduced-Size Double-Shell Lens Antenna With Flat-Top Radiation Pattern for Indoor Communications at Millimeter Waves

被引:49
作者
Ngoc Tinh Nguyen [1 ]
Sauleau, Ronan [1 ]
Le Coq, Laurent [1 ]
机构
[1] Univ Rennes 1, CNRS, IETR, UMR 6164, Rennes, France
关键词
Double shell dielectric lens; lens antenna; millimeter wave; shaped beam; DIELECTRIC LENSES; BAND; DESIGN; OPTIMIZATION; PERFORMANCE; ACCESS; 2-D;
D O I
10.1109/TAP.2011.2144554
中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
0808 ; 0809 ;
摘要
We investigate the capabilities of reduced-size integrated lens antennas to produce flat-top radiation patterns for broadband wireless communication systems at millimeter waves. The main challenge consists in controlling accurately the lens radiation performance over a broad frequency band while reducing its size; this constitutes a difficult task since producing highly shaped beams usually leads to oversized lens antennas. The design procedure is based on the geometrical optics/physical optics method (GO/PO), and the antenna characteristics are confirmed by full-wave simulations since the antenna size is only a few wavelengths. Our numerical results demonstrate that one anti-reflection coating is necessary even if the lens is made in a low-permittivity material (Rexolite). The resulting double-shell dielectric lens antenna has been fabricated and measured. The experimental results are in very good agreement with the simulations, and the radiation characteristics are stable over a 14% relative bandwidth, which is enough for broadband communications at millimeter waves.
引用
收藏
页码:2424 / 2429
页数:6
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