Home / Examples / Electromagnetic Analysis [Hertz] / Example 31: Murata's RF Inductor

Example 31: Murata's RF Inductor

General

The data is available from Murata's web site.
S-parameters of an RF inductor placed on a substrate are solved.
Microstrip lines connect the inductor's electrodes and the ports on the substrate.

Obtain this session's project file. (Right-click and choose 'Save link as')
Results will vary depending on Femtet version and the PC environment.

[How to Reduce the Calculation Time]

Analysis Space

Item	Settings
Analysis Space	3D
Model Unit	mm

Analysis Conditions

Item	Settings
Solver	Electromagnetic Analysis [Hertz]
Analysis Type	Harmonic Analysis

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

Tab	Setting Item	Settings
Mesh	Element Type	2nd-order Element
	Adaptive Meshing	Select [Apply adaptive meshing].
	Frequency-Dependent Meshing	Reference Frequency: 5x109 [Hz] Select [The conductor bodies thicker than the skin depth constitute the boundary condition].
Harmonic Analysis	Sweep Type	Select [Log Step]
	Sweep Values	Minimum: 1x109 [Hz] Maximum: 10x109 [Hz] Number of Divisions: 10
	Sweep Setting	Select Fast Sweep S-parameter Tolerance: 1x10-3
	Input	1.0 [W]
Open boundary	Types	Absorbing boundary
Open boundary	Order of Absorbing Boundary	1st-order

Model

An RF inductor is placed on a substrate. Microstrip lines connect the inductor's electrodes and the ports on the substrate.

Ports are set on outermost faces.

Whole Model	RF inductor (LQP02TN_02, LQP03TG_02 and LQP03TN_02 series)	RF inductor (LQP02TQ_02 and LQP03HQ_02 series)
	1 External electrodes 2 Main body *3 Marking (indicates the top face)	1 External electrodes 2 Main body

Model Creation

Download the LQP03TN_2 series data from Murata's web site. Unzip it in a folder.
Read the database file, LQP03TN0N6_02.fvdb, from the folder. See [How to Utilize Black Box DB].
Complete the model without the inductor.
Import (drag and drop) the model data from the Model DB tree onto the substrate on the modeling window.
and place it on the substrate.

Body Attributes and Materials

Body Number/Type	Body Attribute Name	Material Name
0/Solid	SUBSTRATE	006_Glass_epoxy *1
1-2/Sheet	ELECTRODE	003_Ag *1
3/Solid	Inductor *2	Inductor *2
4/Solid	AIR	000_Air(*)

*1 Available from the material DB.

*2 Imported CAE data
The body attributes and material properties related to the inductor will be replaced by the black box data when the solver runs. Therefore the settings here are irrelevant.

Boundary conditions

Boundary Condition Name/Topology	Tab	Boundary Condition Type	Settings
Port_001/Face	Electric	Port
Port_002/Face	Electric	Port
Outer Boundary Condition	Electric	Electric Wall

Results

The frequency responses of S11 and S22 are shown below.