Temperature dependent EM performance predictions of dielectric slab based on inhomogeneous planar layer model

During flight operations, the dielectric properties of the wall of airborne dielectric structure (like radomes, coatings etc.) vary due to large temperature gradient existing across the wall. Such dielectric walls can be modeled as inhomogeneous structures consisting of stacked layers of dielectric materials with varying dielectric parameters. The present work is focused on the temperature dependent EM performance predictions of above mentioned dielectric walls based on inhomogeneous planar layer (IPL) model using equivalent transmission line method. The material considered is an alloy of silicon nitride (Si₃N₄), a promising aerospace material with excellent temperature resistance, dielectric and mechanical properties.