ADTRAN TRACER User Manual page 32

P 22
AGE
S 2
ECTION
A G
NTENNA AIN
Best performance will result from the use of a parabolic dish
antenna. Antenna gain is determined by the size of the dish, with
typical figures detailed below. Dish manufacturers will be able to
supply gains for other types of antenna.
P L
ATH OSS
The free space path loss is given by
where
D is distance in miles
f is operating frequency in GHz
A tabulation of various path loss is given below.
Link Distance
(in miles)
1 ........................... 104
2 ........................... 110
3 ........................... 114
4 ........................... 116
5 ........................... 118
6 ........................... 120
7 ........................... 121
8 ........................... 122
9 ........................... 123
10 ......................... 124
11 ......................... 125
12 ......................... 126
Dish Diameter
(in feet)
2 ...................... 21
4 ...................... 27
6 ...................... 31
8 ...................... 33
10 ..................... 35
12 ..................... 37
Loss(dB) = 96.6 + 20 log
Path Loss Link Distance
(in dB) (in miles)
13 ......................... 126
14 ......................... 127
15 ......................... 128
16 ......................... 128
17 ......................... 129
18 ......................... 129
19 ......................... 129
20 ......................... 130
21 ......................... 130
22 ......................... 131
23 ......................... 131
24 ......................... 132
61280.003L1-1B
Gain
(in dBi)
f + 20log D
10 10
Path Loss
(in dB)
4/12/99