• $$C$$ : Circumference of the loop [m]
• $$A$$ : Area of the loop [m]
• $$\lambda$$ : Wavelength [m]
• $$N$$ : Number of turns of the loop
In order to determine the radiation resistance of a ferrite core, it is necessary to find the relative effective magnetic permeability of the ferrite core ( $$\mu_{cer}$$). Other variables are known geometrical and electrical properties.