On the Data Rate Capability of Near-Field Communications Links based on Bessel Beams

This work proposes the numerical analysis of near-field communications using non-diffractive Bessel beams, in terms of Bit Error Rates when communicating with QAM-256 modulation. The study calculates BER for different locations within the near-field volume and non-diffractive range of the generated non-diffractive beam within the near-field of the radiating aperture. It is demonstrated that, unlike the far-field analysis, the BER in the near-field can significantly vary, even when calculated at the same distance from the radiating aperture. The study also predicts that a communication link with BER < 10
^-4
can be achieved – under certain conditions – over a distance up to 4 λ.