S0-Mode Lithium Niobate Acoustic Delay Lines with 1 dB Insertion Loss

Ruochen Lu, Tomas Manzameque, Yansong Yang, Songbin Gong

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

Abstract

This paper demonstrates low-loss acoustic delay lines based on the fundamental symmetrical (S0)mode in lithium niobate thin films for the first time. The demonstrated devices harness the high electromechanical coupling, low loss, and fast phase velocity of the symmetrical mode in the X-cut lithium niobate to achieve an insertion loss as low as 1 dB at 300 MHz. The designs adopt single-phase unidirectional transducers to achieve low insertion loss and flat group delay responses simultaneously. Devices with different key parameters are implemented with fractional bandwidths ranging from 4.1% to 12.8% and delays ranging from 32 ns to 195 ns. With the demonstrated low loss and wide bandwidths, these devices can unlock new possibilites for low-power RF signal processing in the acoustic domain.

Original languageEnglish (US)
Title of host publication2018 IEEE International Ultrasonics Symposium, IUS 2018
PublisherIEEE Computer Society
ISBN (Electronic)9781538634257
DOIs
StatePublished - Dec 17 2018
Event2018 IEEE International Ultrasonics Symposium, IUS 2018 - Kobe, Japan
Duration: Oct 22 2018Oct 25 2018

Publication series

NameIEEE International Ultrasonics Symposium, IUS
Volume2018-October
ISSN (Print)1948-5719
ISSN (Electronic)1948-5727

Other

Other2018 IEEE International Ultrasonics Symposium, IUS 2018
CountryJapan
CityKobe
Period10/22/1810/25/18

Keywords

  • Acoustic devices
  • delay lines
  • lithium niobate
  • microelectromechanical systems
  • piezoelectricity

ASJC Scopus subject areas

  • Acoustics and Ultrasonics

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