CST仿真技术交流docx.docx
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CST仿真技术交流docx.docx
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CST仿真技术交流docx
CST仿真技术交流
内容
2.基本参数设置
4•仿真结果观察
一、CST基本应用(入门)
1・仿真流程
3.建模
5•实例介绍
CST仿真基本技巧(熟练应用)
1•模型参数化
3•端口设置
5.场监视器设置
7•仿真器参数设置
2•频率范围设置
4.边界条件设置
6.网格设置
8.参数扫描
9•后处理10•双极化天线交叉极化处理
三、CST高级应用探讨(仅供讨论)
1・近场分析和探针应用
2•网络参数提取
3•软件间结构模型互导
4•宏应用
>CST基本应用一一仿真流程
>单位设置
>背景材料设置
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边界条件
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-Labeling
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1.CST2006支持仿真模型全程参数化,即包括结构尺寸、频率范围、端口位置、网格参数等所有数量型参数均可定义参数;
2可先定义参数名称后赋值,亦可建模过程中随时定义参数;
3.支持由参数构成的所有初等函数表达式;
4.所有参数均可参数扫描。
Name
Value
Description
▲
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0
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130
gapdistancebetweenunits
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Hin_notch
0
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37
heightofinnersideplane
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20
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Hout^notch
0
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37
heighto£oiitwrsideplane
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\Global/
1.CST默认时域信号为高斯脉冲,其频率响应亦为高斯函数;
2.对于时域求解器,频率范围的设置与仿真消耗时间有较大关系:
通常,最咼频率决定最小网格步长和最小迭代时间步长,频率越高,最小网格步长越短,迭代时间步长越短,仿真时间越长;频带越窄,输入时域脉冲越长,时域迭代步数越多,仿真时间越长
3.频率范围不宜过宽(可能影响S参数的精度,容易起波纹),亦不能过窄(导致计算时间过长)
】、CST基本技巧一一端口设置
波导端口VS•离散端口
1.波导端口面必须平行于坐标轴,离散端口起点和终点任意,但必须沿网格;
2.波导端口参考阻抗为波导端面特征阻抗,且其相位参考面吋平移;离散端口分为电压/电流源和S参数源,S参数源特征阻抗可任意设置,但相位参考面不可平移(deembeding);
】、CST基本技巧一一边界条件
周期边界(Periodic)对称面一一场对称分布
开放边界(Open)
辐射边界(OpenandSpace)
理想电壁(PE)
理想磁壁(PM)
UnitCell
Labeling
Name:
rType
〔、CST基本技巧一一场监视器设置
E-Field
两Automaticlabeling
Specification
RFrequency
H-Field/Surfacecurrent
Powerflow
Fmin:
Currentdensity
Powerlossdensity/(5AR)
Electricenergydensity
Magneticenergydensity
Farfield/RCS
Fmax:
「Time
Frequency:
2DPlane
厂Activate
Orientation:
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Position:
Cancel
Help
电场分布
表面电流分布/磁场分布
远场方向图
自定义二维平面场分布
Meshsummary
州irt.meshstep:
NX!
|o.610408
1436
Max.meshstep:
Ny:
|9.52316
1內n
Meshcells:
Ns:
|1127520
|37
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Meshtype
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厂Uselocaledgerefinementfactor;
■Uselocalvolumerefinementfactor:
Dx:
Extendxrange
p-
Extendyrange
cT
Extendzrange
Is
全局网格设置
局部网格设置
〔、CST基本技巧一一求解器设置
2d
5olversettings
Accuracy:
Start
收敛精度条件
遗留在计算区域能量
-30
刁de
厂Storeresultdatainc-ache
Optimize...
Par.Sweep..,
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端口同时激励
阵列仿真
vs.CombineResults
迭代
S参数精确仿真
rAdaptivemeshrefinement
RAdaptiverneshrefinement
AdaptiveProperties...|
Networkcomputing
厂Networkcomputing
对称S参数
节省阵列仿真时间
Par-ameterSweep
pSequences
】、CST基本技巧一一参数扫描
Resultwatch
2d
□Sequ皂nee1
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1.每个Sequence之间依次独立计算;
2.一个Sequence中多个参数则交叉组合计算
3•必须预设好后处理模板,参数扫描后仅保存预设的观察结果
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厂Usenetworkcomputing
CheckStartIViewLogfile.・•
Help
Progressofparametersweep
100
EvaluateAll
Close
Help
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Settingm…|Delete|Duplicate:
|Evaluate|千|丨|DeleteAll
Resultname
Templatename
1
2
3
4
5
6
7
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Directivity
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phi1710
Thetaphase1710phiphase1710
Farfield(broadband)
F^rfield(broadband)
Rar能Id(broadband)
Fairfield(singlefrq)
FarfieId(singlefrq)
F^rfield(singkfrq)
Farfield(singlefrqJ▼
1.1DResults能提取单频辐射方向图、宽频辐射参数、S参数、驻波比等曲线;也能将已有多个1DResults运算组合;
2.ODResults能提取S参数、辐射参数中的单点数值
翟IDFarFieldPlot
rFarfieldMonitorandExcitation
ExcitationString:
|[arrap]
rCutplane
VaryingAngle
FixedAngle
PThetarPhi
Theta:
|30
Stepsizs:
|1deg
Phi:
|30
OK
Cancel
f^MixIdResults
EnterExpress!
on,e.g.sin(2zsqr(A))/exp(3^B)
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3
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Refer©nceDkGnce:
m
<•linearClog(dBJ厂NearfielddBUnits:
|dBV/rnzdBA/mzdBW2m2jj
OK
Cancel
分别提取E-field中Theta和Phi
分量的幅度和相位
将分量幅度相位曲线组合运算构成主极化和交叉极化
通过预设探针可以获得近场某些点处场强大小
理过近场分析为远场方向图、近场耦合等提供设计思路
电路参数仿真,可直接导出snp文件通过microwaveoffice优化仿真,亦对直接应用CST的集成仿真环境进行优化仿真
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1IDResults勻2D/3DResults□-€3E-Field
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通用模型格式.SAT
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CST能直接导入Pro/E模型
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充分应用内置宏
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BroadbandFarFieldMonitors
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FarfieldSlantPolarization
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Solver
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Touchstone+SPICEWizard
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