Virtual Signal Integrity Test on Shielded/Unshielded Twisted-Wire Pairs in Reverberation Chambers Under Realistic Industrial Constraints

Sahand Rasm (1) , Guillaume Andrieu (1) , Alain Reineix (1) , Remi Tumayan (2)

1 XLIM-SRF - Systèmes RF
2 Technocentre Renault [Guyancourt]

A recent method able to perform "virtual" signal integrity test on twisted-wire pairs (shielded or not) using a bulk current injection setup is, in a first part, extended successfully to the case of reverberation chamber tests in order to deal with a higher frequency range. The method, allowing in post-processing to superimpose the effect of the measured disturbance (calculated from S-parameter measurements) to a useful signal generated numerically, is proven to be independent of the measurement conditions (position of the antenna, RC quality factor for instance) and is able to easily consider the electromagnetic field uncertainty. In a second part, the method is improved through the use of full-wave numerical simulations in order to deal with realistic industrial constraints. The method can therefore be applied on twisted wire pairs of any length and connected to frequency-dependent termination loads of any values. The method allows to predict accurately (up to 2 GHz in the paper) the signal integrity of any communication protocol and could help therefore industrial to decide if a shielded version is necessary or not. An example of bit-error-rate prediction is finally done on a 100BASE-T1 fast Ethernet protocol signal on two shielded/unshielded twisted wire pairs.

Mots clés: Bit-error-rate; common-mode; common-mode rejection ratio; common-mode/differential-mode conversion; differential-mode; Ethernet cable; immunity; radiated susceptibility test; reverberation chamber; shielded cable; shielding; signal integrity; twisted-wire pairs

Domaines: Electromagnétisme

Sahand Rasm, Guillaume Andrieu, Alain Reineix, Remi Tumayan. Virtual Signal Integrity Test on Shielded/Unshielded Twisted-Wire Pairs in Reverberation Chambers Under Realistic Industrial Constraints. IEEE Transactions on Electromagnetic Compatibility, In press, pp.1-11. ⟨10.1109/TEMC.2022.3217190⟩. ⟨hal-03850607⟩