Impedance-matched high-overtone bulk acoustic resonator

Article Engineering, Electrical & Electronic

High-Temperature Performance of AlN MESFETs With Epitaxially Grown n-Type AlN Channel Layers

Masanobu Hiroki et al.

Summary: AlN MESFETs with an epitaxially grown n-type AlN channel layer exhibit temperature dependence and demonstrate promising device performance at high temperatures, making them suitable for high-voltage electronic devices.

IEEE ELECTRON DEVICE LETTERS (2022)

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Article Physics, Applied

X-band epi-BAW resonators

Wenwen Zhao et al.

Summary: This study demonstrates the suspended AlN thin-film bulk acoustic resonators (FBARs) at 9.2 GHz in the X-band, showing promising performance and potential for integration with other devices for RF front end and microwave filter applications in quantum computing.

JOURNAL OF APPLIED PHYSICS (2022)

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Article Acoustics

Microwave Acoustic Attenuation in CTGS Single Crystals

Andrei Sotnikov et al.

Summary: This study explores the special material properties of the single crystalline material CTGS and its suitability for microacoustic applications under extreme conditions. The crystal structure's high degree of order and acceptable piezoelectric strength make it a potential candidate for use at high temperatures. Investigation into the crystal's behavior at gigahertz frequencies reveals low-loss dynamic behavior and the predominant Akhiezer loss mechanism.

IEEE TRANSACTIONS ON ULTRASONICS FERROELECTRICS AND FREQUENCY CONTROL (2021)

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Article Physics, Applied

Toward 40GHz excitation of diamond-based HBAR

Boris P. Sorokin et al.

Summary: Researchers have successfully excited longitudinal bulk acoustic waves at frequencies up to 40GHz in a diamond-based High overtone Bulk Acoustic Resonator (HBAR) using an aluminum-scandium nitride film as an effective piezoelectric transducer. They also studied peculiarities of the HBAR's frequency response and acoustic attenuation in diamond.

APPLIED PHYSICS LETTERS (2021)

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Article Acoustics

The Effects of a Coated Material Layer on High-Overtone Bulk Acoustic Resonator and its Possible Applications

Sandeep Sharma Kongbrailatpam et al.

Summary: This article characterizes the effects of an additional polymer layer on a high-overtone bulk acoustic wave resonator based on BSTO thin film, showing significant differences in resonance frequencies, coupling coefficient, and quality factor distribution. The study reveals that the mechanical loss of the added layer has a significant effect on the resonator parameters, and the simulation results agree with experimental findings.

IEEE TRANSACTIONS ON ULTRASONICS FERROELECTRICS AND FREQUENCY CONTROL (2021)

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Article Engineering, Electrical & Electronic

A New Class of High-Overtone Bulk Acoustic Resonators Using Lithium Niobate on Conductive Silicon Carbide

Jinbo Wu et al.

Summary: This study introduces a new class of High-overtone Bulk Acoustic Resonators (HBARs) with only top electrodes but excellent performance, utilizing lithium niobate thin films on conductive silicon carbide. The devices exhibit a wide frequency response range, high f·Q value, and low temperature coefficient of frequency (TCF). Adjustment of the in-plane orientation of the top electrodes can change the frequency response of the resonator. A multi-band filter based on these HBARs shows promising potential for radio-frequency applications.

IEEE ELECTRON DEVICE LETTERS (2021)

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Article Multidisciplinary Sciences