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- W3101500289 abstract "The Fourier transform is a widely used mathematical algorithm that decomposes a time-domain function into its component frequencies. A highly efficient ultraSonic Fast Fourier Transform (SFFT) [1] hardware accelerator will drastically improve the computational speed needed in real-time image recognition and signal processing. The planar GHz frequency compatible ultrasonic lens presented in this paper is necessary to realize a compact (<; 1cc) SFFT system [2]. The wavefronts generated from an array of piezoelectric transducers are focused by the lens to meet the requirement of wavefront FFT computing. This paper presents a planar GHz ultrasonic lens consisting of SiO <sub xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>2</sub> posts embedded into a silicon substrate, fabricated using DRIE processing of silicon wafers. The spatial density of the posts generates a varying phase shift for waves passing through the lens, as shown by FEM simulations. The FEM simulations and the devices provide a pathway to verify lens operation experimentally." @default.
- W3101500289 created "2020-11-23" @default.
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- W3101500289 date "2020-09-07" @default.
- W3101500289 modified "2023-10-15" @default.
- W3101500289 title "Planar Lens for GHz Fourier Ultrasonics" @default.
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- W3101500289 doi "https://doi.org/10.1109/ius46767.2020.9251614" @default.
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