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author | Trupti Kini | 2017-03-07 09:55:18 +0600 |
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committer | Trupti Kini | 2017-03-07 09:55:18 +0600 |
commit | 7b201e8b044eef00f72b3c7638812b0462a93375 (patch) | |
tree | 840011918e107c8bfc8f33e23af35c5e163fafe7 /Electronic_Communication_Systems_by_Roy_Blake/Chapter14.ipynb | |
parent | c984dee5c1ff671922461e6c9178e96b44cd7204 (diff) | |
download | Python-Textbook-Companions-7b201e8b044eef00f72b3c7638812b0462a93375.tar.gz Python-Textbook-Companions-7b201e8b044eef00f72b3c7638812b0462a93375.tar.bz2 Python-Textbook-Companions-7b201e8b044eef00f72b3c7638812b0462a93375.zip |
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A Electric_Drives_Concepts_And_Applications_by_Vedam_Subrahmanyam/Chapter01.ipynb
A Electric_Drives_Concepts_And_Applications_by_Vedam_Subrahmanyam/Chapter03.ipynb
A Electric_Drives_Concepts_And_Applications_by_Vedam_Subrahmanyam/Chapter04.ipynb
A Electric_Drives_Concepts_And_Applications_by_Vedam_Subrahmanyam/Chapter05.ipynb
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A Electronic_Communication_Systems_by_Roy_Blake/Chapter1.ipynb
A Electronic_Communication_Systems_by_Roy_Blake/Chapter12.ipynb
A Electronic_Communication_Systems_by_Roy_Blake/Chapter13.ipynb
A Electronic_Communication_Systems_by_Roy_Blake/Chapter14.ipynb
A Electronic_Communication_Systems_by_Roy_Blake/Chapter15.ipynb
A Electronic_Communication_Systems_by_Roy_Blake/Chapter16.ipynb
A Electronic_Communication_Systems_by_Roy_Blake/Chapter17.ipynb
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A Electronic_Communication_Systems_by_Roy_Blake/Chapter2.ipynb
A Electronic_Communication_Systems_by_Roy_Blake/Chapter20.ipynb
A Electronic_Communication_Systems_by_Roy_Blake/Chapter21.ipynb
A Electronic_Communication_Systems_by_Roy_Blake/Chapter22.ipynb
A Electronic_Communication_Systems_by_Roy_Blake/Chapter23.ipynb
A Electronic_Communication_Systems_by_Roy_Blake/Chapter24.ipynb
A Electronic_Communication_Systems_by_Roy_Blake/Chapter25.ipynb
A Electronic_Communication_Systems_by_Roy_Blake/Chapter3.ipynb
A Electronic_Communication_Systems_by_Roy_Blake/Chapter4.ipynb
A Electronic_Communication_Systems_by_Roy_Blake/Chapter5.ipynb
A Electronic_Communication_Systems_by_Roy_Blake/Chapter6.ipynb
A Electronic_Communication_Systems_by_Roy_Blake/Chapter7.ipynb
A Electronic_Communication_Systems_by_Roy_Blake/Chapter8.ipynb
A Electronic_Communication_Systems_by_Roy_Blake/Chapter9.ipynb
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A Engineering_Mechanics:_Statics_&_Engineering_Mechanics:_Dynamics_by_Meriam,_J._L.,_&_Kraige,_L._G./CHAPTER1.ipynb
A Engineering_Mechanics:_Statics_&_Engineering_Mechanics:_Dynamics_by_Meriam,_J._L.,_&_Kraige,_L._G./CHAPTER2.ipynb
A Engineering_Mechanics:_Statics_&_Engineering_Mechanics:_Dynamics_by_Meriam,_J._L.,_&_Kraige,_L._G./CHAPTER3.ipynb
A Engineering_Mechanics:_Statics_&_Engineering_Mechanics:_Dynamics_by_Meriam,_J._L.,_&_Kraige,_L._G./CHAPTER4.ipynb
A Engineering_Mechanics:_Statics_&_Engineering_Mechanics:_Dynamics_by_Meriam,_J._L.,_&_Kraige,_L._G./CHAPTER5.ipynb
A Engineering_Mechanics:_Statics_&_Engineering_Mechanics:_Dynamics_by_Meriam,_J._L.,_&_Kraige,_L._G./CHAPTER6.ipynb
