امپدانس موج

${\displaystyle Z_0=\sqrt{\frac{{\mu }_0}{{\epsilon }_0}}}$

${\displaystyle c_0=\frac{1}{\sqrt{{\mu }_0{\epsilon }_0}}=299,792,458\text{ m/s}}$

(by the SI definition of the metre)

${\displaystyle Z_0={\mu }_0{c}_0=4\pi \times {10}^{-7}\text{ H/m}\times 299,792,458\text{ m/s}=376.730313\dots \mathrm{\Omega }\approx 120\pi \mathrm{\Omega }}$

${\displaystyle Z=\sqrt{\frac{\mu }{\epsilon }}=\sqrt{\frac{{\mu }_0}{{\epsilon }_0{\epsilon }_r}}=\frac{Z_0}{{\sqrt{\epsilon }}_r}\approx \frac{377}{\sqrt{{\epsilon }_r}}\mathrm{\Omega }}$

,

${\displaystyle Z=\frac{Z_0}{\sqrt{1-{\left(\frac{f_c}{f}\right)}^2}}\text{(TE modes)},}$

${\displaystyle Z=Z_0\sqrt{1-{\left(\frac{f_c}{f}\right)}^2}\text{(TM modes)}}$

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 این مقاله حاوی محتوای تحت مالکیت عمومی از سند «Federal Standard 1037C». General Services Administration است. (in support of MIL-STD-188)