\documentclass[a4paper]{article}

\usepackage{pgfplots}

\usepgfplotslibrary{smithchart}

\begin{document}
\begin{tikzpicture}
%\tracingcommands=2\tracingmacros=2
	\begin{axis}[colormap/jet]
	\addplot[contour prepared={labels=false},contour prepared format=matlab,is smithchart cs] table
	{
	0 3
	0 0
	1 0
	0.5 0.5
	0 3
	0 2
	1 2
	0.5 2.5
	};
	\end{axis}
\end{tikzpicture}

\begin{tikzpicture}
	\begin{axis}[axis type=smithchart,colormap/jet]
	\addplot[contour prepared={labels=false},contour prepared format=matlab,is smithchart cs] file {pae.dat};
	\end{axis}
\end{tikzpicture}

%--------------------------------------------------
%UNSUPPORTED:
% \begin{tikzpicture}
% 	\begin{axis}[axis type=smithchart,colormap/jet]
% 	\addplot[contour prepared filled={labels=false},contour prepared format=matlab,is smithchart cs] file {pae.dat};
% 	\end{axis}
% \end{tikzpicture}
%-------------------------------------------------- 
\end{document}

