Microwave Link Calculator
Path clearance, fade margin, and availability.
Inputs
Results
Fade margin (dB)
21.92
Received signal (dBm)-48.08
Availability (%)99.9
Annual outage (min)513.06
Free-space path loss (dB)141.08
System gain (dB)163
1st Fresnel zone radius (m)7.91
Rain attenuation (dB)295.94
How to Use This Calculator
- Enter the frequency in GHz, the antenna diameter in meters for each end, and the link distance in km.
- Input the transmit power in dBm and the required receiver sensitivity in dBm.
- Set the rain zone for your geographic region to apply ITU-R rain fade margin.
- Review the Free Space Path Loss, System Gain, Fade Margin, and Link Availability percentage.
- Target a fade margin of at least 30 dB for 99.999% link availability in high-rain zones.
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