Databases, Material Properties

Assign material properties to objects (for example, buildings and walls) in databases.

For wave propagation models, the material properties of buildings and walls can have a significant impact on the results. It is, therefore, important to assign the correct material properties to an object (for example, buildings in an urban database and walls or subdivisions in indoor databases).

The consideration of different materials is even more important for the indoor scenarios as a large spectrum of wall materials exists, along with their properties and their thickness). However, for urban databases, in most cases, the same default material for all buildings is utilized (due to lack of information concerning the individual building materials).

Material Catalogue

When creating a new database in WallMan (File > New Database), it can be convenient to load the material catalogue1. When editing an existing database in WallMan, you can click Edit > Materials and then click Import to import materials from the material catalogue. You can edit material properties and add frequencies to the list.

Definition Methods for Material Properties

Material properties are provided in two ways.
  • Empirical values for quantities, like transmission loss and reflection loss.
  • Electrical properties, such as relative dielectric permittivity and electrical conductivity.

Depending on settings in ProMan, empirical or more rigorous properties are used. For frequency-dependent materials, ProMan uses the material properties of the nearest available frequency in the material database.

A Microsoft Excel spreadsheet is included and enables you to compute empirical properties from electrical properties and material thickness.

1 GlobalMaterialCatalogue.mcb