微带线阶梯型阻抗变换器(50ohm到100ohm)设计with HFSS.doc

1已知介质基片厚度h=1mm、相对介电常数=4.4、工作频率=2.4GHz2计算得=1.912mm =1.012mm =0.442mm =17.572mm取=3mm 介质基片宽度=22mm3HFSS建模如下图仿真得到理想结果曲线时的模型的尺寸数据width of substrateheight of groundheight of substratewidth of the strip whose function is to convert the impedancelength of the strip whose function is to convert the impedanceheight of stripwidth of the strip whose impedance is 100 ohmlength of the strip whose impedance is 100 ohmlength of the strip whose impedance is 50 ohmwidth of the strip whose impedance is 50 ohmwidth of port4仿真结果仿真结果在下一页。仿真结果很好，但与后来网分仪的结果差别很大。不过从网分仪上看出此次所做的实物还是实现了在2.4GHz频率信号下做阻抗变换的功能，同时可观察到该器件在2.556GHz信号下效果最好。5制作的实物6网分仪结果7计算贴片尺寸所用的程序的代码#include#include#define PI 3.1415926void main()double c=300000000.0;double f0;double Z0,Er,h,LEN,Ee,t;double w,wz,A,B,bijiao;/不能写wwhile(1)printf(导带厚度t=(毫米);scanf(%lf,&t);printf(工作频率f0=(赫兹);scanf(%lf,&f0);printf(特性阻抗Z0=(欧姆);scanf(%lf,&Z0);printf(相对介电常数Er=);scanf(%lf,&Er);printf(介质基片厚度h=(毫米);scanf(%lf,&h);if(t=0.0)bijiao=44.0-2*Er;if(Z0bijiao)A=Z0*(sqrt(2.0*(Er+1)/119.9+(Er-1)*(log(PI/2.0)+(log(4.0/PI)/Er)/(2.0*Er+2.0);w=h/(exp(A)/8.0-1/(4.0*exp(A);Ee=(Er/2.0+1.0/2.0)/pow(1-(log(PI/2.0)+(log(4.0/PI)/Er)*(Er-1)/(2.0*A*(Er+1),2);if(Z0bijiao)A=Z0*(sqrt(2.0*(Er+1)/119.9+(Er-1)*(log(PI/2.0)+(log(4.0/PI)/Er)/(2.0*Er+2.0);Ee=(Er/2.0+1.0/2.0)/pow(1-(log(PI/2.0)+(log(4.0/PI)/Er)*(Er-1)/(2.0*A*(Er+1),2);wz=h/(exp(A)/8.0-1/(4.0*exp(A);if(wz(h/(2*PI)w=wz+(1+log(2*h/t)*t/PI;elsew=wz+(1+log(4*PI*wz/t)*t/PI;if(Z0(h/(2*PI)w=wz+(1+log(2*h/t)*t/PI;elsew=wz+(1+log(4*PI*wz/t)*t/PI;Ee=(Er+1)/2+(Er/2.0-1.0/2)*pow(1+10*h/w),(-0.555);LEN=c*1000/(4.0*f0*(sqrt(Ee);printf(导体宽度w=%lf毫米n,w);printf(等效介电常数Ee=%lfn,Ee);printf(导体长度LEN=%lf毫米n,LEN);printf(n);8一切经历都是财富我仿真完全是在用数据去试。改变任何一个数据，甚至是感觉无关的数据如、和边界尺寸，即使只改动0.1mm，也会有