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diff --git a/Radar_Engineering_and_Funamentals_of_Navigational_Aids/chapter9_1.ipynb b/Radar_Engineering_and_Funamentals_of_Navigational_Aids/chapter9_1.ipynb new file mode 100755 index 00000000..807fa066 --- /dev/null +++ b/Radar_Engineering_and_Funamentals_of_Navigational_Aids/chapter9_1.ipynb @@ -0,0 +1,553 @@ +{ + "metadata": { + "name": "raju chapter 9" + }, + "nbformat": 3, + "nbformat_minor": 0, + "worksheets": [ + { + "cells": [ + { + "cell_type": "heading", + "level": 1, + "metadata": {}, + "source": "Chapter 9:Radar Antennas" + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": "Example 9.1,Page No:352" + }, + { + "cell_type": "code", + "collapsed": false, + "input": "import math\n\n#variable declaration\nDa = 2.5; #diameter of parabolic antenna in m\nF = 5*10**9; #radar operating frequency in hz\nVo = 3*10**8; #velocity of EM wave in m/s\n\n#Calculations\nlamda = Vo/float(F); #wavelength\nNNBW = 140*(lamda/float(Da));\nHPBW = 70*(lamda/float(Da)); #half power beamwidth in deg\n\n#result\n\nprint'NNBW of parabolic reflector is %g'%(NNBW),' degrees';\nprint'HPBW of parabolic reflector is %g'%(HPBW),' degrees';\n", + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": "NNBW of parabolic reflector is 3.36 degrees\nHPBW of parabolic reflector is 1.68 degrees\n" + } + ], + "prompt_number": 1 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": "Example 9.2,Page No:352" + }, + { + "cell_type": "code", + "collapsed": false, + "input": "import math\n\n#variable declaration\nDa = 2.5; #diameter of parabolic antenna in m\nF = 5*10**9; #radar operating frequency in hz\nVo = 3*10**8; #velocity of EM wave in m/s\n\n#Calculations\nlamda = Vo/float(F); #wavelength\nGp = 6.4*(Da/float(lamda))**(2); #gain of parabolic reflector\nG = 10*math.log10(Gp); #gain in dB\n\n#result\n\nprint'Gain of parabolic reflector is %3.2f'%G,' dB';", + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": "Gain of parabolic reflector is 40.46 dB\n" + } + ], + "prompt_number": 5 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": "Example 9.3,Page No:352" + }, + { + "cell_type": "code", + "collapsed": false, + "input": "import math\n\n#variable declaration\n\nDa = 0.15; #diameter of parabolic antenna in m\nF = 9*10**9; #radar operating frequency in hz\nVo = 3*10**8; #velocity of EM wave in m/s\n\n#Calculations\n\nlamda = Vo/float(F); #wavelength\nGp = 6.4*(Da/float(lamda))**(2); #gain of parabolic reflector\nG = 10*math.log10(Gp); #gain in dB\nNNBW = 140*(lamda/float(Da));\nHPBW = 70*(lamda/float(Da)); #half power bandwidth in deg\n\n#result\nprint'NNBW of parabolic reflector is %3.2f'%(NNBW),' degrees';\nprint'HPBW of parabolic reflector is %3.2f'%(HPBW),' degrees';\nprint'Gain of parabolic reflector is %3.2f'%G,;'dB';", + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": "NNBW of parabolic reflector is 31.11 degrees\nHPBW of parabolic reflector is 15.56 degrees\nGain of parabolic reflector is 21.13\n" + } + ], + "prompt_number": 5 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": "Example 9.4,Page No:353" + }, + { + "cell_type": "code", + "collapsed": false, + "input": "import math\n\n#variable declaration\nDa = 2; #diameter of parabolic antenna in m\nF = 2*10**9; #radar operating frequency in hz\nVo = 3*10**8; #velocity of EM wave in m/s\n\n#Calculations\nlamda = Vo/float(F); #wavelength\nGp = 6.4*(Da/float(lamda))**(2); #gain of parabolic reflector\nG = 10*math.log10(Gp); #gain in dB\n\n#result\nprint'Gain of parabolic reflector is %3.2f'%G,' dB';", + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": "Gain of parabolic reflector is 30.56 dB\n" + } + ], + "prompt_number": 4 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": "Example 