Cumulative electromagnetic radiation from multiple UWB transmitters

Calculations concerning the total electromagnetic radiation from multiple transmitters are described. Of particular interest is the power incident upon various avionics receivers in an aircraft flying low over an urban environment. Taking into account the shielding effectiveness (SE) of the floors and ceilings in office buildings, it will be shown that thousands, if not tens of thousands, of emitters can operate before reaching the sensitivity levels of these avionics.