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diff --git a/3788/CH4/EX4.3.4/Ex4_3_4.sce b/3788/CH4/EX4.3.4/Ex4_3_4.sce
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+//Example 4.3.4
+// Calculate the GT ratio and also if the Noise temperature is risen
+
+//Variables
+clc
+clear
+D = 30
+na = 0.68
+lam = 0.0723
+temp0 = 79
+temp1 = 88
+
+//Calculation
+Gr = na*((%pi*D)/lam)^2
+GrdB = 10*log10(Gr)
+Ts0 = 10*log10(temp0)
+Ts1 = 10*log10(temp1)
+GT = GrdB - Ts0
+GTnew = GrdB - Ts1
+
+//Result
+printf("The Gain of antenna is %f dB \n",GrdB)
+printf("System noise temperature is %f dBK \n",Ts1)
+printf("Earth station GT ratio is %f dB/K \n",GT)
+printf("If the temperature rises to 88K ,then new GT ratio is %f dB/K",GTnew)