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本帖最后由 shark4685 于 2010-6-25 15:35 编辑 % T/ T( \8 l' J+ z0 _
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第四讲$ T3 _5 }, B2 N \2 S6 `
& y6 r8 x# m G+ e9 q2D场求借器--用来求传输线的s 参数等....
2 D- S4 m+ H" b3 c* c8 k" B----------------------------------------------------------------------网表如下: e( W2 B) p! D( U+ t
*Micro Diff stripline& ]* ?2 ^% g, ^3 L. n& f
*Micro Diff stripline.sp : caluclate micro diff stripline's s parament&rlgc model[*.s4p&*.rlgc]
* m$ y4 g% x; ]4 k*created by Li Liming
3 G5 e, J- }$ |$ P1 f; n6 J*****************************************************
/ L; @" `1 k, J6 j2 b* `, ^- l9 D* Material ×××1 ~+ `' Q: t& u0 }! n/ V
* Stack layer
) F- P3 z, L6 T% m: ?*//////////----dWidth--- dGap ---dWidth----//////////dThickness
' d8 s! i* y) \" e; p7 ]. e*////////////////////////////////////////////////////dHeight1+ i' K# B2 o* a
*----------------------------------------------------dThickness, n% y0 a4 x+ v6 [7 y
******************************************************5 ~. \9 u! ^* Q
) C1 K# a7 Y0 F+ @.param dHeight1=9.84mil
) [2 i: ^: q. ]8 a! h8 U.param dWidth =10mil" Q& m: z1 d6 l* G. c* }
.param dGap =8mil9 _- x$ K9 r( M' p" B+ _
.param dThickness=2.2mil* _9 c3 E9 \& F* e) z( o
.param dLength=6000mil
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' t5 d& C4 a" O, u/ J+ p*******定义2种材料*******
: |% {* ]" @- a4 e.material die dielectric er=3.48 losstangent=0.0037
, [% U: v! I& `7 G.material copper metal conductivity=57.6meg
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*******定义走线的参数,如形状,长度,厚度*******+ A- r* f: M; Q
.shape trace rectangle width=dWidth height=dThickness ?- I8 B3 a8 b3 O Q
- k" R2 a8 }$ Y! M: b( O3 y0 w*******定义层叠, 注意层叠是从下往上的。*******
7 M% N; I: H5 F% M# t.layerstack stack
, S1 J& H1 E6 l0 Z3 V1 G0 k) t+ j+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*******- u/ b0 |* x' l
.fsoptions opt1 printdata=yes computeg0=yes computegd=yes computer0=yes computers=yes9 V: J: o# O' F0 B
+ACCURACY = LOW GRIDFACTOR = 1; j0 j* S1 U) F f
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*******定义扫描过程*******8 b( {0 H6 j! Q$ m2 _
.model dstrip w modeltype=fieldsolver
8 `0 i* ^ i8 ~+ K* D+layerstack=stack8 r* G; q" Z; o( K* m/ h
+fsoptions=opt1$ [+ y" c4 B6 I0 A2 `
+rlgcfile=micro_diff_stripline.rlgc
' o& B6 j% T, S9 J& V5 m8 Z* ~4 K+outputformat=rlgcfile
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******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)*********# w9 J3 N) f. ]5 p4 ^+ {4 Z& K
+conductor=(shape=trace origin=(0mil,'dHeight1+dThickness') material=copper type=signal)4 h5 z' Y9 S+ N5 R
+conductor=(shape=trace origin=('dWidth+dGap','dThickness+dHeight1') material=copper type=signal)
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*******信号类型*******
8 p5 ?/ ? f. _9 k6 A lwtrace inP inN 0 outP outN 0 fsmodel=dstrip n=2 l=dLength
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. _2 x( {. A& ?1 v8 b' f& ^.tran 25ps 1ns* L5 Z/ j/ z. P u
.probe v(inp) v(inn)( m) t' l- u8 S0 m
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*******.LIN语句,导出s参数*******3 g4 S/ f& g% a0 f$ d5 w7 j
.LIN sparcalc=1 modelname=my_custom_model 7 G8 R1 X4 s4 U" }6 C: \7 j
+ filename=couple2line format=touchstone dataformat=db
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*******定义2个节点间的端口******: r) o" J1 G P7 X6 j. Y. v4 ?
P1 inP inN 0 dc=0 ac=0.84 port=1 z0=50$ F, R" J4 @. h/ m$ ]& M6 b/ d
P2 outP outN 0 dc=0 ac=0.84 port=2 z0=50
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, X. c" M% V8 T: h3 S.AC LIN 100001 1g 15G$ ]% a1 n* V, F5 u
9 A" X9 `7 g( M, V. i9 D.end
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微带差分线的s参数 从1g-15g |
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