Research Interests: Ultra-narrow band, low-loss RF filters via mechanical circuit-based approach and new techniques for microfabrication.Job Interests: research in microsystem technologies
Li-Wen Hung received her B.S. and M.S. degrees from National Taiwan University, Taipei, and University of Michigan, Ann Arbor, respectively, both in Electrical Engineering. She is currently a Ph.D. student in Prof. Clark T.-C. Nguyen’s lab focusing on design and fabrication of narrow-band RF micromechanical filters. She has three patent applications and receives multiple awards, including Best Poster Award and two Best Paper Awards from BSAC IAB, and Gold Prize of TSMC Outstanding Student Research Award in 2010.
Micromechanical Transmit Filter [BPN358]
The ever-increasing appetite for wireless interconnectivity is beginning to drive new functions, like frequency gating spectrum analysis, that in turn drive a need for GHz resonators with si-multaneous high Q (>30,000) and low impedance (<200 Ohm). No single on-chip resonator device can deliver such performance in this frequency range to date. To achieve simultaneous high Q and low impedance, either the impedance of capacitive resonators must be lowered, or the Q's of piezoelectric resonators must be raised.
This project investigates methods for increasing quality factor of piezoelectric resonators via capacitive-piezo transducers and Q-boosting circuit, and has demonstrated Q's greater than 10,000 and higher than reported for any other sputtered AlN d31-piezoelectric micromechanical resonator have been demonstrated for the first time.