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- W2034784640 abstract "A 50 MHz annular array with six equal-area elements was designed. A novel fine-grain, 1-2 micron particle size, lead titanate was used as the piezoelectric material. The full set of electromechanical properties was calculated using resonance techniques. The low permittivity ((epsilon) <SUP>s</SUP><SUB>33</SUB>/(epsilon) <SUB>0</SUB> equals 180) of the lead titanate allowed a larger overall diameter when matching to 50 ohm electronics, which kept the aspect ratio (width/height) of all the elements above 3. Laser micromachining was used to fully separate the array elements, and a double matching layer scheme was used to acoustically match the device. The array was modeled using both one-dimensional (KLM) and finite element modeling (PZFlex), and good agreement between the two was obtained. Using a broadband excitation, a center frequency of 49 MHz was obtained on the echo reflected from a flat reflector, with an inerstion loss of 20 dB and a bandwidth of 50%. Maximum calculated cross-talk values were below -30 dB between elements." @default.
- W2034784640 created "2016-06-24" @default.
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- W2034784640 date "2002-04-12" @default.
- W2034784640 modified "2023-09-23" @default.
- W2034784640 title "<title>Design of a 50-MHz annular array using fine-grain lead titanate</title>" @default.
- W2034784640 doi "https://doi.org/10.1117/12.462142" @default.
- W2034784640 hasPublicationYear "2002" @default.
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