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- 2$\begingroup$ Complex permeability is the direct and right measure of the ferrite core performance. You can use a VNA to measure the impedance of a one-turn inductor over the frequency range of interest. However, when you mention EMI or power supply wires or motor lines, the way to think about the "choke" is completely different depending on your aim. Whether you are trying to stop the common mode RF or the wideband noise or something else. You want to be specific about the scenario of the problem you try to solve for now. $\endgroup$Ryuji AB1WX– Ryuji AB1WX2025-10-26 01:38:54 +00:00Commented Oct 26 at 1:38
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