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Nexxim Simulator > W-Model Transmission Line, FIELDSOLVERW Fieldsolver Model Netlist SyntaxThe netlist format for a W-model transmission line with FIELDSOLVER model type is: .MODEL modelname W MODELTYPE=FIELDSOLVER RLGCFILE=filename ACCURACY=low|medium|high FDIE=freq LAYERSTACK=stackname CONDUCTOR=( SHAPE=shapename [MATERIAL=materialname] [ORIGIN=(x,y)] [TYPE=SIGNAL|REFERENCE] ) [CONDUCTOR=( SHAPE=shapename [MATERIAL=materialname] [ORIGIN=(x,y)] [TYPE=SIGNAL|REFERENCE] )]...
Example FIELDSOLVER Model Statement.MODEL fs_test W MODELTYPE=FIELDSOLVER FIELDSOLVER Model Notes1. FIELDSOLVER models in externally-generated netlists may contain FSOPTIONS, RLGCFILE, COORD, or OUTPUTFORMAT parameters. These parameters are ignored by this version of Nexxim. 2. The Nexxim fieldsolver uses Cartesian coordinates only. Polar coordinates are not supported. 3. The Nexxim fieldsolver supports conductors of type SIGNAL and REFERENCE. The presence of any conductors of type FLOATING in an externally-generated netlist will cause simulation to fail. .MATERIAL StatementThe .MATERIAL statement defines the parameters for a single material type. The syntax is: .MATERIAL materialname METAL|DIELECTRIC [ER=val] [CONDUCTIVITY=val] [LOSSTANGENT=val] The material must be defined to be either METAL or DIELECTRIC.
Example .MATERIAL Statements.MATERIAL copper METAL CONDUCTIVITY=57.6meg MATERIAL Statement Notes1. PEC is a system-defined METAL material with the default values for METAL materials. 2. AIR is a system-defined DIELECTRIC material with the default values for DIELECTRIC materials. 3. The parameter values for these system-defined material names cannot be changed. .LAYERSTACK StatementThe .LAYERSTACK statement specifies the sequence of dielectric and metal layers in the object to be analyzed. The syntax is: .LAYERSTACK stackname
Example .LAYERSTACK Statement.LAYERSTACK stack_1
.SHAPE StatementThe .SHAPE statement specifies the cross-sectional shape of a conductor. Rectangle, circle, polygon, and strip shapes are supported in Nexxim.
.SHAPE shapename RECTANGLE WIDTH=val HEIGHT=val The origin for a rectangular conductor is at the lower left corner.
.SHAPE shapename CIRCLE RADIUS=val The origin for a circular conductor is the center of the circle.
.SHAPE shapename POLYGON VERTEX=[x1, y1, x2, y2, ...] The origin for a polygonal conductor can be any vertex; x1, y1 is recommended.
.SHAPE shapename STRIP WIDTH=val The origin for a 2D strip conductor is the left edge.
Example SHAPE Statements.SHAPE rect_1 RECTANGLE HEIGHT=0.01mm WIDTH=0.4mm Netlist Example of W FIELDSOLVER Transmission LineHere is an example of a W FIELDSOLVER transmission line that includes all of the statement types described in this topic. * W FIELDSOLVER TRANSMISSION LINE EXAMPLE W1 Port1 Port2 0 Port3 Port4 0 N=2 L=10e-3 FSMODEL=fs_test .MATERIAL copper METAL CONDUCTIVITY=57.6meg .SHAPE rect_1 RECTANGLE HEIGHT=0.1mm WIDTH=0.4mm .LAYERSTACK stack_1 .MODEL fs_test W MODELTYPE=FIELDSOLVER The transmission line described by this netlist can be diagrammed as: HFSS视频教程 ADS视频教程 CST视频教程 Ansoft Designer 中文教程 |
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