石墨烯可重构透射阵列天线与反射器在太赫兹宽角度波束调控中的性能比较
Comparative Performance of Graphene-Enabled Transmitarray Antenna and Reflectors for Wide-Angle Terahertz Beam Steering
- University of California San Diego（加利福尼亚大学圣地亚哥分校）
- San Diego State University（圣地亚哥州立大学）
机构由 AI 辅助整理，请以论文原文为准。
AI总结：
本文比较半球形石墨烯透射阵列与平面反射器在太赫兹宽角度波束调控中的性能，透射阵列仰角范围达±78°且波束更稳定，优于平面反射器。
AI中文摘要：
本研究比较了半球形石墨烯透射阵列天线与其平面反射器对应物在太赫兹频段宽角度波束调控中的性能。首先建立了平面反射器的理论框架并进行了数值评估，其仰角波束调控范围为±60°。相比之下，透射阵列将仰角调控范围扩展至±78°，同时保持完整的360°方位角覆盖。平面反射器表现出更大的半功率波束宽度（HPBW）变化，为26.48°，而透射阵列仅为13.1°，导致反射波束分布更宽，方向性功率密度、方向性和增益降低。与此同时，透射阵列在宽调控范围内保持了更稳定和可控的波束宽度响应，并具有更强的方向性功率集中能力。通过与文献中报道的平面反射器和天线的实验结果进行比较，验证了透射阵列的性能优势。此外，我们还对透射阵列相对于平面配置在其余指标上的性能优势进行了全面评估。
英文摘要：
This work compares a hemispherical graphene-based transmitarray antenna with its planar reflector counterpart for wide-angle beam steering in the THz regime. The theoretical framework of the planar reflector is formulated and numerically evaluated, yielding an elevation beam-steering range of \pm60°. In contrast, the transmitarray extends the elevation steering range to \pm78° while maintaining full 360° azimuthal coverage. The planar reflector exhibits a larger HPBW variation of 26.48°, compared with 13.1° for the transmitarray, resulting in a broader reflected-beam distribution and reduced directional power density, directivity, and gain. Meanwhile, the transmitarray maintains a more stable and controllable beamwidth response with greater directional power concentration over a wide steering range. The performance advantages of the transmitarray are demonstrated through comparisons with experimental results reported in the literature for planar reflectors and antennas. We further provide a comprehensive assessment of the performance advantages of the transmitarray over planar configurations across the remaining metrics.
