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Diffstat (limited to '3542/CH4/EX4.3/Ex4_3.sce')
| -rw-r--r-- | 3542/CH4/EX4.3/Ex4_3.sce | 38 |
1 files changed, 38 insertions, 0 deletions
diff --git a/3542/CH4/EX4.3/Ex4_3.sce b/3542/CH4/EX4.3/Ex4_3.sce new file mode 100644 index 000000000..9d9d56e77 --- /dev/null +++ b/3542/CH4/EX4.3/Ex4_3.sce @@ -0,0 +1,38 @@ +// Example 4.3
+// To find a)power at receiver b)magnitude of E-field at receiver c)rms voltage applied to receiver input
+// Page no. 112
+
+clc;
+clear all;
+
+// Given data
+Pt=50; // Transmitter power in Watt
+fc=900*10^6; // Carrier frequency in Hz
+Gt=1; // Transmitter antenna gain
+Gr=2; // Receiver antenna gain
+Rant=50; // Receiver antenna resistance in ohm
+
+// a)Power at receiver
+d=10*10^3; // Distance from antenna in meter
+lambda=(3*10^8)/fc; // Carrier wavelength in meter
+Prd1=10*log10((Pt*Gt*Gr*lambda^2)/((4*%pi)^2*d^2)); // Power at transmitter in dBW
+Prd=10*log10(((Pt*Gt*Gr*lambda^2)/((4*%pi)^2*d^2))/(10^-3)); // Power at transmitter in dBm
+
+// Displaying the result in command window
+printf('\n Power at receiver = %0.1f dBW',Prd1);
+printf('\n Power at receiver = %0.1f dBm',Prd);
+
+// b)Magnitude of E-field at receiver
+Ae=(Gr*lambda^2)/(4*%pi); // Aperture gain
+Pr=10^(Prd1/10); // Receiver power in W
+E=sqrt((Pr*120*%pi)/Ae); // Magnitude of E-field at receiver
+
+// Displaying the result in command window
+printf('\n \n Magnitude of E-field at receiver = %0.4f V/m',E);
+
+// c)rms voltage applied to receiver input
+Vant=sqrt(Pr*4*Rant)*10^3; // rms voltage applied to receiver input
+//Answer is varrying due to round-off error
+
+//Displaying the result in command window
+printf('\n \n RMS voltage applied to receiver input = %0.3f mV',Vant);
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