In order to apply the RFFM method, the deformed integration path (DIP) is defined in Fig.
Thus, (16) and (20) are not valid in the proposed RFFM method, and (22) can not be applied for obtaining the spatial domain MPGFs.
(24) The proposed RFFM method is applied on the DIP shown in Fig.
It is noted that the proposed RFFM method is quite successful and coincides perfectly with the results of the numerical integration, while the three-level method fails in fitting the far field.
For the sake of comparison, the parameters used in the proposed RFFM method for the structure of Fig.
The RFFM method is applied for the approximation of spectral-domain MPGFs after the quasistatic-wave parts are extracted.