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\begin{tikzpicture}[>=stealth', auto, node distance=2cm, scale=1.2]
\tikzstyle{zero} = [draw, circle, inner sep =0, minimum height=0.15cm]
\tikzstyle{dot} = [fill, circle, inner sep =0, minimum height=0.1cm]
\tikzset{pole/.style={cross out, draw=black, minimum size=(0.15cm-\pgflinewidth), inner sep=0pt, outer sep=0pt}}
\begin{scope}[xscale=1.25, yscale=3.5]
\draw[gray, ->] (0,-0.55) -- (0,1.05) node[anchor=south]{$\mathrm{Im}~z_1$};
\draw[gray, ->] (-1.5,0) -- (6,0) node[anchor=west]{$\mathrm{Re}~z_1$};
\draw[gray] ( 1,0) +(0,0.05) -- +(0, -0.05) node[inner sep=0, anchor=north] {\small $K_1$};
\draw[gray] ( 5,0) +(0,0.05) -- +(0, -0.05) node[inner sep=0, anchor=north] {\small $5K_1$};
\draw[gray] (0, 0.5) +(0.1, 0) -- +(-0.1, 0) node[inner sep=0, anchor=east]{\small $jK^\prime_1$};
\begin{scope}
\clip(-1.5,-0.75) rectangle (6.8,1.25);
% \draw[>->, line width=0.05, thick, blue] (1, 0.45) -- (2, 0.45) -- (2, 0.05) -- ( 0.1, 0.05) -- ( 0.1,0.45) -- (1, 0.45);
% \draw[>->, line width=0.05, thick, orange] (2, 0.5 ) -- (4, 0.5 ) -- (4, 0 ) -- ( 0 , 0 ) -- ( 0 ,0.5 ) -- (2, 0.5 );
% \draw[>->, line width=0.05, thick, red] (3, 0.55) -- (6, 0.55) -- (6,-0.05) -- (-0.1,-0.05) -- (-0.1,0.55) -- (3, 0.55);
% \node[blue] at (1, 0.25) {$N=1$};
% \node[orange] at (3, 0.25) {$N=2$};
% \node[red] at (5, 0.25) {$N=3$};
% \draw[line width=0.1cm, fill, red!50] (0,0) rectangle (3, 0.5);
% \draw[line width=0.05cm, fill, orange!50] (0,0) rectangle (2, 0.5);
% \fill[yellow!50] (0,0) rectangle (1, 0.5);
% \node[] at (0.5, 0.25) {\small $N=1$};
% \node[] at (1.5, 0.25) {\small $N=2$};
% \node[] at (2.5, 0.25) {\small $N=3$};
\fill[orange!30] (0,0) rectangle (5, 0.5);
% \fill[yellow!30] (0,0) rectangle (1, 0.1);
\node[] at (2.5, 0.25) {\small $N=5$};
\draw[decorate,decoration={brace,amplitude=3pt,mirror}, yshift=0.05cm]
(5,0.5) node(t_k_unten){} -- node[above, yshift=0.1cm]{$NK_1$}
(0,0.5) node(t_k_opt_unten){};
\draw[decorate,decoration={brace,amplitude=3pt,mirror}, xshift=0.1cm]
(5,0) node(t_k_unten){} -- node[right, xshift=0.1cm]{$K^\prime \frac{K_1N}{K} = K^\prime_1$}
(5,0.5) node(t_k_opt_unten){};
\draw[ultra thick, ->, darkgreen] (5, 0) -- node[yshift=-0.5cm]{Durchlassbereich} (0,0);
\draw[ultra thick, ->, orange] (-0, 0) -- node[align=center]{Übergangs-\\berech} (0,0.5);
\draw[ultra thick, ->, red] (0,0.5) -- node[align=center, yshift=0.7cm]{Sperrbereich} (5, 0.5);
\draw (4,0 ) node[dot]{} node[anchor=south] {\small $1$};
\draw (2,0 ) node[dot]{} node[anchor=south] {\small $-1$};
\draw (0,0 ) node[dot]{} node[anchor=south west] {\small $1$};
\draw (0,0.5) node[dot]{} node[anchor=north west] {\small $1/k$};
\draw (2,0.5) node[dot]{} node[anchor=north] {\small $-1/k$};
\draw (4,0.5) node[dot]{} node[anchor=north] {\small $1/k$};
\foreach \i in {-2,...,1} {
\foreach \j in {-2,...,1} {
\begin{scope}[xshift=\i*4cm, yshift=\j*1cm]
\node[zero] at ( 1, 0) {};
\node[zero] at ( 3, 0) {};
\node[pole] at ( 1,0.5) {};
\node[pole] at ( 3,0.5) {};
\end{scope}
}
}
\end{scope}
\end{scope}
\begin{scope}[xshift=1cm , yshift=-3cm, xscale=0.75]
\draw[gray, ->] (-1,0) -- (6,0) node[anchor=west]{$w$};
\draw[ultra thick, ->, darkgreen] (0, 0) -- (2, 0);
\draw[ultra thick, ->, orange] (2, 0) -- (3, 0);
\draw[ultra thick, ->, red] (3, 0) -- (5, 0);
\node[anchor=south] at (0,0) {$0$};
\node[anchor=south] at (2,0) {$1$};
\node[anchor=south] at (3,0) {$1/k$};
\node[anchor=south] at (5,0) {$\infty$};
\end{scope}
\end{tikzpicture}
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