Home / Examples / Magnetic Analysis (Gauss, Static Analysis/Harmonic analysis) / Example 17: Directivity of Magnetic Field (Near-Field Radiation)

Example 17: Directivity of Magnetic Field (Near-field Radiation)

General

• The magnetic field generated by a loop coil is analyzed.
   

• The vectors and the directivity of the magnetic field are solved.
   

• Unless specified in the list below, the default conditions will be applied.
   

• Obtain this session's project file. (Right-click and choose 'Save link as')




• Results will vary depending on Femtet version and the PC environment.

 

Analysis Space

Item	Settings
Analysis Space	3D
Model unit	mm

 

Analysis Conditions

Item	Settings
Solver	Magnetic Analysis [Gauss]
Analysis Type	Static Analysis
Options	N/A

 

Model

A solid body of loop coil is defined.

When you calculate the directivity, select open boundary as outer boundary condition.

Body Attributes and Materials

Body Number/Type	Body Attribute Name	Material Name	Mesh Size
2/Solid	Coil	008_Cu *	0.25

* Available from the material DB

 

Body Attribute Name	Tab	Settings
Coil	Current	Waveform: Constant Current: 1 [A] Turns: 1 [Turns] Direction: Loop Coil/Magnetic Field Direction: Magnetic Field Vector: X=0, Y=0, Z=1

Boundary Conditions

Open boundary is set for the outer boundary condition.

Boundary Condition Name/Topology	Tab	Boundary Condition Type	Settings
Outer Boundary Condition	Electric	Open Boundary

 

Results

The vectors of the magnetic field on XZ plane are shown below.

 

The directivity of the intensity of the magnetic field is shown below. (Theta: min 0.0 [deg], max 180 [deg], step 18 )