Pasternack's Friis Transmission Equation Calculator with formula will calculate the received power from an antenna at some distance given a transmission frequency and antenna gains. The Friis path loss formula calculator is also derived here as well.

Note:  Equation 1 below uses linear power units (mW/W), while Equation 2 uses dBm/dBW.

Calculation

 
 
 
 
 
 
 
 
 
 
 

Result:

Received Power:

Friis Equation is used to find the ideal power received at an antenna from basic information about the transmission. The only inherent pitfall of Friis equation formula is the fact that it is only calculated for a single frequency, where transmissions are typically comprised of many. However, given a high enough center frequency, the difference in received power over the bandwidth should be reasonably small.

Prefix Symbol Value
Tera 'T' 1012
Giga 'G' 109
Mega 'M' 106
kilo 'k' 103
Prefix Symbol Value
pico 'p' 10-12
nano 'n' 10-9
micro 'u' 10-6
milli 'm' 10-3

Pasternack is a leading manufacturer and supplier of RF, microwave and millimeter-wave products. Several key industries around the world continue to rely on our products, including avionics, military electronics, IFF, SATCOM, ECM, industrial/manufacturing and oil/gas.

When designers and engineers need solutions to complex RF-related products and design queries that crop up regularly during the planning or designing phase of their projects, our online RF calculators are the right choice including our Friis transmission calculator tool.

Pasternack free-to-use radio frequency calculators, including conversion calculators, RF product calculators and general calculators with formulas, allow designers and engineers an easy-to-use tool that allows them to convert complex mathematical formulas to simple conversions.

Designed to provide solutions to real-world challenges, our RF. Microwave and mmWave calculators include link budget, coax impedance, RF power conversion (such as dBi and dBm to Watts), attenuation, frequency, wavelength, VSWR/return loss, torque, noise, Free Space Path Loss (FSPL), unit conversion, microstrip and plenty more.

When you want to find the ideal power received from basic information about the transmitter, our Friis Transmission Equation Calculator will calculate the received power from an antenna at some distance given a transmission frequency and antenna gains. While it can only calculate for a single frequency where transmission is typically comprised of many, given the high enough center frequency, the difference in received power over the bandwidth is reasonably small.

In each of our product-oriented calculators where applicable, the user can plug in the variables for their desired calculations into the formula. Based on those results, the calculator will highlight a 'Find Related Products' button that will direct you to our products that meet your specific criteria.

Pasternack RF calculators, including the antenna Friis Transmission Calculator, allow you to input the SI prefix.

Our large selection of RF calculators with formulas is part of our online technical resource library, and further complements the Engineers Resource Center section.

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