Fig. 5
From: See through metallic sensor implemented using proximity resonant coupling
Transmission coefficient \(S_{21}\) due to proximity with metallic object at various distances \(h\) at longer distances (a) cm scale and shorter distances (b) mm scale. (c) Variation in the dip of \(S_{21}\) with respect to distance \(h\). (d) Corresponding shift in resonant frequency with distance \(h\).
