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MS Tapered Line, W Specified (MSTAPW, MSTAPW_REF)

MS Tapered Line, W Specified (MSTAPW, MSTAPW_REF)

Schematic Symbol (MSTAPW)

Schematic Symbol (MSTAPW_REF)

Properties	Description	Units	Default	Range
W1	Width of the line at node n1	m	Required	> 0
W2	Width of the line at node n2	m	Required	> 0
P	Physical length of taper	m	Required	> 0
TAPER	Taper type	keyword	LinWidth	[LinWidth, LinImp, ExpWidth, ExpImp]
sub	Substrate name	none	Required	string
CoSimulator	Simulation engine	none		Planar EM
CoSimStackup	Stackup used for simulation	none	Layout Stackup	Layout Stackup, Footprint stackup, Substrate

Notes

1. The following conditions should be satisfied: 0.01 £ W/H £ 100, and Max (W1,W2) £ 0.5×l_g, where l_g is the guide wavelength.

2. Node numbers can be reversed such that n1 (and associated width W1) is at the wide end of the taper.

3. The taper type is set through the keyword parameter TAPER, such that:
LinWidth: Linear Width
ExpWidth: Exponential Width
LinImp: Linear Impedance
ExpImp: Exponential Impedance

Netlist Form

MSTAPW:NAME n1 n2 [ n3 ] [ n4 ] W1=val W2=val P=val TAPER=val SUB=label

Netlist Example

MSTAPW:1 4 6 W1=2MIL W2=7MIL P=100MIL TAPER=LinImp SUB=SUB1

where sub1 needs to be defined in the corresponding .sub statement.

References

Unpublished equations developed by Ansoft LLC, based on the discretization of the transmission line.

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