面向应急通信的3.5 GHz超表面反射阵天线设计
A 3.5 GHz Metasurface Reflectarray Antenna for Emergency Communications
摘要: 针对应急通信场景中天线前端对定向增益、覆盖稳定性及结构低复杂度的需求，本文提出了一种工作于3.5 GHz的喇叭馈电超表面反射阵天线。设计了一种双层对称回纹十字超表面单元，通过调节单元几何参数实现超过360˚的反射相位覆盖，并在目标频点保持较高的反射幅度。基于馈源近场相位分布，采用非周期相位补偿方法构建18 × 18单元反射阵，实现球面波向准平面波的转换。仿真结果表明，该天线在3.5 GHz处获得19.8 dBi峰值增益，φ = 0˚和φ = 90˚两个主切面上的3 dB波束宽度分别为10.3˚和12.5˚，对应的旁瓣电平均为−12.6 dB。验证了该结构在Sub-6 GHz应急通信定向覆盖中的应用潜力。
Abstract: To meet the requirements of directional gain, coverage stability, and low structural complexity for antenna front ends in emergency communication scenarios, this paper proposes a horn-fed metasurface reflectarray antenna operating at 3.5 GHz. A dual-layer symmetric meandered-cross metasurface element is designed, where a reflection phase coverage exceeding 360˚ is achieved by adjusting the geometric parameters of the unit cell while maintaining a high reflection amplitude at the target frequency. Based on the near-field phase distribution of the feed source, an 18 × 18-element reflectarray is constructed using a non-periodic phase compensation method to realize the transformation from spherical waves to quasi-plane waves. Simulation results demonstrate that the proposed antenna achieves a peak gain of 19.8 dBi at 3.5 GHz. The 3-dB beamwidths in the two principal planes of φ = 0˚ and φ = 90˚ are 10.3˚ and 12.5˚, respectively, while the sidelobe levels in both principal planes are maintained at −12.6 dB. The results demonstrate the potential of the proposed structure for directional coverage in Sub-6 GHz emergency communication applications.
文章引用：虞旺红, 王玉, 张雷, 尚玉龙, 曾雯. 面向应急通信的3.5 GHz超表面反射阵天线设计[J]. 无线通信, 2026, 16(5): 67-81. https://doi.org/10.12677/hjwc.2026.165007

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