The Reverberating Chamber as a Line-of-Sight Wireless Channel Emulator

Abstract

The reverberating chamber (RC) is employed to physically emulate line-of-sight (LOS) propagation channels and to test the quality of a digital transmission. Use of different absorber configurations is able to generate various LOS propagation channels. The LOS channels are objectively characterized by the Rician K factor and results show that K is not generally dependent only on the number of absorbers but also on their configuration. Experiments are accomplished at the electrically large mode-stirred RC of the Universita di Napoli Parthenope, formerly Istituto Universitario Navale (IUN) and a global system for mobile communications (GSM) digital signal is used

The Fractal Nature of the Electromagnetic Field Within a Reverberating Chamber

“…In order to emulate and analyze the field in a RC appropriate models and procedures have been conceived and applied [1][2][3][4][5][6][7][8][9][10].…”

“…Last but not least, the RC field has been described in terms of replicas of the transmitting field with proper polarization, phase and time delay that are superimposed at the receiver side [5][6][7][8]. When only scattered waves arrive at the terminal, the chamber emulates a NLOS propagation channel [5][6][7].…”

“…When only scattered waves arrive at the terminal, the chamber emulates a NLOS propagation channel [5][6][7]. Differently, when also a direct link between the receiver and the transmitter antenna is present, a LOS propagation channel occurs [8][9][10].…”

Shielding Effectiveness Tests of Low-Cost Civil Engineering Materials in a Reverberating Chamber

“…4 shows the SE values obtained from the CCM after the evaporation process is completed. As expected, the SE values are considerably lower than the first one, with a maximum value equal to 2 dB around high frequencies (14)(15)(16)(17)(18). It is important to note that in order to verify the uncertainty related to the repeatability of the proposed procedure, measurements of the CCM have been evaluated, removed from setup, reinserted and evaluated again.…”

“…Simple from a geometric point of view, the RC is a complex electromagnetic environment that provides an electromagnetic field of the same type encountered in the real-life conditions [16][17][18][19][20][21][22][23][24][25]. As matter of fact, the RC is a chaotic environment [19] in which the input electromagnetic field is randomized by means of different stirring techniques.…”