An outdoor municipal point-to-point note cites free space path loss as distance increases with no obstacles between radios. What does free space path loss describe?
Select an answer to reveal the explanation.
Short Explanation
Even in empty air, the wave spreads like a flashlight beam getting dimmer farther from the bulb. That distance dimming is free space path loss. Walls eating energy is a different monster — do not rename every weak link 'FSPL' when you are really staring at concrete.
Full Explanation
Free space path loss (FSPL) is the reduction in power density as an RF wave propagates and spreads with distance in free space, even without solid obstacles. CWTS objectives distinguish that idea from attenuation through materials or atmospheric/medium effects. Security misconfiguration and PoE delivery do not define FSPL. Outdoor unobstructed links are the classic teaching case for distance spreading loss.