AI 中文总结
研究太赫兹频段通信，开发统一传播模型，提出开关馈电收缩天线系统（SF-PASS）架构，该架构在频谱效率上大幅优于单馈PASS，硬件成本低，为宽带太赫兹通信提供新方案。
AI 中文摘要
收缩天线系统（PASS）使用沿低损耗波导的介电粒子作为可重构无源辐射器。现有分析认为在低频和毫米波频段波导内衰减可忽略不计，但我们表明在太赫兹频段不成立，此时可实现的波导损耗大得多。我们开发了一个统一的宽带太赫兹PASS传播模型，整合了波导内衰减、大气吸收、分子再辐射噪声和波束斜视。得出了封闭形式的结果，包括带平均相干因子等。还提出了开关馈电PASS（SF-PASS）架构，数值评估表明SF-PASS在频谱效率上大幅优于单馈PASS，且硬件成本低得多。
英文摘要
The pinching-antenna system (PASS) uses dielectric particles along a low-loss waveguide as reconfigurable passive radiators. Existing analyses conclude that the in-waveguide attenuation is negligible at low frequencies and millimeter wave bands; we show this fails at terahertz (THz), where realizable waveguide losses are dramatically larger. We develop a unified wideband THz-PASS propagation model integrating in-waveguide attenuation, atmospheric absorption, molecular re-radiation noise, and beam squint. Closed-form results follow: a band-averaged coherence factor; a cluster-center placement satisfying a band-edge SINR equalization condition; an associated placement-inversion threshold; and a proposed \emph{Switched-Feed PASS} (SF-PASS) architecture in which a centrally located radio-frequency switch routes the signal among multiple waveguide segments, with a closed-form insertion-loss payoff threshold. Numerical evaluation at the best PASS-compatible THz operating point shows that SF-PASS substantially outperforms single-feed PASS in spectral efficiency and is competitive with a large-scale antenna array at much lower hardware costs.
CommentsIEEE VTC 2026 fall