A Engineering_Mechanics:_Statics_&_Engineering_Mechanics:_Dynamics_by_Meriam,_J._L.,_&_Kraige,_L._G./CHAPTER7.ipynb
A Engineering_Mechanics:_Statics_&_Engineering_Mechanics:_Dynamics_by_Meriam,_J._L.,_&_Kraige,_L._G./CHAPTER8.ipynb
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A Engineering_Mechanics:_Statics_&_Engineering_Mechanics:_Dynamics_by_Meriam,_J._L.,_&_Kraige,_L._G./screenshots/figure3.png
A Engineering_Mechanics_(Statics,_Dynamics),_by_Hibler_and_Gupta/Chapter_10_Moments_of_Inertia.ipynb
A Engineering_Mechanics_(Statics,_Dynamics),_by_Hibler_and_Gupta/Chapter_11__Virtual_Work.ipynb
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A Engineering_Mechanics_by_R.K_Bansal/chapter_1.ipynb
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A Engineering_Mechanics_by_R.K_Bansal/chapter_9.ipynb
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A Introduction_to_Heat_Transfer_by_S._K._Som/Chapter10_ljUjU8j.ipynb
A Introduction_to_Heat_Transfer_by_S._K._Som/Chapter11_5r7Matr.ipynb
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A Strength_Of_Materials_by_S_S_Bhavikatti/chapter_10_pO7WExy.ipynb
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A The_Elements_of_Physical_Chemistry_by_S._Glasstone/Chapter1.ipynb
A The_Elements_of_Physical_Chemistry_by_S._Glasstone/Chapter10.ipynb
A The_Elements_of_Physical_Chemistry_by_S._Glasstone/Chapter11.ipynb
A The_Elements_of_Physical_Chemistry_by_S._Glasstone/Chapter12.ipynb
A The_Elements_of_Physical_Chemistry_by_S._Glasstone/Chapter13.ipynb
A The_Elements_of_Physical_Chemistry_by_S._Glasstone/Chapter14.ipynb
A The_Elements_of_Physical_Chemistry_by_S._Glasstone/Chapter15.ipynb
A The_Elements_of_Physical_Chemistry_by_S._Glasstone/Chapter16.ipynb
A The_Elements_of_Physical_Chemistry_by_S._Glasstone/Chapter17.ipynb
A The_Elements_of_Physical_Chemistry_by_S._Glasstone/Chapter18.ipynb
A The_Elements_of_Physical_Chemistry_by_S._Glasstone/Chapter19.ipynb
A The_Elements_of_Physical_Chemistry_by_S._Glasstone/Chapter4.ipynb
A The_Elements_of_Physical_Chemistry_by_S._Glasstone/Chapter5.ipynb
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A The_Elements_of_Physical_Chemistry_by_S._Glasstone/Chapter8.ipynb
A The_Elements_of_Physical_Chemistry_by_S._Glasstone/Chapter9.ipynb
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diff --git a/Electronic_Communication_Systems_by_Roy_Blake/Chapter14.ipynb b/Electronic_Communication_Systems_by_Roy_Blake/Chapter14.ipynb new file mode 100644 index 00000000..421e7ca8 --- /dev/null +++ b/Electronic_Communication_Systems_by_Roy_Blake/Chapter14.ipynb @@ -0,0 +1,797 @@ +{ + "cells": [ + { + "cell_type": "markdown", + "metadata": {}, + "source": [ + "# Chapter 14 : Transmission lines" + ] + }, + { + "cell_type": "markdown", + "metadata": {}, + "source": [ + "## Example 1 : pg 461" + ] + }, + { + "cell_type": "code", + "execution_count": 1, + "metadata": { + "collapsed": false + }, + "outputs": [ + { + "name": "stdout", + "output_type": "stream", + "text": [ + "The inductance of 1m length is 225.0 nH/m\n" + ] + } + ], + "source": [ + " \n", + "#page no 461\n", + "#prob no. 14.1\n", + "#calculate the inductance\n", + "#A coaxial cable with capacitance=90pF/m & characteristic impedance=50 ohm\n", + "#given\n", + "C=90.