Lithium niobate MEMS chirp compressors for near Zero power wake-up radios

Tomás Manzaneque, Ruochen Lu, Yansong Yang, Songbin Gong

Research output: Contribution to journalArticle

Abstract

This paper presents the first demonstration of chirp compressors based on laterally vibrating modes in suspended lithium niobate thin films. Both shear-horizontal and length-extensional modes have been explored and demonstrated with the electromechanical coupling coefficients of 30% and 39%, respectively, in a double-dispersive delay line structure. The high electromechanical coupling, along with the low propagation loss in the suspended thin film, produces a low insertion loss of 10 dB over a large fractional bandwidth of 50%. The best fabricated device demonstrates a delay-bandwidth product of 100, and provides a voltage gain of 5 to the corresponding chirp signals. Moreover, significant signal-to-noise ratio enhancements (>100), collectively enabled by the processing gain and filtering characteristics of the chirp compressors, have been demonstrated. The measured devices, in this paper, greatly outperform state-of-the-art chirp compressors based on surface acoustic waves in insertion loss for a comparable TB. As a result, signal-to-noise ratio enhancement and voltage gain have been simultaneously demonstrated for the first time in a passive device and the analog domain. The high performance can be harnessed to greatly enhance the sensitivity of near zero power wake-up radio receivers and enable low-power wireless connectivity for Internet of Things applications.

Original languageEnglish (US)
Pages (from-to)1204-1215
Number of pages12
JournalJournal of Microelectromechanical Systems
Volume26
Issue number6
DOIs
StatePublished - Dec 2017

Fingerprint

Radio receivers
MEMS
Compressors
Lithium
Electromechanical coupling
Insertion losses
Signal to noise ratio
Bandwidth
Thin films
Electric delay lines
Electric potential
Surface waves
Demonstrations
Acoustic waves
Processing

Keywords

  • Acoustic devices
  • Chirp compressors
  • Delay lines
  • Internet of things
  • Lithium niobate
  • Low power devices
  • Microelectromechanical systems
  • Piezoelectricity
  • Wake-up radios

ASJC Scopus subject areas

  • Mechanical Engineering
  • Electrical and Electronic Engineering

Cite this

Lithium niobate MEMS chirp compressors for near Zero power wake-up radios. / Manzaneque, Tomás; Lu, Ruochen; Yang, Yansong; Gong, Songbin.

In: Journal of Microelectromechanical Systems, Vol. 26, No. 6, 12.2017, p. 1204-1215.

Research output: Contribution to journalArticle

Manzaneque, Tomás ; Lu, Ruochen ; Yang, Yansong ; Gong, Songbin. / Lithium niobate MEMS chirp compressors for near Zero power wake-up radios. In: Journal of Microelectromechanical Systems. 2017 ; Vol. 26, No. 6. pp. 1204-1215.
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