The Free-space path loss (FSPL) is the mesaurment in Decibel (Db) of the signal attenuation between two far points, as far is the travel, bigger is the FSPL; for less than 0dB it express a gain relative to 1mW. For RF signals the Db is relative to 1mW know as dBm, it is possible to compute in Decibel Power using as reference value of 0.001 (1mW).
Insert the transmitted power "Gain TX", the received power amplification (Gain RX), the desired frequency and distance to compute the FSPL, and the impedance of receiver to compute the RMS Volt expected to be recive.
| d | Distance in meters |
| f | Frequency in hertz |
| c | Speed of ligth in meters/s |
| Gain TX | |
| Gain RX | |
| Frequency | |
| Distance | |
| Impedance | |
| Speed of light | |
| Wavelength | |
| FSPL | |
| Power TX | |
| Power RX | |
| Power RX | |
| RMS RX | |
| Vpp RX | |
References:
Wikipedia Free-space path loss ---| INDEX |---