% Author: Dr. Henning Paul, DO9PHB
% Year: 2022
\begin{tikzpicture}
    \begin{axis}[%
        /pgf/number format/1000 sep={ },
        /pgf/number format/use comma,        
        axis lines=middle,
        axis line style={-Triangle},
        ytick style={draw=none},
		ymajorgrids=false,
		yticklabel=\empty,
        grid style={line width=.1pt, draw=gray!10},
        major grid style={line width=.2pt,draw=gray!50},
        xticklabels={$0$, $\frac{1}{2} f_\mathrm{A}$, $f_\mathrm{A}$, $\frac{3}{2} f_\mathrm{A}$},
		xtick={0,1,2,3},
        xmin=-0.1,
        xmax=3.5,
        ymin=-0.3,
        ymax=1.2,
        xmajorgrids=false,
        xlabel style={at={(ticklabel* cs:1)},anchor=north east},
        ylabel style={at={(ticklabel* cs:1)},anchor=north east},
		xlabel=$f$,
		ylabel=$A$,
        width=\linewidth*\getDarcImageFactor,
        height=4cm,
        scale only axis,
    ]
	\addplot[samples=11,domain=0:0.1,smooth] {1.0}; 
	\addplot[samples=81,domain=0.10:0.90,smooth] {1.0}; 
	\addplot[samples=11,domain=0.9:1.0,smooth] {0.5-0.5*cos(deg(x)*10*pi)}; 
	\addplot[samples=200,domain=1.0:3.0,smooth] {0.0}; 
	\node[align=center] at (axis cs: 0.5,0.5) {\footnotesize Passband};
	\node at (axis cs: 2,0.2) {\footnotesize Spärrband};
\end{axis}
\end{tikzpicture}