*10**-12;Zo=50.;\n", + "#Determination of inductance of 1m length\n", + "#calculations\n", + "L=(Zo**2)*C;\n", + "#results\n", + "print 'The inductance of 1m length is',L*10**9,'nH/m'" + ] + }, + { + "cell_type": "markdown", + "metadata": {}, + "source": [ + "## Example 2 : pg 462" + ] + }, + { + "cell_type": "code", + "execution_count": 2, + "metadata": { + "collapsed": false + }, + "outputs": [ + { + "name": "stdout", + "output_type": "stream", + "text": [ + "a)The characteristic impedance of conductor is 227.399 ohm\n", + "b)The characteristic impedance of coaxial cable is 54.784 ohm\n" + ] + } + ], + "source": [ + " \n", + "#page no 462\n", + "#prob no. 14.2\n", + "#calculate the imepdance \n", + "from math import log10,sqrt\n", + "#a)Determination of impedance of open wire with diameter 3mm & r=10mm\n", + "#given\n", + "D=3./2.;r=10.;#All values are in mm\n", + "#calculations and results\n", + "Zo1=276*log10(r/D); \n", + "print 'a)The characteristic impedance of conductor is',round(Zo1,3),'ohm'\n", + "#b)Determination of impedance of coaxial with er=2.3,inner diameter=2mm & outer diameter=8mm\n", + "er=2.3;D=8.;d=2;#All diameter values in mm\n", + "Zo2=(138/sqrt(er))*log10(D/d);\n", + "print 'b)The characteristic impedance of coaxial cable is',round(Zo2,3),'ohm'" + ] + }, + { + "cell_type": "markdown", + "metadata": {}, + "source": [ + "## Example 3 : pg 463" + ] + }, + { + "cell_type": "code", + "execution_count": 3, + "metadata": { + "collapsed": false + }, + "outputs": [ + { + "name": "stdout", + "output_type": "stream", + "text": [ + "The value of velocity factor is 0.69\n", + "The value of propagation velo. is 207019667.803 m/s\n" + ] + } + ], + "source": [ + " \n", + "#page no 463\n", + "#prob no. 14.3\n", + "#calculate the velocity factor and propagation velocity\n", + "#Cable with teflon dielectric er=2.1\n", + "from math import sqrt\n", + "#given\n", + "er=2.1;c=3.*10**8;#Velocity of light\n", + "#calculations and results\n", + "#Determination of velocity factor\n", + "Vf=1/sqrt(er);\n", + "print 'The value of velocity factor is',round(Vf,3)\n", + "#Determination of propagation velocity\n", + "Vp=Vf*c;\n", + "print 'The value of propagation velo. is',Vp,'m/s'" + ] + }, + { + "cell_type": "markdown", + "metadata": {}, + "source": [ + "## Example 4 : pg 468" + ] + }, + { + "cell_type": "code", + "execution_count": 4, + "metadata": { + "collapsed": false + }, + "outputs": [ + { + "name": "stdout", + "output_type": "stream", + "text": [ + "The total voltage at the load is 0.333 V\n", + "The voltage across the line 0.333 V\n" + ] + } + ], + "source": [ + " \n", + "#page no 468\n", + "#prob no. 14.4\n", + "#calculate the voltage\n", + "#Refer fig. 14.13(a)\n", + "vs=1;#source voltage\n", + "Rs=50.;#source resistance\n", + "Zo=50.;#line impedance\n", + "RL=25.;#load resistance\n", + "l=10.;#length of line\n", + "vf=0.7;#velocity factor\n", + "Vi=0.5;\n", + "c=3.*10**8;#velo of light\n", + "#calculations\n", + "#Vs will divide between Rs and Zo of the line.Since two resistors are equal,the voltage will divide equally.