Modeling Of The Electromagnetic Interference Of High-speed Connectors In Complex Communication Enclosures

The numerical modeling and wideband response analysis for the complex communication enclosure is one of the most challenging electromagnetic simulation scenarios.That will become much more complicated when the enclosure are loaded with complex interference sources,for instance,the high-density high-speed connectors that transmit multiple random channel.This thesis investigate the modeling and analysis of the interference source,the efficient simulation approach for the interference source and enclosures and the leakage field statistic model for the enclosures when loaded with a complex enclosure.First,the numerical modeling of interference source has been investigated,including the modeling of absorbing material and parasitic parameters.Besides,the sub structure characteristic modes has been introduced to study the resonance characteristics and radiation characteristics,and then a numerical experiment has been also designed to indicate how this method can be incorporate into a design process.Secondly,a background transmission medium model(BTMM)has been introduced to equivalently model the resonant characteristics of enclosures.For realistic complex enclosures,a combined approach based on the reverberation chamber quality factor test theory has been proposed to set the parameters of BTMM.The introduction of BTMM make it unnecessary to model the fine structure and lossy mediums.Then,to further facilitate this simulation process,a cooperative simulation approach is proposed based on the equivalent theory.The near field source of the connector is first extracted and then is integrated into the full wave simulation of the enclosure.Last but not least,to simplify the analysis of random effect of multiple high-speed connector channels,the active element pattern concept is taken to establish the Monte Carlo statistic model of the radiation field by the connector.And then the leakage harness is investigated by co-simulation of enclosures with field sources which cover different probability and have different patterns.