 |
|
|
 |
||
|
|
|
|
|
||
| Contents | Previous page | Next page |
1.Down Link frequency
Down link frequency is
frequency at which satellite is communicating with ground station. For C band
up link frequency is in the order of
4 G Hz , 12 G Hz for Ku band.
2.Downlink path loss Down link path
loss depend on up link frequency & distance between satellite and ground
station.
Down
link loss=10 log(4pd/(C/f))2
‘d’ is the distance between satellite & ground station
‘f’ is the frequency of the down link wave
‘C’ is the velocity of the light = 3 x108 m/Sec
Down link loss = 20 log (4pd/(3/10*f)………(dB)………………[11]
Here f
is in Giga hertz
|
Example : calculate downlink path loss for the
satellite located 37000 km far from the earth station and operating 3,950
GHz frequency |
|
Web design by AnandSoft |