I understand there is concern over the limited amount of wireless spectrum available for allocation but am somewhat confused as to why. Couldn't we just divide the electromagnetic spectrum into as many radio frequency bands as we need by making the communication frequency more precise, i.e. broadcasting over 101.713 MHz instead of 101.7 MHz in order to make more room. What are the limiting factors preventing us from doing this?
Signals don't exist at a single frequency. They have a bandwidth that spreads across spectrum. The radio station at 101.7MHz takes up the spectrum from 101.6-101.8MHz.