7.5,Page No:353" + }, + { + "cell_type": "code", + "collapsed": false, + "input": "import math\n\n#variable declaration\n\nF = 6*10**9; #radar operating frequency in hz\nVo = 3*10**8; #velocity of EM wave in m/s\nNNBW = 5; #Null to Null beamwidth\n\n#Calculations\nlamda = Vo/float(F); #wavelength\n\nDa = 140*(lamda/float(NNBW));\nHPBW = 70*(lamda/float(Da)); #half power beamwidth in deg\nGp = 6.4*(Da/float(lamda))**2; #gain of parabolic reflector\nG = 10*math.log10(Gp); #gain in dB\n\n#result\nprint'Mouth Diameter of paraboloid is %g'%Da,' m';\nprint'HPBW of parabolic reflector is %g'%(HPBW),' degrees';\n\nprint'Gain of parabolic reflector is %g'%G,' dB';\nprint'Gain of parabolic reflector is %g'%Gp;\n", + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": "Mouth Diameter of paraboloid is 1.4 m\nHPBW of parabolic reflector is 2.5 degrees\nGain of parabolic reflector is 37.005 dB\nGain of parabolic reflector is 5017.6\n" + } + ], + "prompt_number": 6 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": "Example 9.6,Page No:354" + }, + { + "cell_type": "code", + "collapsed": false, + "input": "import math\n\n#variable declaration\n\nF = 9*10**9; #radar operating frequency in hz\nVo = 3*10**8; #velocity of EM wave in m/s\nNNBW = 5; #Null to Null beamwidth\nDa = 5; #diameter of antenna in m\n\n#Calculations\n\nlamda = Vo/float(F); #wavelength\nA = (math.pi*Da*Da)/float(4); #actural area of antenna\nAc = 0.65*A; #Capture Area\n\nD = 6.4*(Da/float(lamda))**2; #directivity of antenna\nD1 = 10*math.log10(D); #gain in dB\nHPBW = 70*(lamda/float(Da)); #half power beamwidth in deg\nNNBW = 2*HPBW; #null to null beamwidth \n\n#result\nprint'HPBW of parabolic reflector is %2.2g'%(HPBW),' degrees';\nprint'NNBW of parabolic reflector is %2.2g'%(NNBW),' degrees';\nprint'Directivity is %g'%D1,' dB';\nprint'Capture area is %g'%Ac,' m^2';\n\n", + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": "HPBW of parabolic reflector is 0.47 degrees\nNNBW of parabolic reflector is 0.93 degrees\nDirectivity is 51.5836 dB\nCapture area is 12.7627 m^2\n" + } + ], + "prompt_number": 7 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": "Example 9.7,Page No:354" + }, + { + "cell_type": "code", + "collapsed": false, + "input": "import math\n\n#variable declaration\n\nDa = 5; #diameter of parabolic antenna in m\nF = 5*10**9; #radar operating frequency in hz\nVo = 3*10**8; #velocity of EM wave in m/s\n\n#Calculations\n\nlamda = Vo/float(F); #wavelength\nR = (2*Da*Da)/float(lamda); #min distance b/w antennas\n\n#result\nprint'Minimum distance Required is %g'%R,' m';", + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": "Minimum distance Required is 833.333 m\n" + } + ], + "prompt_number": 16 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": "Example 9.8,Page No:354" + }, + { + "cell_type": "code", + "collapsed": false, + "input": "import math\n\n#variable declaration\n\nF = 4*10**9; #radar operating frequency in hz\nVo = 3*10**8; #velocity of EM wave in m/s\nGp = 500; #power gain of antenna\n\n#Calculations\n\nlamda = Vo/float(F); #wavelength\nDa = lamda*(Gp/float(6.4))**(0.5); #diameter of parabolic antenna in m\n\nNNBW = 140*(lamda/float(Da)); #beamwidth b/w null to null\nHPBW = 70*(lamda/float(Da)); #half power beamwidth in deg\n\n#result\nprint'NNBW of parabolic reflector is %3.2f'%NNBW,' degrees';\nprint'HPBW of parabolic reflector is %3.2f'%HPBW,'degrees';\nprint'Mouth diameter of parabolic reflector is %3.2f '%Da,'m';\n", + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": "NNBW of parabolic reflector is 15.84 degrees\nHPBW of parabolic reflector is 7.92 degrees\nMouth diameter of parabolic reflector is 0.66 m\n" + } + ], + "prompt_number": 8 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": "Example 