Liu, Baiyang;
Wu, Tuo;
Wong, Kai-Kit;
Wong, Hang;
Tong, Kin-Fai;
(2025)
Wideband Pixel-Based Fluid Antenna System: An Antenna Design for Smart City.
IEEE Internet of Things Journal
10.1109/jiot.2025.3637319.
(In press).
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Abstract
Smart cities demand versatile antenna systems supporting heterogeneous wireless applications across diverse propagation environments. This paper presents a wideband pixel-based fluid antenna system (PB-FAS) designed as a general-purpose antenna solution for smart city infrastructures, addressing fundamental challenges in wideband operation, spatial adaptability, interference mitigation, and scalable deployment. The proposed PB-FAS integrates parasitic elements for enhanced bandwidth (6.0-7.0 GHz) and a compact 6-PIN-diode pixel surface enabling 64 distinct fluid states, achieving optimal cost-performance balance. An integrated FPGA-based control system provides microsecond-level reconfiguration for real-Time channel adaptation. We establish a rigorous exact spatial geometry (ESG) channel model capturing state-dependent antenna responses across near-field and far-field regions, providing a unified theoretical foundation for interference mitigation analysis. Comprehensive validation through full-wave electromagnetic simulations, anechoic chamber measurements, and experimental two-source 16-QAM communication tests demonstrates up to 11 dB SINR improvement and 13.2% EVM reduction through hardware-level spatial diversity, confirming the system's effectiveness as a scalable, cost-effective solution for next-generation smart city wireless infrastructures ranging from IoT sensor networks to high-capacity backhaul links.
| Type: | Article |
|---|---|
| Title: | Wideband Pixel-Based Fluid Antenna System: An Antenna Design for Smart City |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1109/jiot.2025.3637319 |
| Publisher version: | https://doi.org/10.1109/jiot.2025.3637319 |
| Language: | English |
| Additional information: | This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions. |
| Keywords: | Interference, Fluids, Smart cities, Antennas, Wideband, Broadband antennas, Switches, Spatial diversity, Prevention and mitigation, Internet of Things |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Electronic and Electrical Eng |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10218868 |
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