EMI Modeling for Antenna-Chassis System using Characteristic Mode Analysis


Characteristic mode (CM) analysis has been widely used in antenna geometry design, antenna location optimization, and feeding positions, etc. CM analysis has seldomly been used in electromagnetic interference (EMI) modeling. Meanwhile, interactions between the antenna and the vehicle body were modeled with full-wave simulation, but the coupling mechanism has been veiled. In this paper, characteristic mode analysis is applied into the vehicle body to better understand the coupling mechanism of the vehicle modes and the antenna-chassis coupling mechanism. A few typical modes of the vehicle body are discussed first, and how to excite a specific mode is also investigated by looking at the eigen-current and eigen-charge distributions. This paper potentially provides a guideline in tackling EMI problems using CM analysis.

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)


Electrical and Computer Engineering


This material is based upon work supported by the National Science Foundation under Grant No. IIP-1440110.

Keywords and Phrases

Automobile bodies; Busbars; Chassis; Electromagnetic compatibility; Electromagnetic pulse; Antenna geometry; Antenna location optimizations; Characteristic modes; Chassis system; Coupling mechanism; Full-wave simulations; Vehicle body; Antennas; Antenna-chassis; EMI

International Standard Book Number (ISBN)


Document Type

Article - Conference proceedings

Document Version


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

Publication Date

01 Jul 2018