9.9,Page No:355" + }, + { + "cell_type": "code", + "collapsed": false, + "input": "import math\n\n#variable declaration\n\nF = 9*10**9; #radar operating frequency in hz\nVo = 3*10**8; #velocity of EM wave in m/s\nGp = 100; #power gain of antenna in dB\n\n#Calculations\n\nlamda = Vo/float(F); #wavelength\n#antilog calculation\n#100 = 10log10(Gp);\n#10 = log(Gp)\n\nG = 10**10; #gain of antenna\nDa = lamda*math.sqrt(G/float(6.4)); #diameter of parabolic antenna in m\nA = (math.pi*Da*Da)/float(4); #Area of antenna\nAc = 0.65*A; #capture area\nNNBW = 140*(lamda/float(Da)); #beamwidth b/w null to null\nHPBW = 70*(lamda/float(Da)); #half power beamwidth in deg\n\n#result\nprint'NNBW of parabolic reflector is %g'%NNBW,' degrees';\nprint'HPBW of parabolic reflector is %g'%HPBW,' degrees';\n\nprint'Mouth diameter of parabolic reflector is %3.3f'%Da,' m';\nprint'Capture area is %3.2f'%Ac,'m**2';", + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": "NNBW of parabolic reflector is 0.00354175 degrees\nHPBW of parabolic reflector is 0.00177088 degrees\nMouth diameter of parabolic reflector is 1317.616 m\nCapture area is 886300.01 m**2\n" + } + ], + "prompt_number": 9 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": "Example 9.10,Page No:356" + }, + { + "cell_type": "code", + "collapsed": false, + "input": "import math\n\n#variable declaration\n\nF = 10*10**9; #radar operating frequency in hz\nVo = 3*10**8; #velocity of EM wave in m/s\nDa = 5; #antenna diameter in m\n\n#Calculations\nlamda = Vo/float(F); #wavelength\nGp = 6.4*(Da/float(lamda))**(2); #gain of parabolic reflector\nG = 10*math.log10(Gp); #gain in dB\n\nBWFN = 140*(lamda/float(Da)); #beam width b/n nulls\nHPBW = 70*(lamda/float(Da)); #half power beamwidth in deg\n\n\n#result\nprint'BWFN of parabolic reflector is %g'%BWFN,' degrees';\nprint'HPBW of parabolic reflector is %g'%HPBW,' degrees';\n\nprint'Gain of parabolic reflector is %g'%G,'dB';\n", + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": "BWFN of parabolic reflector is 0.84 degrees\nHPBW of parabolic reflector is 0.42 degrees\nGain of parabolic reflector is 52.4988 dB\n" + } + ], + "prompt_number": 10 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": "Example 9.11,Page No:356" + }, + { + "cell_type": "code", + "collapsed": false, + "input": "import math\n\n#variable declaration\n\nF = 10*10**9; #radar operating frequency in hz\nVo = 3*10**8; #velocity of EM wave in m/s\nIE =0.6; #illumination efficiency\nDa =12; #diameter of antenna\n\n#Calculations\n\nlamda = Vo/float(F); #wavelength\nGp = IE*(Da/float(lamda))**(2); #gain of parabolic reflector\nG = 10*math.log10(Gp); #gain in dB\n\n#result\nprint' Gain of parabolic reflector is %3.2f'%G,'dB';\n", + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": " Gain of parabolic reflector is 49.82 dB\n" + } + ], + "prompt_number": 24 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": "Example 9.12,Page No:357" + }, + { + "cell_type": "code", + "collapsed": false, + "input": "import math\n\n#variable declaration\n\nF = 4*10**9; #radar operating frequency in hz\nVo = 3*10**8; #velocity of EM wave in m/s\nNNBW = 8; #Null to Null beamwidth in degrees \n\n#Calculations\n\nlamda = Vo/float(F); #wavelength\nDa = (140*lamda)/float(NNBW);\nA = (math.pi*Da*Da)/float(4); #Area of antenna\nAc = 0.65*A; #capture area\n\n#result\nprint'Mouth diameter of parabolic reflector is %3.3f'%Da,' m'; \nprint'Capture area is %3.2f'%Ac,' m**2';\n", + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": "Mouth diameter of parabolic reflector is 1.312 m\nCapture area is 0.88 m**2\n" + } + ], + "prompt_number": 11 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": "Example 9.13,Page