13.6 A 42Gb/s 60GHz CMOS transceiver for IEEE 802.11ay.

It is predicted that the required wireless communication capacity will become 1000 times higher every 10 years. Many wireless standards are under discussion to satisfy the unprecedented capacity requirement. For example, the IEEE802.11ay standard is targeting over 100Gb/s data-rate by using the 60GHz band. Unfortunately, the channel bandwidth of 2.16GHz for the 60GHz band is not wide enough to realize such a high data-rate, so a channel-bonding capability is strongly demanded to extend the data-rate as well as 64-QAM support, achieving 42.24Gb/s. To realize 4-channel bonding operation with 64QAM, fine and wideband I/Q mismatch calibration is one of the remaining issues. In addition, an 8b 14.08GS/s ADC is required to support 42.24Gb/s, which is usually realized by a massive time-interleaved ADC, and needs unreasonably large power consumption. In this work, a frequency-interleaved (FI) architecture is employed for the 60GHz transceiver-side to mitigate the wideband I/Q mismatch issue and the ADC requirement. In addition, an asymmetric quadrature injection-locked oscillator (QILO) is proposed to widen the locking range.