Friis Formula Calculator
Calculate received power, free space path loss, and link budget using the Friis transmission equation.
Link Parameters
Pr = Pt + Gt + Gr - FSPL
FSPL = 20 log10(4 pi d / lambda)
Received Power
-30.05 dBm
988.10 nW
80.05
FSPL (dB)
20
Total Gain (dB)
Link Budget Breakdown
TX Power+30.00 dBm
TX Antenna Gain+10.00 dBi
Free Space Path Loss-80.05 dB
RX Antenna Gain+10.00 dBi
Received Power-30.05 dBm
Link Margins
@ -80 dBm (Basic RF)+49.9 dB
@ -90 dBm (Good receiver)+59.9 dB
@ -100 dBm (Sensitive)+69.9 dB
@ -110 dBm (Very sensitive)+79.9 dB
Additional Parameters
Wavelength12.49 cm
Effective Aperture124.1678 cm^2
Power Density @ RX7.958e-5 W/m^2