All CAD features are composed of planar facets which define the geometry. The set of material properties assigned to each facet determines its electromagnetic behavior for reflection, transmission, and diffraction. For foliage, the material is assigned at the structure level of foliage features in addition to the face level. The display properties are included in the material property.
Wireless InSite provides users with a pre-installed database of materials such as wood, drywall, glass, wet earth, PEC, etc. at various frequencies. Users can save their custom materials in a database.
Types of Materials:
One or more lossy dielectric layers of finite thickness
PEC backed layer
Single lossy dielectric layer on top of a metal layer
Polarization dependent, independent of incidence angle
Perfect electrical conductor (PEC)
Monte Carlo for parameter uncertainty
Magnitude and phase vs. incidence angle and polarization
Dependence on frequency and incident plane
Attenuation in dB/m
The effective permittivity is determined from the biophysical characteristics of the tree, such as leaf area, leaf density, branch size, branch density, etc.
Option for adjusting the effective permittivity to agree with a measured attenuation at a single frequency