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\section{Polarisation}  \subsection{Lineare Polarisartion}  $\Re{(\underline{\vec{E}}_0)}\times\Im{(\underline{\vec{E}}_0)}=\vec{0}$ \begin{equation}  \Re{(\underline{\vec{E}}_0)}\times\Im{(\underline{\vec{E}}_0)}=\vec{0}  \end{equation}  \subsection{Zirkular polarisierte TEM Welle}  $|\Re{(\underline{\vec{E}}_0)}|=|\Im{(\underline{\vec{E}}_0)}|\quad\land\quad \Re{(\underline{\vec{E}}_0)}\perp\Im{(\underline{\vec{E}}_0)}$ \begin{equation}  |\Re{(\underline{\vec{E}}_0)}|=|\Im{(\underline{\vec{E}}_0)}|\quad\land\quad \Re{(\underline{\vec{E}}_0)}\perp\Im{(\underline{\vec{E}}_0)}  \end{equation}  \subsection{Elliptisch polarisierte Welle}  $\rightarrow$ sonst (Normalfall)