\n", + "#Therefore at t=0,the voltage at the source end of the line will rise from zero to 0.5V. \n", + "#The voltage at the load will remain zero untill the surge reaches it.The time for this is\n", + "T=l/(vf*c);\n", + "# After T sec, the voltage at the load will rise.The reflection coefficient is given as\n", + "refl_coeff=(RL-Zo)/(RL+Zo)\n", + "#Now reflection voltage is \n", + "Vr=refl_coeff * Vi;\n", + "#The total voltage at the load is\n", + "Vt=Vr+Vi;\n", + "# The reflected voltage will propogate back along the line,reaching \n", + "#the source at time 2T.After this the voltage will be 0.3335V all along the line\n", + "#The voltage across the line, and the load will be\n", + "VL=vs*(RL/(RL+Zo));\n", + "#results\n", + "print 'The total voltage at the load is',round(Vt,3),'V'\n", + "print 'The voltage across the line',round(VL,3),'V'" + ] + }, + { + "cell_type": "markdown", + "metadata": {}, + "source": [ + "## Example 5 : pg 472" + ] + }, + { + "cell_type": "code", + "execution_count": 5, + "metadata": { + "collapsed": false + }, + "outputs": [ + { + "name": "stdout", + "output_type": "stream", + "text": [ + "The length reqd for phase shift is 0.12375 m\n" + ] + } + ], + "source": [ + " \n", + "#page no 472\n", + "#prob no. 14.5\n", + "#calculate the length reqd\n", + "#Standard coaxial cable RG-8/U with 45 degree phase shift at 200MHz\n", + "#given\n", + "p=45.;f=200.*10**6;c=3.*10**8;#Speed of light in m/s\n", + "vf=0.66;#velo. factor for this line\n", + "#calculations\n", + "vp=vf*c;#Determination of propagation velo.\n", + "wav=vp/f;#Determination of wavelength of signal\n", + "#Determination of reqd length for 45 degree phase shift\n", + "L=wav*(p/360.);\n", + "#results\n", + "print 'The length reqd for phase shift is',L,'m'" + ] + }, + { + "cell_type": "markdown", + "metadata": {}, + "source": [ + "## Example 6 : pg 476" + ] + }, + { + "cell_type": "code", + "execution_count": 6, + "metadata": { + "collapsed": false + }, + "outputs": [ + { + "name": "stdout", + "output_type": "stream", + "text": [ + "The value of SWR is 2.0\n" + ] + } + ], + "source": [ + " \n", + "#page no 476\n", + "#prob no. 14.6\n", + "#calculate the value of SWR\n", + "#A 50ohm line terminated in 25ohm resistance\n", + "Zo=50.;Zl=25.;\n", + "#calculations\n", + "#Determination of SWR\n", + "SWR=Zo/Zl;#In this case Zo>Zl\n", + "#results\n", + "print 'The value of SWR is',SWR" + ] + }, + { + "cell_type": "markdown", + "metadata": {}, + "source": [ + "## Example 7 : pg 477" + ] + }, + { + "cell_type": "code", + "execution_count": 7, + "metadata": { + "collapsed": false + }, + "outputs": [ + { + "name": "stdout", + "output_type": "stream", + "text": [ + "The amount of power reflected is 12.5 mW\n", + "The power dissipated in load is 37.5 mW\n" + ] + } + ], + "source": [ + " \n", + "#page no 477\n", + "#prob no. 14.7\n", + "#calculate the power\n", + "#A generator sends 50mW at 50ohm line & reflection coeff I=0.5\n", + "#given\n", + "Pi=50.;I=0.5;\n", + "#calculations\n", + "#Determination of amount of power reflected\n", + "Pr=(I**2)*Pi;\n", + "#Determination of remainder power that reaches load\n", + "Pl=Pi-Pr;\n", + "#results\n", + "print 'The amount of power reflected is',Pr,'mW'\n", + "print 'The power dissipated in load is',Pl,'mW'" + ] + }, + { + "cell_type": "markdown", + "metadata": {}, + "source": [ + "## Example 8 : pg 478" + ] + }, + { + "cell_type": "code", + "execution_count": 8, + "metadata": { + "collapsed": false + }, + "outputs": [ + { + "name": "stdout", + "output_type": "stream", + "text": [ + "The power absorbed by load is 44.444 W\n" + ] + } + ], + "source": [ + " \n", + "#page no 478\n", + "#prob no. 14.8\n", + "#A transmitter supplies 50W with SWR 2:1\n", + "#calculate the power\n", + "#given \n", + "Pi=50.;SWR=2.;\n", + "#calculations\n", + "#Determination of power absorbed by load\n", + "Pl=(4*SWR*Pi)/(1+SWR)**2;\n", + "#results\n", + "print 'The power absorbed by load is',round(Pl,3),'W'" + ] + }, + { + "cell_type": "markdown", + "metadata": {}, + "source": [ + "## Example 9 : pg 480" + ] + }, + { + "cell_type": "code", + "execution_count": 9, + "metadata": { + "collapsed": false + }, + "outputs": [ + { + "name": "stdout", + "output_type": "stream", + "text": [ + "The impedance looking toward the load (40-30j) ohm\n" + ] + } + ], + "source": [ + " \n", + "# page no 545\n", + "# prob no 14.9\n", + "#calculate the impedance\n", + "from math import pi,tan\n", + "#given\n", + "Zo=50.;# line impedence in ohm\n", + "ZL=100.;# load impedance in ohm\n", + "vf=0.8;#velocity factor\n", + "l=1.;#length of line\n", + "f=30.*10**6;# freq of operation\n", + "c=3.*10**8;#velo of light\n", + "#calculations\n", + "# we have to find the length of line in degree\n", + "wl=vf*c/f#wavelength\n", + "# Then the length of line in degree is\n", + "ang=l/wl*360\n", + "# calculation of impedance\n", + "Z=Zo*(ZL+(1j*Zo*tan(ang*pi/180)))/(Zo+(1j*ZL*tan(ang*pi/180.)));\n", + "print 'The impedance looking toward the load',Z,'ohm'" + ] + }, + { + "cell_type": "markdown", + "metadata": {}, + "source": [ + "## Example 10 : pg 481" + ] + }, + { + "cell_type": "code", + "execution_count": 10, + "metadata": { + "collapsed": false + }, + "outputs": [ + { + "name": "stdout", + "output_type": "stream", + "text": [ + "The length should be 0.1425 m\n" + ] + } + ], + "source": [ + " \n", + "#page no 481\n", + "#prob no. 14.10\n", + "#calculate the length required\n", + "#A series tuned ckt tuned at 1GHz\n", + "#given\n", + "vf=0.95;c=3.*10**8;f=10**9;\n", + "#calculations\n", + "vp=vf*c;#determination of propagation velo.\n", + "wav=vp/f;#Determination of wavelength \n", + "#Determination of length\n", + "L=wav/2;#Since half wavelength section wiil be series resonant\n", + "#results\n", + "print 'The length should be',L,'m'" + ] + }, + { + "cell_type": "markdown", + "metadata": {}, + "source": [ + "## Example 11 : pg 481" + ] + }, + { + "cell_type": "code", + "execution_count": 11, + "metadata": { + "collapsed": false + }, + "outputs": [ + { + "name": "stdout", + "output_type": "stream", + "text": [ + "The transmitter power must be 151.356 W\n" + ] + } + ], + "source": [ + " \n", + "#page no 481\n", + "#prob no. 14.10\n", + "#calculate the transmitter power\n", + "#A Tx deliver 100W to antenna through 45m coaxial cable with loss=4dB/100m\n", + "#given\n", + "loss=4./100;L=45.;Pout=100.;\n", + "#calculations\n", + "loss_dB=L*loss;#Determination of loss in dB\n", + "Pin_Pout=10**(loss_dB/10);\n", + "#Determination of Tx power\n", + "Pin=Pout*Pin_Pout;\n", + "#results\n", + "print 'The transmitter power must be',round(Pin,3),'W'" + ] + }, + { + "cell_type": "markdown", + "metadata": {}, + "source": [ + "## Example 13 : pg 490" + ] + }, + { + "cell_type": "code", + "execution_count": 13, + "metadata": { + "collapsed": false + }, + "outputs": [ + { + "name": "stdout", + "output_type": "stream", + "text": [ + "Input impedance is (19.36+5.44j) ohm\n" + ] + } + ], + "source": [ + " \n", + "#page no 490\n", + "#prob no. 14.13\n", + "#calculate the input impedance\n", + "Zo=50.;#line impedance in ohm\n", + "f=100.