A Broadband Bessel Beam Launcher Using Metamaterial Lens.
A Broadband Bessel Beam Launcher Using Metamaterial Lens.
复制标题
使用超材料透镜的宽带贝塞尔光束发射器。
DOI：
10.1038/srep11732
复制
发表时间：
2015-06-30
影响因子：
4.6
通讯作者：
Cui TJ
中科院分区：
文献类型：
--
作者：
Qi MQ;Tang WX;Cui TJ
提出了一种产生宽带贝塞尔光束的方法。宽带贝塞尔光束由宽带波导天线照射的梯度折射率 (GRIN) 超材料透镜产生。超材料透镜采用多层结构，每层均由GRIN超材料组成。超材料被设计为在中心区域印有金属图案的介电板，并在边缘附近钻有气孔，其在宽带中工作。超材料透镜充当转换器，将从馈源发出的球形光束转换为锥形光束。锥形光束在近场区域形成准贝塞尔光束。 GRIN透镜的孔径远大于工作波长以保证变换。原则上，这种超材料透镜可以通过设计折射率分布来产生任意距离的贝塞尔光束。为了验证该方法，我们设计、制造并测试了超材料透镜。全波仿真和实验结果证明，所产生的贝塞尔光束在12GHz到18GHz范围内可以保持大于1米的距离。
An approach of generating broadband Bessel beams is presented. The broadband Bessel beams are produced by a gradient index (GRIN) metamaterial lens illuminated by broadband waveguide antenna. The metamaterial lens is constructed with multi-layered structure and each layer is composed of GRIN metamaterials. The metamaterials are designed as dielectric plates printed with metallic patterns in the center region and drilled by air holes near the edge, which operate in wide band. The metamaterial lens serves as a convertor which transforms the spherical beams emitted from feed into conical beams. The conical beams form quasi-Bessel beams in the near-field region. The aperture diameter of the GRIN lens is much larger than the operating wavelength to guarantee the transformation. In principle, this kind of metamaterial lens can produce Bessel beams at arbitrary distance by designing the refractive-index distribution. To verify the approach, we have designed, fabricated and tested a metamaterial lens. Full-wave simulation and experiment results have proved that the generated Bessel beams can be maintained in distance larger than 1 meter within a ranging from 12 GHz to 18 GHz.
登录
查看更多内容
影响因子：
5.7
作者：
Imani, Mohammadreza F.;Grbic, Anthony
通讯作者：
Grbic, Anthony
影响因子：
8.6
作者：
Li, Zhaofeng;Alici, Kamil Boratay;Ozbay, Ekmel
通讯作者：
Ozbay, Ekmel
梯度折射率超材料高性能波束扫描天线实验
影响因子：
4
作者：
Ma, Hui Feng;Chen, Xi;Cui, Tie Jun
通讯作者：
Cui, Tie Jun
影响因子：
8.6
作者：
Mugnai, D;Ranfagni, A;Ruggeri, R
通讯作者：
Ruggeri, R
影响因子：
1.1
作者：
Salo, J;Meltaus, J;Räisänen, AV
通讯作者：
Räisänen, AV