Measurement of the Field-to-Wire Coupling to Transmission Line Networks of Shielded Cables in a Reverberation Chamber

The statistic electromagnetic field coupling to a transmission line network of shielded (coaxial) cables above a conducting ground plane has been experimentally investigated in a reverberation chamber over a wide frequency range. The network consisted of three cables with different lengths. The scattering parameters between an antenna and the terminals of the transmission line network have been measured using a vector network analyzer and converted into the average squared magnitude of the coupled terminal voltages. Different configurations of the transmission line network have been tested, where the alignment, length, termination as well as the connection of the shield of certain lines have been altered, in order to analyze the effect onto the resonances of the network (with high amplitudes of the coupled voltage, worst case in terms of EMC).