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50ohm-contents-dl/contents/drawings/732.tex
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% Author: Prof. Dr. Matthias Jung, DL9MJ
% Year: 2023
\begin{circuitikz}[european]
\draw [fill=DARCblue,domain=45:135] plot ({3*0.9*cos(\x)}, {3*0.9*sin(\x)}) coordinate(c1);
\path [domain=135:45] plot ({3*0.9*cos(\x)}, {3*0.9*sin(\x)}) coordinate(c0);
\path [domain=45:90] plot ({3*0.9*cos(\x)}, {3*0.9*sin(\x)}) coordinate(c2);
%
\draw [DARCred!50, line width=20, domain=45:135] plot ({3*1.58*cos(\x)}, {3*1.58*sin(\x)});
\path [domain=45:67.5] plot ({3*1.58*cos(\x)}, {3*1.58*sin(\x)}) coordinate(c3);
\path [domain=45:112.5] plot ({3*1.58*cos(\x)}, {3*1.58*sin(\x)}) coordinate(c4);
%
\draw (c1) node [dinantenna, scale={\getDarcImageFactor*0.5}, rotate=+45](tx){};
\draw (c0) node [dinantenna, scale={\getDarcImageFactor*0.5}, rotate=-45](rx){};
%
\draw[DARCred, ultra thick] (tx.right) {[rounded corners]
-- (c4)}
-- (c2){[rounded corners]
-- (c3)
-- (rx.left)};
%
\draw[DARCgreen, ultra thick] (tx.right) -- ++(0.5,0.5) coordinate(end);
%
\draw(tx.left) node[below left]() {Sender};
\draw(rx.right) node[below right]() {Empfänger};
%
\draw(c4) to [open, name={h1}] (c2);
\draw[DARCred](h1.center) node[above, rotate=-44](){\small~~~Raumwelle};
%
\draw[DARCgreen](end) node[above](){\footnotesize\quad\quad~~Bodenwelle};
%
\end{circuitikz}