Table 4: Penetration losses of the materials.

MaterialThickness26 GHz39 GHz

Wooden door of the laboratory47.94 mm5.50 dB9.69 dB
Transparent glass door of the hall (one door)12.85 mm3.95 dB4.59 dB
Transparent glass door of the hall (two doors)25.70 mm5.55 dB9.45 dB
Frosted glass door of the small office12.30 mm4.10 dB4.65 dB
Wooden door of the cabinet19.82 mm4.16 dB5.59 dB