Fig. 6

a Logarithmic plots of \({Z}_{xx}^{\mathrm{inf}}\), \({Z}_{yy}^{\mathrm{inf}}\), \({Z}_{xy}^{\mathrm{inf}}\), and \({Z}_{yx}^{\mathrm{inf}}\) and b \({T}_{x}^{\mathrm{edge}}\), and \({T}_{y}^{\mathrm{edge}}\) with \({\mathbf{R}}_{x}^{T}(\theta ){\widehat{{\varvec{\rho}}}}_{{\varvec{y}}}{\mathbf{R}}_{x}(\theta )\), and \({\widehat{{\varvec{\rho}}}}_{{\varvec{y}}}=\left[\begin{array}{ccc}50& 0& 0\\ 0& 500 & 0\\ 0& 0& 50\end{array}\right]\), when \(\theta =20^\circ , 45^\circ , 70^\circ\) shown on x-axis. Similarly, c and d are for \({\mathbf{R}}_{x}^{T}(45^\circ ){\widehat{{\varvec{\rho}}}}_{{\varvec{y}}}{\mathbf{R}}_{x}(45^\circ )\), when \({\widehat{{\varvec{\rho}}}}_{{\varvec{y}}}=\left[\begin{array}{ccc}50& 0& 0\\ 0& {\rho }_{y} & 0\\ 0& 0& 50\end{array}\right]\) with \({\rho }_{y}\) equaling 0.5, 5, 500, and 5000 Ω-m shown on the x-axis