Robert received his BSEE from the University of Washington in 2009. He has previously held industrial positions with Kimberly-Clark working at a tissue factory in Everett, WA and at a Huggies diapers plant in Ogden, UT.
Strong I/O Coupled High-Q Micromechanical Filters [BPN682]
This project applies some of the Q-factor improvement techniques currently used on capacitive resonators to realize better piezoelectric ones, thus enabling new narrowband filter and oscillator applications. Capacitive-piezo transduction provides a clear path for demonstrating low motional impedance (10-1000 Ohm) and high-Q (Q~10,000) AlN resonators at VHF and UHF frequencies, which notably possess much stronger coupling than capacitive resonators. Greatly improved Q-factors, afforded through capacitive-piezoelectric transduction, enable such AlN resonators to achieve higher kt^2-Q figures of merit than traditional AlN resonator counterparts having contacting electrodes. While resonator optimization is a necessary step that this project takes, the long range goal of this effort is to mechanically couple many such resonators to realize high-order, self-switchable, AlN, channel-select filters with fractional bandwidths of 0.1-0.3%, insertion losses of less than 2- dB, stop-band rejection exceeding 50-dB, and handling capability for high out-of-band and in-band power. Such work is nearing fruition.