I'm kind of confused about which is the most correct unit when it comes to the measure of wireless signal's strength. It seems that the correct unit is V/m (usually expessed in dBuV/m), however it seems that most of the time W are used (in the form of dBm).
From what I can tell dBm actually expresses the power that arrives at the receiving antenna, which is related to the actual signal strength and it will vary according to an inverse square law.
What has been puzzling me is that I found this article (which I'm unsure wether is correct or not) that states:
The magnitude of the E component of a radio wave varies inversely with the distance from the transmitter in a free-space, line-of-sight link. If the distance is doubled, the E-field intensity is cut in half; if the distance increases by a factor of 10, the E-field intensity becomes 1/10 (0.1 times) as great. The E component of an EM field is measured in a single dimension, so the intensity-versus-distance relation is a straight inverse rule, not the inverse-square law.
Could someone please clarify this statement and shed some light on how dBm and dBuV/m are related?