No:357" + }, + { + "cell_type": "code", + "collapsed": false, + "input": "import math\n\n#variable declaration\n\nF = 4*10**9; #radar operating frequency in hz\nVo = 3*10**8; #velocity of EM wave in m/s\nNNBW = 2; #Null to Null Beamwidth in degrees\n\n#Calculations\n\nlamda = Vo/float(F); #wavelength\nDa = (140*lamda)/float(2); #diameter of antenna in m\nGp = 6.4*(Da/float(lamda))**(2); #gain of parabolic reflector\nG = 10*math.log10(Gp); #gain in dB\n\n\n#result\nprint'Gain of parabolic reflector is %g'%G,'dB';\nprint'mouth diameter of the antenna is %g'%Da,'m';\n", + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": "Gain of parabolic reflector is 44.9638 dB\nmouth diameter of the antenna is 5.25 m\n" + } + ], + "prompt_number": 12 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": "Example 9.14,Page No:358" + }, + { + "cell_type": "code", + "collapsed": false, + "input": "import math\n\n#variable declaration\n\nHPBW = 6; #Half power Beamwidth in degrees\n\n#Calculations\n\nNNBW = 2*HPBW; #Null to Null beamwidth in degrees\n\n#HPBW = 70*(lamda/Da);\n#(70/HPBW)= (Da/lamda);\n\nGp = 6.4*(70/float(HPBW))**(2); #gain of parabolic reflector\nG = 10*math.log10(Gp); #gain in dB\n\n\n#result\nprint'Gain of parabolic reflector is %3.2f'%G,'dB';\nprint'NNBW of the antenna is %g'%NNBW,'degrees';\n", + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": "Gain of parabolic reflector is 29.40 dB\nNNBW of the antenna is 12 degrees\n" + } + ], + "prompt_number": 13 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": "Example 9.15,Page No:358" + }, + { + "cell_type": "code", + "collapsed": false, + "input": "import math\n\n#variable declaration\n\nGp =6.4*(6)**2;\nG = 10*math.log10(Gp); #gain in dB\n\n\n#result\n\nprint'Gain of parabolic reflector is %3.2f'%G,'dB';", + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": "Gain of parabolic reflector is 23.62 dB\n" + } + ], + "prompt_number": 30 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": "Example 9.16,Page No:358" + }, + { + "cell_type": "code", + "collapsed": false, + "input": "import math\n\n#variable declaration\nHPBW = 70/float(7); #half power beamwidth\nNNBW = 2*HPBW; # null to null beamwidth\n#Gp = 6.4*(Da/float(lamda))**2; #power gain \n\n#Gp = 6.4*((7*lamda)/lamda)^2 ; power gain of parabolic reflector\n\nGp =6.4*(7)**2;\nG = 10*math.log10(Gp); #gain in dB\n\n\n#reault\nprint'Gain of parabolic reflector is %3.1f'%Gp; \nprint'HPBW of Antenna is %3.1f'%HPBW,' degrees';\nprint'NNBW of Antenna is %3.1f'%NNBW,' degrees';\n", + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": "Gain of parabolic reflector is 313.6\nHPBW of Antenna is 10.0 degrees\nNNBW of Antenna is 20.0 degrees\n" + } + ], + "prompt_number": 14 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": "Example 9.17,Page No:359" + }, + { + "cell_type": "code", + "collapsed": false, + "input": "import math\n\n#variable declaration\n\nF = 8*10**9; #radar operating frequency in hz\nVo = 3*10**10; #velocity of EM wave in cm/s\nD = 9; #pyramida horn diameter in cm\nW = 4; #pyramida horn width in cm\n\n#Calculations\n\nlamda = Vo/float(F); #wavelength in cm\nHPBW_E = 56*(lamda/float(D)); #halfpower beamwidth in E-plane;\nHPBW_H = 67*(lamda/float(W)); #halfpower beamwidth in H-plane;\nGp = (4.5*W*D)/float((lamda*lamda)); #power gain\nG = 10*math.log10(Gp); #power gain in dB\nDi =(7.5*W*D)/float(lamda*lamda); #directivity\n\n\n#result\nprint'Halfpower beamwidth ib E-plane is %3.2f'%HPBW_E,' degrees';\nprint'Halfpower beamwidth iN H-plane is %3.2f'%HPBW_H,' de0grees';\nprint'Powergain is %3.2f'%G,' dB';\nprint'Directivity is %3.2f'%Di;\n", + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": "Halfpower beamwidth ib E-plane is 23.33 degrees\nHalfpower beamwidth iN H-plane