Assistant Professor School of Microelectronics

Dr. Xiaolong Liu received the Ph.D. degree in Electronic and Computer Engineering from the Hong Kong University of Science and Technology, in 2019. He is currently an Assistant Professor with the School of Microelectronics, Southern University of Science and Technology, Shenzhen, China. His research interests include high-performance radio frequency (RF), millimeter-wave (mm-Wave), and sub-terahertz (sub-THz) local oscillators/phase-locked loops (PLLs)/frequency synthesizers, mm-Wave transceivers, and high-speed wireline transmitters in CMOS technologies for the emerging high data rate wireless/wireline communications.

Personal Profile


mm-Wave/THz Wireless Transceivers

High-Performance PLLs/Frequency Synthesizers

RF/mm-Wave/THz LO Generators

High-Speed SerDes

Publications Read More

1. X. Liu and H. C. Luong, “A Fully Integrated 0.27-THz Injection-Locked Frequency Synthesizer with Frequency-Tracking Loop in 65-nm CMOS,” IEEE Journal of Solid-State Circuits (JSSC), vol. 55, no. 4, pp. 1051–1063, April 2020.

2. X. Liu, Y. Chao and H. C. Luong, “A 59-to-276-GHz CMOS Signal Generator Using Varactor-Less VCO and Dual-Mode ILFD,” IEEE Journal of Solid-State Circuits (JSSC), vol. 56, no. 8, pp. 2324–2334, Aug. 2021.

3. X. Liu and H. C. Luong, “A 170-GHz 23.7%-Tuning-Range CMOS Injection-Locked LO Generator with Third-Harmonic Enhancement,” IEEE Transactions on Microwave Theory and Techniques (TMTT), vol. 68, no. 7, pp. 2668–2678, July 2020.

4. D. Xu, Y. Kou, P. Lai, Z. Cheng, T. Cheung, L. Moser, Y. Zhang, X. Liu, M. Lam, H. Jia, Q. Pan, W. Szeto, C. Tang, K. Mak, K. Sarfraz, T. Zhu, M. Kwan, E. Au, C. Conroy, K. Chan, “A Scalable Adaptive ADC/DSP-Based 1.25-to-56Gbps/112Gbps High-Speed Transceiver Architecture Using Decision-Directed MMSE CDR in 16nm and 7nm,” IEEE International Solid-State Circuits Conference (ISSCC), San Francisco, CA, USA, pp. 134–136, Feb. 2021.

5. X. Liu and H. C. Luong, “A Fully-Integrated 270-GHz Frequency Synthesizer in 65nm CMOS,” IEEE VLSI Circuit Symposium (VLSI), Kyoto, Japan, pp. C40–C41, June 2019. (Technical highlights)

6. X. Liu, Z. Huang, J. Yin and H. C. Luong, “Magnetic-Tuning Millimeter-Wave CMOS Oscillators,” IEEE Custom Integrated Circuits Conference (CICC), Austin, TX, USA, pp. 1–8, April 2019. (Invited paper)

7. X. Liu and H. C. Luong, “A 0.3-V 2.5-mW 154-to-195GHz CMOS Injection-Locked LO Generation with -186.5dB FoM,” IEEE Radio-Frequency Integrated Circuits (RFIC), Philadelphia, PA, USA, pp. 196–199, June 2018.

8. X. Liu, Y. Chao and H. C. Luong, “A 59-to-276 GHz CMOS Signal Generation for Rotational Spectroscopy,” IEEE Radio-Frequency Integrated Circuits (RFIC), Honolulu, HI, USA, pp. 92–96, June 2017.

9. X. Liu, C. Chen, J. Ren and H. C. Luong, “Transformer-Based Varactor-Less 96GHz–110GHz VCO and 89GHz–101GHz QVCO in 65nm CMOS,” IEEE Asian Solid-State Circuits Conference (A-SSCC), Toyama, Japan, pp.357–360, Nov. 2016.

10. X. Liu and H. C. Luong, “A 103.1 GHz Varactor-Less VCO with 14.3% Tuning Range in 65nm CMOS” IEEE International Solid-State Circuit Conference (ISSCC) Student Research Preview, San Francisco, CA, USA, Feb. 2016.

Lab members Read More

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We welcome individuals passionate in research to join our research group. We have openings for Research Assistant Professor, Postdoctoral Fellows, Research Assistants, Graduate Students, as well as Internships. Interested individuals are invited to email a copy of his/her CV to our email address.

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