The emerging 5G wireless communication systems target operation in multi-band carrier aggregation schemes to fulfill the ever-growing need for higher data rates and communication capacity. To realize multi-band wireless systems there is an urgent need for high-Q resonator technologies with lithographical frequency definition. These resonators enable single-chip integration of radio frequency front-end filters and frequency references needed for configurable data communication over a wide frequency spectrum.
At Tabrizian lab, we follow realization of a purely analytical resonator design methodology, based on dispersion characteristics of Lamb waves in anisotropic single-crystal substrates, to enable systematic design of high-Q resonators with arbitrary cross-sectional mode shapes and frequencies. This project includes analytical / numerical extraction of Lamb wave dispersion relation in rectangular waveguides implemented in anisotropic single-crystal waveguides, and identification of dispersive propagating and evanescent waves to facilitate designing high Q and kt2 resonator through efficient energy localization.