A 60-GHz Outphasing Transmitter in 40-nm CMOS

This paper presents the analysis, design, and implementation of a 60-GHz outphasing transmitter in 40-nm bulk CMOS. The 60-GHz outphasing transmitter is optimized for high output power and peak power-added efficiency (PAE) while maintaining sufficient linearity. The chip occupies an active area of 0.33 mm² and consumes 217 mW from a 1-V supply voltage, delivering 15.6-dBm linear output power with 25% PAE (PA). It achieves a 500-Mb/s 16QAM modulation with 12.5-dBm average output power and 15% average efficiency (PA) at an EVM of -22 dB. Mismatch compensation and phase correction are applied to further improve the average output power and efficiency by about 1.6 dB and 4%, respectively.