clear all;er=2.2;d=0.787;for w=0:0.005:3 ee=((er+1)/2)+((er-1)/2).*(1/sqrt(1+((12*d)/w))) if((w/d)1) z0=(120*pi)/((sqrt(ee)).*(w/d)+1.393+0.667.*(log((w/d)+1.444)/log(2))) end;end; plot((w/d),z0) xlabel('(w/d) ratio'); ylabel('Impedance z0'); title('Variation of z0 with the value of (w/d)'); axis([1,4,30,100]); hold on; grid on;end;