% Author: Prof. Dr. Matthias Jung, DL9MJ
% Year: 2024
\begin{circuitikz}
    \draw(0,0)
        node [antenna](){}
        to [twoportsplit, >, t1=A, t2=D] ++(2,0) coordinate(c1);
    \draw(c1)
        node [inputarrow](){}
        node [twoportshape, circuitikz/bipoles/twoport/width=1.75, anchor=west](c2){};
    \draw(c2.east)
        to [twoportsplit, >, t1=D, t2=A] ++(2,0) coordinate(c1)
        node [inputarrow](){}
        node [loudspeakershape, anchor=south, rotate=-90](){};
    \draw(c2.north)
        node[anchor=north](c4){\footnotesize Digitale Signal-};
    \draw(c2.south)
       node[anchor=south](c5){\footnotesize verarbeitung};
\end{circuitikz}