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. 2014 Oct 16;14(10):19354–19370. doi: 10.3390/s141019354

Figure 19.

Figure 19.

Minimum transmission of the sensor for a crack width (w) of 150 μm (Case 1) and 200 μm (Case 2) compared with solid dielectric material (fiberglass) with a dielectric constant of 2.3 (reference case). The crack depth (h) is 1.5 mm.