1968/10/01 by James J. Campbell, J.J. Campbell, William Jones +1 · 704 citations
Engineering · Mathematics · #Acoustic Wave Resonator Technologies #Acoustics #Advanced MEMS and NEMS Technologies #Computer science #Crystal (programming language) #Displacement (psychology) #Excitation #Geometry #Lithium niobate #Materials science #Mathematics #Optics #Orientation (vector space) #Physics #Piezoelectricity #Surface (topology) #Surface wave #Ultrasonics and Acoustic Wave Propagation #Wave propagation
paper · doi:10.1109/t-su.1968.29477
published in IEEE Transactions on Sonics and Ultrasonics 15(4), 209-217 (Institute of Electrical and Electronics Engineers)
crossref issued 1968/10/01 · crossref published 1968/10/01 · crossref published-print 1968/10/01 · openalex publication_date 1968/10/01 · crossref created 2011/06/07 · crossref deposited 2022/01/12 · openalex created_date 2025/10/10 · crossref indexed 2026/08/01 · openalex updated_date 2026/08/01
A criterion for judging the relative effeciency of excitation of piezoelectric surface waves as a function of crystal plate orientation and propagation direction is developed. This criterion is based on a velocity change upon application of a thin conducting sheet to the surface. Plots of surface wave velocity for various orientations of the crystal surface are presented as a function of propagation direction for the conducting sheet in contact with and infinitely far removed from the crystal surface. A plot of a typical velocity variation as a function of height of the conducting sheet is also presented. Evidence in support of the criterion of using velocity changes as an indicator of efficiency is presented in the form of mechanical displacement and electric potential plots for several orientations and propagation directions. All velocity displacements and potential calculations were carried out under the assumption that the crystal medium was lithium niobate.