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. 2019 Dec 18;11(1):7. doi: 10.3390/mi11010007

Figure 7.

Figure 7

(a) A typical structure of a surface acoustic wave (SAW). (b) SAW ID tag application in a car assembly line. Adapted with permission from Plessky et al. [112]. (c) A wireless temperature monitoring system. Adapted with permission from Ma et al. [113]. (d) Wireless underground temperature sensor system with SAW. Adapted with permission from Kim et al. [114]. (e) Acoustically driven wavelength-division multiplexers using SAW. Adapted with permission from Crespo-Poveda et al. [115]. (f) Lamb wave sensor to decouple the viscosity and density of the liquid. Adapted with permission from Wang et al. [117]. (g) High-performance piezoelectric micromachined ultrasonic transducer (PMUT) with a zero-bending membrane. Adapted with permission from Wang et al. [118]. (h) Broadband PMUT based on a mode-merging. Adapted with permission from Wang et al. [119].