1 files changed, 19 insertions, 0 deletions
diff --git a/998/CH29/EX29.85/Ex85.sce b/998/CH29/EX29.85/Ex85.sce
new file mode 100755
index 000000000..50465cb8d
--- /dev/null
+++ b/998/CH29/EX29.85/Ex85.sce
@@ -0,0 +1,19 @@
+//Ex:85
+clc;
+clear;
+close;
+d=20;//dia in m
+A=(%pi*d*d)/4;// Aperture raea
+c=3*10^8;//velocity of light in m/s
+f1=11.95*10^9;//in Hz
+f2=14.25*10^9;// in Hz
+y1=c/f1;//wavelength in m for f1
+y2=c/f2;//wavelength in m for f2
+u1=0.98*0.99*0.97*0.85*0.90*0.92;//aperture eff for 11.95 GHz
+u2=0.96*0.99*0.97*0.85*0.90*0.92;//aperture eff for 14.25 GHz
+G1=(u1*4*%pi*A)/(y1*y1);
+G2=(u2*4*%pi*A)/(y2*y2);
+g2=10*log(G2)/log(10);// in db
+g1=10*log(G1)/log(10);// in db
+printf("The antenna power gain=%f db",g1);
+printf("\n The antenna power gain=%f db",g2);
+\ No newline at end of file