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Ansoft Designer / Ansys Designer 在线帮助文档：

Nexxim Simulator >
Nexxim Component Models >
Stripline Elements >
Step

Step

Netlist Format

A step instance has the following netlist format:

Axxx n1 n2 W1=val W2=val D=val [NSUM=val]
COMPONENT=step SUBSTRATE=substrate_name

n1 and n2 are the names of the nodes attached to the step. The entry COMPONENT=step identifies the element as a step.

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.

**Step Instance Parameters**
Parameter	Description	Unit	Default
W1	Width of line connected to node n1	Meter	1e-3
W2	Width of line connected to node n2	Meter	1e-3
D	Offset between lines	Meter	(W2-W1)/2

Netlist Example

A23 Port1 Port2 W1=1e-3 W2=2e-3 D=0.5e-3

+ COMPONENT=STEP 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] The following condition should be satisfied to get accurate results:
max(W1,W2)/l_g £ 1.0, where l_g is the guide wavelength

References

1. R. Hoffmann, Handbook of Microwave Integrated Circuits, Artech House, 1987.

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