Principle and application of ball SAW devices

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

doi:10.1541/ieejeiss.127.1177

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 wave 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 ultramultiple 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)	1177-1185+7
Journal	IEEJ Transactions on Electronics, Information and Systems
Volume	127
Issue number	8
DOIs	https://doi.org/10.1541/ieejeiss.127.1177
Publication status	Published - 2007

Keywords

Multiple roundtrips
Naturally collimated beam
Sphere
Surface acoustic wave

ASJC Scopus subject areas

Electrical and Electronic Engineering

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10.1541/ieejeiss.127.1177

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AU - Nakaso, Noritaka

AU - Fukiura, Takeshi

AU - Sim, Dong Youn

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N2 - A thin beam of wave 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 ultramultiple 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 wave 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 ultramultiple 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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