Fig. 10
From: Multi-parameter simultaneous extraction with a novel microwave sensor based on coupled resonators

Plots of the ɛr of the sample against frp2 for calibration purposes. (a) Experimental measurement of the three calibration loads. (b) Simulations (the multiple points are due to the discrete values of ɛr associated to different values of HMUT and, less noticeably, of tan δ).