Prediction of Worst-Case Radiation Immunity in Cable Harnesses

Abstract

Radio frequency immunity standards (e.g., RTCA/DO-160G, RTCA/DO-160F) require determining the differential voltage across shielded wires of cable harnesses placed over the metal plate. Due to the external radiation from the antenna, common mode currents are induced on the shields of wires. Through the shield imperfections the outer common mode is converted to the inner common mode of the harness, which in turn is converted to the differential mode. The presented work proposes the equivalent circuit model and methodology for prediction of the worst-case envelope for differential mode signals induced in cable harnesses placed over a ground plane. The induced signals are calculated using the circuit simulation avoiding the need for any 3D calculations. Experimental measurements validate the results.

Meeting Name

2018 IEEE Symposium on Electromagnetic Compatibility, Signal Integrity and Power Integrity, EMC, SI and PI 2018 (2018: Jul. 30-Aug. 3, Long Beach, CA)

Department(s)

Electrical and Computer Engineering

Research Center/Lab(s)

Electromagnetic Compatibility (EMC) Laboratory

Comments

This material is based upon work supported by the National Science Foundation (NSF) under Grants IIP-1440110.

Keywords and Phrases

Antennas; Busbars; Cables; Circuit simulation; Electromagnetic shielding; Equivalent circuits; Forecasting; Plate metal; Radiation shielding, Cable harness; Differential voltage; Induced signal; Radiation immunity; Shielding effectiveness, Electromagnetic compatibility

International Standard Book Number (ISBN)

978-153866621-0

Document Type

Article - Conference proceedings

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 2018 Institute of Electrical and Electronics Engineers (IEEE), All rights reserved.

Publication Date

01 Aug 2018

Link to Full Text

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