Satellite Communication Link Budget Calculator

Satellite Link Budget Calculator page:

Complete all white boxes and then click calculate button to obtain results in the green boxes.

1.calculation of uplink path loss
Uplink frequency GHz
Range (35778 - 41679) km
Uplink path loss dB

2.calculation of transmitting antenna gain
Uplink antenna diameter m
Uplink antenna aperture efficiency e.g. 0.65
Uplink antenna transmit gain dBi

3.calculation of transmit EIRP & operating flux dencity
Transmit power per carrier(W)
Transmitter feader losses(dB)
Antenna pointing loss
No of carriers
Amplifier back off
Transmit EIRP dBW
Uplink pfd at satellite dBW/m^2
Power rating of ground transmitter

4.Calculation of uplink to noise ratio
Up link rain attenuation
Satellite uplink G/T dB/K
Uplink C/N dB

5.Calculation of satellite operating down link eirp
Saturated EIRP (dB W)
Saturated EIRP (watts)
Saturation FD (dB/sq.m)
Output back off (dB0
In put back off (dB)
Satellite operating downlink EIRP dBW
Satellite operating down link EIRP (watts)

6.Calculation of satellite operating band width
Input data rate(Kb/S)
Link overhead factor(%)(worst case)
FEC rate coding
Bits/symbol (m)
Effective in put data rate
Transmission rate
Bandwidth Hz

7.Calculation of down link path loss
Downlink frequency GHz
Downlink path loss dB

8.Calculation of receiver antenna gain
Downlink receive antenna diameter m
Downlink receive antenna aperture efficiency e.g. 0.65
Downlink receive antenna gain dBi

9.Calculation of reciver G/T
Antenna elevation angle(deg)
Antenna noise temp(K)
Increase in noise temperature due to rain(K)
LNA noise temp (K)
System noise temp(k)
Downlink receive antenna G/T dB/K

10.Calculation of link margin
Down link rain attenuation (dB)
Receive antenna pointing loss(dB)
Eb/No Required for BER of 1/10^7
Downlink C/N (dB Hz)
Overall down-link C/No [dB Hz]
Available Eb/No
Available link margin