Earl Lum, founder and president of EJL Wireless Research, believes the migration to 4.5G and 5G will create a “period of prosperity” for the compound semiconductor industry, as LDMOS power amplifiers cede share to GaN and GaAs. He forecasts that 5G and fixed wireless access transceivers at 28 GHz will exceed 20 million units by 2021, and 5G new radio (NR) transceiver shipments will represent 80 percent of all macrocell shipments by 2021.