61000-4-20: Difference between revisions

Latest revision as of 13:17, 28 January 2022

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-The 61000-4-20 is the standard for the Tem cells
+#REDIRECT [[IEC_61000-4-20]]
-= Emission =
-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]]
-For the emission there are 2 ways of calculation:
-# multi pole model
-# three voltage measurements
-With the correlation the assumption is that under far field conditions the emitted power
-== Multi pole model ==
-The multi pole model is currently not supported by {{radimation}}
-== Voltage measurements: 3-Positions ==
-Also known as the "To Radiated Power method". In this method the EUT is placed in 3 axis (x,y,z).
-<math>S=\sqrt{ V_{x}^2 + V_{y}^2 + V_{z}^2  }</math>
-<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.
-<math>S</math> is the Root-sum-square of the measured voltages.
-<math>E_{max}=G_{max} * \sqrt{ \frac{3\eta_0}{4\pi} P_0 } </math>
-<math>E_{max}</math> is the maximum field in V/m
-<math>\eta_0=\sqrt{ \frac{\mu_0}{\epsilon_0} } =  120\pi\Omega = 377 \Omega</math>
-<math>G_{max}</math> is the geometry factor determined by the height scan of the receiving antenna.
-=== Example calculation ===
-= Immunity =