>"The near field and far field are regions of the electromagnetic field (EM) around an object, such as a transmitting antenna, or the result of radiation scatte

>"The near field and far field are regions of the electromagnetic field (EM) around an object, such as a transmitting antenna, or the result of radiation scattering off an object. Non-radiative 'near-field' behaviors dominate close to the antenna or scattering object, while electromagnetic radiation 'far-field' behaviors dominate at greater distances. Far-field E (electric) and B (magnetic) field strength decreases as the distance from the source increases, resulting in an inverse-square law for the radiated power intensity of electromagnetic radiation. By contrast, near-field E and B strength decrease more rapidly with distance: the radiative field decreases by the inverse-distance squared , the reactive field by an inverse cubed law , resulting in a diminished power in the parts of the electric field by an inverse fourth-power and sixth-power , respectively. The rapid drop in power contained in the near-field ensures that effects due to the near-field essentially vanish a few wavelengths away from the radiating part of the antenna." PDS: Boy, it sure seems that antennas and EM fields have all sorts of inverse N power laws governing various properties/attributes/aspects of them. I think that it would be an interesting future project to first enumerate all of the N power properties/attributes, and then see if there are any gaps in that table, for example, what field or fields are produced which decline relative to distance and the inverse fifth power? Or, if there turns out to be none... then how would such a field or fields be created? And how would they be measured? Oh, it might not have any applications! But it would be tremendous for understanding... Anyway, I think there might be a lot of room for research in this area... Not all antennas, fields, power sources, frequency generators, mixers, and field calculaton math, are created equal, let's remember...