학술논문

Acoustic Resonance Spectroscopy with an Uncalibrated Microwave Path.
Document Type
Article
Source
Acoustical Physics. Feb2023, Vol. 69 Issue 1, p40-47. 8p.
Subject
*ACOUSTIC resonance
*YTTRIUM aluminum garnet
*MICROWAVE spectroscopy
*GARNET
*TRANSPARENT ceramics
*OPTICAL materials
*ACOUSTIC resonators
*ACOUSTIC emission
Language
ISSN
1063-7710
Abstract
Acoustic resonance spectroscopy (ARS) is an informative analytical method that yields information about thicknesses and acoustic properties of layers in a multilayer structure representing a high-overtone bulk acoustic wave resonator (HBAR). Since the HBAR spectrum has many resonance features, the development of automatic methods for its processing is an urgent task. In this study, a method for extracting ARS data from a signal distorted by a RF measuring path without additional measurements of reference impedances (calibration) is proposed, which brings the spectrum to a form convenient for automatic processing and significantly expands the range of the ARS application. The method is especially relevant for processing HBAR spectra with a low excitation efficiency. As an example of such processing, the central frequencies and effective widths of more than a thousand resonant peaks are determined and, based on this, the frequency dependence of the acoustic attenuation is established for a new material: optical ceramics based on doped yttrium aluminum garnet nanoparticles. [ABSTRACT FROM AUTHOR]