*10**6;#operating freq\n", + "vf=0.7;#velocity factor\n", + "L=6.;#length in m\n", + "c=3.*10**8;#velo of light\n", + "ZL=50+1j*50;#load impedance in ohm\n", + "#calculations\n", + "# we have to calculate length in degree,so for this first find wl\n", + "wl=vf*c/f;#wavength in m\n", + "ang=360*L/wl;\n", + "# now from the graph input impedance is 19.36+%i5.44;\n", + "Zi=19.36+1j*5.44;\n", + "#results\n", + "print 'Input impedance is',Zi,'ohm'" + ] + }, + { + "cell_type": "markdown", + "metadata": {}, + "source": [ + "## Example 14 : pg 492" + ] + }, + { + "cell_type": "code", + "execution_count": 14, + "metadata": { + "collapsed": false + }, + "outputs": [ + { + "name": "stdout", + "output_type": "stream", + "text": [ + "The required turn ratio is (0.752156137344+0j)\n" + ] + } + ], + "source": [ + " \n", + "#page no 492\n", + "#prob no. 14.14\n", + "from cmath import sqrt\n", + "#given\n", + "Zo=50.;#line impedance in ohm\n", + "ZL=75.+1j*25;\n", + "# the requirment of this is simply to match the 50ohm line to the impedsnce at this point on the line,which is 88.38 ohm,resistive.\n", + "Z2=88.38;#in ohm\n", + "#calculations\n", + "#The required turn ratio is\n", + "N1_N2=sqrt(Zo/Z2);\n", + "#results\n", + "print 'The required turn ratio is',N1_N2" + ] + }, + { + "cell_type": "markdown", + "metadata": {}, + "source": [ + "## Example 15 : pg 494" + ] + }, + { + "cell_type": "code", + "execution_count": 15, + "metadata": { + "collapsed": false + }, + "outputs": [ + { + "name": "stdout", + "output_type": "stream", + "text": [ + "Zo = 66.476\n" + ] + } + ], + "source": [ + " \n", + "#page no 494\n", + "#prob no. 14.15\n", + "#calculate the impedance\n", + "# refer prob no 14.14\n", + "from math import sqrt\n", + "#given\n", + "Zo=50.;#line impedance in ohm\n", + "Z2=88.38;#in ohm\n", + "#calculations\n", + "Zo_=sqrt(Zo*Z2);\n", + "#results\n", + "print 'Zo = ',round(Zo_,3)" + ] + }, + { + "cell_type": "markdown", + "metadata": {}, + "source": [ + "## Example 16 : pg 494" + ] + }, + { + "cell_type": "code", + "execution_count": 16, + "metadata": { + "collapsed": false + }, + "outputs": [ + { + "name": "stdout", + "output_type": "stream", + "text": [ + "Capacitance is 2.12206590789e-11 F\n" + ] + } + ], + "source": [ + " \n", + "#page no 494\n", + "#prob no. 14.16\n", + "#calculate the capacitance\n", + "from math import pi\n", + "#given\n", + "Zo=50.;#line impedance in ohm\n", + "f=100.*10**6;#operating freq in Hz\n", + "ZL1=50+1j*75;# load impedance with Xc=75\n", + "Xc=75;\n", + "#calculations\n", + "# Capacitance in farads is given as\n", + "C=1/(2*pi*f*Xc);\n", + "#results\n", + "print 'Capacitance is',C,'F'" + ] + }, + { + "cell_type": "markdown", + "metadata": {}, + "source": [ + "## Example 17 : pg 497" + ] + }, + { + "cell_type": "code", + "execution_count": 17, + "metadata": { + "collapsed": false + }, + "outputs": [ + { + "name": "stdout", + "output_type": "stream", + "text": [ + "The value of stude is 0.014 S\n" + ] + } + ], + "source": [ + " \n", + "#page no 497\n", + "#prob no. 14.17\n", + "#calculate the value of stude\n", + "#given\n", + "Zo=72.;#line impedance in ohm\n", + "ZL=120.