技術(shù)

學(xué)個(gè)Antenna：HFSS腳本建模入門(mén)

2022-01-10 來(lái)源：微波射頻網(wǎng) 作者：94巨蟹座少年字號(hào)：大中小

學(xué)個(gè)Antenna是以天線仿真和調(diào)試為主，理論原理為輔的干貨天線技術(shù)專欄，包括天線入門(mén)知識(shí)以及各類天線的原理簡(jiǎn)介、仿真軟件建模、設(shè)計(jì)、調(diào)試過(guò)程及思路。如有想看到的內(nèi)容或技術(shù)問(wèn)題，可以在文尾寫(xiě)下留言。

摘要：

HFSS作為高頻結(jié)構(gòu)設(shè)計(jì)的首選工具和行業(yè)標(biāo)準(zhǔn)，能從幾何結(jié)構(gòu)、材料特性到分析、控制及所有后處理進(jìn)行全參量化設(shè)計(jì)。可對(duì)于仿真設(shè)計(jì)相關(guān)的工程師來(lái)說(shuō)，利用HFSS軟件進(jìn)行3D可視化建模容易，但是后期的模型維護(hù)和傳閱卻難以為繼。

本文使用的電磁仿真軟件為ANSYS Electronics Desktop Version 2017.2.0

HFSS腳本錄制

下圖所示環(huán)形器的HFSS建模不難，但是工程師們建模習(xí)慣不同，最后各自的仿真模型在進(jìn)行傳閱時(shí)，其可讀性就難免參差不齊。有的喜歡預(yù)估好初始值后進(jìn)行純數(shù)字建模，有的喜歡variables和數(shù)字混用，即使是有些人采用全參量化建模，由于大家命名習(xí)慣大相徑庭，最終拿到別人的仿真文件進(jìn)行參數(shù)微調(diào)時(shí)，也會(huì)對(duì)模型的建立邏輯和某些結(jié)構(gòu)對(duì)應(yīng)的變量有所困惑。

特別是在別人已經(jīng)建立好的模型上進(jìn)行調(diào)試優(yōu)化時(shí)，面對(duì)“一磚一瓦”構(gòu)成的復(fù)雜結(jié)構(gòu)時(shí)，想通過(guò)Delete Last Operation操作來(lái)窺視開(kāi)發(fā)者的模型確實(shí)比較麻煩。

這里提供一種最簡(jiǎn)單的方法：HFSS自帶的Record Script To File功能進(jìn)行vbs腳本的錄制。可能大家聽(tīng)說(shuō)過(guò)這個(gè)功能，但是在實(shí)施過(guò)程中遇到一些困難。比如明明錄制好了，再次Run Script進(jìn)行重構(gòu)模型為什么報(bào)錯(cuò)呢？

如下圖所示，隨便建立一個(gè)文件進(jìn)行模型的繪制，對(duì)其進(jìn)行vbs腳本錄制：

Run Script后，HFSS軟件提示報(bào)錯(cuò)，很多人第一次使用這個(gè)可能都會(huì)遇到這種問(wèn)題。

其實(shí)只需要在錄制腳本前，軟件處于空文件狀態(tài)(Project Manager下無(wú)Project和Design)，這樣從零開(kāi)始錄制的腳本執(zhí)行起來(lái)就不會(huì)報(bào)錯(cuò)。

經(jīng)過(guò)上述操作后錄制的vbs代碼如下（可直接復(fù)制到txt文件里，將文件類型后綴改為.vbs，在HFSS軟件中的Tool->Run Script載入執(zhí)行即可）：

1 ' ----------------------------------------------

2 ' Script Recorded by ANSYS Electronics Desktop Version 2017.2.0

3 ' ----------------------------------------------

4 Dim oAnsoftApp

5 Dim oDesktop

6 Dim oProject

7 Dim oDesign

8 Dim oEditor

9 Dim oModule

10 Set oAnsoftApp = CreateObject("Ansoft.ElectronicsDesktop")

11 Set oDesktop = oAnsoftApp.GetAppDesktop()

12 oDesktop.RestoreWindow

13 Set oProject = oDesktop.NewProject

14 oProject.InsertDesign "HFSS", "HFSSDesign1", "DrivenModal", ""

15 Set oDesign = oProject.SetActiveDesign("HFSSDesign1")

16 Set oEditor = oDesign.SetActiveEditor("3D Modeler")

17 oEditor.CreateRegularPolyhedron Array("NAME:PolyhedronParameters", "XCenter:=", _

18 "-0.4mm", "YCenter:=", "-0.4mm", "ZCenter:=", "0mm", "XStart:=", "0.2mm", "YStart:=", _

19 "0.2mm", "ZStart:=", "0mm", "Height:=", "1.2mm", "NumSides:=", "12", "WhichAxis:=", _

20 "Z"), Array("NAME:Attributes", "Name:=", "RegularPolyhedron1", "Flags:=", "", "Color:=", _

21 "(143 175 143)", "Transparency:=", 0, "PartCoordinateSystem:=", "Global", "UDMId:=", _

