“In July 2016, the FCC-approved spectrum in the microwave bands of 28 GHz, 37 GHz, and 39 GHz. These higher frequency bands are needed to achieve the allowable channel bandwidth required to reach the data rates, which will be 1000x higher than those of today’s 4G LTE speeds.

Today’s energy-efficient building materials can attenuate 4G radio frequency signals anywhere from 2 to 15dB. This is impactful as just 3dB of attenuation is a decrease in power of 50%. Therefore, the strength of a signal inside a car or building could be as little as half, or even only 10%, of the strength of the outside signal. Higher frequency microwave 5G signals will be reduced even further.” – Jeffrey Gudewicz via Network Computing

http://www.networkcomputing.com/wireless-infrastructure/5g-promising-challenging/1278332324