Design of a Scannable Multi-Lens Quasi-Optical System for THz Near-Field Backhaul Communication
H. Zhang (TU Delft - Tera-Hertz Sensing)
Alexandros Bechrakis Bechrakis Triantafyllos (TU Delft - Tera-Hertz Sensing)
Nuria Llombart Llombart (TU Delft - Tera-Hertz Sensing)
Maria Alonso Del Pino (TU Delft - Tera-Hertz Sensing)
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Abstract
Radiative near-field links have gained noticeable interests recently for high-data-rate wireless communication. Unlike far-field links, near-field links can have negligible path loss within hundreds of meters for electrically large antennas at high frequencies. In this work, we propose a multi-lens quasi-optical (QO) system for 100-m near-field backhaul communication at H-band. The QO system is designed with compact size (aspect ratio of 1.3:1) and high coupling efficiency of 82%. Moreover, the rotation of an auxiliary lens realizes beam scanning for the link alignment. The scan range is in the order of 1 m with less than 2 dB scanning coupling loss and scanning magnification of 14.5:1.
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