EMI Radiation Mitigation for Heatsinks using Characteristic Mode Analysis
Electromagnetic interference (EMI) radiation is one of the vital problems that design engineers may face. As the frequency of an electronic device increases, the potential for a heatsink to act like a radiating antenna also increases. In this paper, characteristic mode (CM) analysis has been applied to investigate the radiation mechanism for the flat heatsink. With the eigencurrent distribution from CM analysis, it can be verified that the radiation characteristics of the flat heatsink behaves like a patch antenna, and the resonant frequencies predicted with CM agree favorably with cavity model. Meanwhile, the optimal position to put the absorbing material can be identified with the dominant eigencurrent distribution. With this proposed method by applying CM analysis, a better shielding performance and less consumption can be achieved.
X. Yang et al., "EMI Radiation Mitigation for Heatsinks using Characteristic Mode Analysis," Proceedings of the 2018 IEEE Symposium on Electromagnetic Compatibility, Signal Integrity and Power Integrity (2018, Long Beach, CA), pp. 374-378, Institute of Electrical and Electronics Engineers (IEEE), Jul 2018.
The definitive version is available at https://doi.org/10.1109/EMCSI.2018.8495291
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
Keywords and Phrases
Busbars; Directional patterns (antenna); Electromagnetic pulse; Electromagnetic shielding; Heat sinks; Microstrip antennas; Natural frequencies; Slot antennas; Absorbing materials; Characteristic modes; Design engineers; Electronic device; Radiating antennas; Radiation characteristics; Radiation mechanism; Shielding performance; Electromagnetic compatibility; EMI; Heatsink
International Standard Book Number (ISBN)
Article - Conference proceedings
© 2018 Institute of Electrical and Electronics Engineers (IEEE), All rights reserved.
01 Jul 2018