Unit power
\[ P_{\text{dBm}} = 10 \times \log_{10}(P_{\text{W}} \times 1000) \]
\[ P_{\text{W}} = \frac{10^{\frac{P_{\text{dBm}}}{10}}}{1000} \]
Unit distance
\[ 1 \text{ mil} = 0.0254 \text{ mm} \]
\[ 1 \text{ mil} = 0.001 \text{ inch} \]
\[ 1 \text{ inch} = 25.4 \text{ mm} \]
Unit ratio
\[ \text{Voltage ratio: } \text{dB} = 20 \times \log_{10}\left(\frac{V_2}{V_1}\right) \]
\[ \text{Current ratio: } \text{dB} = 20 \times \log_{10}\left(\frac{I_2}{I_1}\right) \]
\[ \text{Power ratio: } \text{dB} = 10 \times \log_{10}\left(\frac{P_2}{P_1}\right) \]
Unit power
Equivalent power
Unit distance
Equivalent distance
Unit ratio
Equivalent ratio
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