Friis Transmission Equation
The fraction of the power delivered to a transmitting antenna that is received by a receiving antenna is proportional to the product of the apertures of both the antennas. This is given by a form of the Friis transmission equation:.
where
- Pr is the power delivered by the receiving antenna in watts
- Pt is the power applied to the transmitting antenna in watts
- Ar is the aperture of the receiving antenna in m2
- At is the aperture of the transmitting antenna in m2
- r is the distance between the antennas in m
- λ is the wavelength of the radio waves in m
Read more about this topic: Antenna Aperture
Famous quotes containing the word equation:
“A nation fights well in proportion to the amount of men and materials it has. And the other equation is that the individual soldier in that army is a more effective soldier the poorer his standard of living has been in the past.”
—Norman Mailer (b. 1923)