Just as the jump from 4G to 5G represents an expansion of spectrums used and introduction of new frequencies, so will the evolution between 5G and 6G communications. Whereas 5G leverages mmWave in the microwave frequency range, 6G will take advantage of even smaller wavelengths at the Terahertz (THz) band, which is typically referred to as 100 GHz to 3 THz.
Just as there have been, and will continue to be, many challenges with 5G, so will there be many new challenges with 6G. One of those challenges will be developing commercial transceivers at the to-be utilized THz frequencies. This is largely an area in which electronics component providers will need to innovate. For example, semiconductor providers will need to deal with extremely small wavelengths and correspondingly small physical size of RF transistors and how they will interwork with element spacing of THz antenna arrays.