Mechanical transmission loss of the sole Bragg reflector by GHz pulse echo technique with thick SiO2delay line

Naoki Ishii, Keita Kondo, Motoshi Suzuki, Takahiko Yanagitani

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Extraction of the experimental data of the sole Bragg reflector is complicated compared to the theoretical prediction of mechanical transmission loss of the sole Bragg reflector. This is because the property of a piezoelectric layer on Bragg reflector and that of the sole Bragg reflector is measured simultaneously in the standard impedance measurement. In this study, the method to evaluate the acoustic transmission loss of the sole Bragg reflector by using pulse echo technique with SiO2 delay line is proposed. A Sc0.40Al0.60N piezoelectric transducer whose acoustic conversion loss is 3.2 dB and fractional bandwidth is 56% was employed with two pairs Ta/SiO2 Bragg reflectors as a test sample. As a result, the experimental transmission loss of the sole Bragg reflector less than -20 dB was obtained. Experimentally extracted mechanical transmission loss agrees with the theoretical one.

Original languageEnglish
Title of host publicationIEEE MTT-S International Conference on Microwave Acoustics and Mechanics, IC-MAM 2022
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages82-85
Number of pages4
ISBN (Electronic)9781665468312
DOIs
Publication statusPublished - 2022
Event1st IEEE MTT-S International Conference on Microwave Acoustics and Mechanics, IC-MAM 2022 - Munich, Germany
Duration: 2022 Jul 182022 Jul 20

Publication series

NameIEEE MTT-S International Conference on Microwave Acoustics and Mechanics, IC-MAM 2022

Conference

Conference1st IEEE MTT-S International Conference on Microwave Acoustics and Mechanics, IC-MAM 2022
Country/TerritoryGermany
CityMunich
Period22/7/1822/7/20

Keywords

  • Bragg reflector
  • Pulse echo method
  • SMR

ASJC Scopus subject areas

  • Computational Mechanics
  • Electrical and Electronic Engineering
  • Mechanics of Materials
  • Electronic, Optical and Magnetic Materials
  • Acoustics and Ultrasonics

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