# Friis received-power estimate
# Scope: Far-field matched-polarization ideal received power; gains are linear.
# Status: illustrative worked example; engineering review pending.
# Inputs are example values. Checks are editable example requirements, not standards.

transmitPower = 0.1 W
transmitGain = 1.6
receiveGain = 1.6
wavelength = 0.125 m
distance = 100 m

received := transmitPower*transmitGain*receiveGain*(wavelength/(4*pi*distance))^2 [W]

check received power target: received >= 0.000000001 W

scenario alternative: transmitPower = 0.08 W