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本帖最后由 shark4685 于 2010-6-25 15:35 编辑
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第四讲
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8 ]; w k! z+ s ~2D场求借器--用来求传输线的s 参数等....
* @* A) A2 _" x1 r1 ]0 G! _----------------------------------------------------------------------网表如下:
5 h G4 P( Y) c( ?$ Q* j*Micro Diff stripline
1 ^' k" J5 s. Y0 X*Micro Diff stripline.sp : caluclate micro diff stripline's s parament&rlgc model[*.s4p&*.rlgc]# z, ^8 r. X" h( u3 B
*created by Li Liming' \7 V/ b- n) D1 X' D7 e; L
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* Material ×××
, K. X) R5 b$ e0 B$ t* S* Stack layer* P& r( o# y: H
*//////////----dWidth--- dGap ---dWidth----//////////dThickness+ {/ g/ W) m& u; N& y8 j) ]
*////////////////////////////////////////////////////dHeight1* M/ a& \9 v( s! I1 _. ]/ _
*----------------------------------------------------dThickness h2 M% Q! D* B6 k3 ^$ Q* W
******************************************************
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* b5 n( r r) i* a; e, E.param dHeight1=9.84mil
. R8 n" }* Z6 G6 R.param dWidth =10mil$ v) {/ }: ? b
.param dGap =8mil7 B2 `) S! S5 y' }; T& @6 y
.param dThickness=2.2mil
3 M0 C; L0 p9 X4 o8 x.param dLength=6000mil4 g0 K- U7 o% q
' R6 Z. j& A& Q3 o% ^" t6 P*******定义2种材料*******
* c( n% ]) i8 w F. s+ Z+ ]; t& S.material die dielectric er=3.48 losstangent=0.0037
3 D' C6 \8 ~$ Y/ {5 E2 i+ C- C4 s.material copper metal conductivity=57.6meg8 _. x5 `7 @6 C/ t- w
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*******定义走线的参数,如形状,长度,厚度*******( `; B( w& `4 b3 I# g
.shape trace rectangle width=dWidth height=dThickness
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*******定义层叠, 注意层叠是从下往上的。*******
- r% K8 r* s+ }2 d) l: V y% ~.layerstack stack" h, e' V1 ]5 G9 L/ s4 u9 }; \
+layer=(copper,dThickness) layer=(die,dHeight1)
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*******定义仿真精度,格点,输出数据,计算类型*******! |# z$ {" O, J/ \' K
.fsoptions opt1 printdata=yes computeg0=yes computegd=yes computer0=yes computers=yes* U& Y8 |6 v8 Q4 N" t
+ACCURACY = LOW GRIDFACTOR = 1
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% z. L" C: B! M6 U*******定义扫描过程*******+ i8 M" R) }( B$ G" o! d9 J
.model dstrip w modeltype=fieldsolver
: r4 R8 z8 o* [+layerstack=stack
7 }4 U1 F2 U5 j8 K4 {+fsoptions=opt1, F8 u) F) d' {, ~: M6 y
+rlgcfile=micro_diff_stripline.rlgc
! g: u K4 x0 ~8 x, k+outputformat=rlgcfile
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' `: K4 r: M% B# I* N2 A6 @& v0 s******把差分的2段导体分别放置在平面上,用如下坐标定义他们的位置)*********
3 b4 S# @+ F% I& D. T6 A+ _: j+conductor=(shape=trace origin=(0mil,'dHeight1+dThickness') material=copper type=signal)8 ]3 M8 r f" s4 m9 [7 J
+conductor=(shape=trace origin=('dWidth+dGap','dThickness+dHeight1') material=copper type=signal)
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*******信号类型*******5 E+ d# R4 ^6 {: R3 V
wtrace inP inN 0 outP outN 0 fsmodel=dstrip n=2 l=dLength
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.tran 25ps 1ns
5 S: N4 k$ Q4 m1 e1 |& `.probe v(inp) v(inn)
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*******.LIN语句,导出s参数******** [- H t9 t$ V. g; B# F5 M2 K
.LIN sparcalc=1 modelname=my_custom_model
% t, d. a. h* g' l8 B+ n9 W$ O1 B+ filename=couple2line format=touchstone dataformat=db0 L7 h" ]7 L/ h1 P/ j
% t b7 Z5 g* c9 a5 D( Q*******定义2个节点间的端口******) ]/ I% i2 u0 `( }. P- E1 J) m
P1 inP inN 0 dc=0 ac=0.84 port=1 z0=50; g1 T. H5 M' f% h
P2 outP outN 0 dc=0 ac=0.84 port=2 z0=50! j+ b( R+ {0 k% s
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.AC LIN 100001 1g 15G7 w. B1 f' J6 x. @
4 d3 S d, i/ t* d.end
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% Y3 z& G8 `8 X微带差分线的s参数 从1g-15g |
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