自由空间电磁传播中的超光速、亚光速和负速度
Superluminal, subluminal, and negative velocities in free-space electromagnetic propagation
摘要：
本章对自由空间中空间紧凑源产生的电磁场脉冲的速度进行了时域分析。最近的模拟和测量异常超光速，亚光速和负速度进行了讨论。结果表明，这样的速度是本地和瞬时的性质，并不违反因果关系或狭义相对论。虽然这些效应主要局限于近场和中场区，但其中一些似乎自相矛盾，仍然缺乏足够的物理解释。
英文摘要：
In this Chapter the time-domain analysis of the velocity of the electromagnetic field pulses generated by a spatially compact source in free space is presented. Recent simulations and measurements of anomalous superluminal, subluminal, and negative velocities are discussed. It is shown that such velocities are local and instantaneous in nature and do not violate either causality or special relativity. Although these effects are mainly confined to the near- and intermediate-field zones, some of them seem paradoxical and still lack adequate physical interpretation.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
