The paper addresses the challenge of maintaining millimeter-wave and terahertz (THz) wireless links in the presence of obstacles, which can disrupt communication and reduce service quality. The authors propose a solution that leverages the near-field properties of THz waves, where users are typically located within the electromagnetic near field of the base station. They demonstrate that curved beams, carrying high-bit-rate data, can maintain a link by curving around intervening obstacles. The study includes a model to analyze and experimentally evaluate the bandwidth limitations imposed by self-accelerating beams, showing that such links utilize the full aperture of the transmitter, even when there is no direct line of sight to the receiver. This approach, suitable for THz frequencies, opens new possibilities for wavefront management in directional wireless networks. The authors also explore the trajectory engineering of caustic beams and Airy beams, and provide experimental verification of their performance in obstacle avoidance scenarios. The results highlight the superior performance of caustic beams over conventional beam steering methods in terms of received power and bit error rate (BER). The study concludes by discussing the potential of near-field wavefront engineering in future physical layer implementations, emphasizing the need for further research to fully realize the benefits of this approach.The paper addresses the challenge of maintaining millimeter-wave and terahertz (THz) wireless links in the presence of obstacles, which can disrupt communication and reduce service quality. The authors propose a solution that leverages the near-field properties of THz waves, where users are typically located within the electromagnetic near field of the base station. They demonstrate that curved beams, carrying high-bit-rate data, can maintain a link by curving around intervening obstacles. The study includes a model to analyze and experimentally evaluate the bandwidth limitations imposed by self-accelerating beams, showing that such links utilize the full aperture of the transmitter, even when there is no direct line of sight to the receiver. This approach, suitable for THz frequencies, opens new possibilities for wavefront management in directional wireless networks. The authors also explore the trajectory engineering of caustic beams and Airy beams, and provide experimental verification of their performance in obstacle avoidance scenarios. The results highlight the superior performance of caustic beams over conventional beam steering methods in terms of received power and bit error rate (BER). The study concludes by discussing the potential of near-field wavefront engineering in future physical layer implementations, emphasizing the need for further research to fully realize the benefits of this approach.