Figure 5.

In (a–e), photos of the different objects during the measurements are shown. The smartphone is only shown in its orientation parallel to the antenna slot and only the completely filled bottle is shown. A laser pointer, positioned directly above the antenna slot, was used to accurately position the objects in the XY-plane, except in the measurements with the laptop where a grid surface was used for this purpose. In (c,e), the application of styrofoam is shown as it functions as a spacer to alter the height of the objects above the antenna. In (f), the positioning of the antenna within the measurement setup can be seen. The dimensions of the objects are as follows: laptop (376 × 251 mm), book (250 × 170 × 35 mm), smartphone (158 × 77 × 8 mm), hand (180 × 95 × 30 mm), and bottle (60 × 60 × 235 mm).