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Friis Path Loss Calculator

See our other Electronics Calculators.

This calculator computes the power that a receiving antenna receives for a given transmitting antenna for a given power for a distance greater than one wavelength for line of sight transmission.  The greater the frequency the greater the path loss. 

Input:
Ptx (dB)
lambda (wavelength), OR
f (frequency)
(m)  OR
(MHz)
d (Distance)  (m)
Gtx (dB)
Grx (dB)

Prx (dB)

Equations:

Prx= Ptx*Gtx*Grx*( (lambda)/(4*PI*d) )^2

OR in dB

Prx= Ptx(dB)+ Gtx(dB)+ Grx(dB)  -  20log(4*PI*d/lambda);

The last term is the path loss. 

Electronics Manufacturer Links

The best way to find parts is to use our free Electronics Component Directory, where a myriad of electronics manufactures are listed.

Other Electronics Links

We offer a broad range of electrical engineering calculators and electronics articles and tutorials

 

Daycounter specializes in contract electronics design.  Do you need some help on your project?  Contact us to get a quote. 

 

 

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