Mode-coupling effect between different two types of the surface-wave leaky mode on conductor-backed coplanar strips (CBCPS)

We have recently discovered the new mode-coupling effect between the standard leaky mode and the new leaky mode on CBCPS. Such a mode coupling has not been recognized before in the literature. After investigating the feature of the new leaky mode in detail, we explain why such a coupling effect occurs between different two types of surface-wave leaky mode.