A periodically poled bi-layer lithium niobate resonator excites a second-order thickness mode at 19.23 MHz with Q=3187 and k2=29%, claiming the highest f*Q among piezoelectric power resonators.
A manufacturable AlScN periodically polarized piezoelectric film bulk acoustic wave resonator (AlScN P3F BAW) operating in overtone mode at X and Ku band,
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Periodically Poled Piezoelectric Lithium Niobate Resonator for Piezoelectric Power Conversion
A periodically poled bi-layer lithium niobate resonator excites a second-order thickness mode at 19.23 MHz with Q=3187 and k2=29%, claiming the highest f*Q among piezoelectric power resonators.