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+{
+ "metadata": {
+  "name": "",
+  "signature": "sha256:f6d3766ede10d7f012eb8ad865bad8af32df466b5fa260a3ac4557604c5c1440"
+ },
+ "nbformat": 3,
+ "nbformat_minor": 0,
+ "worksheets": [
+  {
+   "cells": [
+    {
+     "cell_type": "heading",
+     "level": 1,
+     "metadata": {},
+     "source": [
+      "Chapter13, Antenna Measurement"
+     ]
+    },
+    {
+     "cell_type": "heading",
+     "level": 2,
+     "metadata": {},
+     "source": [
+      "Example No. 13.4.1, page : 13-10"
+     ]
+    },
+    {
+     "cell_type": "code",
+     "collapsed": false,
+     "input": [
+      "from math import log10, pi\n",
+      "from __future__ import division\n",
+      "Pr1=0.0297/1000 #W(Recieved power)\n",
+      "Pr2=0.0471/1000 #W(Recieved power)\n",
+      "Pr3=0.0374/1000 #W(Recieved power)\n",
+      "Pt=1 #W(Transmitted power)\n",
+      "R=10 #m(Radius)\n",
+      "f=980 #MHz(Frequency)\n",
+      "f=f*10**6 #Hz(Frequency)\n",
+      "c=3*10**8 #m/s(Speed of light)\n",
+      "lamda=c/f #m(Wavelength)\n",
+      "A=20*log10(4*pi*R/lamda)+10*log10(Pr1/Pt) #(A=G1dB+G2dB)\n",
+      "B=20*log10(4*pi*R/lamda)+10*log10(Pr2/Pt) #(B=G1dB+G3dB)\n",
+      "C=20*log10(4*pi*R/lamda)+10*log10(Pr3/Pt) #(C=G2dB+G3dB)\n",
+      "G1dB=(A+B-C)/2 \n",
+      "G2dB=(A-B+C)/2 \n",
+      "G3dB=(-A+B+C)/2 \n",
+      "print \"Gain of antennas, G1db, G2dB & G3dB(in dB) are : %0.f, %0.f & %0.f\"%(round(G1dB),round(G2dB),round(G3dB))"
+     ],
+     "language": "python",
+     "metadata": {},
+     "outputs": [
+      {
+       "output_type": "stream",
+       "stream": "stdout",
+       "text": [
+        "Gain of antennas, G1db, G2dB & G3dB(in dB) are : 4, 3 & 5\n"
+       ]
+      }
+     ],
+     "prompt_number": 3
+    }
+   ],
+   "metadata": {}
+  }
+ ]
+}
+\ No newline at end of file