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Nexxim Simulator >
Nexxim Component Models >
Grounded Coplanar Waveguide Elements >
Transmission Line, Physical Length with Reference

Transmission Line, Physical Length with Reference

Netlist Format

An instance of a grounded coplanar waveguide transmission line, physical length with reference has the following netlist syntax:

Axxx n1 n2 n3 n4 [W=val] [G=val]
COMPONENT=gcpwtrl SUBSTRATE=substrate_name

n1 and n2 are the names of the nodes attached to the transmission line. n3 and n4 are the reference nodes. The entry COMPONENT=gcpwtrl identifies the element as a grounded coplanar waveguide transmission line, physical length.

The SUBSTRATE=substrate_name is the grounded coplanar waveguide substrate model name selected for the design (see Selecting a Grounded Coplanar Waveguide Substrate for details).

**Grounded Coplanar Waveguide Transmission Line, Physical Length with Reference Instance Parameters**
Parameter	Description	Units	Default
W	Width of center conductor	Meter	1.0e-3
G	Slot gap width	Meter	1.0e-3
P	Physical length	Meter	1.0e-2

Netlist Example

A5 Port1 Port2 Port3 Port4 W=0.75e-3 G=1.1e-3 P=2e-2 COMPONENT=gcpwtrl SUBSTRATE=GCPW1

where GCPW1, the selected layout technology or substrate type, has a definition such as:

.SUB GCPW1 GCPW(
+ H=0.001524 Er=4.4 TAND=0.02 HU=2.54E-4
+ MET1=1.724137931034483 T1=2.54e-5 RGH=0)

Notes

1. Conformal mapping technique is used in the analysis, in which quasi-TEM behavior is assumed. Dispersion is not included in the model.

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