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diff --git a/Principles_Of_Electronic_Communication_Systems/chapter22.ipynb b/Principles_Of_Electronic_Communication_Systems/chapter22.ipynb
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@@ -0,0 +1,94 @@
+{
+ "metadata": {
+  "name": "",
+  "signature": "sha256:d66b7b0a5ebd4fcdf9eb24f98ae81ac03aa2dcdb229f576b47a170647bd9ea49"
+ },
+ "nbformat": 3,
+ "nbformat_minor": 0,
+ "worksheets": [
+  {
+   "cells": [
+    {
+     "cell_type": "heading",
+     "level": 1,
+     "metadata": {},
+     "source": [
+      "Chapter 22 Communication tests and measurments"
+     ]
+    },
+    {
+     "cell_type": "heading",
+     "level": 2,
+     "metadata": {},
+     "source": [
+      "Example 22.1 Page no 854"
+     ]
+    },
+    {
+     "cell_type": "code",
+     "collapsed": false,
+     "input": [
+      "#Given\n",
+      "Vp=8                       #volts\n",
+      "R=75                       #Ohm\n",
+      "\n",
+      "#Calculation\n",
+      "Vmax=0.707*Vp\n",
+      "P=Vmax**2/R\n",
+      "\n",
+      "#Result\n",
+      "print\"Power is dissipated in the load is \",round(P,4),\"Watt\""
+     ],
+     "language": "python",
+     "metadata": {},
+     "outputs": [
+      {
+       "output_type": "stream",
+       "stream": "stdout",
+       "text": [
+        "Power is dissipated in the load is  0.4265 Watt\n"
+       ]
+      }
+     ],
+     "prompt_number": 3
+    },
+    {
+     "cell_type": "heading",
+     "level": 2,
+     "metadata": {},
+     "source": [
+      "Example 22.2 Page no 857"
+     ]
+    },
+    {
+     "cell_type": "code",
+     "collapsed": false,
+     "input": [
+      "#Given\n",
+      "Pf=380.0                     #Watt\n",
+      "Pr=40                      #Watt\n",
+      "\n",
+      "#Calculation\n",
+      "import math\n",
+      "m=math.sqrt(Pr/Pf)\n",
+      "SWR=(1+m)/(1-m)\n",
+      "print\"SWR= \",round(SWR,2)"
+     ],
+     "language": "python",
+     "metadata": {},
+     "outputs": [
+      {
+       "output_type": "stream",
+       "stream": "stdout",
+       "text": [
+        "SWR=  1.96\n"
+       ]
+      }
+     ],
+     "prompt_number": 8
+    }
+   ],
+   "metadata": {}
+  }
+ ]
+}
+\ No newline at end of file