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Table 1 Equipment characteristics and measurement parameters.

From: Propagation in Tunnels: Experimental Investigations and Channel Modeling in a Wide Frequency Band for MIMO Applications

Frequency band

2.8–5 GHz

Number of frequency points

1601

Antenna

Biconical antenna (Electrometrics EM-6116)

Transmitter power

20 dBm

Dynamic range

>100 dB

Position in the transverse plane

12 positions every 3 cm (λ/2 at 5 GHz)

Positions along the longitudinal axis

From 50 m to 202 m every 4 m

 

From 202 m to 500 m every 6 m

Number of acquisitions at each position

5