TY - JOUR
T1 - Principle and application of ball SAW devices
AU - Yamanaka, Kazushi
AU - Nakaso, Noritaka
AU - Fukiura, Takeshi
AU - Sim, Dong Youn
N1 - Copyright:
Copyright 2020 Elsevier B.V., All rights reserved.
PY - 2007
Y1 - 2007
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.
KW - Multiple roundtrips
KW - Naturally collimated beam
KW - Sphere
KW - Surface acoustic wave
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U2 - 10.1541/ieejeiss.127.1177
DO - 10.1541/ieejeiss.127.1177
M3 - Article
AN - SCOPUS:34548211797
VL - 127
SP - 1177-1185+7
JO - IEEJ Transactions on Electronics, Information and Systems
JF - IEEJ Transactions on Electronics, Information and Systems
SN - 0385-4221
IS - 8
ER -