Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 7 of 7 for “"kt2"”.
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REALIZATION OF TEMPERATURE COMPENSATED ALUMINUM NITRIDE MICRORESONATOR FILTERS WITH BANDWIDTHS BEYOND kt2 LIMIT
… the microresonator coupling coefficient, kt2, limit of 0.3%. A method is presented that offers the flexibility of using low Q reactive components to couple temperature compensated aluminum nitride microresonators with bandwidths ranging from extremely narrow (0.05%), as limited by the Q of …
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Lithium niobate RF-MEMS oscillators for IoT, 5G and beyond
… factor (Q), high electromechanical coupling (kt2), and high figure-of-merit (FoMRES= Q kt2) are crucial for building the envisioned high-performance oscillators. Those oscillators can be enabled with lower power consumption, wider tuning ranges, and a higher frequency of oscillation when …
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ALN/ALSCN Acoustic Resonant Systems Based on Ultra-Thin Piezoelectric Films
… performance metric of an acoustic resonator, Q×kt2 Figure of merit (FoM), is discussed with robust structures that overcome thin-film fabrication challenges. We propose resonator/filter design in future directions to fulfill the requirements for the compact radio frequency front-end (RFFE) …
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A kinetic study of the hydrolysis of some derivatives of brilliant green
… + Ki BG + h20 BGOH2 K- I BG + - K2 + ON BGOH - kT2 + where BG represents the dye cation. The Harwnett equation has been shown to apply to the rates of hydrolysis of the various meta- and para- substituted dyes and a value for the reaction constant, p, has been obtained. The thermodynamic …
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Super-high-frequency lithium niobate microelectromechanical system resonators
… demonstrated a high electromechanical coupling (kt2) of 29% and a high quality factor (Q) of 527 simultaneously. Hence, this work marks the first time that MEMS resonators at SHF were demonstrated with an extremely high figure of merit (FoM= kt2Q) of 153. The SHF operation and high FoM of these …
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Analysis and modeling of piezoelectric resonant body transistors
… high electromechanical coupling coefficients (kT2 ~ 4%) resulting in a much lower insertion loss, larger power handling defined by the breakdown voltage across piezoelectric films and ease of packing and integration into transceiver circuitry. Transistor sensing has been employed in both …
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Advancing acoustic filters for 5G front-ends: Lithium niobate piezoelectric MEMS resonators and filters
… demonstrated an electromechanical coupling (kt2) of 30%, which is more than three times of current commercial solutions. The fabricated devices based on Y-cut LiNbO3 demonstrated a figure-of-merit (FoM) of 435, which is the highest in acoustic resonators over 1 GHz. The 5G mid-band devices …