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\def\d{0.2}
\def\n{3}
\def\nn{2}
\def\a{2.5}
\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=3, yscale=3]
\begin{scope}[]
\fill[orange!30, scale=1.735] (0,0) rectangle (\d*\a+0.5, \d/\a+0.5);
\fill[yellow!30] (0,0) rectangle (\d*\a+0.5, \d/\a+0.5);
\begin{scope}[scale=1.735, red]
\draw (0,0) rectangle (\d*\a/\n+0.5/\n, \d/\a+0.5);
\draw[gray] (0,0) -- (\d*\a/\n+0.5/\n, \d/\a+0.5);
\node[zero] at ( \d*\a/\n+0.5/\n, \d/\a+0.5) {};
\node[pole, color=red] at ( \d*\a/\n+0.5/\n, 0) {};
\draw[] ( \d*\a/\n+0.5/\n,0) node[anchor=north] {\small $K_1$};
\draw[] (0, \d/\a+0.5) node[anchor=east]{\small $jK_1^\prime$};
\end{scope}
\begin{scope}[blue]
\draw[] (0,0) rectangle (\d*\a+0.5, \d/\a+0.5);
\foreach \i in {1,...,\nn} {
\draw[gray, dotted] (\i*\d*\a/\n+\i*0.5/\n, 0) -- (\i*\d*\a/\n+\i*0.5/\n, \d/\a+0.5);
}
\node[zero] at ( \d*\a+0.5, \d/\a+0.5) {};
\node[pole, color=blue] at ( \d*\a+0.5, 0) {};
\draw[] ( \d*\a+0.5,0) node[anchor=north] {\small $K$};
\draw[] (0, \d/\a+0.5) node[anchor=east]{\small $jK^\prime$};
\node[dot, gray] at (\d*\a/\n+0.5/\n, \d/\a+0.5) {};
\node[above] at (0.5*\d*\a/\n+0.5*0.5/\n, \d/\a+0.5) {\small $K/N$};
\end{scope}
\draw[thick, gray, ->] (0,-0.25) -- (0,1.25) node[anchor=south]{$\mathrm{Im}$};
\draw[thick, gray, ->] (-0.25,0) -- (2,0) node[anchor=west]{$\mathrm{Re}$};
\begin{scope}[]
\clip(0,0) rectangle (2,1.25);
\draw[scale=1, domain=0.1:10, variable=\x, smooth, samples=200] plot ({\d*\x1+0.5}, {\d/\x+0.5});
\end{scope}
\end{scope}
\end{scope}
\end{tikzpicture}
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