CST 仿真色散曲线

【实例简介】
详细介绍周期性结构的色散曲线仿真，基于CST，但HFSS设置基本相同
smr.razavizadeh @ieee.org Dispersion diagram: CST Microwave Studio flow and Pierce Impedance can be seen in the folder ID Resulls In parameter sweep window, select"Edit" to view or modify the source code taex0e-red wacc 0r parameter sweep He, inrTtring <lrr uat Result match 二he水 A-c result of a perameter sweep of the rhese between the periodic bourdery-wall. :: pOwer =l0w, axa. electIc -LEld amol1-ud Start It ig recommeded to perform a aweer with phaae atena tEgel New seg. Dete Fig. 5 the user-defined vba codes of the important reports of the simulation as dispersion curve, phase group velocity and pierce impedance But I preferred that the following method for setting the dispersion diagram Post processing: The dispersion diagram, which is a graph based on"frequency"VS spatial phase variations of the predefined parameter of phase", could obtained by the following step by step process 1)Recall the tbp and choose the 2D and 3D Field Results>3D Eigenmode result 学[p水P中n Temp ate Based Postprocessing General Resuts Geneal Res Its 30FmR(3) aD and 2) Fald Souto Result Temo Manage Ac 3n FigenmxdrR Resut name Type Template nane Fequency equency Mode alare Integation R mge 00 A Eval=Le A VIno renge crider o :r y icty bexa-lnotused Setings. DeeteCuplcate Evauace i Daete Al EralLate All Lancel Hap Lotte. □oco9Hp Fig. 6 the outline of defining the postprocessing setup of dispersion plot in CSt MWS 2) For obtaining the dispersion data of the modes start one by one from the first mode, then after finishing simulation operation export the data in"Lxi format(available in "Table folder in Navigation tree) for our future postprocessing in Matlab environment 3)Evaluate Solver Setup Whenever the Eigenmode Solveris started, a specific number of the lowest resonance frequencies of the structure are calculated. Since only the fundamental mode is of interest, the number of modes is reduced to"I'", and the JDM eigenmode solver is chosen, which is faster for e given cxample smr. razavizadeh @ieee. org Dispersion diagram: CST Microwave Studio 上 enmod= Solver parameters Mesh type(1) Hexahedral mesh JDM Choose number of modes tomatically(0….1CG2) o Frequencies above Simplify Model. F Store all result data in cache F Calculate externa Q-facior □ Consider Adaptive mesh refinement D Adaptive meshrefinement Properties Fig 7 Eigenmode Solver setting for calculating the dispersion characteristics of the proposed periodic structure After the parameter sweep has been selected from the Eigenmode Solver's dialog, a new sequence is added, and the parameter "phase" is chosen to be swept from 0 to 180 degrees in 19 steps for an equal ster daimler Sequences Result wach Check -l sequence 1 Userdefined Start Parameter Sweep Paramete Resi lt TemplatE Name:pnase Acceration,u. V SwEep 180 ew Par. Edit… Fig 8 Parametric sweep setup for pha parameter of"pha the Start. If you set lower sweep limit at zero, the machine temporary would interrupt the process and alert we the parameter is zero, dont care about it and click Ok to continue the operation ≈ rometer Phese Fig10 4 smr.razavizadeh @ieee.org Dispersion diagram: CST Microwave Studio Results During the run process the real time dispersion results is accessible from the Table folder, as plot based on frequency vs phase parameter, as following Freyuellcy(Mude 1) A Anchor Pants F Excitaior Signas 0 4k Volage and Curer Monitors 20 I Mash Corro ldse Tables(or Results \Frequency(Mode 1) Parameter View Kjh LA 2D/3D R:suts 层 TLM Res_ts Paraneter LIst I:/value Descrnigtid Tvpe helix2cst 8 numbe of None 回68% A Fequercv Mede 1) Leng.h Eigenmode Aralysis Solver setup ( /21 Langh 9%[x[n画 Undefined 冫hei2* Propagation