本文基于等效电路模型理论,提出了一种基于小单元电磁谐振集成的左手介质结构设计方案。该方案采用四个矩形多开口金属结构对称排列在介质基底单侧,构成一个左手介质单元。利用HFSS软件提取一系列有效电磁参数。结果表明,等效介电常数...本文基于等效电路模型理论,提出了一种基于小单元电磁谐振集成的左手介质结构设计方案。该方案采用四个矩形多开口金属结构对称排列在介质基底单侧,构成一个左手介质单元。利用HFSS软件提取一系列有效电磁参数。结果表明,等效介电常数和等效磁导率在11.09~22GHz范围内均为负,绝对带宽可达10.91 GHz,全覆盖Ku波段,单元损耗低于0.1 d B,实现了小单元及宽频低损的特性。对该结构进行加工、制作并通过波导测试进行验证,从而证实了该结构左手特性的正确性。展开更多
We propose a cylindrical conformal transmitted metasurface for orbital angular momentum vortex wave generation.Formulas for calculating the phase distributions of cylindrical conformal transmitted metasurface is prese...We propose a cylindrical conformal transmitted metasurface for orbital angular momentum vortex wave generation.Formulas for calculating the phase distributions of cylindrical conformal transmitted metasurface is presented.A prototype of the proposed conformal transmitted metasurface is designed,fabricated and measured.Measured results shows that the proposed conformal transmitted metasurface can effectively generate vortex waves,which verifies the effectiveness of our method.The proposed method may pave the way of vortex wave generation with cylindrical conformal devices.展开更多
文摘本文基于等效电路模型理论,提出了一种基于小单元电磁谐振集成的左手介质结构设计方案。该方案采用四个矩形多开口金属结构对称排列在介质基底单侧,构成一个左手介质单元。利用HFSS软件提取一系列有效电磁参数。结果表明,等效介电常数和等效磁导率在11.09~22GHz范围内均为负,绝对带宽可达10.91 GHz,全覆盖Ku波段,单元损耗低于0.1 d B,实现了小单元及宽频低损的特性。对该结构进行加工、制作并通过波导测试进行验证,从而证实了该结构左手特性的正确性。
基金supported by the National Natural Science Foundation of China(Grant No.61961006)the Science Technology Foundation of Guizhou Province,China(Grant No.QKHJC[2020]1Y257)。
文摘We propose a cylindrical conformal transmitted metasurface for orbital angular momentum vortex wave generation.Formulas for calculating the phase distributions of cylindrical conformal transmitted metasurface is presented.A prototype of the proposed conformal transmitted metasurface is designed,fabricated and measured.Measured results shows that the proposed conformal transmitted metasurface can effectively generate vortex waves,which verifies the effectiveness of our method.The proposed method may pave the way of vortex wave generation with cylindrical conformal devices.