1、实验二：源程序：（1）绘制带状线特性阻抗曲线%带状线的特性阻抗曲线%t/b分别取0,0.1,0.2,0.3,0.4时z随wb的变化曲线clear all;wb=linspace(0.1,4,80) %为t/b0时使用wb1=linspace(0.1,0.35,5); %该参量在t/b=0、w/b0.35使用%导带厚度t为0时的阻抗z01=30*pi./(wb1-(0.35-wb1).2+0.441);%w/b0.35x=0.1; %t/b=0.1时n=2/(1+(2*x/3)/(1-x); %wb从0.1到4y=(x/(pi*(1-x)*(1-0.5*log(x/(2-x)2+0.0796./
2、(wb/x+1.1).n);m=y+wb/(1-x);c=8/pi*1./m;Z1=30*log(1+c/2.*(c+sqrt(c.*c+6.27);x=0.2; %t/b=0.2时n=2/(1+(2*x/3)/(1-x); %wb从0.1到4y=(x/(pi*(1-x)*(1-0.5*log(x/(2-x)2+0.0796./(wb/x+1.1).n);m=y+wb/(1-x);c=8/pi*1./m;Z2=30*log(1+c/2.*(c+sqrt(c.*c+6.27);x=0.3; %t/b=0.3时n=2/(1+(2*x/3)/(1-x); %wb从0.1到4y=(x/(pi*(1-x
3、)*(1-0.5*log(x/(2-x)2+0.0796./(wb/x+1.1).n);m=y+wb/(1-x);c=8/pi*1./m;Z3=30*log(1+c/2.*(c+sqrt(c.*c+6.27);x=0.4; %t/b=0.4时n=2/(1+(2*x/3)/(1-x); %wb从0.1到4y=(x/(pi*(1-x)*(1-0.5*log(x/(2-x)2+0.0796./(wb/x+1.1).n);m=y+wb/(1-x); c=8/pi*1./m;Z4=30*log(1+c/2.*(c+sqrt(c.*c+6.27); semilogy(wb1,z01,-,wb2,z02,-
4、.,wb,Z1,-g,wb,Z2,-r,wb,Z3,-y,wb,Z4,-m) %在同一幅图上绘制多条曲线legend(t=0且w/b0.35,t/b=0.1,t/b=0.2,t/b=0.3,t/b=0.4)axis(0.1 4 10 220)xlabel(w/b);ylabel(Z0*sqrt(Er);title(带状线特性阻抗变化曲线);grid on;图形：0.5 1 1.5 2 2.5 3 3.5 4101102w/bZ0*sqrt(Er)且且且且且且且且且且且t=0且w/b0.35t/b=0.1t/b=0.2t/b=0.3t/b=0.4（2）绘制微带线的特性曲线（2）、x1=0:0.0
5、1:100;if x1=1Z1=59.952*log(8./x1+x1./4);elseZ1=(119.904*pi)./(x1+2.42-0.44./x1+(1-1./x1).6);ende1=(1+1)/2+(1-1)/2*(1+12./x1).(-1/2);Z01=Z1./sqrt(e1);plot(x1,Z01);xlabel(w/h);ylabel(Z0);grid on;hold on;x2=0:0.01:100;if x2=1Z2=59.952*log(8./x2+x2./4);else Z2=(119.904*pi)./(x2+2.42-0.44./x2+(1-1./x2).6
6、);ende2=(2.55+1)/2+(2.55-1)/2*(1+12./x2).(-1/2);Z02=Z2./sqrt(e2);plot(x2,Z02);grid on;hold on;x3=0:0.01:100;if x3=1Z3=59.952*log(8./x3+x3./4);else Z3=(119.904*pi)./(x3+2.42-0.44./x3+(1-1./x3).6);ende3=(4.8+1)/2+(4.8-1)/2*(1+12./x3).(-1/2);Z03=Z3./sqrt(e3);plot(x3,Z03);grid on;hold on;x4=0:0.01:100;i
7、f x4=1Z4=59.952*log(8./x4+x4./4);else Z4=(119.904*pi)./(x4+2.42-0.44./x4+(1-1./x4).6);ende4=(9.6+1)/2+(9.6-1)/2*(1+12./x4).(-1/2);Z04=Z4./sqrt(e4);plot(x4,Z04);grid on;hold on;x5=0:0.01:100;if x5=1Z5=59.952*log(8./x5+x5./4);else Z5=(119.904*pi)./(x5+2.42-0.44./x5+(1-1./x5).6);ende5=(12.3+1)/2+(12.3-
8、1)/2*(1+12./x5).(-1/2);Z05=Z5./sqrt(e5);plot(x5,Z05);grid on;hold on;0 10 20 30 40 50 60 70 80 90 100020406080100120140160w/hZ0实验三 (1)Er=2.1、b=5mm，t=0.25mm，w=2mm的带状线由上图读出：特性阻抗impedance：68.4792。(2)g/4的微带线电长度为90deg（度），电介质选择Alumina(氧化铝),频率改为6GHz，介质厚度1mm读出：特性阻抗是50时，导带宽度为1.00524mm，长度为4.80126mm；特性阻抗是20时，导
9、带宽度为4.388mm，长度为4.38923 mm；特性阻抗是100时，导带宽度为0.143016 mm，长度为5.09487 mm；4、F=3ghzF=6ghzF=12ghz（5）W/mm S/mm B/mm T/mm工作频率/GHz介质及其相对介电常数奇模特性阻抗/偶模特性阻抗/奇模有效介电常数偶模有效介电常数3 0.5 2 0.035 6 2.16 50.4435 97.0649 1.63803 1.907363 0.8 2 0.035 6 2.16 54.8761 94.7694 1.64928 1.909563 0.8 2 0.035 6 12.9 26.0969 43.4399 8.4242 11.18913 0.8 2 0.035 2 12.9 25.6072 40.5506 7.67395 10.2344表2.耦合微带线
