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Satellite Link Budget Calculators:


Please Note: If you are looking for calculations such as G/T, Eb/No, Antenna Gain, EIRP or C/No then try the 'Useful Calculations' Pages in our 'Tutorials' section.

These are the free online satellite link budget calculators. Simply follow the instructions below to use these calculators. We hope that you find these useful and that you so that you can use them when ever you want.


Fill in the empty boxes within the grey sections and alter any of the existing parameters to match your system requirements. The blue sections will be calculated for you. The existing values are not representative of any particular satellite or antenna but are fairly common values.

By clicking in a parameter box the original data will be cleared so that you can easily enter new values.

When you are ready, click on 'Calculate'.

Click here for a System Noise Temperature Calculator.

NOTE: These Link Budget values and results can be 'Saved' and 'Loaded' for use next time:
Terminal A
Uplink Frequency (GHz)
Tx Antenna diameter (m)
Tx Antenna Efficiency
Tx forward power (dBW)
Tx Bandwidth (KHz)
TX Antenna gain (dBi)
Uplink path loss (dB)
Uplink C/N (dB/Hz)
Satellite G/T
Satellite EIRP
Satellite Range
Satellite PFD
Uplink C/N
Downlink C/N
Terminal B
Downlink frequency (GHz)
Rx Antenna diameter (m)
Rx Antenna Efficiency
System RX noise Temp. (dBK)
Weather Margin (dB)
RX Antenna gain (dBi)
RX Antenna G/T (dB/K)
Downlink path loss (dB)
Downlink C/N (dB/Hz)


For more advanced users, here is a more detailed link budget calculator. To use this you will need to know many more parameters for the Transmitter, Receiver and Satellite. As above, fill in the grey sections and the blue sections will be calculated for you. Click Here for a step by step Link Budget guide..


NOTE: These Link Budget values and results can be 'Saved' and 'Loaded' for use next time:
Terminal A
Terminal B
Tx Freq GHz Transl Freq MHz Rx Freq GHz
EIRP dBm EIRP dBm C/No dB/Hz
G/T dB/K G/T dB/K G/T dB/K
Lat deg C/No Sat dB/Hz Lat deg
Long deg Long deg Long deg
Elevation deg Ant Gain dBi Elevation deg
Azimuth deg Transp Gain dB Azimuth deg
Path Loss dB Req'd EIRP dBm Path Loss dB
Losses dB % EIRP % Losses dB
Margin dB Pwr @ Sat dBW Margin dB
    Data Rate    
    Eb/No Req'd    
    Link Margin    


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