Title :
Diffraction on helical acoustic-surface-wave delay lines and the concept of an anisotropic edge lens
Author :
Papadofrangakis, E. ; Mason, I.M.
Author_Institution :
University College London, Department of Electronic & Electrical Engineering, London, UK
Abstract :
It is shown experimentally that the straight edge between two intersecting planes on Bi12 GeO20 acts, in accordance with the diffraction scaling theorem, as an acoustic-surface-wave lens. A helical delay line can be treated as a repetitive stack of edge lenses. Under certain conditions, the `beam waveguide¿ may be metastable.
Keywords :
acoustic surface wave devices; ultrasonic delay lines; ultrasonic diffraction; Bi12GeO20; acoustic surface wave devices; anisotropic edge lens; diffraction scaling theorem; ultrasonic delay lines; ultrasonic diffraction;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19730219
