[SI-LIST] Re: Loss in HSPICE W Element

Is the field solver an add on to HSpice? I don't see it described in the 
manual.  ----- Original Message ----- From: "Timothy Coyle" 
<Timothy.Coyle@xxxxxxx>To: <si-list@xxxxxxxxxxxxx>Sent: Friday, March 14, 2003 
5:45 AMSubject: [SI-LIST] Loss in HSPICE W Element
> 
> 
> Hi,
> I have made a 100 Ohm differential microstrip trace using the HSPICE field
> solver. I am trying to get the field solver to give
> loss results, such as Rs and Ro. But each time I run HSPICE, I only get L
> and C values. Can anyone see what I might be
> doing wrong? I am using version 2001.2
> 
> Thanks,
> Tim
> 
> 
> 
> *
> * Define the board materials
> .MATERIAL dielectric_fr4 DIELECTRIC ER=4.2 LOSSTANGENT=0.02
> .MATERIAL copper METAL Conductivity=5.813E7
> 
> * Define the cross section of the traces as a rectangle
> * 1.0 oz. copper has height of 1.44mils
> .SHAPE rect RECTANGLE WIDTH=6mil, HEIGHT=1.2mil
> 
> * Define the layer stackup
> * Layer=(material name, thickness)
> .LAYERSTACK diff_micro
> + LAYER=(PEC,1um)             * ideal air (top layer)
> + LAYER=(dielectric_fr4,3.5mil)           * dielectric layer
> 
> * Define Field Solver Options
> .FSOPTIONS opt1 PRINTDATA=yes
> + ACCURACY=HIGH
> + ComputeRo=yes ComputeRs=yes ComputeGo=Yes ComputeGd=yes
> * Model Definition
> .MODEL diff_microstrip W MODELTYPE=FieldSolver,
> + LAYERSTACK=diff_micro, FSOPTIONS=opt1,
> + RLGCFILE=diffmicro.rlgc
> + CONDUCTOR=(SHAPE=rect, ORIGIN=(0,3.5mil)),
> + CONDUCTOR=(SHAPE=rect, ORIGIN=(100mil,3.5mil))
> *
> 
> 
> *SYSTEM_NAME : diff_microstrip
> *
> *       Half Space, air
> *  ------------------------------------ Z = 8.99e-05
> *       dielectric_fr4   H = 8.89e-05
> *  ------------------------------------ Z = 1e-06
> *  //// Bottom Ground Plane ///////////
> *  ------------------------------------ Z = 0
> 
> * L(H/m), C(F/m), Ro(Ohm/m), Go(S/m), Rs(Ohm/(m*sqrt(Hz)), Gd(S/(m*Hz))
> 
> .MODEL diff_microstrip W MODELTYPE=RLGC, N=2
> + Lo =  2.88615e-07
> +       6.05346e-10  2.88615e-07
> + Co =  1.15222e-10
> +      -4.70212e-14  1.15222e-10
> + Ro =  0.00000e+00
> +       0.00000e+00  0.00000e+00
> + Go =  0.00000e+00
> +      -0.00000e+00  0.00000e+00
> + Rs =  0.00000e+00
> +       0.00000e+00  0.00000e+00
> 
> 
> 
> 
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