CA DREAMS - Technical Seminar Series

Speaker: Hamidreza Aghasi, Professor, UC Irvine

Talk Title: CMOS Circuits and Systems for Coherent Multi-Band Millimeter-Wave Radars

Series: CA DREAMS - Technical Seminar Series

Abstract: This presentation discusses recent advancements in CMOS-based circuit and system design for coherent multi-band millimeter-wave (mm-wave) FMCW radars, enabling enhanced range and angular resolution across multiple frequency bands. We begin by presenting block-level strategies for achieving broadband radiation coverage and phase noise reduction in mm-wave radar systems. Next, we introduce a 49–63 GHz dual-PLL stepped-chirp radar transceiver in 22 nm FD-SOI, which employs phase-locked sub-chirps to achieve a 14 GHz effective bandwidth and 1.4 cm range resolution, while addressing challenges related to chirp linearity and phase/frequency synchronization. We then present a dual-band 23–27 GHz and 69–81 GHz MIMO radar in 65 nm CMOS featuring synchronized LO generation and frequency tripling, enabling a 16 GHz total bandwidth and sub-centimeter range resolution. The presentation concludes with recent measurement results and highlights from ongoing designs targeting further improvements in range and angular resolution for next-generation mm-wave radar systems.

Biography: Hamidreza Aghasi received his B.Sc. in Electrical Engineering from Sharif University of Technology, Tehran, Iran, in 2011, and his M.S. and Ph.D. in Electrical Engineering from Cornell University in 2015 and 2017, respectively. In the summer of 2014, he was an intern at Samsung Research America’s Display Lab in San Jose, California. From 2017 to 2018, he was a postdoctoral research fellow at the University of Michigan, and from 2018 to 2019, he was a mm-Wave research scientist at Acacia Communications Inc. in Holmdel, New Jersey. He is currently an Assistant Professor in the Electrical Engineering and Computer Science Department at the University of California, Irvine (UC Irvine), where he is Director of the High-Speed Integrated Electronics (HIE) Laboratory. His research interests include RF, mm-wave, and terahertz circuit design for imaging, sensing, and communication applications. Dr. Aghasi is a senior member of IEEE, member of Solid-State Circuits Society (SSCS) and the Microwave Theory and Techniques Society (MTT-S), a TPC member of the IEEE Custom Integrated Circuit Conference (CICC) and the IEEE Radio Frequency Integrated Circuits Symposium (RFIC), and an associate editor of IEEE Transactions on Very Large Scale Integration (TVLSI). He also serves as the IEEE MTT-S/EDS Chapter Chair of Orange County, CA. He has reviewed for the IEEE Journal of Solid-State Circuits, IEEE Open Journal of Solid-State Circuits, IEEE Solid-State Circuits Letters, IEEE Transactions on Microwave Theory and Techniques, IEEE Transactions on Very Large Scale Integration (VLSI) Systems, IEEE Electron Device Letters, IEEE Transactions on Circuits and Systems, and IEEE Microwave and Wireless Components Letters. He received the Cornell Graduate Fellowship in 2011, the Jacobs Fellowship in 2012, the Cornell ECE Innovation Award in 2013, the Cornell Scale-up and Prototyping Award in 2017, Best Invited Paper Award at the 2019 IEEE CICC, the NeurIPS ML4PS Reproducibility Award in 2024, and the NSF CAREER Award in 2025.

Host: Dr. Steve Crago

More Info: https://www.isi.edu/events/5737/cmos-circuits-and-systems-for-coherent-multi-band-millimeter-wave-radars/

Webcast: https://usc.zoom.us/j/97017422125?pwd=Dbrt8MNMrmBV3xalKQJcAiNsggFJjJ.1&from=addon

WebCast Link: https://usc.zoom.us/j/97017422125?pwd=Dbrt8MNMrmBV3xalKQJcAiNsggFJjJ.1&from=addon

Audiences: Everyone Is Invited

Contact: Amy Kasmir

Event Link: https://www.isi.edu/events/5737/cmos-circuits-and-systems-for-coherent-multi-band-millimeter-wave-radars/

This event is open to all eligible individuals. USC Viterbi operates all of its activities consistent with the University's Notice of Non-Discrimination. Eligibility is not determined based on race, sex, ethnicity, sexual orientation, or any other prohibited factor.

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