1 clear;clc; 2 %参数输入 3 Z0=50;ZL=100;%Z0:输入的参考阻抗,ZL:负载阻抗 4 lambda=300/3;%自定义工作频率下限的波长:mm 5 L=50;%渐变传输线的长度:mm 6 L0=linspace(0,L,251);tot_num=length(L0); 7 dL=L0(2)-L0(1);%离散化的传输线,每节的长度 8 %指数渐变传输线 9 a=1/L*log(ZL/Z0); 10 Z=Z0*exp(a*L0); 11 plot(L0,Z);%获取m文件当前路径 13p1=mfilename('fullpath'); 14 i=findstr(p1,'\'); 15 p1=p1(1:i(end)); 16 pp=strcat(p1,'hfssapi'); 17 %与m文件同级的文件夹中的hfssapi加入到路径中 18 addpath([pp '/3dmodeler']); 19 addpath([pp '/general']); 20 addpath([pp '/analysis']); 21 addpath([pp '/boundary/']); 22 %vbs脚本路径 23 tmpScriptFile = 'C:\Users\Dell\Desktop\exp_transmissionLine.vbs'; 24 %计算微带线的线宽:mm 25 Er=2.2;H=0.508;Wcal=zeros(1,tot_num); 26 for num=1:tot_num 27 zcal=Z(num); 28 Wcal(num)=microstrip_Zcal(Er,H,zcal); 29 End 30 31 %vbs脚本建模:此处引用hfssapi为自己修改过后的,参数传入有差异; 32 %不可直接复制运行,当作伪代码,仅供参考 33 %建立HFSS模型文件. 34 fid = fopen(tmpScriptFile, 'wt'); 35 % 建立一个新的HFSS project和design. 36 hfssNewProject(fid); 37 hfssInsertDesign(fid, 'gradually_changed_tri_transmissionLine'); 38 % 创建新的Polyline 39 Points=zeros(2*tot_num,3); 40 for num=1:tot_num 41 Points(num,1:3)=[-Wcal(num)/2,(num-1)*dL,0]; 42 End 43 Points((tot_num+1):end,1)=abs(flipud(Points(1:tot_num,1))); 44 Points((tot_num+1):end,2)=flipud(Points(1:tot_num,2)); 45 Points((tot_num+1):end,3)=flipud(Points(1:tot_num,3)); 46 hfssPolyline(fid, 'exp_transmissionLine', Points, 'mm', 1, 'Line', [255, 255, 0],0) 47 hfssSetColor(fid, 'exp_transmissionLine', [255,255,0]); 48 hfssSetTransparency(fid, {'exp_transmissionLine'}, 0); 49 hfssAssignPE(fid, 'Line', {'exp_transmissionLine'}); 50 51 % Create the substrate 52 hfssBox(fid, 'substrate',[-40/2,0,0],[40,L,-H],'mm',1); 53 hfssAssignMaterial(fid, 'substrate', 'Rogers RT/duroid 5880 (tm)'); 54 hfssSetTransparency(fid, {'substrate'}, 0.2); 55 56 % Create the ground 57 hfssRectangle(fid, 'GroundPlane', 'Z', [-40/2,0,-H],40,L, 'mm',1); 58 hfssSetColor(fid, 'GroundPlane', [192, 192, 192]); 59 hfssSetTransparency(fid, {'GroundPlane'}, 0.4); 60 hfssAssignPE(fid, 'PerfE_Ground', {'GroundPlane'}); 61 62 %------------空气盒------------% 63 hfssBox(fid, 'AirBox', [-40/2-lambda/4,0,-H-lambda/4],[40+lambda/2, L, H+lambda/2], 'mm',1); 64 hfssSetTransparency(fid, {'AirBox'}, 0.9); 65 hfssAssignRadiation(fid, 'Rad1', 'AirBox'); 66 %-----------设置端口---------------% 67 hfssRectangle(fid, 'waveport1', 'Y', [-Wcal(1)*6/2,0,-H],5*H,Wcal(1)*6, 'mm',1); 68 hfssRectangle(fid, 'waveport2', 'Y', [-Wcal(end)*6/2,L,-H],5*H,Wcal(end)*6, 'mm',1); 69 hfssSetColor(fid, 'waveport1', [255, 0, 0]); hfssSetColor(fid, 'waveport2', [255, 0, 0]); 70 hfssAssignWavePort(fid, 'Port1', 'waveport1', 1, false, [0,0,-H], [0,L,-H], 'mm'); 71 hfssAssignWavePort(fid, 'Port2', 'waveport2', 1, false, [0,0,0], [0,L,0], 'mm'); 72 %-----------改变积分终点--------------% 73 hfssInsertSolution(fid, 'Setup3000MHz', 3, 0.02, 15); 74 hfssInterpolatingSweep(fid, 'Sweep3to10GHz', 'Setup3000MHz',3, 10,351); 75 76 % Close the HFSS Script File. 77 fclose(fid); 78 79 function W=microstrip_Zcal(Er,H,Z0) 80 %Unit:mm,GHz,ohm 81 %计算中间变量 82 A=Z0/60*sqrt((Er+1)/2)+(Er-1)/(Er+1)*(0.23+0.11/Er); 83 B=377*pi/(2*Z0*sqrt(Er)); 84 W_d_A=8*exp(A)/(exp(2*A)-2); 85 W_d_B=2/pi*(B-1-log(2*B-1)+(Er-1)/(2*Er)*(log(B-1)+0.39-0.61/Er)); 86 if(W_d_A<2) 87 W_d=W_d_A; 88 else 89 W_d=W_d_B; 90 end 91 %计算微带线宽度 92 W=W_d*H;93 end |