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diff --git a/Electronic_Communication_Systems/Chapter11.ipynb b/Electronic_Communication_Systems/Chapter11.ipynb new file mode 100755 index 00000000..735768b6 --- /dev/null +++ b/Electronic_Communication_Systems/Chapter11.ipynb @@ -0,0 +1,412 @@ +{ + "metadata": { + "name": "", + "signature": "sha256:036aa35bf5e5de2a2351f2b120a2084a8b3fc2b376331b57004e9eccc3893299" + }, + "nbformat": 3, + "nbformat_minor": 0, + "worksheets": [ + { + "cells": [ + { + "cell_type": "heading", + "level": 1, + "metadata": {}, + "source": [ + "Chapter 11: Antennas" + ] + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 11.1, page no. 292" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "\n", + "# Variable Declaration\n", + "f1 = 1.00*pow(10,6) # Operating Frequency (Hz)\n", + "f2 = 10.00*pow(10,3) # Operating Frequency (Hz)\n", + "c = 3.00*pow(10,8) # Speed of light in vacuum (m/s)\n", + "\n", + "# Calculation\n", + "Lambda1 = c/f1 # Mechanical Length (m)\n", + "Lambda2 = c/f2 # Mechanical Length (m)\n", + "\n", + "# Result\n", + "print \"(a) Mechanical Length at 1 MHz, Lambda1 =\",round(Lambda1),\"m\"\n", + "print \"(b) Mechanical Length at 10 kHz, Lambda2 =\",round(Lambda2),\"m\"\n", + "print \" Increase in Length =\",round(Lambda2/Lambda1),\"times\"" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "(a) Mechanical Length at 1 MHz, Lambda1 = 300.0 m\n", + "(b) Mechanical Length at 10 kHz, Lambda2 = 30000.0 m\n", + " Increase in Length = 100.0 times\n" + ] + } + ], + "prompt_number": 16 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 11.2, page no. 294" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "\n", + "# Variable Declaration \n", + "f = 1.00*pow(10,6) # Operating Frequency (Hz)\n", + "Le = 30 # Hertzian Dipole Length (m)\n", + "I = 5 # Current value (A)\n", + "r = 1.00*pow(10,3) # Distance (m)\n", + "Theeta = 90 # Angle (degrees)\n", + "c = 3.00*pow(10,8) # Speed of light in vacuum (m/s)\n", + "\n", + "# Calculation\n", + "import math\n", + "Lambda = c/f # Wavelength (m)\n", + "E = ((60*math.pi*Le*I)/Lambda*r)*math.sin(Theeta*math.pi/180) # Calculation of Field Strength (s/m)\n", + "\n", + "# Result\n", + "print \"Field Strength at a distance of 1 km and at an angle of 90 degrees, E =\",round(E/(math.pi*pow(10,3))),\"*pi*10^(-3) us/m\"" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "Field Strength at a distance of 1 km and at an angle of 90 degrees, E = 30.0 *pi*10^(-3) us/m\n" + ] + } + ], + "prompt_number": 15 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 11.3, page no. 296" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "\n", + "# Variable Declaration \n", + "f = 500*pow(10,3) # Operating Frequency (Hz)\n", + "vel = 3.00*pow(10,8) # Speed of light in vacuum (m/s)\n", + "Vf = 0.95 # Velocity Factor\n", + "\n", + "# Calculation\n", + "import math # Math Library\n", + "Le = vel/f*Vf # Length of the antenna (m)\n", + "\n", + "# Result\n", + "print \"The Length of the Antenna, Le =\",round(Le),\"m or\",round(Le*3.936),\"ft\"\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "The Length of the Antenna, Le = 570.0 m or 2244.0 ft\n" + ] + } + ], + "prompt_number": 17 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 11.4, page no. 299" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "\n", + "# Variable Declaration \n", + "P1 = 1*pow(10,3) # Power of Half Wave Dipole antenna (w)\n", + "A = 2.15 # Gain (dB)\n", + "\n", + "# Calculation\n", + "import math # Math Library\n", + "P2 = pow(10,A/10)*P1 # Power delivered (w)\n", + "\n", + "# Result\n", + "print \"The power delivered to the isotropic antenna to match the field strength of directional antenna, P2 =\",round(P2,1),\"W\"" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "The power delivered to the isotropic antenna to match the field strength of directional antenna, P2 = 1640.6 W\n" + ] + } + ], + "prompt_number": 18 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 