eprintid: 1624
rev_number: 7
eprint_status: archive
userid: 21
dir: disk0/00/00/16/24
datestamp: 2016-05-29 10:42:41
lastmod: 2016-05-29 10:42:42
status_changed: 2016-05-29 10:42:41
type: article
metadata_visibility: show
creators_name: Bui, Thu Hang
creators_name: Bui, Duc Tung
creators_name: Chu, Duc Trinh
creators_id: trinhcd@vnu.edu.vn
title: An optimization of IDTs for surface acoustic wave sensor
ispublished: pub
subjects: ECE
subjects: ElectronicsandComputerEngineering
divisions: fac_fet
abstract: Acoustic wave devices have been applied for detecting chemical and physical phenomena in gas and liquid applications. For the surface acoustic wave sensors (SAW sensors), the mechanical waves propagating through a piezoelectric crystal include Rayleigh and shear modes. They are influenced by the shape and size of the metal electrodes interdigital transducers (IDTs). Traditionally, IDTs were fabricated in the form of long straight parallel fingers on the piezoelectric substrate. This paper presents a piezoelectric device with focused IDTs (FIDTs) placed on a Y–Z lithium niobate (LiNbO3) substrate to achieve Rayleigh wave energy convergence. The energy conservation principle, called the Rayleigh principle, is used to prove the effective performance of IDTs with concentric shape. Amplitude fields of the conventional and concentric structures are shown. In addition, the energy loss and the output signal changes are compared between the two cases.
date: 2015
date_type: published
publisher: InderScience
full_text_status: none
publication: International Journal Nanotechnology
refereed: TRUE
issn: 1741-8151
citation:   Bui, Thu Hang and Bui, Duc Tung and Chu, Duc Trinh  (2015) An optimization of IDTs for surface acoustic wave sensor.  International Journal Nanotechnology .    ISSN 1741-8151