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{
"metadata": {
"name": "",
"signature": "sha256:f6d3766ede10d7f012eb8ad865bad8af32df466b5fa260a3ac4557604c5c1440"
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"worksheets": [
{
"cells": [
{
"cell_type": "heading",
"level": 1,
"metadata": {},
"source": [
"Chapter13, Antenna Measurement"
]
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"Example No. 13.4.1, page : 13-10"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"from math import log10, pi\n",
"from __future__ import division\n",
"Pr1=0.0297/1000 #W(Recieved power)\n",
"Pr2=0.0471/1000 #W(Recieved power)\n",
"Pr3=0.0374/1000 #W(Recieved power)\n",
"Pt=1 #W(Transmitted power)\n",
"R=10 #m(Radius)\n",
"f=980 #MHz(Frequency)\n",
"f=f*10**6 #Hz(Frequency)\n",
"c=3*10**8 #m/s(Speed of light)\n",
"lamda=c/f #m(Wavelength)\n",
"A=20*log10(4*pi*R/lamda)+10*log10(Pr1/Pt) #(A=G1dB+G2dB)\n",
"B=20*log10(4*pi*R/lamda)+10*log10(Pr2/Pt) #(B=G1dB+G3dB)\n",
"C=20*log10(4*pi*R/lamda)+10*log10(Pr3/Pt) #(C=G2dB+G3dB)\n",
"G1dB=(A+B-C)/2 \n",
"G2dB=(A-B+C)/2 \n",
"G3dB=(-A+B+C)/2 \n",
"print \"Gain of antennas, G1db, G2dB & G3dB(in dB) are : %0.f, %0.f & %0.f\"%(round(G1dB),round(G2dB),round(G3dB))"
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"Gain of antennas, G1db, G2dB & G3dB(in dB) are : 4, 3 & 5\n"
]
}
],
"prompt_number": 3
}
],
"metadata": {}
}
]
}
|
