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Transmission Line, Physical Length with Reference

Transmission Line, Physical Length with Reference

Netlist Format

An instance of a transmission line with physical length and reference nodes has the following netlist syntax:

Axxx n1 n2 n3 n4 [W=val] [P=val]
COMPONENT=TRL SUBSTRATE=substrate_name

n1, n2, n3, and n4 are the names of the nodes attached to the transmission line. The entry COMPONENT=TRL identifies the element as a transmission line with physical length.

The entry SUBSTRATE=substrate_name identifies the Stripline substrate model name selected for the design (see Selecting a Stripline Substrate). See the Stripline (SL) Substrate for information on this substrate type.

**Transmission Line with Physical Length and Reference Nodes,**
**Instance Parameters**
Parameter	Description	Units	Default
P	Physical length	Meter	10e-3
W	Conductor width	Meter	1e-3

Netlist Example

A5 Port1 Port2 0 0 W=0.001 P=0.01
+ COMPONENT=TRL SUBSTRATE=SL1

where SL1, the selected layout technology or substrate type, has a definition such as:

.SUB SL1 SL( B=0.001524 Er=4.40000000000000
+ TAND=0.0200000000000000 MET1=1.72413793103448
+ T1=1.7145e-005 RGH=0mil)

Notes

1. [Stripline] For accurate results, the substrate definition should have W/B <10.

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