Materials 6.2.9

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3.1. Add

When Add is selected, the Add Material window appears, as shown in the next Figure.

Add Material panel

 

Select the required parameters and click on Save. When clicking on this button, if the material exists, then a message is displayed informing the user that the material has already been defined. Otherwise, the material definitions are saved.

In the Add Material window, the following options are available:

  • Material Attributes - Name: The user specifies the desired name for the new material.
  • Material Attributes - Color: For more information, see APPENDIX A: Color Selection.
  • Material Definition - Material defined by geometry: Used to define a material according to its physical properties. After clicking on the Set Parameters button, three different options are available in the Material defined by Geometry window: 

o   Constant. To set the material properties immutable. Epsilon (e’) and Mu (µ’) are defined with the same restrictions.

 

 

Material defined by geometry, tab ‘Constant’

 

§  Real part: common values are greater than or equal to 1.0.

§  Imaginary part: if the imaginary part is negative, the material is considered to have losses; otherwise it would be equivalent to a material with gain.

 

o   Variable. To assign the physical properties of the material according to the frequency.

 

Material defined by geometry, tab 'Variable'

 

§  Frequency (in GHz): Sets the associated frequency to the physical properties. The frequency values for each material are interpolated when the simulation is launched in order to use the most suitable one for the working frequency.

§  Real part (’): common values are greater than or equal to 1.0.

§  Imaginary part (’’): if the imaginary part is negative, the material is considered to have losses; otherwise it would be equivalent to a material with gain.

§  Add: to add new frequencies to the material properties.

§  Remove: to remove existing frequencies to the material properties.

 

If this option is selected, once the meshing process has been completed, a new text file (.txt) appears in the materials directory with the same name given to the material. I order to use this file in other simulations, change its localization (for example, copy this file in mydatafiles directory).

 

These parameters can also be set using formulas in function of the frequency values. Selecting ‘Formula Definition’ option and clicking on ‘Set Parameters’ it is possible to set the formulas in function of the frequency parameters.

 

Define formula parameters

 

o   Import Material File. The user can import a file with the same format as the file generated with the Variable option as shown below.

Material defined by geometry, tab ‘Import Material File’

File Format

The information of this file can be modified by the user. Be sure not to modify the format and not to introduce any additional line break. 

  • Material Definition - Material defined by reflection coefficient. Used to define a material according to its reflection coefficient. After clicking on the Set Parameters button, three different options are available in the Material defined by reflection window ( the following Figure):

o   Constant. To set the material properties invariable. Amplitude and Phase are defined using decibels (dB) and degrees (degrees).

Material defined by coefficient, tab ‘Constant’

 

o   Variable with frequency and angle. To assign the refraction properties of the material according to the frequency and angle.

Material defined by coefficient, tab 'Variable'

 

§  Frequency (in GHz): Sets the associated frequency to the physical properties. The frequency values for each material are interpolated when the simulation is launched in order to use the most suitable one for the working frequency.

§  Angle (in degrees): Sets the associated angle to the physical properties.

§  Add: to add new frequencies to the material properties.

§  Remove: to remove existing frequencies to the material properties.

 

If this option is selected, once the meshing process has been completed, a new text file (.txt) appears in the materials directory with the same name given to the material. I order to use this file in other simulations, change its localization (for example, copy this file in mydatafiles directory).

 

Alternatively, their parameters can be set using formulas in function of the frequency and angle values by selecting the ‘Formula Definition’ option and clicking on ‘Set Parameters’.

Define formula parameters

 

o   Import Material File. The user can import a file with the same format as the file generated with the Variable option as shown below.

Material defined by coefficient, tab ‘Import Material File’

File Format

The information of this file can be modified by the user. Be sure not to modify the format and not to introduce any additional line break. 

 

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