\begin{tikzpicture}[>=stealth', auto, node distance=2cm, scale=1.2, thick]

    \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]

        \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[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) +(0,0.035) -- +(0, -0.035) node[inner sep=0, anchor=north] {\small $K_1$};
        \draw[gray] ( 5,0) +(0,0.035) -- +(0, -0.035) 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 $N=3$};



            \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}