% Author: Prof. Dr. Matthias Jung, DL9MJ
% Year: 2024

\begin{circuitikz}[european]
    \def\base{2.0}

    \draw[ultra thick](1*\base,0.0)   -- ++ (0,3.0) coordinate(h1);
    \draw[ultra thick, DARCorange](2*\base,0.0) -- ++ (0,2.0) coordinate(h2);
    \draw[ultra thick, DARCorange](3*\base,0.0) -- ++ (0,1.5) coordinate(h3);
    \draw[ultra thick, DARCorange](4*\base,0.0) -- ++ (0,1.0) coordinate(h4);
    \draw[dotted, gray] (h1) -- (1*\base,3.5) coordinate(hh1);
    \draw[dotted, gray] (h2) -- (2*\base,3.5) coordinate(hh2);
    \draw[dotted, gray] (h3) -- (3*\base,3.5) coordinate(hh3) node[midway](caption){};
    \draw[dotted, gray] (h4) -- (4*\base,3.5) coordinate(hh4);

    \draw[DARCorange](caption) node[](){Oberwellen (OW)};

    \draw[gray, Triangle-Triangle] (hh1) -- (hh2) node[midway, above](){$f_{0}$};
    \draw[gray, Triangle-Triangle] (hh2) -- (hh3) node[midway, above](){$f_{0}$};
    \draw[gray, Triangle-Triangle] (hh3) -- (hh4) node[midway, above](){$f_{0}$};

    \draw(5.25,0.0) ;
    \draw(1*\base,0) node[align=center, anchor=north] () {$f_\text{0}$\\1 Harm.};
    \draw(2*\base,0) node[align=center, anchor=north] () {1. OW\\2 Harm.};
    \draw(3*\base,0) node[align=center, anchor=north] () {2. OW\\3 Harm.};
    \draw(4*\base,0) node[align=center, anchor=north] () {3. OW\\4 Harm.};

	\draw[-Triangle](0.0,0.0) -- (9.0,0.0) node[anchor=west] () {$f$};
	\draw[-Triangle](0.0,0.0) -- (0.0,4.0) node[anchor=south] () {$A$};

\end{circuitikz}