381 PROJECT 1 - ELEC 381 Project Assignment 1...

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ELEC 381 Project Assignment 1 TengCheng(DA928240) Part A With, f c =419 MHz If , we can get: And the use Matlab to get the ratio by the two equations above, which is shown in fig.1: er= 4.35; xx=[0.01:0.001:0.99]; eff2=(er+1)/2+((er-1)/2)*((1+12./xx).^(-0.5)+0.04*(1-xx).^2); Z02= 60*log(8./xx+xx./4)./(sqrt(eff2)); figure(2) plot(xx,Z02, '-ro' , 'LineWidth' ,3, ... 'MarkerEdgeColor' , 'r' , ... 'MarkerFaceColor' , 'r' , ... 'MarkerSize' ,1.5) xlabel( 'w/h ratio' ); ylabel( 'Z0 (ohm)' ); title( 'Z0 and ratio of w/h<1 ' ); x0=eval(x0) Figure Z O2 and ratio of w/h<1 And then we can calculate that, use to find out the ratio of =0.39, and calculate w and: Use the equation Let 100MHz < f <700MHz, plot versus a function of f in Matlab, which is shown in Fig.2: f= 1 *10^8:1000:7*10^8; temp= tan(2*pi*f*0.1025./(1.732*10^8)); Zin= 104.9*(220+i*104.9*temp)./( 104.9+i*220*temp)
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tao= abs((Zin-50)./(Zin+50)); plot(f,tao, '-ro' , 'LineWidth' ,3, ... 'MarkerEdgeColor'
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381 PROJECT 1 - ELEC 381 Project Assignment 1...

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