is 62.81 de0grees\nPowergain is 10.61 dB\nDirectivity is 19.20\n" + } + ], + "prompt_number": 15 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": "Example 9.18,Page No:359" + }, + { + "cell_type": "code", + "collapsed": false, + "input": "import math\n\n#variable declartaion\nGp = (4.5*10*10); #power gain of square horn antenna\nG = 10*math.log10(Gp); #power gain in dB\n\n#result\nprint'Power Gain of Square Horn Antenna is %3.2f'%G,'dB';", + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": "Power Gain of Square Horn Antenna is 26.53 dB\n" + } + ], + "prompt_number": 37 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": "Example 9.19,Page No:359" + }, + { + "cell_type": "code", + "collapsed": false, + "input": "import math\n\n#variable declaration\n\nF = 8*10**9; #radar operating frequency in hz\nVo = 3*10**10; #velocity of EM wave in cm/s\nD = 10; #pyramida horn diameter in cm\nW = 5; #pyramida horn width in cm\n\n#Calculations\n\nlamda = Vo/float(F); #wavelength in cm\nGp = (4.5*W*D)/float((lamda*lamda)); #power gain\nG = 10*math.log10(Gp); # power gain in dB\nDi =(7.5*W*D)/float((lamda*lamda)); #directivity\nDI =10*math.log10(Di); #Directivity in dB\n\n\n#result\nprint'Powergain is %3.2f '%G,'dB';\nprint'Directivity is %3.2f'%DI,'dB';", + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": "Powergain is 12.04 dB\nDirectivity is 14.26 dB\n" + } + ], + "prompt_number": 16 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": "Example 9.20,Page No:359" + }, + { + "cell_type": "code", + "collapsed": false, + "input": "import math\n\n#variable declaration\nno = 377; #Free space intrinsic impedance in ohms\nZd1 = complex(73,50); #dipole impedance;\nZd2 = 70; #dipole impedance;\nZd3 = 800; #dipole impedance;\nZd4 = 400; #dipole impedance;\nZd5 = complex(50,10); #dipole impedance;\nZd6 = complex(50,-30); #dipole impedance;\nZd7 = 350; #dipole impedance;\n\n#Calculations\nK = (no**2)/float(4);\n#Zs = (no*no)/(4*Zd); slot impedance\nZs1 = K/Zd1; #slot impedance\nZs2 = K/(Zd2); #slot impedance\nZs3 = K/(Zd3); #slot impedance\nZs4 = K/(Zd4); #slot impedance\nZs5 = K/(Zd5); #slot impedance\nZs6 = K/(Zd6); #slot impedance\nZs7 = K/(Zd7); #slot impedance\n\n#result\n\nprint'slot impedance if Zd = 73+i50 ohm is %3.3f'%(Zs1.real),'%3.3f i' %(Zs1.imag) ,'ohm';\nprint'slot impedance if Zd = 70 ohm is %3.3f'%(Zs2.real),'ohm';\nprint'slot impedance if Zd = 800 ohm is %3.3f'%(Zs3.real),'ohm';\nprint'slot impedance if Zd = 400 ohm is %3.3f'%(Zs4.real),'ohm';\nprint'slot impedance if Zd = 50+i10 ohm is %3.3f'%(Zs5.real),'%3.3f i' %(Zs5.imag) ,'ohm';\nprint'slot impedance if Zd = 50-i30 ohm is %3.3f'%(Zs6.real),'%3.3f i' %(Zs6.imag) ,'ohm';\nprint'slot impedance if Zd = 350 ohm is %3.3f'%(Zs7.real),'ohm';\n", + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": "slot impedance if Zd = 73+i50 ohm is 331.314 -226.927 i ohm\nslot impedance if Zd = 70 ohm is 507.604 ohm\nslot impedance if Zd = 800 ohm is 44.415 ohm\nslot impedance if Zd = 400 ohm is 88.831 ohm\nslot impedance if Zd = 50+i10 ohm is 683.312 -136.663 i ohm\nslot impedance if Zd = 50-i30 ohm is 522.533 313.520 i ohm\nslot impedance if Zd = 350 ohm is 101.521 ohm\n" + } + ], + "prompt_number": 41 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": "Example 9.21,Page No:360" + }, + { + "cell_type": "code", + "collapsed": false, + "input": "import math\n\n#variable declaration\nRr1 =80*(math.pi*math.pi)*(1/float(20))**(2) ;\n#Rr2 = 80*(pi*pi)*(dl2/lamda)^2 Radiation Resistance in ohms\n#Rr2 = 80*(pi*pi)*((lamda/30)/lamda)^2 Radiation Resistance in ohms\nRr2 =80*(math.pi*math.pi)*(1/float(30))**2 ;\n#Rr3 = 80*(pi*pi)*(dl3/lamda)^2 Radiation Resistance in ohms\n#Rr3 = 80*(pi*pi)*((lamda/40)/lamda)^2 Radiation Resistance in