2019, Ph.D., The Hong Kong University of Science and Technology
2014, Master, Tsinghua University
2010, Bachelor, Beijing University of Aeronautics and Astronautics

Sep. 2021 to Current, Assistant Professor, Southern University of Science and Technology, China
Sep. 2019 to Aug. 2021, Staff Engineer, eTopus Technology Inc., San Jose, CA, USA
Mar. 2019 to Aug. 2019, Postdoctoral Fellow, The Hong Kong University of Science and Technology, China

RF/mm-Wave/THz Wireless Transceivers
High-Speed SerDes
High-Performance PLLs/Frequency Synthesizers
RF/mm-Wave/THz LO Generators

IEEE VLSI Paper Technical Highlights, 2019
IEEE CICC Invited Talk, 2019

1. 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.
2. 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.
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. X. Liu and H. C. Luong, “Injection-Locking Techniques for CMOS Millimeter-Wave and Terahertz Signal Generation”, IEEE Transactions on Circuits and Systems II (TCAS-II), vol. 69, no. 7, pp. 3037-3043, July 2022. (Invited paper)
5. X. Liu and H. C. Luong, “Analysis and Design of Magnetically Tuned W-Band Oscillators,” IEEE Transactions on Very Large Scale Integration (VLSI) Systems (TVLSI), vol. 30, no. 6, pp. 732–743, June 2022.
6. X. Liu and H. C. Luong, “A 157.8-166.3GHz Fundamental Oscillator Achieving -181.9dBc/Hz FoM in 65nm CMOS,” IEEE Transactions on Terahertz Science and Technology (TTST), vol. 13, no. 1, pp. 93-97, Jan. 2023.
7. S. Tian, X. Liu, “A 18.5-to-22.4GHz Class-F23 VCO Achieving 189.1dBc/Hz FoM Without 2nd/3rd-Harmonic Tuning in 65nm CMOS,” IEEE European Conference on Solid-State Circuits (ESSCIRC), Lisbon, Portugal, pp. 1–4, Sep. 2023.
8. D. Xu, et al. , “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.
9. 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)
10. 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)
11. 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.
12. 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.