-1j*100;#load impedance\n", + "#calculations\n", + "#The stub must be inserted at a point on the line where the real part of the load admittance is correct. This value is\n", + "s=1/Zo;\n", + "#results\n", + "print 'The value of stude is',round(s,3),'S'" + ] + }, + { + "cell_type": "markdown", + "metadata": {}, + "source": [ + "## Example 18 : pg 501" + ] + }, + { + "cell_type": "code", + "execution_count": 18, + "metadata": { + "collapsed": false + }, + "outputs": [ + { + "name": "stdout", + "output_type": "stream", + "text": [ + "The distance is 168.0 m\n" + ] + } + ], + "source": [ + " \n", + "#page no 501\n", + "#prob no. 14.18\n", + "#calculate the distance\n", + "#given\n", + "#A TDR display shows dscontinuity at 1.4us & vf=0.8\n", + "t=1.4*10**-6;vf=0.8;c=3.*10**8;#Speed of light\n", + "#Determination of distance of fault\n", + "#calculations\n", + "d=(vf*c*t)/2;#One-half time is used to calculate\n", + "#results\n", + "print 'The distance is',d,'m'" + ] + }, + { + "cell_type": "markdown", + "metadata": {}, + "source": [ + "## Example 19 : pg 503" + ] + }, + { + "cell_type": "code", + "execution_count": 19, + "metadata": { + "collapsed": false + }, + "outputs": [ + { + "name": "stdout", + "output_type": "stream", + "text": [ + "The wavelength is 46.0 cm\n", + "The freq is 619.565 MHz\n" + ] + } + ], + "source": [ + " \n", + "#page no 503\n", + "#prob no. 14.19\n", + "#calculate the wavelength and freq\n", + "#given\n", + "#2 adjacent minima on slotted are 23cm apart with velo factor=95%\n", + "L=23*10**-2;vf=0.95;c=3*10**8;#Velo. of light in m/s\n", + "#calculations and results\n", + "#Determination of wavelength\n", + "wav=2*L;#Minima are seperated by one-half wavelength\n", + "print 'The wavelength is',wav*100,'cm'\n", + "#Determination of freq.\n", + "f=(vf*c)/wav;#vp=vf*c\n", + "print 'The freq is' ,round(f/10**6,3),'MHz'" + ] + }, + { + "cell_type": "markdown", + "metadata": {}, + "source": [ + "## Example 20 : pg 504" + ] + }, + { + "cell_type": "code", + "execution_count": 20, + "metadata": { + "collapsed": false + }, + "outputs": [ + { + "name": "stdout", + "output_type": "stream", + "text": [ + "The value of SWR is 2.15\n" + ] + } + ], + "source": [ + " \n", + "#page no 504\n", + "#prob no. 14.20\n", + "#calculate the value of SWR\n", + "from math import sqrt\n", + "#given\n", + "#Frwd power in Tx line is 150W,Reverse power=20W\n", + "Pi=150.;Pr=20.;#All power in watt\n", + "#calculations\n", + "#Determination of SWR\n", + "SWR=(1+sqrt(Pr/Pi))/(1-sqrt(Pr/Pi));\n", + "#results\n", + "print 'The value of SWR is',round(SWR,3)" + ] + } + ], + "metadata": { + "kernelspec": { + "display_name": "Python 2", + "language": "python", + "name": "python2" + }, + "language_info": { + "codemirror_mode": { + "name": "ipython", + "version": 2 + }, + "file_extension": ".py", + "mimetype": "text/x-python", + "name": "python", + "nbconvert_exporter": "python", + "pygments_lexer": "ipython2", + "version": "2.7.11" + } + }, + "nbformat": 4, + "nbformat_minor": 0 +} |