initial commit / add all books

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diff --git a/2863/CH6/EX6.1/ex6_1.sce b/2863/CH6/EX6.1/ex6_1.sce
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+//chapter 6

+//horn antenna

+printf("\n");

+Ae=10;

+del=0.2;

+p=Ae^2/(8*del);

+del1=0.375;

+Thetae=2*atan((Ae/(2*p)))*180/(%pi);//flare angle

+Thetah=2*acos(p/(p+del1))*180/(%pi);

+Ah=2*p*tan(((Thetah*(%pi)/180)/2));

+printf(" the length is %gm",p);

+printf("\n the angle ThetaE is %g degree",Thetae);

+printf("\n the angle ThetaH is %g degree",Thetah);

+printf("\n the H plane aperture is %g",Ah);

+HPBWH=67/Ah;

+HPBWE=56/Ae;

+Ddb=10*log10((7.5*Ae*Ah));

+printf("\n the HPBWE is %g degree",HPBWE);

+printf("\n the HPBWH is %g degree",HPBWH);

+printf("\n the Directive gain in db is %gdb",Ddb);