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Measured transmission coefficients of the fabricated radio frequency (RF) sensor when (a) the fabricated sensor is stretched by L = 4 mm along −x direction; (b) the fabricated sensor is stretched by L = 4 mm along +x direction; (c) the fabricated sensor is stretched by L = 4 mm along +x direction and L = 4 mm along −x direction and (d) L is varied from 0 mm to 16 mm.
