initial commit / add all books

2 files changed, 22 insertions, 0 deletions

diff --git a/339/CH2/EX2.8/ex2_8.JPG b/339/CH2/EX2.8/ex2_8.JPG
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+++ b/339/CH2/EX2.8/ex2_8.JPG
diff --git a/339/CH2/EX2.8/ex2_8.sce b/339/CH2/EX2.8/ex2_8.sce
new file mode 100755
index 000000000..7800ec23f
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+ZL=25; //input impedance

+Z0=50; //characteristic impedance

+epsilonr=4;

+dp=0.001;

+f0=500e6;

+mu0=4*%pi*1e-7;

+epsilon0=8.85e-12;

+Zline=sqrt(Z0*ZL); //line impedance

+w=dp/Zline*sqrt(mu0/epsilon0/epsilonr);

+L=mu0*dp/w;  //inductance

+C=epsilon0*epsilonr*w/dp;  //capacitance

+vp=1/sqrt(L*C);   //phase velocity

+Z0=sqrt(L/C);

+d=1/(4*f0*sqrt(L*C));

+N=100;

+f=2e9*(0:N)/N;

+betta=2*%pi*f/vp;

+Z=Zline*((ZL+%i*Zline*tan(betta*d))./(Zline+%i*ZL*tan(betta*d)));

+plot(f/1e9,real(Z));

+title('Input impedance of the quarter-wave transformer');

+xlabel('Frequency {\itf}, GHz');

+ylabel('Input impedance |Z_{in}|, {\Omega}');
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