System-Level EMI of an Artificial Router System with Multiple Radiators: Prediction and Validation
In a multimodule system, an increase in the number of radiating optical modules will increase the electromagnetic emissions. This article investigates the scaled tendency of the emissions in a router system loaded with hundreds of optical modules. An artificial router mimicking the real system was built to investigate this tendency. A patch antenna array mimics the radiation of the optical modules. It can be excited in in-phase and random-phase configurations. The measurement data verifies the theoretical analysis and the prediction from a statistical method without performing hundreds of different experiments on a real router. Assuming that all radiators are radiating at the same frequency and have similar radiation pattern with random phases, the average of the maximal directivity of the system will saturate if the number of radiators (N) is larger than 14. Furthermore, the average of the maximal electric field radiated will increase following a 10 log10 N (dB) tendency.
W. Zhang and J. S. Meiguni and K. Ghosh and A. Patnaik and M. Sorensen and A. Hosseinbeig and D. Pommerenke and J. Rollin and J. Li and Q. Liu and P. Sochoux and D. Kim, "System-Level EMI of an Artificial Router System with Multiple Radiators: Prediction and Validation," IEEE Transactions on Electromagnetic Compatibility, vol. 62, no. 4, pp. 1601-1610, Institute of Electrical and Electronics Engineers (IEEE), Jul 2020.
The definitive version is available at https://doi.org/10.1109/TEMC.2020.3006517
Electrical and Computer Engineering
Electromagnetic Compatibility (EMC) Laboratory
Keywords and Phrases
Artificial System; Averaged Maximal Directivity (D ) Max; Averaged Maximal Electric Field (E ) Max; Electromagnetic Interference (EMI); Maximal Directivity (D ) Max; Maximal Electric Field (E ) Max; Optical Modules; Router System; Scaling; Total Radiated Power (TRP)
International Standard Serial Number (ISSN)
Article - Journal
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15 Jul 2020