Many of my articles call for finding the complex permeability of a ferrite components from manufacturer’s data.
Let’s explore an example used in a recent article, Another small broadband RF transformer using medium µ ferrite core for receiving use – 50:450Ω.
The core used was a Fair-rite ferrite core of #43 material, and the magnetising impedance of a 5t winding needed to be found.
Above is a chart from Fair-rite’s catalog. Permeability is a complex quantity and is frequency dependent. One could scale from the graph, the values for µ’ and µ” at the frequency of interest. Continue reading Online calculator of ferrite material permeability interpolations