CAE Software【Femtet】Murata Software Co., Ltd.
Example29 Plane Waves
General
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Plane waves are analyzed.
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Unless specified in the list below, the default conditions will be applied.
Analysis Space
|
Item |
Settings |
|
Analysis Space |
3D |
|
Model unit |
mm |
Analysis Conditions
|
Item |
Settings |
|
Solvers |
Electromagnetic Analysis [Hertz] |
|
Analysis Type |
Harmonic analysis |
Mesh tab, Harmonic analysis tab and Open boundary tab are set as follows.
|
Tab |
Setting Item |
Settings |
|
Harmonic analysis |
Frequency |
Single frequency 2×10^9[Hz] |
|
Incident wave (plane wave) |
Propagation Direction |
(0, 1, 1) |
|
Electric Field Vector |
(1, 0, 0) |
|
|
Open boundary |
Type |
Absorbing boundary |
|
Order of Absorbing Boundary |
1st degree |
Model
The model consists of an air cube only: Body_Attribute_001 The open boundary condition is set around the cube.
Body Attributes and Materials
|
Body Number/Type |
Body Attribute Name |
Material Name |
|
0/Solid |
Body_Attribute_001 |
Material_Property_001 |
|
Material Name |
Tab |
Properties |
|
Material_Property_001 |
Permeability |
Relative Permeability 1.0 |
|
Material_Property_001 |
Permittivity |
Relative permittivity: 1.0 |
Boundary Conditions
|
Boundary Condition Name/Topology |
Tab |
Boundary Condition Type |
Settings |
|
Outer Boundary Condition |
Electric |
Open boundary |
Results
The electric field vectors are shown below. “Maximum value: 1.005”, which appears under the color scale,
indicates the maximum value of the electric field vectors set on [Analysis Condition Setting] dialog box – [Incident Wave] tab.
The figure is viewing the YZ plane from positive X direction. The coordinates of the left bottom corner is (x, 0, 0).
The electric field vector at (0, 0, 0) corresponds to the incident waves electric field vector (1, 0, 0).
The propagation direction can be viewed by animation or by incrementing the phase little by little.
The plane waves propagate in the (0, 1, 1) direction.
Figure 1. Electric Field Vectors
The magnetic field vectors are shown below. The maximum value is 2.664[mA/m].
Multiply it with the impedance of free space, 377[Ohm]. The result is the electric field, 1[V/m].
Vectors in Figure 2 are shown on Grids for easy observation.
Figure 2. Magnetic Field Vectors