Principle and application of ball SAW devices

Kazushi Yamanaka; Noritaka Nakaso; Takeshi Fukiura; Dong Youn Sim

doi:10.1002/eej.20817

Principle and application of ball SAW devices

Kazushi Yamanaka, Noritaka Nakaso, Takeshi Fukiura, Dong Youn Sim

New Industry Creation Hatchery Center (NICHe)

Research output: Contribution to journal › Article › peer-review

Abstract

A thin beam of waves usually diverges due to diffraction, which is a limitation of any device using such waves. However, a surface acoustic wave (SAW) on a sphere with an appropriate aperture does not diverge but is collimated, realizing ultra-multiple roundtrips along an equator of the sphere. This effect is caused by the balance between diffraction and focusing on a spherical surface, and it enables realization of high-performance ball SAW sensors.

Original language	English
Pages (from-to)	41-51
Number of pages	11
Journal	Electrical Engineering in Japan (English translation of Denki Gakkai Ronbunshi)
Volume	168
Issue number	1
DOIs	https://doi.org/10.1002/eej.20817
Publication status	Published - 2009 Jul 15

Keywords

Multiple roundtrips
Naturally collimated beam
Sphere
Surface acoustic wave

ASJC Scopus subject areas

Energy Engineering and Power Technology
Electrical and Electronic Engineering

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author = "Kazushi Yamanaka and Noritaka Nakaso and Takeshi Fukiura and Sim, {Dong Youn}",

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AU - Sim, Dong Youn

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N2 - A thin beam of waves usually diverges due to diffraction, which is a limitation of any device using such waves. However, a surface acoustic wave (SAW) on a sphere with an appropriate aperture does not diverge but is collimated, realizing ultra-multiple roundtrips along an equator of the sphere. This effect is caused by the balance between diffraction and focusing on a spherical surface, and it enables realization of high-performance ball SAW sensors.

AB - A thin beam of waves usually diverges due to diffraction, which is a limitation of any device using such waves. However, a surface acoustic wave (SAW) on a sphere with an appropriate aperture does not diverge but is collimated, realizing ultra-multiple roundtrips along an equator of the sphere. This effect is caused by the balance between diffraction and focusing on a spherical surface, and it enables realization of high-performance ball SAW sensors.

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Principle and application of ball SAW devices

Abstract

Keywords

ASJC Scopus subject areas

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