Propagation Mechanism Modeling in the Near-Region of Arbitrary Cross-Sectional Tunnels

Table 1

Comparisons of the dividing point between the model, and the measurements inside rectangular circular, and arched tunnels.

Tunnel	Frequency	Measured	Theoretical
	(GHz)	result	prediction
Railway tunnel in Spain [1]	0.9	30–35 m	30.86 m
Vehicle tunnel in France [21]	0.45	35–40 m	37.88 m
Vehicle tunnel in France [21]	0.9	70–75 m	75.76 m
Pedestrian tunnel in Europe [12]	0.4	15 m	13.65 m
Road tunnel Austria-Slovenia [12]	0.4	15 m	15.41 m