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Ansoft Designer / Ansys Designer 在线帮助文档：

Nexxim Simulator >
Nexxim Component Models >
Coplanar Waveguide Elements >
   Thin Film Resistor       

Thin Film Resistor


Netlist Format

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An instance of a coplanar waveguide thin film resistor has the following netlist syntax:

ACPWTFRxxx n1 n2 W=val G=val P=val RB=val T=val COMPONENT=cpw_thinfilm_rb SUBSTRATE=substrate_name

n1 and n2 are is the names of the nodes attached to the resistor. The entry COMPONENT=cpw_thinfilm_rb identifies the element.

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

 


Coplanar Waveguide Thin-Film Resistor 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-3

RB

Bulk resistivity

mohm-cm

300

T

Thickness of thin-film resistor

Meter

1e-3

Netlist Example

ACPWTFR5 net1 net5 W=0.75e-3 G=1.1e-3 P=2.5e-3 T=1.75e-4
+ COMPONENT=cpw_thinfilm_rb SUBSTRATE=CPW1

where CPW1, the selected layout technology or substrate type, has a definition such as:

.SUB CPW1 CPW(
+ H=0.001524 Er=4.4 TAND=0.02 HU=2.54E-4 HL=2.54e-4
+ MET1=1.724137931034483 T1=2.54e-5 RGH=0)

Notes

1. A lossy transmission line is used to model the TFR section. Distributed effects are thus taken into consideration.

2. The user needs to define the CPW steps, if any. They are not included in the TFR model.

 



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