Example 44: Thin Electrode Elements

The analysis with thin electrode elements is performed. See [Thin Electrode Elements] for more information.
Thin Electrode Elements Model: Create a sheet body and set the material and the body attribute (sheet thickness) to the sheet body.
For the analysis with the electrode thickness taken into account, select [Take into account thickness of face/edge electrode].
Unless specified in the list below, the default conditions are applied.

This example uses the waveguide of parallel plates. Please note that the outer boundary condition is changed to the magnetic wall.

Item	Settings
Solver	Electromagnetic Analysis [Hertz]
Analysis Space	3D
Analysis Type	Harmonic Analysis
Unit	mm
Analysis Options	Electrode Setting Select [Take into account thickness of face/edge electrode]. *

Harmonic Analysis tab and Open Boundary tab are set as follows.

The waveguide of parallel plates is modeled to analyze the propagation of plane waves.

Boundary conditions are set as follows.

Point 1: The outer boundary condition is changed to the magnetic wall.

Point 2: The top and bottom faces are set with the electric wall.

* Available from the material DB

Body Attribute Name	Tab	Material Name
ThinFilmElectrode	Thickness/Width	1.×10-5 [mm]

Material Name	Tab	Properties
METAL	Permittivity	Relative Permittivity: 1.0
	Permeability	Relative Permeability 1.0
	Electric Conductivity	Select [Conductor]. Conductivity: 1.e7

Boundary Condition Name/Topology	Tab	Boundary Condition Type	Settings
EW/Face	Electric	Electric Wall
Port_001/Face	Electric	Port	Reference Impedance: Select [Use the characteristic impedance calculated from the port structure].
Port_002/Face	Electric	Port
Outer Boundary Condition *	Electric	Magnetic Wall

※ Although the default setting of the outer boundary condition is the electric wall, the magnetic wall is used here.

Poynting vectors on average are shown below. The color of the arrow indicates the magnitude of the Poynting vector.

The color changes from red to blue across the thin electrode, indicating the magnitude decreases.

Examine the S-parameters of the waveguide.

[Results]>[Show Results]>[Show Characteristics Chart]>[SYZ Matrix]>[View]>[Matrix Viewer],

S-parameters are displayed.

S21 of -26 [dB] indicates that the electromagnetic waves pass through the thin electrode elements.

If the electromagnetic waves fail to pass through, the model may not be set properly.

Please check whether [Take into account thickness of face/edge electrode] is selected.

See [Thin Electrode Elements] of technical note for comparison with theoretical values.