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Diffstat (limited to '3542/CH4/EX4.6/Ex4_6.sce')
| -rw-r--r-- | 3542/CH4/EX4.6/Ex4_6.sce | 40 |
1 files changed, 40 insertions, 0 deletions
diff --git a/3542/CH4/EX4.6/Ex4_6.sce b/3542/CH4/EX4.6/Ex4_6.sce new file mode 100644 index 000000000..b9b9e500c --- /dev/null +++ b/3542/CH4/EX4.6/Ex4_6.sce @@ -0,0 +1,40 @@ +// Example no 4.6
+// To find a)the length and effective aperture of receiving antenna b)the received power at mobile
+// Page no. 125
+
+clc;
+clear;
+
+// Given data
+d=5*10^3; // distance of mobile from base station in m
+E0=1*10^-3; // E-field at 1Km from transmitter in V/m
+d0=1*10^3; // Distance from transmitter in m
+f=900*10^6; // Carrier frequency used for the system in Hz
+c=3*10^8; // Speed of ligth in m/s
+gain=2.55; // Gain of receiving antenna in dB
+G=10^(gain/10); // Gain of receiving antenna
+
+// a)To find the length and effective aperture of receiving antenna
+lambda=c/f; // Wavelength
+L=lambda/4; // Length of antenna
+Ae=(G*lambda^2)/(4*%pi); // Effective aperture of receiving antenna
+
+// Displaying the result in command window
+printf('\n Length of antenna = %0.4f m',L);
+printf(' = %0.2f cm',L*10^2);
+printf('\n Effective aperture of receiving antenna = %0.3f m^2',Ae);
+
+// b)To find the received power at mobile
+// Given data
+ht=50; // Heigth of transmitting antenna
+hr=1.5; // Heigth of receiving antenna
+ERd=(2*E0*d0*2*%pi*ht*hr)/(d^2*lambda); // Electic field at distance d in V/m
+Prd=((ERd^2/377)*Ae); // The received power at mobile in W
+PrddB=10*log10(Prd); // The received power at mobile in dBW
+PrddBm=10*log10(Prd/10^-3); // The received power at mobile in dBm
+Prd=((ERd^2/377)*Ae)*10^13; // The received power at mobile in 10^-13W
+
+// Displaying the result in command window
+printf('\n \n The received power at mobile = %0.1f X 10^-13 W',Prd);
+printf(' = %0.2f dBW',PrddB);
+printf(' = %0.2f dBm',PrddBm);
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