Abstract

In this paper, a transformer based 2-stage fully differential power amplifier is proposed for mmWave 5G applications. To improve the linearity of the power amplifier, a 2 <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">nd</sup> harmonic tap and diode linearization bias circuit are added to the gate of each stages, and a cross coupling capacitor is applied to increase the gain. Using 65-nm CMOS technology, the simulated PA achieves maximum gain of 32.1dB, 20.5dBm saturated output power, 17.9% power added efficiency (PAE) at 1dB compression point (OP1dB) of 16.5dBm, at 28GHz

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