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diff --git a/2863/CH2/EX2.2/ex2_2.sce b/2863/CH2/EX2.2/ex2_2.sce
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+//chapter 2
+//formula etta=Prad/Prad+Ploss=Rrad/Rrad+Rloss
+printf("\n");
+Rrad=72;
+printf("radiation resistance is %dohm",Rrad);
+Rloss=8;
+ettar=72/(72+8);
+printf("\nthe Loss resistance is %dohm",Rloss);
+Gpmax=30;
+printf("\nthe power gain of antenna is %d",Gpmax);
+Gdmax=Gpmax/ettar;
+Gdmax1=10 *log10(Gdmax);//in db
+printf("\nthe Directivity gain is %g",Gdmax);
+printf("\nthe Directivity gain in db is given by %edb",Gdmax1);