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2024 IEEE Miami Section: Pushing the Boundaries of Computational Electromagnetics – Application to Antenna Designs, Placement, Co-site Interference Simulations and Digital Twins
October 30, 2024 @ 3:00 pm – 4:00 pm
“Load-Modulated Balanced Amplifier (LMBA) forEmerging Wireless Communications“
Wednesday, October 30, 2024 | 3:00 PM EST
Location: EC 3930, 10555 W Flagler St, Miami, FL 33174
Zoom – Meeting ID: 891 9344 0506| Passcode: LLYie3
Dr. Kenle Chen,
Assistant Professor, University of Central Florida,
Associate Editor of IEEE Transactions
Theme of session: Load modulation has been a compelling technology for high-efficiency power amplification of spectrally-efficient modulated signals. However, conventional Doherty power amplifiers (PAs) face limitations including restricted bandwidth, limited dynamic range, and high sensitivity to load impedance mismatch. In this presentation, I will introduce a new family of load-modulation PAs, namely load-modulated balanced amplifier (LMBA). This seminar will also uncover a new theoretical framework and design methodology for LMBA based on signal-flow graph. Together with versatile carrier/peaking biasing schemes, a plethora of different LMBA modes are developed and demonstrated, achieving extended power back-off range, unprecedented efficiency, literally unlimited bandwidth, and intrinsic linearity. Moreover, the quadrature-balanced topology can also enable non-reciprocal isolation and circulation at the antenna interface without relying on magnetic devices, which further inspires multiple new front-end technologies promising for advanced massive MIMO, FDD, and full duplex applications
Dr. Kenle Chen received the Ph.D. degree in Electrical Engineering from Purdue University, West Lafayette, Indiana, USA, in 2013. He is currently an Assistant Professor with the Department of Electrical and Computer Engineering at the University of Central Florida, Orlando, FL. His research interests include ultra-efficient and wideband power amplifiers, AI-assisted RF circuits and systems, and heterogeneous integration of radio system in package. Prior to his career in academia, he worked as Principle/Lead RFIC engineer in industry, where he focused on the development of advanced RF front-ends for various emerging wireless platforms.
Dr. Chen received the NSF CAREER Award in 2023, and his group have won multiple prestigious research-based awards, including First Place Best Paper Award of IEEE MTT-S International Microwave Symposium (IMS) 2020, three Best Paper Awards in IEEE Wireless and Microwave Conference (WAMICON), and four times of First Place Awards in IEEE MTT-S Student Design Competitions from 2018-2021. He has also been serving as Associate Editor of IEEE Transactions on Microwave Theory and Techniques, IEEE MTT-S Adcom Regional Coordinator, TPC Chair and Steering Committee Member of multiple IEEE conferences.