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arXiv · 2607.24011

Unlocking Directional Radiation in Pinching-Antenna Systems: Geometry-Aware Design and Experimental Verification

Haoyang Li·Weidong Liu·Zhongliang Li·Gaojie Chen·Zheng Yang·Zhiguo Ding
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Abstract

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.

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Haoyang Li, Weidong Liu, Zhongliang Li, Gaojie Chen, Zheng Yang, Zhiguo Ding. 2026-07-27. Unlocking Directional Radiation in Pinching-Antenna Systems: Geometry-Aware Design and Experimental Verification. https://arxiv.org/abs/2607.24011

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