This case is in principle very close to that of a (P)SAW on a metallized surface. But there are in practice two main differences:
- No coupling strength can be defined (how to excite electrically a surface wave under a perfectly conducting layer?).
- The slowness is really strongly affected by the thickness (specified by the fh product). This is of course the well-known mass-loading effect, but as a practical consequence it is difficult to select a starting slowness. SlownessBuddy has a built-in search range of 0.2 10-4 s/m If the algorithm does not converge, please consider a larger initial slowness value.