Acoustic dispersion in a ball-shaped surface acoustic wave device

Kazushi Yamanaka, Kanwar Jit Singh, Naoya Iwata, Takuji Abe, Shingo Akao, Yusuke Tsukahara, Noritaka Nakaso

Research output: Contribution to journalArticlepeer-review

11 Citations (Scopus)


Theoretical model for ball surface acoustic wave (SAW) sensors has been developed. Wave front distortion encountered in planar SAW sensors caused by diffraction or reflection can be neglected because of the diffraction-free propagation of a naturally collimated beam. Wave form at each turn is expressed by an integral of terms defined by the array factor and the elementary charge density of electrodes as well as the frequency-dependent velocity and attenuation caused by the sensitive film. Irrespective of the significant simplicity of the theory, excellent agreement has been observed between the simulated and experimental wave forms of a double-electrode ball SAW sensor.

Original languageEnglish
Article number214105
JournalApplied Physics Letters
Issue number21
Publication statusPublished - 2007

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)


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