1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
|
{
"metadata": {
"name": ""
},
"nbformat": 3,
"nbformat_minor": 0,
"worksheets": [
{
"cells": [
{
"cell_type": "heading",
"level": 1,
"metadata": {},
"source": [
"Chapter 16 Microwaves and Lasers"
]
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"Example 16.1 Page no 753"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"#given\n",
"h=0.3 #curve depth of parabolic reflector\n",
"D=3 #diameter of parabolic reflector\n",
"\n",
"#calculation\n",
"f=D/(16*h) #focal \n",
"\n",
"#result\n",
"print\"The focal length is \",f,\" m out from the center of the parabolic reflector\"\n",
"\n"
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"The focal length is 0.625 m out from the center of the parabolic reflector\n"
]
}
],
"prompt_number": 1
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"Example 16.2 Page no 755"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"#given\n",
"D=3.0 #diameter of microwave dish\n",
"k=0.6 #efficiency of reflector\n",
"c=2.997925*10**8 #velocity of light\n",
"f=10.0*10**9 #frequency\n",
"\n",
"#calculation\n",
"import math\n",
"Ap=10*math.log10((c/f)*k*((math.pi*D)**2/(c/f)**2)) #powergain\n",
"B=(70*(c/f))/D #beamwidth\n",
"\n",
"#result\n",
"print\"beamwidth = \",round(B,3),\"micrometer\"\n"
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"beamwidth = 0.7 micrometer\n"
]
}
],
"prompt_number": 2
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"Example 16.3 Page no 756"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"#given\n",
"D=4.5 #diameter of parabolic reflector\n",
"k=0.62 #efficiency factor\n",
"\n",
"#calculation\n",
"import math\n",
"Ae=(k*math.pi)*(D/2.0)**2 #aperture efficiency\n",
"i=(math.pi*(D/2.0)**2) #ideal capture area\n",
"\n",
"#result\n",
"print\"The ideal capture area for\",D,\"m\",\"1f m parabolic antenna is\",round(i,3),\"sq.m\"\n"
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"The ideal capture area for 4.5 m 1f m parabolic antenna is 15.904 sq.m\n"
]
}
],
"prompt_number": 5
}
],
"metadata": {}
}
]
}
|
