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Author

Zai-Chen Zhang

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Preprint Aug 2026

Sparse Port Selection under Mutual Coupling in Fluid Antenna Arrays

Fluid antenna systems obtain spatial degrees of freedom by reconfiguring antenna positions within a confined region, a principle that extends to beamforming: shaped beams can be synthesized using far fewer radio-frequency feeds than candidate antenna positions. When the candidates are densely arranged, however, electro...

Jing-Yuan Xu, Hao-Yu Liang, Zai-Chen Zhang et al. · 0 citations
Preprint Aug 2026

Impedance-Aware Zonal Port Activation for Fluid Antenna Arrays

Fluid antenna array (FAA) activation jointly determines the effective multi-user channel for precoding and the sparse physical aperture. Channel-oriented selection can concentrate high-gain ports and erode aperture quality, whereas geometry-oriented selection does not adapt to instantaneous channel state information (C...

Yuan-Hui Wu, Hao Jiang, Zai-Chen Zhang · 0 citations

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