Electromagnetic coupling into rectangular rack-and-panel connectors

Hoeft, L.O.; Montoya, M.T.; Hofstra, J.S.

doi:10.1109/isemc.1995.523604

Cited by 2 publications

(3 citation statements)

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“…Provided that the backshell simulations showed excellent agreement with measurement at low frequencies, the observed discrepancy was identified as due to the contact resistance associated with an imperfect bonding between the shields and the backshell, which was not considered in the model. Therefore, a second set of simulations were performed by adding a series resistance to ground R bs = 15 mΩ (similar values were reported in [12]), and the low-frequency results were improved as it can be seen in the green curves of Figs. 12 and 13.…”

Section: Simulation Results For the Cable Assemblymentioning

confidence: 95%

“…A very good galvanic contact between male and female connectors is required (for example, through the use of RF gaskets) [12]. It is very likely that the inductive behavior of the backshell connection is due to an imperfect mating between the male and female backshells and that the return current is flowing through the securing screws.…”

Section: Backshell Model Parametersmentioning

confidence: 99%

“…4 [22]. Note that other techniques are available in the literature for the evaluation of the transfer impedance of shielded connector assemblies, e.g., [12], [13], and [23]. In the used setup, a copper tape was laid above the bundle path in order to create a pseudomicrostrip line that will induce a current flow along all the cable shields.…”

Section: B Overall Transfer Impedance Of the Cable Assemblymentioning

confidence: 99%

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Numerical Simulation of the Overall Transfer Impedance of Shielded Spacecraft Harness Cable Assemblies

Mora

Rachidi

Pélissou

et al. 2015

IEEE Trans. Electromagn. Compat.

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In this paper, we present general considerations for the application of the multiconductor transmission-line theory for simulating shielded spacecraft harness cable assemblies. Some of the practical issues that occur in the modeling process of various components of cable assemblies in spacecraft applications, namely connectors, pigtails, and backshells are discussed. The overall transfer impedance of the assembly measured through a current injection with a pseudomicrostrip line is used as a figure of merit to evaluate the total shielding provided by the harness. Some of the parameters of the model were available from the manufacturers' datasheets, while others were determined either experimentally or empirically. The position of the cables along the cross section was randomly assigned by the simulation tool. In general, the obtained simulation results are found to be in reasonable agreement with the experimental data. It is found that the generally overlooked contact impedances between the cable shields and connectors play a significant role, especially at low frequencies. The presented simulation results also emphasize the importance of the inductance and resistance of the connector backshell interconnection to the spacecraft chassis.Index Terms-Cable shielding, multiconductor transmission line (MTL), transfer impedance.

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Section: Simulation Results For the Cable Assemblymentioning

confidence: 95%

Section: Backshell Model Parametersmentioning

confidence: 99%