Lens antennas with multibeam, high gain, and low sidelobe level are potential candidates for base station antennas in 5G mobile communication. In this paper, the authors perform simulation and parametric analysis of a lens antenna with positive and negative refractive indexes (NRI) using the modern electromagnetic field simulation software ANSYS HFSS. The simulation results of structures and theoretical calculations are analyzed and compared. The simulation results show the effectiveness of using negative refractive index lens antennas to minimize the dimension. The lens thickness with a negative refractive index decreased from 24.5 mm to 6.1 mm compared to the positive refractive index lens’s thickness. The results also indicate the similarities in gain, sidelobe level, amplitude, and electric field distribution on the aperture plane of the negative and positive refractive indexes (PRI) lens antennas compared to the theoretical calculation. In addition, the authors simulate a lens structure with additional quarter wavelength matching layers (MLs) to estimate the antireflection performance.

中文翻译：

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ANSYS HFSS对正负折射率透镜天线的参数分析

具有多波束，高增益和低旁瓣电平的透镜天线是5G移动通信中基站天线的潜在候选者。在本文中，作者使用现代电磁场仿真软件ANSYS HFSS对具有正折射率和负折射率（NRI）的透镜天线进行了仿真和参数分析。分析并比较了结构的仿真结果和理论计算。仿真结果表明使用负折射率透镜天线最小化尺寸的有效性。与正折射率透镜的厚度相比，负折射率的透镜厚度从24.5 mm减小到6.1 mm。结果还表明增益，旁瓣电平，幅度，与理论计算相比，负折射率和正折射率（PRI）透镜天线孔径平面上的电场分布。此外，作者还模拟了具有额外四分之一波长匹配层（ML）的透镜结构，以估计抗反射性能。