A 60-GHz CMOS direct-conversion transmitter with injection-locking I/Q calibration

This paper proposes a 60-GHz direct-conversion transmitter using an injection-locking I/Q calibration. The 65-nm CMOS transmitter consists of a 5-stage PA, differential VGAs, up-conversion Gilbert-cell mixers, 60GHz quadrature injection-locked oscillators, baseband amplifiers, and 20GHz PLL. The measured sideband rejection ratio is 56 dB by using the proposed calibration technique. The transmitter consumes 240mW from a 1.2-V supply, and can transmit 7 Gb/s in 16QAM.

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