Free Space Path Loss Calculator

Free space path loss calculator free space path loss is used the calculate the attenuation reduction of signal strength between two antennas.

Free space path loss calculator. The gain of the antennas offsets the loss by a certain decibel value. The inverse function of free space path loss is used in the friis transmission equation. Free space path loss calculator calculate the loss for a given distance at an rf frequency enter distance in km and frequency in either mhz or ghz.

Areas with the same power density therefore form spheres a 4πr around the radiator. Calculation of free space path loss if high frequency energy is emitted by an isotropic radiator than the energy propagate uniformly in all directions. The calculator below is a path loss calculator because it includes the antenna gains.

Free space path loss calculator the free space path loss is the loss in signal strength of a signal as it travels through free space. The free space path loss calculator takes into account the gain on both the receiving and transmitting antennas. Free space path loss assumes the space between the two antennas is an obstruction free line of sight straight path through the air.

This value is usually calculated by discounting any obstacles or reflections that might occur in its path. Also the distance can be calculated if the path loss is given in db. Free space path loss fspl calculations are often used to help predict rf signal strength in an antenna system.

If you ignore the gain at either end i e the transmitting and receiving end then the fspl would just be a factor of the frequency and distance. Substract the field attenuation from the tx power in dbm to get the power in dbm at the rx input. Free space path loss is often given in decibels so this calculator calculates the decibel value of fspl as well.

All of our calculators allow si prefix input. Free space path loss formula following free space path loss formula is used in this calculator to calculate path loss from distance and carrier frequency. Rf link budget calculator refer rf budget calculator with image and equations mentioned below.