Satellite Link Budget Calculator

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

Uplink frequency GHz
Uplink antenna diameter m
Uplink antenna aperture efficiency e.g. 0.65
Uplink antenna transmit gain dBi
Uplink antenna, power at the feed W
Uplink EIRP dBW
Range (35778 - 41679) km
Uplink path loss dB
Uplink pfd at satellite dBW/m^2
Bandwidth Hz
Satellite uplink G/T dB/K
Uplink C/N dB

Downlink frequency GHz
Downlink receive antenna diameter m
Downlink receive antenna aperture efficiency e.g. 0.65
Downlink system noise temperature (antenna+LNA) K
Downlink receive antenna gain dBi
Downlink receive antenna G/T dB/K
Downlink satellite EIRP dBW
Downlink path loss dB
Downlink C/N dB

Uplink C/interference dB
Uplink C/N dB
Satellite C/intermod dB
Downlink C/N dB
Downlink C/interference dB
Total link C/N dB

The following lead to pre-calculated satellite link budget with useful default parameters inserted which may be amended and then recalculated.

SCPC / DAMA 8kbit/s mesh network satellite link budget for 1.8m antennas - Skylinx
Digital TV television broadcasting - MPEG satellite link budget
Data broadcasting or data distribution satellite link budget
Line of sight link radio budget - one way - single hop
Satellite mobile phone link budget - return link from mobile to hub
Europe to Africa - Satellite internet broadband outlink
Africa to Europe - Satellite internet TDMA return link
For deep space link range radio range calculations this SETI range calculator is fun to try.

Explanation of satellite links   How to measure EbNo and EbNo calculator

Details of services in each ocean region:
Broadband satellite internet access service for US, Caribbean and South America
Broadband direct satellite internet access service for Egypt, Iraq, the Middle East
Satellite internet and satellite VoIP communications access for Africa
Australia and Asia broadband satellite access service providers

Satellite finder: Calculate dish aiming and pointing angles for any site


Any problems or comments please e-mail Eric Johnston
Copyright 1 Jan 1999 Satellite Signals Ltd All Rights Reserved
Last Revision: 28 April 2008