ohms\nRr3 =80*(math.pi*math.pi)*(1/float(40))**(2 );\n\n\n#result\nprint'If Hertzian dipole length is lamda/20 then Radiation Resistance = %3.3f' %Rr1,'ohm';\nprint'If Hertzian dipole length is lamda/30 then Radiation Resistance = %3.3f' %Rr2,' ohm';\nprint'If Hertzian dipole length is lamda/40 then Radiation Resistance = %3.3f' %Rr3,' ohm' ;\n", + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": "If Hertzian dipole length is lamda/20 then Radiation Resistance = 1.974 ohm\nIf Hertzian dipole length is lamda/30 then Radiation Resistance = 0.877 ohm\nIf Hertzian dipole length is lamda/40 then Radiation Resistance = 0.493 ohm\n" + } + ], + "prompt_number": 47 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": "Example 9.22,Page No:361" + }, + { + "cell_type": "code", + "collapsed": false, + "input": "import math\n\n#variable declaration\nprint'For half wave dipole Emax = 60*I/float(r)';\nprint'But Pr = 73 I**2 Watts';\nprint'For Pr = 1 W';\nprint'I = 1/sqrt(73)';\nprint'Emax = (60/r)*I';\nprint'Gdmax = (4*pi*phi)/Pr';\nprint'as Pr =1 and phi = ((r**(2))*(E**(2)))/no';\nprint'Gdmax = 4*pi*(r**2)*(E**2)/no';\nprint' = (4*pi*(r**2)*60*60)/(no*r*r*73)' ;\nprint' = (4*pi*60*60)/(120*math.pi*73)';\nGdmax = float(120)/73;\n\nprint'Directivity of half wave dipole is %3.3g' %Gdmax ;", + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": "For half wave dipole Emax = 60*I/float(r)\nBut Pr = 73 I**2 Watts\nFor Pr = 1 W\nI = 1/sqrt(73)\nEmax = (60/r)*I\nGdmax = (4*pi*phi)/Pr\nas Pr =1 and phi = ((r**(2))*(E**(2)))/no\nGdmax = 4*pi*(r**2)*(E**2)/no\n = (4*pi*(r**2)*60*60)/(no*r*r*73)\n = (4*pi*60*60)/(120*math.pi*73)\nDirectivity of half wave dipole is 1.64\n" + } + ], + "prompt_number": 44 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": "Example 9.23,Page No:361" + }, + { + "cell_type": "code", + "collapsed": false, + "input": "import math\n\n#variable declaration\n\nF = 12*10**9; #operating frequency in Ghz\nI = 2; #current in amperes\nRr = 300; # radiation resistance in ohms\n\n#Calculations\nPr = I*I*Rr;\n\n#result\nprint'Radiated Power is %3.1f'%Pr,' Watts';", + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": "Radiated Power is 1200.0 Watts\n" + } + ], + "prompt_number": 54 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": "Example 9.24,Page No:362" + }, + { + "cell_type": "code", + "collapsed": false, + "input": "import math\n\n#variable declaration\n\nF = 600*10**6; #radar operating frequency in hz\nVo = 3*10**8; #velocity of EM wave in m/s\nD = 1.644; #Directivity of the half wave dipole\n\n#Calculations\n\nlamda = Vo/float(F); #wavelength\nAe = ((lamda**2)*D)/(float(4*math.pi)); #effective area of antenna\n\n#result\n\nprint'Effective Area of the antenna is %3.4f'%Ae,' m^2';\n", + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": "Effective Area of the antenna is 0.0327 m^2\n" + } + ], + "prompt_number": 57 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": "Example 9.25,Page No:362" + }, + { + "cell_type": "code", + "collapsed": false, + "input": "import math\n\n#variable declaration\n\nF = 200*10**6; #radar operating frequency in hz\nVo = 3*10**8; #velocity of EM wave in m/s\nD = 1.5; #Directivity of the Hertzian dipole\n\n#Calculations\n\nlamda = Vo/float(F); #wavelength\nAe = (lamda**2*D)/(4*math.pi); #effective area of antenna\n\n#result\nprint'Effective Area of the antenna is %3.4f'%Ae,'m^2';\n", + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": "Effective Area of the antenna is 0.2686 m^2\n" + } + ], + "prompt_number": 58 + }, + { + "cell_type": "code", + "collapsed": false, + "input": "", + "language": "python", + "metadata": {}, + "outputs": [] + } + ], + "metadata": {} + } + ] +}
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