Satellite Link Budget Calculator

Calculate EIRP, free space loss, received power, carrier-to-noise ratio, and link margin for satellite communication links.

Transmit Power

Transmit Antenna Gain

dBi

Frequency

GHz

Link Distance

Receive Antenna Gain

dBi

System Noise Temperature

Bandwidth

MHz

Tab to move between fields

EIRP

40 dBW

Carrier-to-Noise (C/N)

3.25 dB

Free Space Loss205.16 dB

Received Power-125.16 dBW

Link Margin-6.75 dB

How to Use This Calculator

Enter transmit power (dBW or W) and transmit antenna gain (dBi).
Set operating frequency (GHz), link distance (km), and receive antenna gain (dBi).
Enter system noise temperature (K) for the receiving system.
Review EIRP (dBW), free-space path loss (dB), received power (dBW), and carrier-to-noise ratio (dB).
Ensure link margin is positive (typically ≥3 dB) to maintain reliable communications.

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