3-D Printed Planar Dielectric Linear-to-Circular Polarization Conversion and Beam-Shaping Lenses Using Coding Polarizer
3-D Printed Planar Dielectric Linear-to-Circular Polarization Conversion and Beam-Shaping Lenses Using Coding Polarizer
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DOI：
10.1109/tap.2020.2972625
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发表时间：
2020-02
影响因子：
5.7
通讯作者：
Jianfeng Zhu;Yang Yang-Yang;D. Mcgloin;Ranjith Rajasekharan Unnithan;Shufang Li;S. Liao;Q. Xue
中科院分区：
文献类型：
--
作者：
Jianfeng Zhu;Yang Yang-Yang;D. Mcgloin;Ranjith Rajasekharan Unnithan;Shufang Li;S. Liao;Q. Xue
本文提出了一种新型线圆偏振转换编码单元，并在此基础上提出了两种新型光束整形透镜。首先，在周期性边界条件下，引入线圆偏振转换编码单元，通过调整其几何参数引入必要的相位延迟。相位延迟范围为0°至360°，并被离散化为与特定延迟相对应的3位编码单元。其次，通过适当布置编码单元，提出了高增益圆偏振（CP）镜头。该透镜在透射模式下与平面配置同时实现线圆偏振转换和光束准直，这与将透镜放置在偏振器顶部的同类透镜不同。此外，编码单元用于形成类沃拉斯顿棱镜和类罗雄棱镜平面CP光束整形透镜，将具有不同偏振的光束分成右旋和左旋分量。这些光束可以独立控制。设计、制造和测量了在 30 GHz 频段工作的原型来验证这一想法。
This article presents a new linear-to-circular polarization conversion coding unit, on which two new kinds of beam-shaping lenses are proposed. First, under periodic boundary conditions, a linear-to-circular polarization conversion coding unit is introduced, which introduces the necessary phase delay by adjusting its geometrical parameters. The phase delay ranges from 0° to 360° and is discretized into 3 bit coding units corresponding to specific delays. Second, by properly arranging the coding units, a high-gain circularly polarized (CP) lens is proposed. The lens achieves linear-to-circular polarization conversion and beam collimation in the transmission mode simultaneously with a planar configuration, which is different from counterparts that place a lens atop of a polarizer. Furthermore, the coding units are used to form Wollaston-prism-like and Rochon-prism-like planar CP beam-shaping lenses, which split the beams with different polarizations into right- and left-handed components. These beams can be controlled independently. Prototypes working at 30 GHz band are designed, fabricated, and measured to verify the idea.