Calculates ‘inverse’ s-parameter matrix, used for de-embeding
This is not literally the inverse of the s-parameter matrix. Instead, it is defined such that the inverse of the s-matrix cascaded with itself is unity.

where  is the matrix inverse. In words, this
is the inverse of the scattering transfer parameters matrix
transformed into a scattering parameters matrix.
 is the matrix inverse. In words, this
is the inverse of the scattering transfer parameters matrix
transformed into a scattering parameters matrix.
| Parameters : | s : numpy.ndarray (shape fx2x2) 
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| Returns : | s’ : numpy.ndarray 
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