Based on Mie scattering theory, an electromagnetic (EM) wave loss model of spherical wave-absorbing aggregates with ferrites uniformly distributed in ceramsite was established. In addition, the Mie series solution for calculating the EM scattering of homogeneous dielectric spheres was derived. Through MATLAB programming, the attenuation coefficient, scattering coefficient, and absorption coefficient of functional aggregates were calculated, and the effects of wave absorber content, particle size, and frequency of the incident wave on the aggregate EM loss performance were studied. These results showed improved EM wave loss capacity of ferrite-containing ceramsite aggregates when the amount of the wave absorber was 20%, the particle radius was between 5 and 10 mm, and the frequency of the incident wave was between 8 and 20 GHz.
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