|
本帖最后由 shark4685 于 2010-6-25 15:35 编辑 ) a3 J* r6 L6 g& B8 `/ H
; t) e) a: l: ^% J& ]6 @第四讲0 d0 Z b7 f+ y$ v; c; s& ]8 x
9 j8 |4 @1 B! G3 W' Y. J
2D场求借器--用来求传输线的s 参数等....5 Y0 J6 _5 ]* [6 g# R( |
----------------------------------------------------------------------网表如下:
2 W# b( A! H9 E8 Y*Micro Diff stripline
W, V$ e3 o% b2 w*Micro Diff stripline.sp : caluclate micro diff stripline's s parament&rlgc model[*.s4p&*.rlgc]
* [( }9 \/ O, `) \2 a R$ ?7 f1 r*created by Li Liming
2 R9 g+ p5 I, T* U/ a*****************************************************# M/ ?. b3 l( p$ @) U) Q
* Material ×××4 Q9 a+ I( J4 p! Z/ Y" w6 F2 G& Z
* Stack layer; o' M1 X/ {$ \; G7 z' i f
*//////////----dWidth--- dGap ---dWidth----//////////dThickness2 Y, I) {5 U9 x+ K2 M2 B
*////////////////////////////////////////////////////dHeight1+ o/ z) g- }" }8 p5 S5 p. A) ~
*----------------------------------------------------dThickness
) f8 Z$ t* d% ~/ _7 I" X( `******************************************************$ M; z1 a; o; l/ ^' U
! g3 \0 K# Y+ G.param dHeight1=9.84mil
5 k( u; B4 }$ a. [.param dWidth =10mil: ^" M4 v7 |4 G8 g5 ]9 l3 _
.param dGap =8mil
3 ?; p6 O" C( B2 W: ]7 q/ I.param dThickness=2.2mil
0 G, C- { o* A k+ e$ p- j6 `.param dLength=6000mil4 G' ~; h* }0 @
9 ^& Y; c2 ~2 [! Z. x: E' i+ o*******定义2种材料*******6 {) j% O( [* {9 S2 Q2 g7 I
.material die dielectric er=3.48 losstangent=0.0037
9 ?$ u& ~4 c3 Z.material copper metal conductivity=57.6meg
* E7 W+ {, [7 S+ V2 t& p. \( ^4 o+ N, l
*******定义走线的参数,如形状,长度,厚度******** H9 r" j, G- o( ?
.shape trace rectangle width=dWidth height=dThickness
; n0 h9 Z& N" F, v; V R i' Y& F/ E, R. ]& ?: o- Y# E
*******定义层叠, 注意层叠是从下往上的。*******$ j- t2 S! l2 p
.layerstack stack! u7 J2 j% N2 Z& b& }$ I
+layer=(copper,dThickness) layer=(die,dHeight1) ( \* Z) u, l; A5 R* F# g
1 U1 E+ N: Y9 R0 Z# J9 L3 ~
*******定义仿真精度,格点,输出数据,计算类型*******% J. Q! o6 D5 R: J0 q" q! `, c
.fsoptions opt1 printdata=yes computeg0=yes computegd=yes computer0=yes computers=yes
) G( v5 X% p1 {# N+ACCURACY = LOW GRIDFACTOR = 1" Z+ j& y. c4 ~" v; H* a+ e) @" g
5 \/ Z. q! H+ e2 Q5 p' ^
*******定义扫描过程*******
6 `/ a, X. D; M, M' ?7 t.model dstrip w modeltype=fieldsolver2 l3 X2 s: Q1 ^- s8 T
+layerstack=stack# O# i7 v" O5 i, I* y: x
+fsoptions=opt16 B/ d" f% ^/ `1 |! ^( p
+rlgcfile=micro_diff_stripline.rlgc8 H. A- `9 S1 j) u5 t. O
+outputformat=rlgcfile: m8 L+ u. Y/ D
& I: e! I. x# D" Q. {
******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)*********$ S( k1 C8 \% m [3 q
+conductor=(shape=trace origin=(0mil,'dHeight1+dThickness') material=copper type=signal)# s- r, b9 ^ J
+conductor=(shape=trace origin=('dWidth+dGap','dThickness+dHeight1') material=copper type=signal)- P+ l6 [& C# W+ I. S0 C
5 Q" R5 Q6 g$ K$ N& g/ Q
*******信号类型*******- }4 ]( t1 ~' h( r) K& g+ T
wtrace inP inN 0 outP outN 0 fsmodel=dstrip n=2 l=dLength
% ^0 d8 X4 e- w# V& [7 i/ [7 W1 @4 B8 C8 S6 f, j' k
.tran 25ps 1ns R9 m! G" G' C7 X
.probe v(inp) v(inn)
3 ]' H, W! K5 P$ |1 l! U X0 C5 ^4 u. ]) d6 y- q2 K# |+ `
*******.LIN语句,导出s参数*******9 Q- d' d: v3 h8 {8 G
.LIN sparcalc=1 modelname=my_custom_model
5 r; l, }* P: q5 _- A$ A+ filename=couple2line format=touchstone dataformat=db
% q Y$ B/ m/ t9 f+ [# t. k, \# B' l- I) }
*******定义2个节点间的端口******, _& D- H* ?- I: G
P1 inP inN 0 dc=0 ac=0.84 port=1 z0=507 W/ ^9 _$ `0 K* S2 r+ I! ~
P2 outP outN 0 dc=0 ac=0.84 port=2 z0=50
4 o: q( ]: Q+ K3 w* Z m0 Q& W! Z. k/ r/ G7 a& H8 j+ U# A! F/ e5 Q I
.AC LIN 100001 1g 15G
& r- D$ @, a+ e5 W* x% ^" j0 x0 O$ F. W: ?, h
.end
/ c5 D b. @1 n9 ?---------------------------------8 b" v% L5 J" s+ T& F
微带差分线的s参数 从1g-15g |
|