3.3    Medium Addition

Other media can be added in the following ways:

·          by double click on the Media group

·          by choosing Edit Project Media command from Media group context menu

·          by clicking  button from Geometry tab

·          by choosing Edit Project Media command from Media... label menu in the Geometry tab

All methods described above lead to the Project Media dialogue:

The user can add other media, which will be used in the project by pressing Add button and defining their parameters in the Edit Medium dialogue.

Each non-dispersive medium can have up to eighteen parameters. Twelve of them describe its electromagnetic properties: permittivity, permeability, conductivity and magnetic losses along the three main axes of the coordinate system. Dispersive media have additional parameters describing the dispersion model or models.

There are also six thermal parameters. Specific heat, initial temperature, and thermal conductivity are relevant only if the QW-3D package operates with the optional Basic Heating Module (QW‑BHM) module and thermal conductivity is relevant for Heat Flow (QW-HFM) module. Density is used in QW-BHM, and also for calculating Specific Absorption Rate (SAR).

Note the following meaning of abbreviations used in the Edit Medium dialogue:

·         Eps = e_r [dimensionless]

·         Mu  = m _r [dimensionless]

·         Sigma = s [S/m]

·         SigmaM = s_m/(k)⁴ = wm₀m_r“/(k)⁴ » wm₀m_r“/(120*π)²  [W/m], k = (μ₀/ε₀) ^0.25 » (120 p)^0.5

·         Density = r [g/cm³]

·         Specific heat [J/(g°C)]

·         Initial temp. [°C]

·         Thermal Conductivity= Kx, Ky, Kz [W/cm°C]

The Pen and Brush commands, which are used to assign colours to media and then to object with the particular medium assigned. They affect also the QW-Editor and QW-Simulator displays as follows:

·         when an element made of a certain medium is drawn manually, Pen assigned to the medium determines the colour for displaying this element. However, subsequent changes of the medium assigned to this element are not automatically reflected in the changes of colour.

·         when TestMesh operation is performed in QW-Simulator, each homogeneous subregion is displayed as determined by Brush of the medium, and meshing over this subregion is drawn in Pen.

The Chart button is available for Dielectric dispersive, Metamaterial, and Cold Plasma materials and invokes Dispersive Media Chart with dispersive characteristics for the specified frequency range.

The following media types are supported byQuickWave:

·         PEC

·         PMC

·         Metallic

·         Dielectric isotropic

·         Dielectric anisotropic

·         Dielectric dispersive

·         Dielectric dispersive anisotropic

·         Dielectric dispersive nonlinear

·         Cold Plasma

·         Metamaterial

·         Ferrite