Table 6.

The Average Reflection Loss [$P_{ref}\left(\mathrm{dBm}\right)$−$P_{L\mathrm{o}S}\left(\mathrm{dBm}\right)$] at Six Incident Angles in D-band.

Material	Reflection Loss (dB)
	20°	30°	40°	50°	60°	70°
Wood	17.3	19.1	20.8	26.3	27.7	14.0
Plexiglass	12.9	14.0	15.7	19.1	25.8	14.8
Drywall	13.2	14.4	16.1	18.7	26.6	15.8
Concrete	6.7	8.1	8.9	10.8	16.2	19.3
Red brick	10.0	10.8	13.2	18.4	21.4	15.9