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Nexxim Simulator >
Nexxim Component Models >
Stripline Elements >
   Tapered Line, W Specified, Exponential Width Taper       

Tapered Line, W Specified, Exponential Width Taper

 

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Netlist Format

An instance of a tapered line, W specified, exponential width taper has the following netlist syntax:

Axxx n1 n2 n3 n4 W1=val W2=val P=val TAPER=ExpWidth COMPONENT=taper_width_specified SUBSTRATE=substrate_name

n1 and n2 are the names of the nodes attached to the tapered line, n3 and n4 are the reference nodes. The entry COMPONENT=taper_width_specified identifies the element as a tapered line, W specified.

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.

 


Tapered Line, W Specified, Exponential Width Taper,
Instance Parameters

Parameter

Description

Units

Default

P

Physical length

Meter

1e-2

W1

Width of line at node 1

Meter

1e-3

W2

Width of line at node 2

Meter

1e-3

TAPER

Taper type: Must be ExpWidth—Exponential Width

None

ExpWidth


Netlist Example

A2 Port1 Port2 W1=0.001 W2=0.003 P=0.01 TAPER=ExpWidth
+ COMPONENT=taper_width_specified 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. [All substrates] Node numbers can be reversed, so that n1 and associated width W1 are at the wide end of the taper.

2. [All substrates] The Nexxim exponential width tapered line element has a physical footprint in Designer.

3. [Stripline] The substrate definition should satisfy the following conditions:
0.01 £ W/B £ 100, max(W1,W2) £ 0.5lg, where lg is the guide wavelength.




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