1 files changed, 16 insertions, 0 deletions
diff --git a/761/CH20/EX20.5/20_5.sce b/761/CH20/EX20.5/20_5.sce
new file mode 100755
index 000000000..d3a5deb9f
--- /dev/null
+++ b/761/CH20/EX20.5/20_5.sce
@@ -0,0 +1,16 @@
+clc;
+// page no 760
+// prob no 20.5
+// In the given problem
+G=40;// receiving antenna gain
+T_sky=15;// noise temp
+L=0.4;//loss between antenna and LNA input
+T_eq =40;// noise temperature f LNA
+// Fir-st we have to find G in dB
+G_dB = G-L;
+// For the calculation of T, we have to convert the feedhorn loss into a ratio as follows
+L=10^(0.4/10);
+Ta = ((L-1)*290 + T_sky )/ L;
+// The receiver noise temperature is given wrt the chosen reference point,theefore
+Ratio= G -10*log10(Ta+T_eq);
+disp('dB',Ratio,'The receiver noise temperature is');
+\ No newline at end of file