Fig. 4From: Microwave detection and quantification of water hidden in and on building materials: implications for healthy buildings and microbiome studiesS-parameter measurements adding water to a pyrex dish. a Microwave transmission (S21), (b) reflection (S11) and (c) reflection (S22) as a function of microwave frequency. d-f S-parameters averaged over 0.1 GHz frequency bands respectively starting at 5, 6, and 7 GHzBack to article page