Cons ant beza/m 路凵 unwed Veneris Mode 1 Votage and Cument Monit=rs 0.511.522.533.544.555.5 SD Schenafc 1D Result Dispersion Dagan Wode 1x Parameter View Bs N:Value Deaciotiof Trpe-Reheixzct 修 TLM Resuts 回7%区x s Table phaee.50 phase ahM None igenmoce Analysis: Salver setup(2/2. Fmquenry Moda 1) 9%×[町A31 Undcfndd essages Progress Fig. ll The dispersion diagram based on(a) TBP result template, and (b)vba userdefined As shown in Fig. Il, all the data are the same but in Fig. I l(a) the horizontal axis is the phase Export the data of the mode "1 ResH Yev 1) Plot Praperties. Pbt type: Abscissa Crve set parameter: Table Properties ProPerties. Parameter sele-ted vaue Copy vicwto Clipbord Copy Ctrl+C E TLN Fests OBject nformation E Apy Haaieiei scluys lu all LumiA iLle abl=s U29pupu烂 ADot CanceSmthchart.Ccrcex. To Currert smr. razavizadeh @ieee. org Dispersion diagram: CST Microwave Studio S Export Plot Data varc n. OIL H File rame. Save Save as type: Datatiles(ht) Cancel Model Fig. 12 extraction of table dispersion data Open via excel Open a new Excel file and open from it your txt file of"Model. txt: 一 Import Wirord deploy The Text wizard has detemned thet your deta is Fxee width If tr s is conect. choose Nect, cr coos the data t/pa that best desaias you data ECpe b比HNW, t Libres I heal startimortat row:1 a Fle ncn: 437: CE4Jntad states Preview c fle D: wyLactreEoftwere CSTCST Exaroie ExEmples'M1520 L3 Bo2m. Model.txt 心 Homego ACcepter u 1,291184T 30,8823s941175 filename Wod 1 Opm CAncel cm[x>E一 w jak fael disko te cesred pceibon, eric ales to numbes, date values to dates, and al 由peve Daa peview general or圜x测E 「[x Anch 1phase Frequency(Model) 20 3017493257 t 2.277299584 plase pitch rI 2.77565101 B025820 8b0324/9y 2.0u2 3.70603251 20 1080 B302082.22.72 90 4.587840349 880268224.150516 141205.8897564 151306.320955161 8.069113773 edel 20 8460836229 p Model/t smr. razavizadeh @ieee. org Dispersion diagram: CST Microwave Studio py cr the ●●“ buenmede,TET+Sicw Ws Organie. Aewfolcer dHl Eel wrwk. Nusic Exel Maao-Lnable 围vdea mecro-enabled file fc nclis Ho regroUp dy DATA D] pE h a topr of the workbook as t PF o save as type Omer Formats lags Add a tag box to selct trom 日4时 fgt Hide Folde To□ SeveRance Fig, 13 The preparation of the dispersion text data file for producing the compatible * .csv file We should keep just the phase and value column and eliminate others, then edit the title of the value column as Frequency(Model), finally save as a Csv file format, as shown in Fig. 13. We should repeat the simulation for remained modes frequencies as presented in Fig. 14, and extract the favorite data for updating the previous"model. csv?"data file Reault woth Solve se: tings Template Based Postprocessing Method: DM dAnd 3D Rel beans Modes velAte. thoose number of modes automatically (Dm 10 CHe Resa nere (2) Resut aus. Adaotive mesh refirement (3) Volage Integretion nange Setings Delete Dupicae Evaluate 0B[ Sensitity amalysis 口 Lse sensivity anays Prcoertes ICK [Cancel][Help CRawPore Logie Fig. 15 How we can update the calculation for the higher mode Lumet Paye aytuL Formulas Dale Review Deveiuyi 回△征围,A styler omat,∠ Anent Nunber p Frequency( Model) Frequen y Mode2) Frequency mode) Frecuency Mod 9.34143:868 995375169178234 9963519510208190 A洲6210 610 110587601123877811190531271 1146129 2508587 3.0c02519 415051Ca2 16.34m13432 02155327616176 74262002 e9,1773165 7849.381365312 191780691173 8,96301 8Z866035 x1908 e9,2748604 Fig. 16 all the dispersion data gathered in one csv file for plotting the final dispersion diagram for first forth modes of the proposed 1 D-periodic structure smr. razavizadeh @ieee. org Dispersion diagram: CST Microwave Studio Mtalab Code for plotting the dispersion diagram For publishing all of your plot result, especially in ieEE publications, we should import our data into matlab environment, as a perfect engineering tool to sketch various plots in a unique plot in a high resolution view. Here we present a brief quick guide about it IRun matlab FilsFdit Dehug Paral el Desktop Wir dcw Help 口|品噜岿。