% Author: Malte Schmitz, DE7LMS
% Year: 2021
\begin{tikzpicture}
  \filldraw[ultra thick, fill=black!25, rounded corners=\getDarcImageFactor*4mm]
    (0,0) -- (1.5,0) -- (2.3,1.1) -- (4.7,1.1) -- (5.5,0) -- (7,0)
          -- (5.5,0) -- (4.7,-1.1) -- (2.3,-1.1) -- (1.5,0) -- cycle;
\end{tikzpicture}