5 GHz Acoustic Delay Lines using Antisymmetric Mode in Lithium Niobate Thin Film

Ruochen Lu, Yansong Yang, Michael Breen, Ming Huang Li, Songbin Gong

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

Abstract

This paper demonstrates the first group of acoustic delay lines (ADLs) at 5 GHz, using the first-order antisymmetric (A1) mode in Z-cut lithium niobate thin films. Thanks to the fast phase velocity, large coupling coefficient, and low-loss of A1 waves, the implemented ADLs significantly surpass the operation frequency of precious works with similar feature sizes. The impact of the key design parameters on the device performance is first discussed. The implemented ADLs at 5 GHz show a minimum insertion loss of 7.9 dB, and delays ranging between 15 ns and 109 ns over a fractional bandwidth around 4%. The propagation characteristics of A1 mode acoustic waves have also been extracted for the first time. The A1 ADLs can potentially enable wideband high-frequency passive signal processing functions for future 5G applications in the sub-6 GHz spectrum bands.

Original languageEnglish (US)
Title of host publication2019 IEEE International Ultrasonics Symposium, IUS 2019
PublisherIEEE Computer Society
Pages265-268
Number of pages4
ISBN (Electronic)9781728145969
DOIs
StatePublished - Oct 2019
Event2019 IEEE International Ultrasonics Symposium, IUS 2019 - Glasgow, United Kingdom
Duration: Oct 6 2019Oct 9 2019

Publication series

NameIEEE International Ultrasonics Symposium, IUS
Volume2019-October
ISSN (Print)1948-5719
ISSN (Electronic)1948-5727

Conference

Conference2019 IEEE International Ultrasonics Symposium, IUS 2019
CountryUnited Kingdom
CityGlasgow
Period10/6/1910/9/19

Keywords

  • A1 mode
  • Acoustic delay line
  • lithium niobate
  • microelectro-mechanical systems
  • piezoelectricity

ASJC Scopus subject areas

  • Acoustics and Ultrasonics

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