A Review of 5G Power Amplifier Design at cm-Wave and mm-Wave Frequencies

Table 1

Projected 5G small cells RF requirements for cm-Wave/mm-Wave frequencies (estimated).

Cell Type	RF (dBm)	Number of Users	RF Per; PA (dBm)	Potential PA; Technologies
Femtocell	0–24	1 to 20	<20	CMOS/SOI, SiGe, GaAs
Picocell	24–30	20 to 100	<20	CMOS/SOI, SiGe, GaAs
Microcell	30–40	100 to 1000	<27	GaAs, GaN, CMOS/SOI, SiGe
Macrocell	40–47	1000+	>27	GaN, GaAs