都的目|0|D:0ae02u. WS TwoEllipseArr Shortcuts Howto Acd What's New ■nx NameEmpot cata]Value Mir Max 2)import the dispersion csv file Lock in: Sow Wave errs●5 w of D: Myl ecture, Sattwere CST CST Trample, Examp\MwS 2013\EIgen mode\ ETslaw Wave\ Dispe:sian.cn 10,5.C2136311113: 191533 415051194x15349 20,5.B8的9375,t0.99458s2,19.2E214379 2 Fie: of brpe: Rocourized D*a Fles 4)disable the header and text box a小6的命 DHdPapur:0I\LFMSTvcBlpaAnylnt aimfaratr,Meats:出 deFiles o Create variables matching preview u2Hwtd出W O Create vectors from each co l m n uan g column 回包必AL o Create vectors ftom each row using aw names Ianahles ir D: My rcurelSotwarr lSTsCST-FiamplrFxamp exMwSa1 Figenmnd-t TE Slow Wve niprrsior c )Run the plot m file(see the appendix) FleEdit Tent Ge Cell Tosk De ug Desktop WrdowHelp 国|%电7c|曰·幽←中问则·曾龟k1- |-1+11x游以 : recuenco lode. I fRequenc了oael Ix,7,'GEee1 gTend'' Mocel,Irde21ods3', 1od=3 smr.razavizadeh @ieee.org Dispersion diagram: CST Microwave Studio na resu 20 Mode 1 18 Mode2 16 Mode3 下14 Mode4 TE 12 10 BAND GAP LL 6 RL 20406080100120140160180 Phase(Deg Fig. the final sketch of the dispersion diagram obtained by a matlab plotting program(Appendix) smr. razavizadeh @ieee. org Dispersion diagram: CST Microwave Studio Example2 2D-periodic structure dispersion diagram In this section, dispersion characterization of surface waves propagating on a mushroom-like periodic structure is investigated using CST MWS Mushroom-like Ebg structures Wavenumber k is an important parameter to describe the propagation property of electromagnetic waves In a lossless case, the phase constant is B=k Usually, B is a function of frequency o. Once the phase constant is obtained, the phase velocity (vp) and group velocity(vg) can be derived nd v dB Furthermore. the field distribution can also be determined such as the field variation in a transverse direction. For a plane wave in free space, the relation between B and w is a linear function 6(0)=k=0yoE (2-2) For surface waves propagating in an EBG structure, it is usually difficult to give an explicit expression for the wavenumber k. One has to either solve an eigen-value equation or perform a full wave simulation to determine the wavenumber. It is important to point out that the solution of an eigen-value equation may not be unique. In another words, there may exist several different propagation constants at the same frequency. Each one is known as a specific mode with its own phase velocity, group velocity, and field distribution. The relation between B and o is often plotted out and referred to as the dispersion diagram For a periodic structure such as the EBG, the field distribution of a surface wave is also periodic with a proper phase delay determined by the wavenumber k (orB) and periodicity p Thus, each surface wave mode can be decomposed into an infinite series of space harmonic waves E(x,y,)=∑+(y,2)e-1nx,月n(a)=B2(a)+n Here, we assume the periodic and propagation direction is the x direction. Although these space harmonics have different phase velocities, they share the same group velocity. Furthermore, these space harmonics cannot exist individually because each single harmonic does not satisfy the boundary conditions of the periodic structure. Only their summation satisfies the boundary conditions. Thus, they are considered to be the same mode 【实例截图】
【核心代码】