22 "", "MaterialValue:=", "" & Chr(34) & "vacuum" & Chr(34) & "", "SurfaceMaterialValue:=", _

23 "" & Chr(34) & "" & Chr(34) & "", "SolveInside:=", true, "IsMaterialEditable:=", _

24 true, "UseMaterialAppearance:=", false)

25 oEditor.CreateCylinder Array("NAME:CylinderParameters", "XCenter:=", "0.8mm", "YCenter:=", _

26 "1.8mm", "ZCenter:=", "0mm", "Radius:=", "0.2mm", "Height:=", "1mm", "WhichAxis:=", _

27 "Z", "NumSides:=", "0"), Array("NAME:Attributes", "Name:=", "Cylinder1", "Flags:=", _

28 "", "Color:=", "(143 175 143)", "Transparency:=", 0, "PartCoordinateSystem:=", _

29 "Global", "UDMId:=", "", "MaterialValue:=", "" & Chr(34) & "vacuum" & Chr(34) & "", "SurfaceMaterialValue:=", _

30 "" & Chr(34) & "" & Chr(34) & "", "SolveInside:=", true, "IsMaterialEditable:=", _

31 true, "UseMaterialAppearance:=", false)

32 oEditor.CreateBox Array("NAME:BoxParameters", "XPosition:=", "0.6mm", "YPosition:=", _

33 "-2.6mm", "ZPosition:=", "0mm", "XSize:=", "0.8mm", "YSize:=", "0.4mm", "ZSize:=", _

34 "0.8mm"), Array("NAME:Attributes", "Name:=", "Box1", "Flags:=", "", "Color:=", _

35 "(143 175 143)", "Transparency:=", 0, "PartCoordinateSystem:=", "Global", "UDMId:=", _

36 "", "MaterialValue:=", "" & Chr(34) & "vacuum" & Chr(34) & "", "SurfaceMaterialValue:=", _

37 "" & Chr(34) & "" & Chr(34) & "", "SolveInside:=", true, "IsMaterialEditable:=", _

38 true, "UseMaterialAppearance:=", false)

39 oEditor.CreateCone Array("NAME:ConeParameters", "XCenter:=", "2.2mm", "YCenter:=", _

40 "-0.2mm", "ZCenter:=", "0mm", "WhichAxis:=", "Z", "Height:=", "0.6mm", "BottomRadius:=", _ 41"0.447213595499958mm", "TopRadius:=", "0.4mm"), Array("NAME:Attributes", "Name:=", _

42 "Cone1", "Flags:=", "", "Color:=", "(143 175 143)", "Transparency:=", 0, "PartCoordinateSystem:=", _

43 "Global", "UDMId:=", "", "MaterialValue:=", "" & Chr(34) & "vacuum" & Chr(34) & "", "SurfaceMaterialValue:=", _

44 "" & Chr(34) & "" & Chr(34) & "", "SolveInside:=", true, "IsMaterialEditable:=", _

45 true, "UseMaterialAppearance:=", false)

除了錄制建模的腳本，我們還可以進(jìn)行繁瑣的數(shù)據(jù)處理、導(dǎo)出步驟的錄制，如下面代碼就是為了實(shí)現(xiàn)S11和3D方向圖數(shù)據(jù)的一鍵式導(dǎo)出。

1 ' ----------------------------------------------'

2 Script Recorded by ANSYS Electronics Desktop Version 2017.2.0

3 ' ----------------------------------------------

4 Dim oAnsoftApp

5 Dim oDesktop

6 Dim oProject

7 Dim oDesign

8 Dim oEditor

9 Dim oModule

10 Set oAnsoftApp = CreateObject("Ansoft.ElectronicsDesktop")

11 Set oDesktop = oAnsoftApp.GetAppDesktop()

12 oDesktop.RestoreWindow

13 'dipole_simu：項(xiàng)目名稱 Project Name

14 Set oProject = oDesktop.SetActiveProject("dipole_simu")

15 'veeDipole_idealFeed1：設(shè)計(jì)名稱 Design Name

16 Set oDesign = oProject.SetActiveDesign("veeDipole_idealFeed1")

17 Set oModule = oDesign.GetModule("ReportSetup")

18 'oModule.ExportToFile "Results下的報(bào)告名稱", "csv保存路徑+csv文件名"

19 oModule.ExportToFile "S11", "C:/Users/Administrator/Desktop/S11.csv"

20 oModule.ExportToFile "Gain Plot 1", _

21 "C:/Users/Administrator/Desktop/Gain Plot 1.csv"

22

HFSS API腳本化建模
前文已經(jīng)介紹了如何錄制腳本，便于模型的重建和數(shù)據(jù)的導(dǎo)出。但是對(duì)方收到vbs文件后，要進(jìn)行模型的修改，沒(méi)有注釋其實(shí)看起來(lái)也是一團(tuán)糟的。雖然可以通過(guò)多次刪除部分vbs代碼一步步回構(gòu)到自己想要的節(jié)點(diǎn)，不過(guò)這種方法也是有點(diǎn)麻煩。

幸運(yùn)的是，matlab調(diào)用hfss的這項(xiàng)工程早已在Github上模塊化并開(kāi)源了。