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| author | nice | 2014-10-09 18:07:00 +0530 |
|---|---|---|
| committer | nice | 2014-10-09 18:07:00 +0530 |
| commit | 36a03d6d76bac315dba73b2ba9555c7e3fe0234f (patch) | |
| tree | 7e46e8873a7c92be2eef962a36e664c775aa6bf2 /Modern_Electronics_Communication/chapter14.ipynb | |
| parent | b8bb8bbfa81499ad7fc3f3508be257da65f543af (diff) | |
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updated books
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| -rwxr-xr-x | Modern_Electronics_Communication/chapter14.ipynb | 180 |
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diff --git a/Modern_Electronics_Communication/chapter14.ipynb b/Modern_Electronics_Communication/chapter14.ipynb new file mode 100755 index 00000000..39f00cfe --- /dev/null +++ b/Modern_Electronics_Communication/chapter14.ipynb @@ -0,0 +1,180 @@ +{
+ "metadata": {
+ "name": ""
+ },
+ "nbformat": 3,
+ "nbformat_minor": 0,
+ "worksheets": [
+ {
+ "cells": [
+ {
+ "cell_type": "heading",
+ "level": 1,
+ "metadata": {},
+ "source": [
+ "Chapter 14 Antennas"
+ ]
+ },
+ {
+ "cell_type": "heading",
+ "level": 2,
+ "metadata": {},
+ "source": [
+ "Example 14.1 Page no 669"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "#given\n",
+ "c=3*10**8 #m/s , speed of light \n",
+ "f=150*10**6 #frequency\n",
+ "\n",
+ "#calculation\n",
+ "h=c/f\n",
+ "x=1/2.0 #antennas dimension(D)\n",
+ "D=0.5*2\n",
+ "Rff=5*D\n",
+ "h=c/f \n",
+ "D = h/2\n",
+ "\n",
+ "#result\n",
+ "print\" distance =\",Rff,\"m\"\n"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ " distance = 5.0 m\n"
+ ]
+ }
+ ],
+ "prompt_number": 2
+ },
+ {
+ "cell_type": "heading",
+ "level": 2,
+ "metadata": {},
+ "source": [
+ "Example 14.2 Page no 669"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "#given\n",
+ "c=3*10**8 #velocity of light\n",
+ "f=12.0*10**9 #frequency\n",
+ "D=4.5 #diameter of parabolic reflector\n",
+ "\n",
+ "#calculation\n",
+ "h=c/f #wavelength\n",
+ "x=D/h\n",
+ "R=(2*D**2)/h\n",
+ "\n",
+ "#result\n",
+ "print\"distance from parabolic reflector= \",R,\"m\""
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "distance from parabolic reflector= 1620.0 m\n"
+ ]
+ }
+ ],
+ "prompt_number": 3
+ },
+ {
+ "cell_type": "heading",
+ "level": 2,
+ "metadata": {},
+ "source": [
+ "Example 14.3 Page no 671"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "#given\n",
+ "Pt=10 #transmitted power\n",
+ "#dipoles have gain 2.15dB \n",
+ "Gr=1.64\n",
+ "c=3*10**8 #velocity of light\n",
+ "f=144.0*10**6 #frequency\n",
+ "d=50*10**3 #distance between antennas\n",
+ "Gt=1.64 #recieving antenna gain(ratio) compared to isotropic radiator\n",
+ "\n",
+ "#calculation\n",
+ "import math\n",
+ "Pr=Pt*Gt*Gr*(c/f)**2/((16*(math.pi)**2)*(d**2)) #power recieved\n",
+ "\n",
+ "#result\n",
+ "print\"Power received = \",round(Pr,12),\"w\"\n",
+ "\n"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "Power received = 2.96e-10 w\n"
+ ]
+ }
+ ],
+ "prompt_number": 2
+ },
+ {
+ "cell_type": "heading",
+ "level": 2,
+ "metadata": {},
+ "source": [
+ "Example 14.4 Page no 674"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "#Given\n",
+ "c=3*10**8 #velocity of light\n",
+ "f=100*10**6 #frequency\n",
+ "\n",
+ "#Calculation\n",
+ "h=c/f #wavelength\n",
+ "x=h/2.0 #dipole i.e h/2\n",
+ "l=0.95*x #applying 95% correction,the actual optimum physical length\n",
+ "L=486/100.0 #alternative method to find length\n",
+ "\n",
+ "#Result\n",
+ "print\"length of antenna = \",l,\"m\"\n"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "length of antenna = 1.425 m\n"
+ ]
+ }
+ ],
+ "prompt_number": 1
+ }
+ ],
+ "metadata": {}
+ }
+ ]
+}
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