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- Title
Principle and application of ball SAW devices.
- Authors
Yamanaka, Kazushi; Nakaso, Noritaka; Fukiura, Takeshi; Youn Sim, Dong
- 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. © 2009 Wiley Periodicals, Inc. Electr Eng Jpn, 168(1): 41–51, 2009; Published online in Wiley InterScience (<URL>www.interscience.wiley.com</URL>). DOI 10.1002/eej.20817
- Subjects
ACOUSTIC surface wave devices; OPTICAL diffraction; COLLIMATORS; TRANSISTORS; HYDROGEN analysis
- Publication
Electrical Engineering in Japan, 2009, Vol 168, Issue 1, p41
- ISSN
0424-7760
- Publication type
Article
- DOI
10.1002/eej.20817