The Design and Thermal Reliability Analysis of a High-Efficiency K-Band MMIC Medium-Power Amplifier with Multiharmonic Matching

Table 2

The efficiency comparison of K-band PAs.

Reference	Process/topology	Frequency		PAE	Chip size
[11]	GaAs pHEMT/4 stages	17–26 GHz	24 dBm	15%	4.20 mm × 1.80 mm
[12]	GaAs pHEMT/4 stages	18–35 GHz	23.5 dBm	11%	4.70 mm × 1.90 mm
		35–40 GHz	22 dBm	8%
	GaAs pHEMT/6 stages	17–36 GHz	23 dBm	8%	NA
		36–40 GHz	22.5 dBm	14%
[13]	GaAs pHEMT/2 stages	24–28 GHz	19.8 dBm	19.8%	1.44 mm × 2.45 mm
[14]	GaAs pHEMT/4 stages	17–35 GHz	22 dBm	30%	1.50 mm × 1.00 mm
[15]	GaAs pHEMT/3 stages	20–30 GHz	22 dBm	21%	1.44 mm × 2.45 mm
This work	GaAs pHEMT/4 stages	25–27 GHz	20 dBm	40%	2.20 mm × 1.20 mm