AI 中文总结
研究收缩天线系统，从PA几何角度出发，基于物理耦合原理将定向增益纳入信道模型，通过全波仿真和60GHz原型视频传输实验，展示不同PA几何形状和方向对场分布及辐射方向图的影响，凸显几何感知定向PASS的应用前景。
AI 中文摘要
收缩天线系统（PASS）作为一种灵活架构，通过介质波导和可重构辐射点创建“最后一米”视距无线链路，近来备受关注。虽将收缩天线（PA）建模为各向同性点辐射器便于分析并展示了PASS的性能提升，但其实际辐射特性仍未充分探索。本文从PA几何角度研究PASS。从物理耦合原理出发，解释PA形状为何影响感应极化电流并将定向增益纳入信道模型。通过全波仿真展示不同PA几何形状和方向如何重塑内部场分布和远场辐射方向图。还进行了60GHz原型视频传输实验以证明改变PA状态对链路级的影响。最后强调了几何感知定向PASS带来的有前景的应用。
英文摘要
Pinching-antenna systems (PASS) have recently attracted growing interest as a flexible architecture for creating "last-meter" line-of-sight wireless links through dielectric waveguides and reconfigurable radiation points. While modeling pinching antennas (PAs) as isotropic point radiators has enabled tractable analyses and demonstrated the performance gains of PASS, their practical radiation characteristics remain underexplored. This article investigates PASS from the perspective of PA geometry. Starting from the physical coupling principle, we explain why PA shape affects the induced polarization current and incorporate directional gain into the channel model. The full-wave simulations are conducted to show how different PA geometries and orientations reshape the internal field distribution and far-field radiation pattern. A 60 GHz prototype video transmission experiment is further presented to demonstrate the link-level impact of changing PA states. Finally, promising applications enabled by geometry-aware directional PASS are highlighted.
