The paper "On the Impact of Reactive Region on the Near-Field Channel Gain" by Chongjun Ouyang, Zhaolin Wang, Boqun Zhao, Xingqi Zhang, and Yuanwei Liu analyzes the near-field channel gain of spatially-discrete (SPD) and continuous-aperture (CAP) arrays, considering both radiating and reactive components of the electromagnetic (EM) field. The authors derive new expressions for the channel gains, which are more accurate than conventional results that neglect the reactive region. Through asymptotic analyses in the large aperture size limit, they show that the impact of the reactive region on the near-field channel gain is negligible, even as the array aperture size approaches infinity. Numerical simulations validate these findings, demonstrating that the channel gain with the reactive region considered is lower than without it, but the degradation is negligible. The study highlights the importance of considering the reactive region in near-field analyses for practical applications.The paper "On the Impact of Reactive Region on the Near-Field Channel Gain" by Chongjun Ouyang, Zhaolin Wang, Boqun Zhao, Xingqi Zhang, and Yuanwei Liu analyzes the near-field channel gain of spatially-discrete (SPD) and continuous-aperture (CAP) arrays, considering both radiating and reactive components of the electromagnetic (EM) field. The authors derive new expressions for the channel gains, which are more accurate than conventional results that neglect the reactive region. Through asymptotic analyses in the large aperture size limit, they show that the impact of the reactive region on the near-field channel gain is negligible, even as the array aperture size approaches infinity. Numerical simulations validate these findings, demonstrating that the channel gain with the reactive region considered is lower than without it, but the degradation is negligible. The study highlights the importance of considering the reactive region in near-field analyses for practical applications.