Abstract: Piezoelectric acoustic devices are irreplaceable in mobile wireless communications given their fundamental advantages cannot be fully delivered by any other technologies. Their performance directly determines the communication mode, signal strength, data rate, and other critical performance of mobile devices. As modern communication standards evolve toward higher frequencies and wider bandwidth for higher data rate applications, a new class of piezoelectric acoustic devices covering an unprecedented wide frequency range with more efficient transduction is sought after. This talk will introduce a series of advanced piezoelectric acoustic platforms based on Lithium niobate thin films which can be either solidly mounted on carrier substrates or suspended to cover frequency bands from GHz to mmWave.

Bio: Yansong YANG is currently an Assistant Professor in the Department of Electrical and Computer Engineering at The Hong Kong University of Science and Technology. He received M.S. and Ph.D. degrees in electrical engineering from the University of Illinois at Urbana-Champaign, in 2017 and 2019, respectively. He has won the 2nd Place in Best Paper Competition at the 2018 IEEE International Microwave Symposium, and the best paper award at 2019 IEEE International Ultrasonics Symposium. He was also a finalist for the Best Paper Award at 2018 IEEE International Frequency Control Symposium and the Advanced Practices Paper Competition Award at 2020 IEEE International Microwave Symposium. He is also a recipient of the 2019 P. D. Coleman Graduate Research Award from UIUC, and the 2022 Microwave Prize from the IEEE Microwave Theory and Techniques Society (MTT-S). He is the author and co-author of more than 80 papers in journals and international conferences with a citation h-index of 23. He currently serves as the chair of the IEEE Hong Kong Electron Device/Solid-State Circuits Joint Chapter.