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A Compact I/Q Upconversion Chain for a 5G Wireless Transmitter in 65-nm CMOS Technology
IEEE Microwave and Wireless Components Letters ( IF 2.374 ) Pub Date : 2020-02-18 , DOI: 10.1109/lmwc.2020.2971100
Hyohyun Nam; Woojae Lee; Juho Son; Jung-Dong Park

A compact in-phase/quadrature (I/Q) upconversion chain with high linearity is presented for an integrated transceiver for 5G mobile communications. The upconverter includes 10–11.5-GHz upconversion chains, a quadrature signal generator (QSG) consisting of the two coupled current-mode logic latches, and inverting amplifiers to provide the rail-to-rail local oscillator (LO) swing with a 25% duty cycle for I/Q mixers which achieved 46.9 dB of image rejection ratio. A cross-coupled pair operating at weak inversion was used at the output of the upconverter and it improved the output of the third-order intercept point (OIP3) by 2.58 dB. The upconverter achieved a transmitter gain of 9.12 dB and an OIP3 of 14.45 dBm. The implemented I/Q upconverter with the QSG consumes 48.7 mW under a 1-V supply, and it occupies only 0.57 mm 2 of chip area including pads.
更新日期:2020-03-16

 

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