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      • Department of Electrical and Electronics Engineering
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      V(Z) of the surface acoustic wave focusing system

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      Author(s)
      Atalar, Abdullah
      Köymen, Hayrettin
      Date
      1986-11
      Source Title
      IEEE 1986 Ultrasonics Symposium
      Publisher
      IEEE
      Pages
      727 - 730
      Language
      English
      Type
      Conference Paper
      Item Usage Stats
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      Abstract
      It is possible to define a V(Z) function for the surface acoustic wave (SAW) focusing system for a class of reflectors similar to that defined in acoustic microscopy. In this case V(Z) is a function which relates the transducer output voltage to the distance between the focal point and the reflection line. It is possible to express V(Z) in an analytical expression using angular spectrum techniques. V(Z) is measured for straight edge reflectors forming various angles with the surface. V(2) of straight step reflectors are investigated. These curves show a dependence on the type of reflector. The experiments are performed at 1.5 MHz in conjunction with a computerized data acquisition system. The phase information is also recorded in all these measurements in addition to the amplitude. It is possible to get an inversion of V(Z) to get the SAW reflection coefficient at a straight discontinuity.
      Keywords
      Surface acoustic waves
      Acoustic waves
      Reflection
      Surface waves
      Aluminum
      Fourier transforms
      Mirrors
      Pulse measurements
      Geometry
      Equations
      Permalink
      http://hdl.handle.net/11693/50809
      Published Version (Please cite this version)
      https://doi.org/10.1109/ULTSYM.1986.198830
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      • Department of Electrical and Electronics Engineering 4011
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