double stub matching using smith chart matlab code

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TEJASHREE PATIL
TEJASHREE PATIL 2016-12-10
编辑： Muhammad 2022-12-6
A 75 ohm air filled coaxial line is terminated with a complex load of 109.5-j120 ohms. Design a double stub matching system using short coaxial lines of characteristics impedance 75 ohm.

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Muhammad
Muhammad 2022-12-6
编辑：Muhammad 2022-12-6
%% *DOUBLE STUB MATCHING ON TRANSMISSION LINE*
g = real(YL_t);
b = imag(YL_t);
ld = 0:lambda/100:lambda/2;
b2 = (cos(beta*ld)/sin(beta*ld)) + (1/(g^1/2)*sin(beta*ld)) - 1;
b1 = (b2.*b2.*sin(beta*ld).*cos(beta*ld) - b2.*((cos(beta*ld).*cos(beta*ld))-((sin(beta*ld)).*(sin(beta*ld)))) - (b./g))/1 - 2.*b2.*sin(beta*l).*cos(beta*l)+(b2.*sin(beta*ld).*b2.*sin(beta*ld));
%Part1:legth of stub2
if (b1<=0)
lb = (atan(-1./b1))/2*pi
else
lb = (pi*atan(-1./b1))/2*pi
end
%Part2:length of stub1
if (b2<=0)
la = (atan(-1./b2))/2*pi
else
la = (pi+atan(-1./b2))/2*pi
end

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