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| − | The 61000-4-20 is the standard for the Tem cells
| + | #REDIRECT [[IEC_61000-4-20]] |
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| − | = Emission =
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| − | The Tem cell is a different and cost efficient method, compared to the [[OATS]], to measure the emission patron of the [[EUT]]. This method does have a down side, calculation is needed to correlate the measurements done in the Tem cell to the [[OATS]]
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| − | For the emission there are 2 ways of calculation:
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| − | # multi pole model
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| − | # three voltage measurements
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| − | With the correlation the assumption is that under far field conditions the emitted power
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| − | == Multi pole model ==
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| − | The multi pole model is currently not supported by {{radimation}}
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| − | == Voltage measurements: 3-Positions ==
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| − | Also known as the "To Radiated Power method". In this method the EUT is placed in 3 axis (x,y,z).
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| − | <math>S=\sqrt{ V_{x}^2 + V_{y}^2 + V_{z}^2 }</math>
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| − | <math>V_{x}</math>, <math>V_{y}</math> and <math>V_{z}</math> are the measurements done in Volt on the same frequency but in different directions.
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| − | <math>S</math> is the Root-sum-square of the measured voltages.
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| − | <math>E_{max}=G_{max} * \sqrt{ \frac{3\eta_0}{4\pi} P_0 } </math>
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| − | <math>E_{max}</math> is the maximum field in V/m
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| − | <math>\eta_0=\sqrt{ \frac{\mu_0}{\epsilon_0} } = 120\pi\Omega = 377 \Omega</math>
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| − | <math>G_{max}</math> is the geometry factor determined by the height scan of the receiving antenna.
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| − | === Example calculation ===
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| − | = Immunity =
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| − | [[Category:RadiMation]]
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