title: SAW focusing by circular-arc interdigital transducers on YZ-LiNbO(3).
abstract: Using the angular spectrum theory and experimental velocity data of surface acoustic waves (SAW) on YZ-LiNbO(3), the focusing characteristics of a circular-arc interdigital transducer have been demonstrated. The calculated results show that the depth of focus is long and the compressed acoustic beam width is very narrow. The concept of a caustic is shown to be an excellent way of characterizing SAW focusing by a circular-arc interdigital transducer on YZ-LiNbO(3). Comparison between theoretical and experimental results shows good agreement.
authors.affiliation: Dept. of Inf. Phys., Nanjing Univ.
authors.forename: S R
authors.initials: SR
authors.lastname: Fang
authors.forename: S Y
authors.initials: SY
authors.lastname: Zhang
authors.forename: Z F
authors.initials: ZF
authors.lastname: Lu