diff options
| author | priyanka | 2015-06-24 15:03:17 +0530 |
|---|---|---|
| committer | priyanka | 2015-06-24 15:03:17 +0530 |
| commit | b1f5c3f8d6671b4331cef1dcebdf63b7a43a3a2b (patch) | |
| tree | ab291cffc65280e58ac82470ba63fbcca7805165 /605/CH2/EX2.11/2_11.sce | |
| download | Scilab-TBC-Uploads-b1f5c3f8d6671b4331cef1dcebdf63b7a43a3a2b.tar.gz Scilab-TBC-Uploads-b1f5c3f8d6671b4331cef1dcebdf63b7a43a3a2b.tar.bz2 Scilab-TBC-Uploads-b1f5c3f8d6671b4331cef1dcebdf63b7a43a3a2b.zip | |
initial commit / add all books
Diffstat (limited to '605/CH2/EX2.11/2_11.sce')
| -rwxr-xr-x | 605/CH2/EX2.11/2_11.sce | 35 |
1 files changed, 35 insertions, 0 deletions
diff --git a/605/CH2/EX2.11/2_11.sce b/605/CH2/EX2.11/2_11.sce new file mode 100755 index 000000000..5638563d5 --- /dev/null +++ b/605/CH2/EX2.11/2_11.sce @@ -0,0 +1,35 @@ +printf("\n\t(a) Find the noise figure of this cascaded system.")
+printf("\n\t(b) What would be the noise figure if the amplifier were placed before the transmission line?\n")
+// data in question
+//ambient temperature(K)
+Te=300
+To=290
+//noise temperature of amplifier(K)
+Ta=150
+k=1.38*10^-23
+//band width(Hz)
+B=100*10^6
+//gain of amplifier
+Gamp=10^(15/10)
+// for transmission lines
+Gline=1/10^0.2
+//data print
+printf("\nTe=300K\tTa=150K\tB=100MHz\tGamp=15dB\tattenuation=2dB\n")
+//equations and result
+printf("\nresult:-")
+//noise factor for amplifier
+Famp=1+Ta/To
+printf("\nFamp=1+Ta/To")
+//noise for transmission lines
+Fline=1+(1/Gline-1)*Te/To
+printf("\nFline=1+(1/Gline-1)*Te/To")
+Fcascaded=Fline+(Famp-1)/Gline
+printf("\n(a)noise figure of cascaded system\n\tFcascaded=Fline+(Famp-1)/Gline = %.4f",Fcascaded)
+printf(" = %.4f dB",10*log10(Fcascaded))
+Fcascaded=Famp+(Fline-1)/Gamp
+printf("\n(b)if the amplifier is connected before the line\n\tFcascaded=Famp+(Fline-1)/Gamp = %.4f",Fcascaded)
+printf(" = %.4f dB",10*log10(Fcascaded))
+
+
+
+
|