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Wideband Oblique-Incident Spherical-Plane Wave Conversion Metalens in K-band

机译：K波段宽带斜入射球面波转换金属化

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摘要

In this paper, a wideband spherical-plane wave conversion metalens (WSPCM) working in the K-band is designed. The WSPCM consists of metamaterial elements with gradient transmission phases, which can transform the oblique-incident spherical wave to the plane wave propagating along the direction from the source to the center of the metalens. Firstly, a five-layer metamaterial element with gradient transmission phase is designed using the Computer Simulation Technology (CST) software. Then, a metamaterial wedge consists of eight metamaterial elements with 30 degree phase gradient (that can deflect the incident plane wave by 30 degree) is designed to verify the phase modulation characteristic of the metamaterial element. Afterwards, a metalens is designed according to the digitized phase distribution of the dielectric lens. Finally, the electric field distribution of the emitted wave at different frequencies and different source locations (i.e., oblique-incident angles) are studied. The design is validated through simulations and measurements.
机译：本文设计了一种在K波段工作的宽带球面波转换金属元（WSPCM）。 WSPCM由具有梯度传输相位的超材料元素组成，这些元素可以将倾斜入射的球面波转换为沿从金属离子源到中心的方向传播的平面波。首先，使用计算机仿真技术（CST）软件设计了具有梯度透射相的五层超材料单元。然后，超材料楔由八个具有30度相位梯度（可以使入射平面波偏转30度）的超材料元素组成，以验证超材料元素的相位调制特性。然后，根据介电透镜的数字化相位分布设计金属元素。最后，研究了在不同频率和不同源位置（即斜入射角）下发射波的电场分布。该设计通过仿真和测量得到验证。

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