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Nexxim Simulator >
Nexxim Component Models >
Slotline Elements >
Slotline Substrate Model

Slotline Substrate Model

Defining a Slotline Model

To add an slotline substrate model to a new Nexxim design, you must add the definition to the set of substrate models.

To add a new substrate definition to an existing design, expand the Project icon, then the Design icon. Right click on the Add Model Data icon, and select Add Substrate Definition. The Substrate Definition window appears. Add the substrate name and parameters as desired, then click OK. A substrate added in this manner requires you to specify the metallization parameters explicitly.

To edit the definition of a substrate, expand the Project icon, then the Design icon, then the Data icon. Click on the icon for the substrate you wish to edit. The Substrate Definition window appears. Add or modify the substrate parameters as desired, then click OK.

Slotline Substrate Model Netlist Format

The Slotline substrate model has the following netlist format:

.SUB substrate_name SLOT ( [ER=val] [TAND=val]
+ [H=val] [HU=val] [HL=val]
+ [MET1=val] [T1=val] [MET2=val] [T2=val] [MET3=val] [T3=val]
+ [RGH=val])

The substrate_name is the name for the substrate type used in distributed elements that refer to this substrate definition. The entry SLOT is required to identify the Slotline substrate type. The SLOT identifier must immediately follow the substrate_name.

Inside the parentheses, the labeled parameters may be entered in any order.

**Slotline Substrate Parameters**
Parameter	Description	Unit	Default
ER	Dielectric constant of substrate, 1 £ ER £ 128	None	4.5
H	Dielectric height	Meter	1e-3
HU	Height of upper air layer	Meter	0
HL	Height of lower air layer	Meter	0
MET1, MET2, MET3	Resistivity of metal layer 1, 2, 3	mOhm-cm	0.0
RGH	RMS surface roughness	Meter	0.0
T1, T2, T3	Thickness of metal layer 1, 2, 3	Meter	0.0
TAND	Dielectric loss tangent, [0,0.1]	None	0.0

Slotline Substrate Model Netlist Example

.SUB SLOT1 SLOT(
+ B=0.001524 Er=4.4 TAND=0.02 H=0.5e-3 HU=2.54e-003
+ MET1=1.724137931034483 T1=2.5400e-005
+ RGH=0)

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