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Benedikt Rosarius edited 1.7.tex
over 9 years ago
Commit id: 9016370863cc09073c821209d6250b7007e94ddc
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\section{Wellen}
\subsection{Wellengleichungen}
$\Delta\vec{H}-\epsilon \subsection{Wellengleichungen-Helmholtzgleichung}
$$\Delta\vec{H}-\epsilon _0\mu _0 \frac{\partial ^2}{\partial
t^2}\vec{H}=\vec{0}$
$\Delta\vec{E}-\epsilon t^2}\vec{H}=\vec{0}$$
$$\Delta\vec{E}-\epsilon _0\mu _0 \frac{\partial ^2}{\partial
t^2}\vec{E}=\vec{0}$ t^2}\vec{E}=\vec{0}$$
\subsection{Wellengeschwindigkeit}
$c_0=\frac{1}{\sqrt{\epsilon _0\mu _0}}$
\subsection{Welle mit Geschwindigkeit $c$ in Richtung $\vec{n}$}
...
\subsection{Ebene, homogene Wellen}
$rot\vec{E}=-\frac{\partial\vec{B}}{\partial t}\qquad HEZ\quad\rightarrow\quad rot\underline{\vec{E}}=-j \omega\underline{\vec{B}}$
\subsection{Wellenzahl}
$$k=\frac{\omega}{c_0}\qquad\lambda=\frac{2\pi}{k}\qquad\lambda f=\frac{\omega}{k}=c_0\qquad\vec{k}:=k\vec{n}$$
$$\underline{\vec{E_0}}\cdot\vec{k}=0$$
$$\vec{E}(\vec{r},t)=Re\{ $k=\frac{\omega}{c_0}\qquad\lambda=\frac{2\pi}{k}\qquad\lambda f=\frac{\omega}{k}=c_0\qquad\vec{k}:=k\vec{n}$
$\underline{\vec{E_0}}\cdot\vec{k}=0$
$\vec{E}(\vec{r},t)=Re\{ \underline{\vec{E_0}} e^{j(\omega t-\vec{k}\cdot\vec{r})}
\}$$
$$\vec{H}(\vec{r},t)=\frac{1}{kZ_0}(\vec{k}\times\vec{E}(\vec{r},t))$$ \}$
$\vec{H}(\vec{r},t)=\frac{1}{kZ_0}(\vec{k}\times\vec{E}(\vec{r},t))$