GHz Broadband SH0 Mode Lithium Niobate Acoustic Delay Lines

Ruochen Lu, Yansong Yang, Ming Huang Li, Tomas Manzaneque, Songbin Gong

Research output: Contribution to journalArticle

Abstract

We present the first group of GHz broadband SH0 mode acoustic delay lines (ADLs). The implemented ADLs adopt unidirectional transducer designs in a suspended X-cut lithium niobate thin film. The design space of the SH0 mode ADLs at GHz is first theoretically investigated, showing that the large coupling and sufficient spectral clearance to adjacent modes collectively enable the broadband performance of SH0 delay lines. The fabricated devices show 3-dB fractional bandwidth ranging from 4% to 34.3% insertion loss between 3.4 and 11.3 dB. Multiple delay lines have been demonstrated with center frequencies from 0.7 to 1.2 GHz, showing great frequency scalability. The propagation characteristics of SH0 in lithium niobate thin film are experimentally extracted. The demonstrated ADLs can potentially facilitate broadband signal processing applications.

Original languageEnglish (US)
Article number8847643
Pages (from-to)402-412
Number of pages11
JournalIEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control
Volume67
Issue number2
DOIs
StatePublished - Feb 2020

Keywords

  • Acoustic delay lines (ADLs)
  • enhanced mobile broadband (eMBB)
  • lithium niobate
  • microelectromechanical systems
  • piezoelectricity
  • SH0 modes

ASJC Scopus subject areas

  • Instrumentation
  • Acoustics and Ultrasonics
  • Electrical and Electronic Engineering

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