% Author: Prof. Dr. Matthias Jung, DL9MJ
% Year: 2023
\begin{circuitikz}
    \draw (0,0) 
        node [qgeneratorshape, t={G}, anchor=east](generator){};
    \draw(generator.east)
        to [short] ++(0.5,0) node[inputarrow] {}
        node [twoportsplitshape,t1=f,t2={2\,f}, anchor=west](f1){};
    \draw(f1.east)
        to [short] ++(0.5,0) node[inputarrow] {}
        node [twoportsplitshape,t1=f,t2={3\,f}, anchor=west](f2){};
    \draw(f2.east)
        to [short] ++(0.5,0) node[inputarrow] {}
        node [twoportsplitshape,t1=f,t2={2\,f}, anchor=west](f3){};
    \draw(f3.east)
        to [short] ++(0.5,0) node[inputarrow] {}
        node [ampshape, box, label=PA, anchor=west]{};
\end{circuitikz}