% Author: Dr. Matthias Jung, DL9MJ
% Year: 2021
\begin{circuitikz}
    \draw (0,0) coordinate(start)
        to [TL, name={foo}, bipoles/tline/width=2, o-o] ++(4.0,0) coordinate(end);
    \draw[dashed] (foo.west) -- (foo.east); 

    \draw(start) 
        to [open, name={a}, -o] ++(0,-1)
        -| (foo.bottom left)
        to [short, -*] ++(0,0);

    \draw(end) 
        to [open, name={b}, -o] ++(0,-1)
        -| (foo.bottom right)
        to [short, -*] ++(0,0);

    \draw(a.center) node []{a};
    \draw (b.center) node []{b};
    \draw (foo.south) node [anchor=north]{$Z=\qty{50}{\ohm}$};
\end{circuitikz}