Homogenization Modeling of Periodic Magnetic Composite Structures

Conventional closed-form homogenizing rules may be not accurate if the contrast of material properties is high, such as the case of ferrite tiles with gaps used in EMC anechoic chambers. A new homogenization method is proposed to handle such extreme cases. It uses the field solution of a single unit cell illuminated by a plane wave incident in the normal direction. By doing this, the physical interactions between adjacent inclusions can be taken into account. Numerical results demonstrate the superiority of the proposed method over conventional closed form homogenizing rules.