11.5, page no. 300" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "\n", + "\n", + "# Variable Declaration \n", + "P = 1.00*pow(10,3) # Input Power (W)\n", + "field_gain = 2 # Field Gain\n", + "E = 0.5 # (*100) Efficiency (%)\n", + "\n", + "# Calculation\n", + "import math # Math Library\n", + "Po = P*E # Power fed (W)\n", + "erp = Po*pow(field_gain,2) # Effective Radiated Power (w)\n", + "\n", + "\n", + "# Result\n", + "print \" The Effective Radiated Power, erp =\",round(erp),\"W\"" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + " The Effective Radiated Power, erp = 2000.0 W\n" + ] + } + ], + "prompt_number": 19 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 11.6, page no. 300" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "\n", + "# Variable Declaration \n", + "P_in = 800 # Input Power (W)\n", + "E_lost = 0.25 # (*100) Loss Percentage (%)\n", + "\n", + "# Calculation\n", + "import math # Math Library\n", + "Pd = E_lost*P_in # Power Lost (W)\n", + "P_rad = P_in-Pd # Radiated Power (W)\n", + "\n", + "# Result\n", + "print \"Radiated Power, P_rad =\",round(P_rad),\"W\"" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "Radiated Power, P_rad = 600.0 W\n" + ] + } + ], + "prompt_number": 20 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 11.7, page no. 301" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "\n", + "\n", + "# Variable Declaration \n", + "R_rad = 100 # Radiation Resistance (Ohms)\n", + "E = 0.75 # (*100) Efficiency (%)\n", + "\n", + "# Calculation\n", + "import math # Math Library\n", + "Rd = R_rad/E-R_rad # Antenna Resistance (Ohms)\n", + "\n", + "# Result\n", + "print \"Antenna Resistance, Rd =\",round(Rd,2),\"Ohms\"" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "Antenna Resistance, Rd = 33.33 Ohms\n" + ] + } + ], + "prompt_number": 10 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 11.8, page no. 309" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "\n", + "# Variable Declaration \n", + "Zs = 5 # Impedance of the transmission line (Ohms)\n", + "Zr = 70 # Impedance of the antenna (Ohms)\n", + "\n", + "# Calculation\n", + "import math # Math Library\n", + "Z = Zs*Zr # Characteristic Impedance (Ohms)\n", + "\n", + "# Result\n", + "print \"The characteristic impedance of the matching section, Z =\",round(Z),\"Ohms\"" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "The characteristic impedance of the matching section, Z = 350.0 Ohms\n" + ] + } + ], + "prompt_number": 21 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 11.9, page no. 316" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "\n", + "# Variable Declaration \n", + "D = 2 # Mouth diameter of reflector (m)\n", + "f = 6.00*pow(10,9) # Operating Frequency (Hz)\n", + "c = 3.00*pow(10,8) # Speed of light in vacuum (m/s)\n", + "\n", + "# Calculation\n", + "import math # Math Library\n", + "Lambda = c/f # Wavelength (m)\n", + "phi_o = 2*70*Lambda/D # Beam width between nulls of a paraboloid reflector (degrees)\n", + "\n", + "# Result\n", + "print \"The beam width between nulls of a paraboloid reflector, phi_o =\",round(phi_o,1),\"degrees\"" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "The beam width between nulls of a paraboloid reflector, phi_o = 3.5 degrees\n" + ] + } + ], + "prompt_number": 22 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 11.10, page no. 317" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "\n", + "# Variable Declaration \n", + "D = 200 # Mouth diameter of reflector (m)\n", + "Lambda = 5 # Wavelength (m)\n", + "\n", + "# Calculation\n", + "import math # Math Library\n", + "Ap = 6*pow(D/Lambda,2) # Gain of the antenna\n", + "\n", + "# Result\n", + "print \" The gain of the antenna, Ap =\",round(Ap)" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + " The gain of the antenna, Ap = 9600.0\n" + ] + } + ], + "prompt_number": 13 + } + ], + "metadata": {} + } + ] +}
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