A 28GHz, Asymmetrical, Modified Doherty Power Amplifier, in 22nm FDSOI CMOS: presented in 2020 IEEE International Symposium on Circuits and Systems (ISCAS) by Nourhan Elsayed
A 28GHz, Modified Doherty Power Amplifier (MDPA) was implemented in 22nm FDSOI CMOS technology from GF. The MDPA adopts an asymmetrical topology utilizing two cascode CMOS amplifiers as the main (Class-A) and auxiliary (Class-C). This allows a supply voltage of 2.5V and consequently higher output power. The use of a main Class-A amplifier is conducive to a higher linearity (IIP3). The integrated design implements the main and auxiliary amplifier, along with the matching and transmission line networks on chip. The fabricated amplifier occupies an area of 1.2mm聽2聽, exhibits 12 dBm saturated output power, a peak power gain of 10dB, 16% peak power-added efficiency (PAE) and 12.5% at 6-dB back-off. The measured IIP3 is 20dBm.
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