diff options
Diffstat (limited to 'Antennas_and_Wave_Propagation/chapter9.ipynb')
| -rw-r--r-- | Antennas_and_Wave_Propagation/chapter9.ipynb | 65 |
1 files changed, 65 insertions, 0 deletions
diff --git a/Antennas_and_Wave_Propagation/chapter9.ipynb b/Antennas_and_Wave_Propagation/chapter9.ipynb new file mode 100644 index 00000000..72d11c5d --- /dev/null +++ b/Antennas_and_Wave_Propagation/chapter9.ipynb @@ -0,0 +1,65 @@ +{ + "metadata": { + "name": "" + }, + "nbformat": 3, + "nbformat_minor": 0, + "worksheets": [ + { + "cells": [ + { + "cell_type": "markdown", + "metadata": {}, + "source": [ + "<h1>Chapter 9: Reflector Antennas<h1>" + ] + }, + { + "cell_type": "markdown", + "metadata": {}, + "source": [ + "<h3>Example 9-2.1, Page number: 372<h3>" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "from math import pi,sqrt\n", + "\n", + "#Variable declaration\n", + "P_transmit = 25000.0 #Power transmitted by station transmitter (W)\n", + "gain_dbi = 29.0 #Gain of array (dBi)\n", + "r = 7500e3 #Distance (m)\n", + "h = 250e3 #Height (m)\n", + "z = 377.0 #Intrinsic impedence of free space (ohm)\n", + "\n", + "#Calculation\n", + "gain = 10**(gain_dbi/10) #Gain of array (unitless)\n", + "erp = gain*P_transmit #Effective radiated power (W)\n", + "p_area = erp/(2*pi*r*h) #power per unit area at distance r (W/m^2)\n", + "field_str = sqrt(p_area*z) #Field strength (mV/m)\n", + "\n", + "#Result\n", + "print \"The effective radiated power is\", round(erp,-5),\"W\"\n", + "print \"The field strength at the distance r is \",round(field_str,3), \"V/m^2\"" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "The effective radiated power is 19900000.0 W\n", + "The field strength at the distance r is 0.025 V/m^2\n" + ] + } + ], + "prompt_number": 1 + } + ], + "metadata": {} + } + ] +}
\ No newline at end of file |