Near-Field Phase-Scanning Self-Accelerating Airy-Bessel Beam for Nonline-of-Sight Wireless Communication

This article proposes a novel approach for generating near-field phase-scanning self-accelerating beams based on the Airy-Bessel fusion method for nonline-of-sight (NLOS) wireless communication. Unlike conventional Airy beams, which require both amplitude and phase control for beam scanning, the proposed method introduces a phase-scanning principle into the near-field Airy beam. The Bessel beam is employed to further enhance scanning performance through the Airy-Bessel fusion method, utilizing an analytical approach based on the Fourier transform and the Nyquist sampling theorem. To validate this approach, a traveling-wave waveguide slot antenna array with a five-port, three-layer pillbox structure was designed and fabricated. Beam scanning in two directions is achieved by modulating the operating frequency and input ports to generate the required phase shifts. Experimental results show good agreement with simulation results in terms of phase-scanning performance for the self-accelerating Airy-Bessel beam. Furthermore, NLOS wireless communication experiments verify the self-acceleration and self-healing properties of the proposed phase-scanning beam, highlighting the significant potential of the Airy-Bessel beam for near-field applications in anti-occlusion communication, imaging, and wireless energy transmission.