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SAW device fundamentals with IDT on a piezoelectric substrate. Reproduced with permission from J. Devkota et al. [217], Sensors; published by MDPI, 2017 (open access). IDT pitch is represented as p and IDT aperture is given by A. Reproduced with permission from Rocha-Gaso et al. [209], Sensors; published by MDPI, 2009 (open access).
