Evanescent Fields inside a Cut-off Waveguide as Near Fields

Zhi-Yong Wang, Jun Gou, Shuangjin Shi, Qi Qiu
2013 Optics and Photonics Journal  
Usually, electromagnetic evanescent waves are some kinds of near fields. However, it looks as if the evanescent waves inside a cut-off waveguide had nothing to do with any near field. In this paper, we will show that the evanescent waves inside a cut-off waveguide can also be regarded as the near fields of an aerial array.
doi:10.4236/opj.2013.32b046 fatcat:sl3hjenlwfbwpg4bjxlepvgmoq