From 7f60ea012dd2524dae921a2a35adbf7ef21f2bb6 Mon Sep 17 00:00:00 2001
From: prashantsinalkar
Date: Tue, 10 Oct 2017 12:27:19 +0530
Subject: initial commit / add all books

---
 3542/CH4/EX4.6/Ex4_6.sce | 40 ++++++++++++++++++++++++++++++++++++++++
 1 file changed, 40 insertions(+)
 create mode 100644 3542/CH4/EX4.6/Ex4_6.sce

(limited to '3542/CH4/EX4.6/Ex4_6.sce')

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);
-- 
cgit