Function: octave_smith_admitance ( re(y_L), im(y_L), re(y_a), im(y_a) )
Y_L / Y_0 = 0.2 - 0.5j Y_a / Y_0 = 0.3 + 1.5j Y_0: Characteristic Admitance
gamma0 = ( 1/Y_L - 1/Y_0 ) / ( 1/Y_L + 1/Y_0 ) = ( 1 - y_L ) / ( 1 + y_L ) gamma1 = ( 1/Y - 1/Y_0 ) / ( 1/Y + 1/Y_0 ) = ( 1 - y ) / ( 1 + y )
